HCC4532B Datasheet, PDF (1/15 Pages) STMicroelectronics – 8-BIT PRIORITY ENCODER

HCC/HCF4532B
. CONVERTS FROM 1 OF 8 TO BINARY
. PROVIDES CASCADING FEATURE TO
HANDLE ANY NUMBER OF INPUTS
. GROUP SELECT INDICATES ONE OR MORE
PRIORITY INPUTS
. QUIESCENT CURRENT SPECIFIED TO 20V
FOR HCC DEVICE
. STANDARDIZED SYMMETRICAL OUTPUT
CHARACTERISTICS
. 5V, 10V, AND 15V PARAMETRIC RATINGS
. INPUT CURRENT OF 100 nA AT 18V AND 25°C
FOR HCC DEVICE
. 100% TESTED FOR QUIESCENT CURRENT
. MEETS ALL REQUIREMENTS OF JEDECTEN-
TATIVE STANDARD N^o 13A, ”STANDARD
SPECIFICATIONS FOR DESCRIPTION OF ”B”
SERIES CMOS DEVICES”
8–BIT PRIORITY ENCODER
EY
(Plastic Package)
F
(Ceramic Frit Seal Package)
M1
(Micro Package)
C1
(Plastic Chip Carrier)
ORDER CODES :
HCC4532BF HCF4532BM1
HCF4532BEY HCF4532BC1
PIN CONNECTIONS
DESCRIPTION
The HCC4532B (extended temperature range) and
HCF4532B (intermediate temperature range) are
monolithic integrated circuit, available in 16-lead
dual in-line plastic or ceramic package and plastic
micro package.
The HCC/HCF4532 consists of combinational logic
that encodes the highest priority input (D7-D0) to a
3-bit binary code. The eight inputs, D7 through D0,
each have an assigned priority. D7 is the highest
priority and D0 is the lowest. The priority encoder is
inhibited when the chip-enable input El is low. When
El is high, the binary representation of the highest-
priority input appears on output lines Q2-Q0, and the
group select line GS is high to indicate that priority
inputs are present. The enable-out (EO) is high when
no priority inputs are present. If any one input is high,
E_O is low and all cascaded lower-order stages are
disabled.
June 1989
1/15