TL/F/11514
74VHC08 #74VHCT08 Quad 2-Input AND Gate
October 1995
74VHC08 #74VHCT08
Quad 2-Input AND Gate
General Description
The 74VHC/VHCT08 is an advanced high speed CMOS 2
Input AND Gate fabricated with silicon gate CMOS technol-
ogy. It achieves the high-speed operation similar to equiva-
lent Bipolar Schottky TTL while maintaining the CMOS low
power dissipation.
The internal circuit is composed of 4 stages including buffer
output, which provide high noise immunity and stable out-
put. An input protection circuit insures that 0V to 7V can be
applied to the input pins without regard to the supply volt-
age. This device can be used to interface 5V to 3V systems
and two supply systems such as battery backup. This circuit
prevents device destruction due to mismatched supply and
input voltages.
Features
YHigh noise immunity:
VHC VNIH eVNIL e28% VCC (min)
VHCT VIH e2.0V, VIL e0.8V
YPower down protection:
VHC inputs only
VHCT inputs and outputs
YLow noise: VOLP e0.8V (max)
YLow power dissipation:
ICC e2mA (Max) @TAe25§C
YBalanced propagation delays: tPLH jtPHL
YPin and function compatible with 74HC/HCT08
NOTE: Add external pull up resistor to VHCT outputs to drive CMOS
inputs
Commercial Package Package Description
Number
74VHC08M M14A 14-Lead Molded JEDEC SOIC
74VHC08SJ M14D 14-Lead Molded EIAJ SOIC
74VHC08MSC MSC14 14-Lead Molded EIAJ Type 1 SSOP
74VHC08MTC MTC14 14-Lead Molded JEDEC Type 1 TSSOP
74VHC08N N14A 14-Lead Molded DIP
74VHCT08M M14A 14-Lead Molded JEDEC SOIC
74VHCT08SJ M14D 14-Lead Molded EIAJ SOIC
74VHCT08MTC MTC14 14-Lead Molded JEDEC Type 1 TSSOP
74VHCT08N N14A 14-Lead Molded DIP
Note: Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter ‘‘X’’ to the ordering code.
EIAJ Type 1 SSOP available on a Tape and Reel only, order MSCX.
Logic Symbol
IEEE/IEC
TL/F/11514–1
Connection Diagram
Pin Assignment for
DIP, SSOP, TSSOP and SOIC
TL/F/11514–2
Pin Names Description
An,B
nInputs
OnOutputs
Truth Table
ABO
LLL
LHL
HLL
HHH
C
1995 National Semiconductor Corporation RRD-B30M125/Printed in U. S. A.