Fairchild Semiconductor DM74S40N, DM74S40CW Datasheet
© 2000 Fairchild Semiconductor Corporation DS006453 www.fairchildsemi.com
August 1986
Revised April 2000
DM74S40 Dual 4-Input NAND Buffer
DM74S40
Dual 4-Input NAND Buffer
General Description
This device contain s two in depen dent ga tes each of w hich
performs the logic NAND function.
Ordering Code:
Connection Diagram Function Table
Y = ABCD
H = HIGH Logic Level
L = LOW Logic Level
X = Either LOW or HIGH Logic Level
Order Number Package Number Package Description
DM74S40N N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Inputs Output
ABCDY
XXXLH
XXLXH
XLXXH
LXXXH
HHHHL
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DM74S40
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 (unless otherwise noted)
Note 2: All typicals are at VCC = 5V, TA = 25°C.
Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Switching Characteristics
at VCC = 5V and TA = 25°C
Supply Voltage 7V
Input Voltage 5.5V
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 Voltag e 0.8 V
I
OH
HIGH Level Output Current −3mA
I
OL
LOW Level Output Current 60 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 −1.2 V
V
OH
HIGH Level VCC = Min, IOH = Max
2.7 3.4 V
Output Voltage VIL = Max
V
OL
LOW Level VCC = Min, IOL = Max
0.5 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 = 2.7V 100 µA
I
IL
LOW Level Input Current VCC = Max, VI = 0.5V −4mA
I
OS
Short Circuit Output Current VCC = Max (Note 3) −50 −225 mA
I
CCH
Supply Current with Outputs HIGH VCC = Max 10 18 mA
I
CCL
Supply Current with Outputs LOW VCC = Max 25 44 mA
RL = 93Ω
Symbol Parameter CL = 50 pF CL = 150 pF Units
Min Max Min Max
t
PLH
Propagation Delay Time
26.53 9ns
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
26.53 9ns
HIGH-to-LOW Level Output
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