MM54C914 MM74C914 Hex Schmitt Trigger with Extended Input Voltage
February 1988
MM54C914 MM74C914 Hex Schmitt
Trigger with Extended Input Voltage
General Description
The MM54C914 MM74C914 is a monolithic CMOS Hex
Schmitt trigger with special input protection scheme This
scheme allows the input voltage levels to exceed V
CC
or
ground by at least 10V (V
CC
b
25V to GND
a
25V) and is
valuable for applications involving voltage level shifting or
mismatched power supplies
The positive and negative-going threshold voltages V
T
a
and V
T
b
show low variation with respect to temperature
(typ 0 0005V C at V
CC
e
10V) And the hysteresis
V
T
a
b
V
T
b
t
0 2 V
CC
is guaranteed
Features
Y
Hysteresis
Special input protection
Wide supply voltage range
High noise immunity
Low power TTL
compatibility
Y
Y
Y
Y
0 45 V
CC
(typ )
0 2 V
CC
guaranteed
Extended Input
Voltage Range
3V to 15V
0 7 V
CC
(typ )
Fan out of 2
driving 74L
Connection Diagram
Dual-In-Line Package
Order Number MM54C914 or MM74C914
TL F 5917 鈥?1
Top View
Special Input Protection
8V
25V
for the diodes
TL F 5917 鈥?2
C
1995 National Semiconductor Corporation
TL F 5917
RRD-B30M105 Printed in U S A