1. General description
The 74HC21 is a high-speed Si-gate CMOS device and is pin compatible with low-power
Schottky TTL (LSTTL).
The 74HC21 provide the 4-input AND function.
2. Features
nLow-power dissipation
nComplies with JEDEC standard no. 7A
nESD protection:
uHBM JESD22-A114E exceeds 2000 V
uMM JESD22-A115-A exceeds 200 V
nMultiple package options
nSpecified from 40 °Cto+80°C and from 40 °C to +125 °C.
3. Ordering information
74HC21
Dual 4-input AND gate
Rev. 05 — 7 May 2009 Product data sheet
Table 1. Ordering information
Type number Package
Temperature range Name Description Version
74HC21N 40 °C to +125 °C DIP14 plastic dual in-line package; 14 leads (300 mil) SOT27-1
74HC21D 40 °C to +125 °C SO14 plastic small outline package; 14 leads;
body width 3.9 mm SOT108-1
74HC21DB 40 °C to +125 °C SSOP14 plastic shrink small outline package; 14 leads;
body width 5.3 mm SOT337-1
74HC21PW 40 °C to +125 °C TSSOP14 plastic thin shrink small outline package; 14 leads;
body width 4.4 mm SOT402-1
74HC21_5 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 05 — 7 May 2009 2 of 14
NXP Semiconductors 74HC21
Dual 4-input AND gate
4. Functional diagram
5. Pinning information
5.1 Pinning
Fig 1. Functional diagram Fig 2. Logic symbol
001aab975
1A
1B
1C
1D
1
2
46
1Y
52A
2B
2C
2D
9
10
12 8
2Y
13
001aab973
1A
1B
1C
1D
1
2
46
1Y
52A
2B
2C
2D
9
10
12 8
2Y
13
Fig 3. IEC Logic symbol Fig 4. Logic diagram
001aab974
&
6
1
2
4
5
&
8
9
10
12
13
001aab976
A
B
C
D
Y
Fig 5. Pin configuration SOT27-1 and SOT108-1 Fig 6. Pin configuration SOT337-1 and SOT402-1
1A VCC
1B 2D
n.c. 2C
1C n.c.
1D 2B
1Y 2A
GND 2Y
001aab972
1
2
3
4
5
6
7 8
10
9
12
11
14
13
74HC21
74HC21
1A VCC
1B 2D
n.c. 2C
1C n.c.
1D 2B
1Y 2A
GND 2Y
001aai659
1
2
3
4
5
6
78
10
9
12
11
14
13
74HC21_5 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 05 — 7 May 2009 3 of 14
NXP Semiconductors 74HC21
Dual 4-input AND gate
5.2 Pin description
6. Functional description
[1] H = HIGH voltage level; L = LOW voltage level; X = don’t care.
7. Limiting values
[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2] For DIP14 package: Ptot derates linearly with 12 mW/K above 70 °C.
For SO14 package: Ptot derates linearly with 8 mW/K above 70 °C.
For (T)SSOP14 packages: Ptot derates linearly with 5.5 mW/K above 60 °C.
Table 2. Pin description
Symbol Pin Description
1A, 1B, 1C, 1D 1, 2, 4, 5 data input
n.c. 3, 11 not connected
1Y 6 data output
GND 7 ground (0 V)
2Y 8 data output
2A, 2B, 2C, 2D 9, 10, 12, 13 data input
VCC 14 supply voltage
Table 3. Function table[1]
Input Output
nA nB nC nD nY
LXXXL
XLXXL
XXLXL
XXXLL
HHHHH
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 V
IIK input clamping current VI < 0.5 V or VI>V
CC + 0.5 V [1] -±20 mA
IOK output clamping current VO<0.5 V or VO>V
CC + 0.5 V [1] -±20 mA
IOoutput current 0.5 V < VO < VCC + 0.5 V - ±25 mA
ICC supply current - 50 mA
IGND ground current 50 - mA
Tstg storage temperature 65 +150 °C
Ptot total power dissipation [2]
DIP14 package - 750 mW
SO14 and (T)SSOP14
packages - 500 mW
74HC21_5 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 05 — 7 May 2009 4 of 14
NXP Semiconductors 74HC21
Dual 4-input AND gate
8. Recommended operating conditions
9. Static characteristics
Table 5. Recommended operating conditions
Voltages are referenced to GND (ground = 0 V)
Symbol Parameter Conditions Min Typ Max Unit
VCC supply voltage 2.0 5.0 6.0 V
VIinput voltage 0 - VCC V
VOoutput voltage 0 - VCC V
t/V input transition rise and fall
rate VCC = 2.0 V - - 625 ns/V
VCC = 4.5 V - 1.67 139 ns/V
VCC = 6.0 V - - 83 ns/V
Tamb ambient temperature 40 - +125 °C
Table 6. Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions 25 °C40 °C to +85 °C40 °C to +125 °C Unit
Min Typ Max Min Max Min Max
VIH HIGH-level
input voltage VCC = 2.0 V 1.5 1.2 - 1.5 - 1.5 - V
VCC = 4.5 V 3.15 2.4 - 3.15 - 3.15 - V
VCC = 6.0 V 4.2 3.2 - 4.2 - 4.2 - V
VIL LOW-level
input voltage VCC = 2.0 V - 0.8 0.5 - 0.5 - 0.5 V
VCC = 4.5 V - 2.1 1.35 - 1.35 - 1.35 V
VCC = 6.0 V - 2.8 1.8 - 1.8 - 1.8 V
VOH HIGH-level
output voltage VI = VIH or VIL
IO = 20 µA; VCC = 2.0 V 1.9 2.0 - 1.9 - 1.9 - V
IO = 20 µA; VCC = 4.5 V 4.4 4.5 - 4.4 - 4.4 - V
IO = 20 µA; VCC = 6.0 V 5.9 6.0 - 5.9 - 5.9 - V
IO = 4.0 mA; VCC = 4.5 V 3.98 4.32 - 3.84 - 3.7 - V
IO = 5.2 mA; VCC = 6.0 V 5.48 5.81 - 5.34 - 5.2 - V
VOL LOW-level
output voltage VI = VIH or VIL
IO = 20 µA; VCC = 2.0 V - 0 0.1 - 0.1 - 0.1 V
IO = 20 µA; VCC = 4.5 V - 0 0.1 - 0.1 - 0.1 V
IO = 20 µA; VCC = 6.0 V - 0 0.1 - 0.1 - 0.1 V
IO = 4.0 mA; VCC = 4.5 V - 0.15 0.26 - 0.33 - 0.4 V
IO = 5.2 mA; VCC = 6.0 V - 0.16 0.26 - 0.33 - 0.4 V
IIinput leakage
current VI = VCC or GND;
VCC = 6.0 V --±0.1 - ±1-±1µA
ICC supply current VI = VCC or GND; IO=0A;
VCC = 6.0 V - - 2.0 - 20 - 40 µA
CIinput
capacitance - 3.5 - - - - - pF
74HC21_5 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 05 — 7 May 2009 5 of 14
NXP Semiconductors 74HC21
Dual 4-input AND gate
10. Dynamic characteristics
[1] tpd is the same as tPHL and tPLH.
[2] tt is the same as tTHL and tTLH.
[3] CPD is used to determine the dynamic power dissipation (PD in µW):
PD=C
PD ×VCC2×fi×N+ (CL×VCC2×fo) where:
fi= input frequency in MHz;
fo= output frequency in MHz;
CL= output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
(CL×VCC2×fo) = sum of outputs.
Table 7. Dynamic characteristics
GND = 0 V; test circuit see Figure 8.
Symbol Parameter Conditions 25 °C40 °C to +85 °C40 °C to +125 °C Unit
Min Typ Max Min Max Min Max
tpd propagation
delay nA, nB, nC or nD to nY;
see Figure 7 [1]
VCC = 2.0 V - 33 110 - 140 - 165 ns
VCC = 4.5 V - 12 22 - 28 - 33 ns
VCC = 6.0 V - 10 19 - 24 - 28 ns
VCC = 5.0 V; CL=15pF-10-----ns
tttransition time nY output; see Figure 7 [2]
VCC = 2.0 V - 19 75 - 95 - 110 ns
VCC = 4.5 V - 7 15 - 19 - 22 ns
VCC = 6.0 V - 6 13 - 16 - 19 ns
CPD power
dissipation
capacitance
VI= GND to VCC [3] -15-----pF
74HC21_5 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 05 — 7 May 2009 6 of 14
NXP Semiconductors 74HC21
Dual 4-input AND gate
11. Waveforms
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig 7. Waveforms showing the input (nA, nB, nC, nD) to output (nY) propagation delays and the output
transition times
001aab977
nA, nB, nC,
nD input
nY output
VM
VX
VI
tPHL
tTHL tTLH
tPLH
VOH
VM
VY
VOL
GND
Table 8. Measurement points
Type Input Output
VMVMVXVY
74HC21 0.5VCC 0.5VCC 0.1VCC 0.9VCC
74HC21_5 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 05 — 7 May 2009 7 of 14
NXP Semiconductors 74HC21
Dual 4-input AND gate
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.
Fig 8. Test circuit for measuring switching times
001aah768
tW
tW
tr
tr
tf
VM
VI
negative
pulse
GND
VI
positive
pulse
GND
10 %
90 %
90 %
10 % VMVM
VM
tf
VCC
DUT
RT
VIVO
CL
G
Table 9. Test data
Type Input Load Test
VItr, tfCL
74HC21 VCC 6.0 ns 15 pF, 50 pF tPLH, tPHL
74HC21_5 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 05 — 7 May 2009 8 of 14
NXP Semiconductors 74HC21
Dual 4-input AND gate
12. Package outline
Fig 9. Package outline SOT27-1 (DIP14)
UNIT A
max. 1 2 (1) (1)
b1cD (1)
Z
Ee M
H
L
REFERENCES
OUTLINE
VERSION EUROPEAN
PROJECTION ISSUE DATE
IEC JEDEC JEITA
mm
inches
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
SOT27-1 99-12-27
03-02-13
A
min. A
max. bmax.
w
ME
e1
1.73
1.13 0.53
0.38 0.36
0.23 19.50
18.55 6.48
6.20 3.60
3.05 0.2542.54 7.62 8.25
7.80 10.0
8.3 2.24.2 0.51 3.2
0.068
0.044 0.021
0.015 0.77
0.73
0.014
0.009 0.26
0.24 0.14
0.12 0.010.1 0.3 0.32
0.31 0.39
0.33 0.0870.17 0.02 0.13
050G04 MO-001 SC-501-14
MH
c
(e )
1
ME
A
L
seating plane
A1
wM
b1
e
D
A2
Z
14
1
8
7
b
E
pin 1 index
0 5 10 mm
scale
Note
1. Plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included.
DIP14: plastic dual in-line package; 14 leads (300 mil) SOT27-1
74HC21_5 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 05 — 7 May 2009 9 of 14
NXP Semiconductors 74HC21
Dual 4-input AND gate
Fig 10. Package outline SOT108-1 (SO14)
UNIT A
max. A1A2A3bpcD
(1) E(1) (1)
eH
ELL
pQZywv θ
REFERENCES
OUTLINE
VERSION EUROPEAN
PROJECTION ISSUE DATE
IEC JEDEC JEITA
mm
inches
1.75 0.25
0.10 1.45
1.25 0.25 0.49
0.36 0.25
0.19 8.75
8.55 4.0
3.8 1.27 6.2
5.8 0.7
0.6 0.7
0.3 8
0
o
o
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.
1.0
0.4
SOT108-1
X
wM
θ
A
A1
A2
bp
D
HE
Lp
Q
detail X
E
Z
e
c
L
vMA
(A )
3
A
7
8
1
14
y
076E06 MS-012
pin 1 index
0.069 0.010
0.004 0.057
0.049 0.01 0.019
0.014 0.0100
0.0075 0.35
0.34 0.16
0.15 0.05
1.05
0.041
0.244
0.228 0.028
0.024 0.028
0.012
0.01
0.25
0.01 0.004
0.039
0.016
99-12-27
03-02-19
0 2.5 5 mm
scale
SO14: plastic small outline package; 14 leads; body width 3.9 mm SOT108-1
74HC21_5 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 05 — 7 May 2009 10 of 14
NXP Semiconductors 74HC21
Dual 4-input AND gate
Fig 11. Package outline SOT337-1 (SSOP14)
UNIT A1A2A3bpcD
(1) E(1) eH
ELL
pQZywv θ
REFERENCES
OUTLINE
VERSION EUROPEAN
PROJECTION ISSUE DATE
IEC JEDEC JEITA
mm 0.21
0.05 1.80
1.65 0.25 0.38
0.25 0.20
0.09 6.4
6.0 5.4
5.2 0.65 1.25 0.2
7.9
7.6 1.03
0.63 0.9
0.7 1.4
0.9 8
0
o
o
0.13 0.1
DIMENSIONS (mm are the original dimensions)
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
SOT337-1 99-12-27
03-02-19
(1)
wM
bp
D
HE
E
Z
e
c
vMA
X
A
y
17
14 8
θ
A
A1
A2
Lp
Q
detail X
L
(A )
3
MO-150
pin 1 index
0 2.5 5 mm
scale
SSOP14: plastic shrink small outline package; 14 leads; body width 5.3 mm SOT337-1
A
max.
2
74HC21_5 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 05 — 7 May 2009 11 of 14
NXP Semiconductors 74HC21
Dual 4-input AND gate
Fig 12. Package outline SOT402-1 (TSSOP14)
UNIT A1A2A3bpcD
(1) E(2) (1)
eH
ELL
pQZywv 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 5.1
4.9 4.5
4.3 0.65 6.6
6.2 0.4
0.3 0.72
0.38 8
0
o
o
0.13 0.10.21
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
SOT402-1 MO-153 99-12-27
03-02-18
wM
bp
D
Z
e
0.25
17
14 8
θ
A
A1
A2
Lp
Q
detail X
L
(A )
3
HE
E
c
vMA
X
A
y
0 2.5 5 mm
scale
TSSOP14: plastic thin shrink small outline package; 14 leads; body width 4.4 mm SOT402-1
A
max.
1.1
pin 1 index
74HC21_5 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 05 — 7 May 2009 12 of 14
NXP Semiconductors 74HC21
Dual 4-input AND gate
13. Abbreviations
14. Revision history
Table 10. Abbreviations
Acronym Description
CMOS Complementary Metal Oxide Semiconductor
DUT Device Under Test
ESD ElectroStatic Discharge
HBM Human Body Model
MM Machine Model
TTL Transistor-Transistor Logic
Table 11. Revision history
Document ID Release date Data sheet status Change notice Supersedes
74HC21_5 20090507 Product data sheet - 74HC21_4
Modifications: Table 1: Type number 74HCT21PW changed to 74HC21PW.
74HC21_4 20090407 Product data sheet - 74HC21_3
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.
Added type number 74HC21PW (TSSOP14 package).
74HC21_3 20041112 Product data sheet - 74HC_HCT21_CNV_2
74HC_HCT21_CNV_2 19970828 Product specification - 74HC_HCT21_1
74HC_HCT21_1 19901201 Product specification - -
74HC21_5 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 05 — 7 May 2009 13 of 14
NXP Semiconductors 74HC21
Dual 4-input AND gate
15. Legal information
15.1 Data sheet status
[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 URL http://www.nxp.com.
15.2 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. NXP Semiconductors does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences of
use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
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 NXP Semiconductors sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.
15.3 Disclaimers
General — Information in this document is believed to be accurate and
reliable. However, NXP Semiconductors does not give any representations or
warranties, expressed or implied, as to the accuracy or completeness of such
information and shall have no liability for the consequences of use of such
information.
Right to make changes — NXP Semiconductors reserves the right to make
changes 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 publication hereof.
Suitability for use — NXP Semiconductors products are not designed,
authorized or warranted to be suitable for use in medical, military, aircraft,
space or life support equipment, nor in applications where failure or
malfunction of an NXP Semiconductors product can reasonably be expected
to result in personal injury, death or severe property or environmental
damage. NXP Semiconductors accepts no liability for inclusion and/or use of
NXP Semiconductors products in such equipment or applications and
therefore such inclusion and/or use is at the customer’s own risk.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. NXP Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) may cause permanent
damage to the device. Limiting values are stress ratings only and operation of
the device at these or any other conditions above those given in the
Characteristics sections of this document is not implied. Exposure to limiting
values for extended periods may affect device reliability.
Terms and conditions of sale — NXP Semiconductors products are sold
subject to the general terms and conditions of commercial sale, as published
at http://www.nxp.com/profile/terms, including those pertaining to warranty,
intellectual property rights infringement and limitation of liability, unless
explicitly otherwise agreed to in writing by NXP Semiconductors. In case of
any inconsistency or conflict between information in this document and such
terms and conditions, the latter will prevail.
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 national authorities.
15.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
16. Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
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.
NXP Semiconductors 74HC21
Dual 4-input AND gate
© NXP B.V. 2009. All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
Date of release: 7 May 2009
Document identifier: 74HC21_5
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
17. Contents
1 General description. . . . . . . . . . . . . . . . . . . . . . 1
2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
3 Ordering information. . . . . . . . . . . . . . . . . . . . . 1
4 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2
5 Pinning information. . . . . . . . . . . . . . . . . . . . . . 2
5.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
5.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3
6 Functional description . . . . . . . . . . . . . . . . . . . 3
7 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 3
8 Recommended operating conditions. . . . . . . . 4
9 Static characteristics. . . . . . . . . . . . . . . . . . . . . 4
10 Dynamic characteristics . . . . . . . . . . . . . . . . . . 5
11 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
12 Package outline . . . . . . . . . . . . . . . . . . . . . . . . . 8
13 Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 12
14 Revision history. . . . . . . . . . . . . . . . . . . . . . . . 12
15 Legal information. . . . . . . . . . . . . . . . . . . . . . . 13
15.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 13
15.2 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
15.3 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 13
15.4 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 13
16 Contact information. . . . . . . . . . . . . . . . . . . . . 13
17 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14