DM74LS38 Quad 2-Input NAND Buffer With Open-Collector Outputs
DM74LS38 Quad 2-Input NAND Buffer With Open-Collector Outputs
DM74LS38 Quad 2-Input NAND Buffer With Open-Collector Outputs
August 1986
Revised March 2000
DM74LS38
Quad 2-Input NAND Buffer with Open-Collector Outputs
General Description Pull-Up Resistor Equations
This device contains four independent gates, each of which
performs the logic NAND function. The open-collector out-
puts require external pull-up resistors for proper logical
operation.
Ordering Code:
Order Number Package Number Package Description
DM74LS38M M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
DM74LS38SJ M14D 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
DM74LS38N N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Typ
Symbol Parameter Conditions Min Max Units
(Note 2)
VI Input Clamp Voltage VCC = Min, II = −18 mA −1.5 V
ICEX HIGH Level VCC = Min, VO = 5.5V
250 µA
Output Current VIL = Max
VOL LOW Level VCC = Min, IOL = Max
0.35 0.5
Output Voltage VIH = Min V
IOL = 12 mA, VCC = Min 0.25 0.4
II Input Current @ Max Input Voltage VCC = Max, VI = 7V 0.1 mA
IIH HIGH Level Input Current VCC = Max, VI = 2.7V 20 µA
IIL LOW Level Input Current VCC = Max, VI = 0.4V −0.36 mA
ICCH Supply Current with Outputs HIGH VCC = Max 0.9 2 mA
ICCL Supply Current with Outputs LOW VCC = Max 6 12 mA
Note 2: All typicals are at VCC = 5V, TA = 25°C.
Switching Characteristics
at VCC = 5V and TA = 25°C
RL = 667Ω
Symbol Parameter CL = 45 pF CL = 150 pF Units
Min Max Min Max
tPLH Propagation Delay Time
22 48 ns
LOW-to-HIGH Level Output
tPHL Propagation Delay Time
22 29 ns
HIGH-to-LOW Level Output
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DM74LS38
Physical Dimensions inches (millimeters) unless otherwise noted
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
Package Number M14A
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DM74LS38
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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DM74LS38 Quad 2-Input NAND Buffer with Open-Collector Outputs
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Fairchild does not assume any responsibility for use of any circuitry 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 support devices or systems are devices or systems 2. A critical component in any component of a life support
which, (a) are intended for surgical implant into the device or system whose failure to perform can be rea-
body, or (b) support or sustain life, and (c) whose failure sonably expected to cause the failure of the life support
to perform when properly used in accordance with device or system, or to affect its safety or effectiveness.
instructions for use provided in the labeling, can be rea-
sonably expected to result in a significant injury to the www.fairchildsemi.com
user.
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