5962-8858901DA Datasheet, PDF (2/18 Pages) Texas Instruments – DUAL 4-INPUT POSITIVE-NAND GATES

SN54ALS20A, SN54AS20, SN74ALS20A, SN74AS20
DUAL 4ĆINPUT POSITIVEĆNAND GATES
SDAS192B − APRIL 1982 − REVISED DECEMBER 1994
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)^†
Supply voltage, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Input voltage, V_I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Operating free-air temperature range, T_A: SN54ALS20A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55°C to 125°C
SN74ALS20A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
† _{Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and}
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
recommended operating conditions
VCC
VIH
Supply voltage
High-level input voltage
VIL
Low-level input voltage
IOH
High-level output current
IOL
Low-level output current
TA
Operating free-air temperature
‡ _{Applies over temperature range − 55°C to 70°C}
§ _{Applies over temperature range 70°C to 125°C}
SN54ALS20A
MIN NOM MAX
4.5
5 5.5
2
0.8‡
0.7§
− 0.4
4
− 55
125
SN74ALS20A
MIN NOM MAX
4.5
5 5.5
2
0.8
UNIT
V
V
V
−0.4 mA
8 mA
0
70 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54ALS20A
MIN TYP¶ MAX
SN74ALS20A
MIN TYP¶ MAX ^UNIT
VIK
VCC = 4.5 V,
II = −18 mA
−1.5
−1.5 V
VOH
VCC = 4.5 V to 5.5 V,
IOH = − 0.4 mA
VCC − 2
VCC − 2
V
VOL
VCC = 4.5 V
IOL = 4 mA
IOL = 8 mA
0.25 0.4
0.25 0.4
V
0.35 0.5
II
VCC = 5.5 V,
VI = 7 V
0.1
0.1 mA
IIH
VCC = 5.5 V,
VI = 2.7 V
20
20 µA
IIL
VCC = 5.5 V,
IO#
VCC = 5.5 V,
VI = 0.4 V
VO = 2.25 V
− 0.1
−0.1 mA
− 20
−112 −30
−112 mA
ICCH
VCC = 5.5 V,
VI = 0
0.22 0.4
0.22 0.4 mA
ICCL
VCC = 5.5 V,
VI = 4.5 V
0.81 1.5
0.81 1.5 mA
¶ _{All typical values are at VCC = 5 V, TA = 25°C.}
# _{The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.}
2
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
• POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443