Fairchild Semiconductor DM74LS38SJX, DM74LS38SJ, DM74LS38N, DM74LS38MX, DM74LS38M Datasheet
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© 2000 Fairchild Semiconductor Corporation DS006363 www.fairchildsemi.com
August 1986
Revised March 2000
DM74LS38 Quad 2-Input NAND Buffer with Open-Collector Outputs
DM74LS38
Quad 2-Input NAND Buffer 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
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
Inputs Output
ABY
LLH
LHH
HLH
HHL
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DM74LS38
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)
Note 2: All typicals are at VCC = 5V, TA = 25°C.
Switching Characteristics
at VCC = 5V and TA = 25°C
Supply Voltage 7V
Input Voltage 7V
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 24 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 = −18 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
0.35 0.5
Output Voltage VIH = Min V
IOL = 12 mA, VCC = Min 0.25 0.4
I
I
Input Current @ Max Input Voltage VCC = Max, VI = 7V 0.1 mA
I
IH
HIGH Level Input Current VCC = Max, VI = 2.7V 20 µA
I
IL
LOW Level Input Current VCC = Max, VI = 0.4V −0.36 mA
I
CCH
Supply Current with Outputs HIGH VCC = Max 0.9 2 mA
I
CCL
Supply Current with Outputs LOW VCC = Max 6 12 mA
RL = 667Ω
Symbol Parameter
CL = 45 pF CL = 150 pF
Units
Min Max Min Max
t
PLH
Propagation Delay Time
22 48 ns
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
22 29 ns
HIGH-to-LOW Level Output
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