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HCF4532 Datasheet

  • HCF4532

  • 8-BIT PRIORITY ENCODER

  • 471.39KB

  • STMicroelectronics  ; STMicroelectronics 

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HCC/HCF4532B
8鈥揃IT PRIORITY ENCODER
.
.
.
.
.
.
.
.
.
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掳C
FOR HCC DEVICE
100% TESTED FOR QUIESCENT CURRENT
MEETS ALL REQUIREMENTS OF JEDEC TEN-
o
TATIVE STANDARD N 13A, 鈥漇TANDARD
SPECIFICATIONS FOR DESCRIPTION OF 鈥滲鈥?/div>
SERIES CMOS DEVICES鈥?/div>
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 E
l
is low. When
E
l
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 (E
O
) 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

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