December 1990 2
Philips Semiconductors Product specification
8-input multiplexer 74HC/HCT151
FEATURES
• True and complement outputs
• Multifunction capability
• Permits multiplexing from n lines to 1 line
• Non-inverting data path
• See the “251” for the 3-state version
• Output capability: standard
• ICC category: MSI
GENERAL DESCRIPTION
The 74HC/HCT151 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL).
They are specified in compliance with JEDEC standard no. 7A.
QUICK REFERENCE DATA
GND = 0 V; T
amb
=25°C; tr=tf= 6 ns
Notes
1. C
PD
is used to determine the dynamic power dissipation (PD in µW):
PD=CPD× V
CC
2
× fi+∑(CL× V
CC
2
× fo) where:
fi= input frequency in MHz
fo= output frequency in MHz
∑ (CL× V
CC
2
× fo) = sum of outputs
CL= output load capacitance in pF
VCC= supply voltage in V
2. For HC the condition is VI= GND to V
CC
For HCT the condition is VI= GND to VCC− 1.5 V
ORDERING INFORMATION
See
“74HC/HCT/HCU/HCMOS Logic Package Information”
.
SYMBOL PARAMETER CONDITIONS
TYPICAL
UNIT
HC HCT
t
PHL
/ t
PLH
propagation delay CL= 15 pF; VCC=5 V
I
n
to Y, Y 1719ns
S
n
to Y, Y 1920ns
E to Y 1213ns
E to Y 1418ns
C
I
input capacitance 3.5 3.5 pF
C
PD
power dissipation capacitance per package notes 1 and 2 40 40 pF