74AHCT244PW,112 - NEXPERIA

74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

Rev. 6 — 2 July 2020 Product data sheet

1. General description

The 74AHC244; 74AHCT244 is an 8-bit buffer/line driver with 3-state outputs. The device can be

used as two 4-bit buffers or one 8-bit buffer. The device features two output enables (1OE and

2OE), each controlling four of the 3-state outputs. A HIGH on nOE causes the outputs to assume

a high-impedance OFF-state. Inputs are overvoltage tolerant. This feature allows the use of these

devices as translators in mixed voltage environments.

2. Features and benefits

•Wide supply voltage range from 2.0 V to 5.5 V

•Balanced propagation delays

•All inputs have Schmitt-trigger action

•Overvoltage tolerant inputs to 5.5 V

•High noise immunity

•CMOS low power dissipation

•Input levels:

•For 74AHC244: CMOS level

•For 74AHCT244: TTL level

•ESD protection:

•HBM JESD22-A114F exceeds 2000 V

•MM JESD22-A115-A exceeds 200 V

•CDM JESD22-C101E exceeds 1000 V

•Latch-up performance exceeds 100 mA per JESD 78 Class II Level A

•Multiple package options

•Specified from -40 °C to +85 °C and from -40 °C to +125 °C

3. Ordering information

Table 1. Ordering information

PackageType number

Temperature range Name Description Version

74AHC244D

74AHCT244D

-40 °C to +125 °C SO20 plastic small outline package; 20 leads;

body width 7.5 mm

SOT163-1

74AHC244PW

74AHCT244PW

-40 °C to +125 °C TSSOP20 plastic thin shrink small outline package;

20 leads; body width 4.4 mm

SOT360-1

74AHC244BQ

74AHCT244BQ

-40 °C to +125 °C DHVQFN20 plastic dual in-line compatible thermal

enhanced very thin quad flat package; no leads;

20 terminals; body 2.5 × 4.5 × 0.85 mm

SOT764-1

Nexperia 74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

4. Functional diagram

mna170

1A3

1A2

1A1

1A0

1Y0

1Y1

1Y2

1Y3

1OE

2A3

2A2

2A1

2A0

2Y0

2Y1

2Y2

2Y3

2OE

Fig. 1. Functional diagram

mna874

1A0

1A1

1A2

1A3

1OE

1Y0

1Y1

1Y2

1Y3

2A0

2A1

2A2

2A3

2OE

2Y0

2Y1

2Y2

2Y3

Fig. 2. Logic symbol

1EN

mna873

19 EN

Fig. 3. IEC logic symbol

Product data sheet Rev. 6 — 2 July 2020 2 / 16

Nexperia 74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

5. Pinning information

5.1. Pinning

74AHC244

74AHCT244

1OE VCC

1A0 2OE

2Y0 1Y0

1A1 2A0

2Y1 1Y1

1A2 2A1

2Y2 1Y2

1A3 2A2

2Y3 1Y3

GND 2A3

001aae258

Fig. 4. Pin configuration SOT163-1 (SO20) and

SOT360-1 (TSSOP20)

001aah079

74AHC244

74AHCT244

Transparent top view

1Y3

GND(1)

1A3

2Y3

2A2

2Y2 1Y2

1A2 2A1

2Y1 1Y1

1A1 2A0

2Y0 1Y0

1A0 2OE

GND

2A3

1OE

VCC

9 12

8 13

7 14

6 15

5 16

4 17

3 18

2 19

terminal 1

index area

(1) This is not a ground pin. There is no electrical or

mechanical requirement to solder the pad. In case

soldered, the solder land should remain floating or

connected to GND.

Fig. 5. Pin configuration SOT764-1 (DHVQFN20)

5.2. Pin description

Table 2. Pin description

Symbol Pin Description

1OE, 2OE 1, 19 output enable input (active LOW)

1A0, 1A1, 1A2, 1A3 2, 4, 6, 8 data input

2A0, 2A1, 2A2, 2A3 17, 15, 13, 11 data input

1Y0, 1Y1, 1Y2, 1Y3 18, 16, 14, 12 data output

2Y0, 2Y1, 2Y2, 2Y3 3, 5, 7, 9 data output

GND 10 ground (0 V)

VCC 20 supply voltage

6. Functional description

Table 3. Function table

H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.

Control Input Output

nOE nAn nYn

L LL

H H

H X Z

Product data sheet Rev. 6 — 2 July 2020 3 / 16

Nexperia 74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

7. Limiting values

Table 4. Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).

Symbol Parameter Conditions Min Max Unit

VCC supply voltage -0.5 +7.0 V

VIinput voltage -0.5 +7.0 V

IIK input clamping current VI < -0.5 V [1] -20 - mA

IOK output clamping current VO < -0.5 V or VO > VCC + 0.5 V [1] - ±20 mA

IOoutput current VO = -0.5 V to VCC + 0.5 V - ±25 mA

ICC supply current - 75 mA

IGND ground current -75 - mA

Tstg storage temperature -65 +150 °C

Ptot total power dissipation Tamb = -40 °C to +125 °C [2] - 500 mW

[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

[2] For SOT163-1 (SO20) package: Ptot derates linearly with 12.3 mW/K above 109 °C.

For SOT360-1 (TSSOP20) package: Ptot derates linearly with 10.0 mW/K above 100 °C.

For SOT764-1 (DHVQFN20) package: Ptot derates linearly with 12.9 mW/K above 111 °C.

8. Recommended operating conditions

Table 5. Recommended operating conditions

Voltages are referenced to GND (ground = 0 V).

74AHC244 74AHCT244Symbol Parameter Conditions

Min Typ Max Min Typ Max

Unit

VCC supply voltage 2.0 5.0 5.5 4.5 5.0 5.5 V

VIinput voltage 0 - 5.5 0 - 5.5 V

VOoutput voltage 0 - VCC 0 - VCC V

Tamb ambient temperature -40 +25 +125 -40 +25 +125 °C

VCC = 3.3 V ± 0.3 V - - 100 - - - ns/VΔt/ΔV input transition rise and

fall rate VCC = 5.0 V ± 0.5 V - - 20 - - 20 ns/V

Product data sheet Rev. 6 — 2 July 2020 4 / 16

Nexperia 74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

9. Static characteristics

Table 6. Static characteristics

Voltages are referenced to GND (ground = 0 V).

25 °C -40 °C to +85 °C -40 °C to +125 °CSymbol Parameter Conditions

Min Typ Max Min Max Min Max

Unit

74AHC244

VCC = 2.0 V 1.5 - - 1.5 - 1.5 - V

VCC = 3.0 V 2.1 - - 2.1 - 2.1 - V

VIH HIGH-level

input voltage

VCC = 5.5 V 3.85 - - 3.85 - 3.85 - V

VCC = 2.0 V - - 0.5 - 0.5 - 0.5 V

VCC = 3.0 V - - 0.9 - 0.9 - 0.9 V

VIL LOW-level

input voltage

VCC = 5.5 V - - 1.65 - 1.65 - 1.65 V

VI = VIH or VIL

IO = -50 μA; VCC = 2.0 V 1.9 2.0 - 1.9 - 1.9 - V

IO = -50 μA; VCC = 3.0 V 2.9 3.0 - 2.9 - 2.9 - V

IO = -50 μA; VCC = 4.5 V 4.4 4.5 - 4.4 - 4.4 - V

IO = -4.0 mA; VCC = 3.0 V 2.58 - - 2.48 - 2.40 - V

VOH HIGH-level

output voltage

IO = -8.0 mA; VCC = 4.5 V 3.94 - - 3.8 - 3.70 - V

VI = VIH or VIL

IO = 50 μA; VCC = 2.0 V - 0 0.1 - 0.1 - 0.1 V

IO = 50 μA; VCC = 3.0 V - 0 0.1 - 0.1 - 0.1 V

IO = 50 μA; VCC = 4.5 V - 0 0.1 - 0.1 - 0.1 V

IO = 4.0 mA; VCC = 3.0 V - - 0.36 - 0.44 - 0.55 V

VOL LOW-level

output voltage

IO = 8.0 mA; VCC = 4.5 V - - 0.36 - 0.44 - 0.55 V

IOZ OFF-state

output current

VI = VIH or VIL;

VO = VCC or GND; VCC = 5.5 V

- - ±0.25 - ±2.5 - ±10.0 μA

IIinput leakage

current

VI = 5.5 V or GND;

VCC = 0 V to 5.5 V

- - 0.1 - 1.0 - 2.0 μA

ICC supply current VI = VCC or GND; IO = 0 A;

VCC = 5.5 V

- - 4.0 - 40 - 80 μA

CIinput

capacitance

- 3.0 10 - 10 - 10 pF

COoutput

capacitance

- 4.0 - - - - - pF

Product data sheet Rev. 6 — 2 July 2020 5 / 16

Nexperia 74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

25 °C -40 °C to +85 °C -40 °C to +125 °CSymbol Parameter Conditions

Min Typ Max Min Max Min Max

Unit

74AHCT244

VIH HIGH-level

input voltage

VCC = 4.5 V to 5.5 V 2.0 - - 2.0 - 2.0 - V

VIL LOW-level

input voltage

VCC = 4.5 V to 5.5 V - - 0.8 - 0.8 - 0.8 V

VI = VIH or VIL; VCC = 4.5 V

IO = -50 μA 4.4 4.5 - 4.4 - 4.4 - V

VOH HIGH-level

output voltage

IO = -8.0 mA 3.94 - - 3.8 - 3.70 - V

VI = VIH or VIL; VCC = 4.5 V

IO = 50 μA - 0 0.1 - 0.1 - 0.1 V

VOL LOW-level

output voltage

IO = 8.0 mA - - 0.36 - 0.44 - 0.55 V

IOZ OFF-state

output current

VI = VIH or VIL;

VO = VCC or GND; VCC = 5.5 V

- - ±0.25 - ±2.5 - ±10.0 μA

IIinput leakage

current

VI = 5.5 V or GND;

VCC = 0 V to 5.5 V

- - 0.1 - 1.0 - 2.0 μA

ICC supply current VI = VCC or GND; IO = 0 A;

VCC = 5.5 V

- - 4.0 - 40 - 80 μA

ΔICC additional

supply current

per input pin; VI = VCC - 2.1 V;

IO = 0 A; other pins at VCC or

GND; VCC = 4.5 V to 5.5 V

- - 1.35 - 1.5 - 1.5 mA

CIinput

capacitance

- 3 10 - 10 - 10 pF

COoutput

capacitance

- 4.0 - - - - - pF

Product data sheet Rev. 6 — 2 July 2020 6 / 16

Nexperia 74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

10. Dynamic characteristics

Table 7. Dynamic characteristics

GND = 0 V. For test circuit see Fig. 8.

25 °C -40 °C to +85 °C -40 °C to +125 °CSymbol Parameter Conditions

Min Typ[1] Max Min Max Min Max

Unit

74AHC244

nAn to nYn; see Fig. 6 [2]

VCC = 3.0 V to 3.6 V

CL = 15 pF - 5.0 8.4 1.0 10.0 1.0 10.5 ns

CL = 50 pF - 7.0 11.9 1.0 13.5 1.0 15.0 ns

VCC = 4.5 V to 5.5 V

CL = 15 pF - 3.4 5.5 1.0 6.5 1.0 7.0 ns

tpd propagation

delay

CL = 50 pF 5.0 7.5 1.0 8.5 1.0 9.5 ns

nOE to nYn; see Fig. 7 [2]

VCC = 3.0 V to 3.6 V

CL = 15 pF - 6.5 10.6 1.0 12.5 1.0 13.5 ns

CL = 50 pF - 7.5 14.1 1.0 16.0 1.0 18.0 ns

VCC = 4.5 V to 5.5 V

CL = 15 pF - 4.0 7.3 1.0 8.5 1.0 9.5 ns

ten enable time

CL = 50 pF - 5.5 9.3 1.0 10.5 1.0 12.0 ns

nOE to nYn; see Fig. 7 [2]

VCC = 3.0 V to 3.6 V

CL = 15 pF - 5.5 9.7 1.0 11.0 1.0 12.5 ns

CL = 50 pF - 10.0 14.0 1.0 16.0 1.0 17.5 ns

VCC = 4.5 V to 5.5 V

CL = 15 pF - 4.8 7.2 1.0 8.5 1.0 9.0 ns

tdis disable time

CL = 50 pF - 7.0 9.2 1.0 10.5 1.0 11.5 ns

CPD power

dissipation

capacitance

CL = 50 pF; fi = 1 MHz;

VI = GND to VCC

[3] - 10 - - - - - pF

Product data sheet Rev. 6 — 2 July 2020 7 / 16

Nexperia 74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

25 °C -40 °C to +85 °C -40 °C to +125 °CSymbol Parameter Conditions

Min Typ[1] Max Min Max Min Max

Unit

74AHCT244

nAn to nYn; see Fig. 6 [2]

VCC = 4.5 V to 5.5 V

CL = 15 pF - 3.5 7.4 1.0 8.5 1.0 9.5 ns

tpd propagation

delay

CL = 50 pF - 5.0 8.4 1.0 9.5 1.0 10.5 ns

nOE to nYn; see Fig. 7

VCC = 4.5 V to 5.5 V

CL = 15 pF - 3.5 10.4 1.0 12.0 1.0 13.0 ns

ten enable time

CL = 50 pF - 5.5 11.4 1.0 13.0 1.0 14.5 ns

nOE to nYn; see Fig. 7 [2]

VCC = 4.5 V to 5.5 V

CL = 15 pF - 5.0 9.4 1.0 10.0 1.0 12.0 ns

tdis disable time

CL = 50 pF - 7.0 11.4 1.0 13.0 1.0 14.5 ns

CPD power

dissipation

capacitance

CL = 50 pF; fi = 1 MHz;

VI = GND to VCC

[3] - 12 - - - - - pF

[1] Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V).

[2] tpd is the same as tPLH and tPHL.

ten is the same as tPZL and tPZH.

tdis is the same as tPLZ and tPHZ.

[3] CPD is used to determine the dynamic power dissipation PD (μW).

PD = CPD x VCC 2 x fi + ∑(CL x VCC 2 x fo) where:

fi = input frequency in MHz;

fo = output frequency in MHz;

CL = output load capacitance in pF;

VCC = supply voltage in Volts.

Product data sheet Rev. 6 — 2 July 2020 8 / 16

Nexperia 74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

10.1. Waveforms and test circuit

mna171

nAn input

nYn output

tPLH tPHL

GND

VOH

VOL

Measurement points are given in Table 8.

VOL and VOH are typical voltage output levels that occur with the output load.

Fig. 6. Propagation delay input (nAn) to output (nYn)

001aae014

tPLZ

tPHZ

outputs

disabled

outputs

enabled

outputs

enabled

nYn output

LOW-to-OFF

OFF-to-LOW

nYn output

HIGH-to-OFF

OFF-to-HIGH

nOE input

VOL

VOH

VCC

GND

tPZL

tPZH

Measurement points are given in Table 8.

VOL and VOH are typical voltage output levels that occur with the output load.

Fig. 7. Enable and disable times

Table 8. Measurement points

Input OutputType

VMVMVXVY

74AHC244 0.5VCC 0.5VCC VOL + 0.3 V VOH - 0.3 V

74AHCT244 1.5 V 0.5VCC VOL + 0.3 V VOH - 0.3 V

Product data sheet Rev. 6 — 2 July 2020 9 / 16

Nexperia 74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

VMVM

10 %

90 %

0 V

negative

pulse

positive

pulse

0 V

VMVM

90 %

10 %

001aad983

DUT

VCC VCC

VIVO

RLS1

open

Test data is given in Table 9.

Definitions test circuit:

RT = Termination resistance should be equal to output impedance Zo of the pulse generator

CL = Load capacitance including jig and probe capacitance

RL = Load resistance

S1 = Test selection switch

Fig. 8. Test circuit for measuring switching times

Table 9. Test data

Input Load S1 positionType

VItr, tfCLRLtPHL, tPLH tPZH, tPHZ tPZL, tPLZ

74AHC244 VCC 3.0 ns 15 pF, 50 pF 1 kΩ open GND VCC

74AHCT244 3.0 V 3.0 ns 15 pF, 50 pF 1 kΩ open GND VCC

Product data sheet Rev. 6 — 2 July 2020 10 / 16

Nexperia 74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

11. Package outline

UNIT A

max. A

1 A

2 A

3 b

p c D

(1) E

(1) (1)

e H

E L L

p Q Z

y w v θ

REFERENCES

OUTLINE

VERSION

EUROPEAN

PROJECTION ISSUE DATE

IEC JEDEC JEITA

inches

2.65 0.3

0.1

2.45

2.25

0.49

0.36

0.32

0.23

13.0

12.6

7.6

7.4 1.27 10.65

10.00

1.1

1.0

0.9

0.4 8

0.25 0.1

DIMENSIONS (inch dimensions are derived from the original mm dimensions)

Note

1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.

1.1

0.4

SOT163-1

w M

detail X

0.25

075E04 MS-013

pin 1 index

0.1 0.012

0.004

0.096

0.089

0.019

0.014

0.013

0.009

0.51

0.49

0.30

0.29 0.05

1.4

0.055

0.419

0.394

0.043

0.039

0.035

0.016

0.01

0.25

0.01 0.004

0.043

0.016

0.01

0 5 10 mm

scale

v M A

(A )

SO20: plastic small outline package; 20 leads; body width 7.5 mm SOT163-1

99-12-27

03-02-19

Fig. 9. Package outline SOT163-1 (SO20)

Product data sheet Rev. 6 — 2 July 2020 11 / 16

Nexperia 74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

UNIT A

1 A

2 A

3 b

p c D

(1) E (2) (1)

e H

E L L

p Q Z y w v θ

REFERENCES

OUTLINE

VERSION

EUROPEAN

PROJECTION ISSUE DATE

IEC JEDEC JEITA

mm 0.15

0.05

0.95

0.80

0.30

0.19

0.2

0.1

6.6

6.4

4.5

4.3 0.65 6.6

6.2

0.4

0.3

0.5

0.2

0.13 0.1 0.2 1

DIMENSIONS (mm are the original dimensions)

Notes

1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.

2. Plastic interlead protrusions of 0.25 mm maximum per side are not included.

0.75

0.50

SOT360-1 MO-153 99-12-27

03-02-19

w M

0.25

1 10

20 11

pin 1 index

detail X

(A )

v M A

0 2.5 5 mm

scale

TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm SOT360-1

max.

1.1

Fig. 10. Package outline SOT360-1 (TSSOP20)

Product data sheet Rev. 6 — 2 July 2020 12 / 16

Nexperia 74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

References

Outline

version

European

projection Issue date

IEC JEDEC JEITA

SOT764-1 - - -

MO-241

- - -

sot764-1_po

03-01-27

14-12-12

Unit

max

nom

min

1.00 0.05 4.6 3.15 2.6

0.5 3.5 0.1

A(1)

Dimensions (mm are the original dimensions)

Note

1. Plastic or metal protrusions of 0.075 mm maximum per side are not included.

A1b

0.30

c D(1) DhE(1) Eh

1.00

e e1L

0.4

v w

0.05

y y1

0.90 0.02 0.2 4.5 3.00 2.50.25 0.05 0.1

0.85 0.30.80 0.00 4.4 2.85 2.40.18

1.15 0.5

detail X

B A

AC B

scale

2 9

19 12

terminal 1

index area

terminal 1

index area

0 5 mm2.5

DHVQFN20: plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads;

20 terminals; body 2.5 x 4.5 x 0.85 mm SOT764-1

Fig. 11. Package outline SOT764-1 (DHVQFN20)

Product data sheet Rev. 6 — 2 July 2020 13 / 16

Nexperia 74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

12. Abbreviations

Table 10. Abbreviations

Acronym Description

CDM Charge Device Model

CMOS Complementary Metal Oxide Semiconductor

DUT Device Under Test

ESD ElectroStatic Discharge

HBM Human Body Model

MM Machine Model

TTL Transistor-Transistor Logic

13. Revision history

Table 11. Revision history

Document ID Release date Data sheet status Change notice Supersedes

74AHC_AHCT244 v.6 20200702 Product data sheet - 74AHC_AHCT244 v.5

Modifications: •The format of this data sheet has been redesigned to comply with the identity guidelines of

Nexperia.

•Legal texts have been adapted to the new company name where appropriate.

•Section 1 and Section 2 updated.

•Table 4: Derating values for Ptot total power dissipation have been updated.

•Table 6: Conditions for IOZ corrected.

•Package outline drawing of SOT764-1 (Fig. 11) updated.

74AHC_AHCT244 v.5 20071220 Product data sheet - 74AHC_AHCT244 v.4

Modifications: •The format of this data sheet has been redesigned to comply with the new identity

guidelines of NXP Semiconductors.

•Legal texts have been adapted to the new company name where appropriate.

•Section 3: DHVQFN20 package added.

•Section 7: derating values added for DHVQFN20 package.

•Section 11: outline drawing added for DHVQFN20 package.

74AHC_AHCT244 v.4 20060210 Product data sheet - 74AHC_AHCT244 v.3

74AHC_AHCT244 v.3 19990928 Product specification - 74AHC_AHCT244 v.2

74AHC_AHCT244 v.2 19990224 Product specification - 74AHC_AHCT244 v.1

74AHC_AHCT244 v.1 19980921 Product specification - -

Product data sheet Rev. 6 — 2 July 2020 14 / 16

Nexperia 74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

14. Legal information

Data sheet status

Document status

[1][2]

Product

status [3]

Definition

Objective [short]

data sheet

Development This document contains data from

the objective specification for

product development.

Preliminary [short]

data sheet

Qualification This document contains data from

the preliminary specification.

Product [short]

data sheet

Production This document contains the product

specification.

[1] Please consult the most recently issued document before initiating or

completing a design.

[2] The term 'short data sheet' is explained in section "Definitions".

[3] The product status of device(s) described in this document may have

changed since this document was published and may differ in case of

multiple devices. The latest product status information is available on

the internet at https://www.nexperia.com.

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with the same product type number(s) and title. A short data sheet is

intended for quick reference only and should not be relied upon to contain

detailed and full information. For detailed and full information see the relevant

full data sheet, which is available on request via the local Nexperia sales

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data sheet shall define the specification of the product as agreed between

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to information published in this document, including without limitation

specifications and product descriptions, at any time and without notice. This

document supersedes and replaces all information supplied prior to the

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of an Nexperia product can reasonably be expected to result in personal

injury, death or severe property or environmental damage. Nexperia and its

suppliers accept no liability for inclusion and/or use of Nexperia products in

such equipment or applications and therefore such inclusion and/or use is at

the customer’s own risk.

Quick reference data — The Quick reference data is an extract of the

product data given in the Limiting values and Characteristics sections of this

document, and as such is not complete, exhaustive or legally binding.

Applications — Applications that are described herein for any of these

products are for illustrative purposes only. Nexperia makes no representation

or warranty that such applications will be suitable for the specified use

without further testing or modification.

Customers are responsible for the design and operation of their applications

and products using Nexperia products, and Nexperia accepts no liability for

any assistance with applications or customer product design. It is customer’s

sole responsibility to determine whether the Nexperia product is suitable

and fit for the customer’s applications and products planned, as well as

for the planned application and use of customer’s third party customer(s).

Customers should provide appropriate design and operating safeguards to

minimize the risks associated with their applications and products.

Nexperia does not accept any liability related to any default, damage, costs

or problem which is based on any weakness or default in the customer’s

applications or products, or the application or use by customer’s third party

customer(s). Customer is responsible for doing all necessary testing for the

customer’s applications and products using Nexperia products in order to

avoid a default of the applications and the products or of the application or

use by customer’s third party customer(s). Nexperia does not accept any

liability in this respect.

Limiting values — Stress above one or more limiting values (as defined in

the Absolute Maximum Ratings System of IEC 60134) will cause permanent

damage to the device. Limiting values are stress ratings only and (proper)

operation of the device at these or any other conditions above those

given in the Recommended operating conditions section (if present) or the

Characteristics sections of this document is not warranted. Constant or

repeated exposure to limiting values will permanently and irreversibly affect

the quality and reliability of the device.

Terms and conditions of commercial sale — Nexperia products are

sold subject to the general terms and conditions of commercial sale, as

published at http://www.nexperia.com/profile/terms, unless otherwise agreed

in a valid written individual agreement. In case an individual agreement is

concluded only the terms and conditions of the respective agreement shall

apply. Nexperia hereby expressly objects to applying the customer’s general

terms and conditions with regard to the purchase of Nexperia products by

customer.

No offer to sell or license — Nothing in this document may be interpreted

or construed as an offer to sell products that is open for acceptance or the

grant, conveyance or implication of any license under any copyrights, patents

or other industrial or intellectual property rights.

Export control — This document as well as the item(s) described herein

may be subject to export control regulations. Export might require a prior

authorization from competent authorities.

Non-automotive qualified products — Unless this data sheet expressly

states that this specific Nexperia product is automotive qualified, the

product is not suitable for automotive use. It is neither qualified nor tested in

accordance with automotive testing or application requirements. Nexperia

accepts no liability for inclusion and/or use of non-automotive qualified

products in automotive equipment or applications.

In the event that customer uses the product for design-in and use in

automotive applications to automotive specifications and standards,

customer (a) shall use the product without Nexperia’s warranty of the

product for such automotive applications, use and specifications, and (b)

whenever customer uses the product for automotive applications beyond

Nexperia’s specifications such use shall be solely at customer’s own risk,

and (c) customer fully indemnifies Nexperia for any liability, damages or failed

product claims resulting from customer design and use of the product for

automotive applications beyond Nexperia’s standard warranty and Nexperia’s

product specifications.

Translations — A non-English (translated) version of a document is for

reference only. The English version shall prevail in case of any discrepancy

between the translated and English versions.

Trademarks

Notice: All referenced brands, product names, service names and

trademarks are the property of their respective owners.

Product data sheet Rev. 6 — 2 July 2020 15 / 16

Nexperia 74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

Contents

1. General description......................................................1

2. Features and benefits.................................................. 1

3. Ordering information....................................................1

4. Functional diagram.......................................................2

5. Pinning information......................................................3

5.1. Pinning.........................................................................3

5.2. Pin description............................................................. 3

6. Functional description................................................. 3

7. Limiting values............................................................. 4

8. Recommended operating conditions..........................4

9. Static characteristics....................................................5

10. Dynamic characteristics............................................ 7

10.1. Waveforms and test circuit........................................ 9

11. Package outline........................................................ 11

12. Abbreviations............................................................ 14

13. Revision history........................................................14

14. Legal information......................................................15

For more information, please visit: http://www.nexperia.com

For sales office addresses, please send an email to: salesaddresses@nexperia.com

Date of release: 2 July 2020

Product data sheet Rev. 6 — 2 July 2020 16 / 16