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© 2000 Fairchild Semiconductor Corporation DS006513 www.fairchildsemi.com
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 Description
This device contains four independent gates each of which
performs the logic NA ND functio n. The open -collector outputs require external pull-up resistors for proper logical
operation.
Pull-Up Resistor Equations
Where: N1 (IOH) = total maximum output high c urrent
for all outputs tied to pull-up resistor
N
2
(IIH) = total maximum input high current for
all inputs tied to pull-up resistor
N
3
(IIL) = total maximum input low current for
all inputs tied to pull-up resistor
Ordering Code:
Devices also availab le in Tape and Reel. Specify by appending th e s uffix let t er “X” to the ordering code.
Connection Diagram Function Table
Y = AB
H = HIGH Logic Level
L = LOW Logic 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 safety of the dev ice cannot be guaranteed. T he device sh ould not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommend ed O peratin g Cond itions” t able w ill defin e the co ndition s
for actual device operation.
Recommended Operating Conditions
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Switching Characteristics
at VCC = 5V and TA = 25°C
Note 2: All typicals 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
V
CC
Supply Voltage 4.75 5 5.25 V
V
IH
HIGH Level Input Voltage 2 V
V
IL
LOW Level Input Voltage 0.8 V
V
OH
HIGH Level Output Voltage 5.5 V
I
OL
LOW Level Output Current 48 mA
T
A
Free Air Operating Temperature 0 70 °C
Symbol Parameter Conditions Min
Typ
Max Units
(Note 2)
V
I
Input Clamp Voltage VCC = Min, II = −12 mA −1.5 V
I
CEX
HIGH Level VCC = Min, VO = 5.5V
250 µA
Output Current VIL = Max
V
OL
LOW Level VCC = Min, IOL = Max
0.4 V
Output Voltage VIH = Min
I
I
Input Current @ Max Input Voltage VCC = Max, VI = 5.5V 1 mA
I
IH
HIGH Level Input Current VCC = Max, VI = 2.4V 40 µA
I
IL
LOW Level Input Current VCC = Max, VI = 0.4V −1.6 mA
I
CCH
Supply Current with Outputs HIGH VCC = Max 5 8.5 mA
I
CCL
Supply Current with Outputs LOW VCC = Max 34 54 mA
Symbol Parameter Conditions Min Max Units
t
PLH
Propagation Delay Time CL = 45 pF
22 ns
LOW-to-HIGH Level Output RL = 133Ω
t
PHL
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 Small 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
Package Number N14A
Fairchild does not assume any responsibility for use of any circu itry described, no circuit patent license s 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 support devices or systems are dev ic es 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
instructions for use provided i n the labe li ng, can be re asonably expected to result in a significant injury to the
user.
2. A critical componen t in any com ponent o f a l ife supp ort
device or system whose failu re to perform can b e reasonably expected 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.
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