1/10July 2001
■ HIGH SPEED:
t
PD
= 15ns (TYP.) at V
CC
= 6V
■ LOW POWER DISSIPATION:
I
CC
= 4µA(MAX.) at T
A
=25°C
■ HIGH NOISE IMMUNITY:
V
NIH
= V
NIL
= 28 % V
CC
(MIN.)
■ SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 4mA (MIN)
■ BALANCED PROPAGATION DELAYS:
t
PLH
≅ t
PHL
■ WIDE OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 2V to 6V
■ PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 147
DESCRIPTION
The M74HC147 is an high speed CMOS 10 TO 4
LINE PRIORITY ENCODER fabricated with
silicon gate C
2
MOS technology.
This device features priority encoding of the inputs
to ensure that only the highest order data line is
encoded. Nine input lines are encoded to a four
line BCD output. The implied decimal zero
condition requires no input condition as zero is
encoded when all nine data lines are at high logic
level. All data inputs and outputs are active at the
low logic level.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
M74HC147
10 TO 4 LINE PRIORITY ENCODER
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
PACKAGE TUBE T & R
DIP M74HC147B1R
SOP M74HC147M1R M74HC147RM13TR
TSSOP M74HC147TTR
TSSOPDIP SOP
Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)
