DM7438MX - Fairchild Semiconductor

September 1986

Revised February 2000

DM7438 • 7438 Quad 2-Input NAND Buffers with Open-Collector Outputs

DM7438 • 7438

Quad 2-Input NAND Buffers with Open-Collector Outputs

General Descript ion

This device contains four independent gates each of which

performs the logic NAND functio n. The op en-colle ctor out-

puts require external pull-up resistors for proper logical

operation.

Pull-Up Resistor Equations

Where: N1 (IOH) = total ma ximum output high curr ent

for all outputs tied to pull-up resistor

2 (IIH) = total maximum inp ut high cur ren t for

all inputs tied to pull-up resistor

N3 (IIL) = total maximum input low current for

all inputs tied to pull-up resistor

Ordering Code:

Devices also available in Tape and R eel. Speci fy by appending the s uffix let t er “X” to the o rdering c ode.

Connection Diagram Function Table

Y = AB

H = HIGH Logic Lev el

L = LOW Lo gic Level

Order Number Package Number Package Description

DM7438M M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow

DM7438N N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

7438SJ M14D 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

Inputs Output

ABY

LLH

LHH

HLH

HHL

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DM7438 • 7438

Absolute Maximum Ratings(Note 1) Note 1: The “Absolute Maximum Ratings” are those values beyond which

the saf ety of the device cannot be guarante ed. The device s hould not be

operated at these limits. The parametric values defined in the Electrical

Characteristics tables are not gua rant eed at the absolute maximum rati n gs.

The “Re comme nded Operat ing Co ndition s” table will define the cond itions

for actu al device operation.

Recommended Operating Conditions

Electrical Characteristics

over recommended operating free air temperature range (unless otherwise noted)

Switching Characteri stics

at VCC = 5V and TA = 25°C

Note 2: All typic als are at VCC = 5V, TA = 25°C.

Supply Voltage 7V

Input Voltage 5.5V

Output Voltage 7V

Operating Free Air Temperature Range 0°C to +70°C

Storage Temperature Range −65°C to +150°C

Symbol Parameter Min Nom Max Units

VCC Supply Voltage 4.75 5 5.25 V

VIH HIGH Level Input Voltage 2 V

VIL LOW Level Input Voltage 0.8 V

VOH HIGH Level Output Voltage 5.5 V

IOL LOW Level Output Current 48 mA

TAFree Air Operating Temperature 0 70 °C

Symbol Parameter Conditions Min Typ Max Units

(Note 2)

VIInput Clamp Voltage VCC = Min, II = −12 mA −1.5 V

ICEX HIG H Level VCC = Min, VO = 5.5V 250 µA

Output Current VIL = Max

VOL LOW Level VCC = Min, IOL = Max 0.4 V

Output Voltage VIH = Min

IIInput Current @ Max Input Voltage VCC = Max, VI = 5.5V 1 mA

IIH HIGH Level Input Current VCC = Max, VI = 2.4V 40 µA

IIL LOW Level Input Current VCC = Max, VI = 0.4V −1.6 mA

ICCH Supply Current with Outputs HIGH VCC = Max 5 8.5 mA

ICCL Supply Current with Outputs LOW VCC = Max 34 54 mA

Symbol Parameter Conditions Min Max Units

tPLH Propagation Delay Time CL = 45 pF 22 ns

LOW-to-HIGH Level Output RL = 133Ω

tPHL Propagation Delay Time 18 ns

HIGH-to-LOW Level Output

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DM7438 • 7438

Physical Dimensions inches (millimeters) unless otherwise noted

14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow

Package Number M14A

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DM7438 • 7438

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

14-Lead Sma ll Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

Package Number M14D

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DM7438 • 7438 Quad 2-Input NAND Buffers with Open-Collector Outputs

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Packag e Num be r N14A

Fairchild does not assume any responsibility for use of any circu itry described, no circuit patent licenses are implied and

Fairchild reserves the right at any time without notice to change said circuitry and specifications.

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT

DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD

SEMICONDUCTOR CORPORATION. As used herein:

1. Life suppor t de vices o r syst ems are devices or syste ms

which, (a) are intended for surgical implant into the

body, or (b) support or sustain life, and (c) whose failure

to perform when properly used in accordance with

instruct ions fo r use pr ovi de d in the labe l ing, can be re a-

sonably expected to result in a significant injury to the

user.

2. A criti cal com ponen t in any compo nent o f a l ife supp ort

device or system whose failure to perform can be rea-

sonabl y e xpec ted to c ause th e fa i lure of the li fe s upp or t

device or system, or to affect its safety or effectiveness.