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HCF40147B датащи(PDF) 1 Page - STMicroelectronics

номер детали HCF40147B
подробное описание детали  10 TO 4 LINE BCD PRIORITY ENCODER
Download  12 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

HCF40147B датащи(HTML) 1 Page - STMicroelectronics

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HCC40147B
HCF40147B
April 1991
10 TO 4 LINE BCD PRIORITY ENCODER
EY
(Plastic Package)
DESCRIPTION
ORDER CODES :
HCC40147BF
HCF40147BM1
HCF40147BEY
HCF40147BC1
F
(Ceramic Package)
M1
(Micro Package)
C1
(Chip Carrier)
PIN CONNECTIONS
.
ENCODES 10 LINE TO 4 LINE BCD
.
ACTIVE LOW INPUTS AND OUTPUTS
.
STANDARDIZED, SYMMETRICAL OUTPUT
CHARACTERIZATION
.
100 % TESTED FOR QUIESCENT CURRENT
AT 20 V
.
5V, 10V AND 15V PARAMETRIC RATINGS
.
MAXIMUM INPUT CURREENT OF 1
µA AT 18V
OVER
FULL
PACKAGE
TEMPERATURE
RANGE; 100 nA AT 18 V AND 25
oC
.
NOISE MARGIN (FULL PACKAGE TEMPERA-
TURE RANGE): 1V AT VDD = 5V, 2V AT
VDD = 10V, 2.5V AT VDD = 15V
APPLICATIONS:
.
KEYBOARD ENCODING
.
10 LINE TO BCD ENCODING
.
RANGE SELECTION
The HCC/HCF40147B CMOS encoder features
priority encoding of the inputs to ensure that only the
highest order data line is encoded. Ten data input
lines (0-9) are encoded to four line (8, 4, 2, 1) BCD.
The highest priority line is line 9. All four output lines
are logic 1 (VSS) when all input lines are logic 0. All
inputs and outputs are buffered, and each output
can drive one TTL Low Power Schottky load. The
HCC/HCFF40147 is functionally similar to
the
T54/T74LS147 if pin 15 is tied low.
The HCC/HCF40147B types are supplied in 16 lead
plastic or ceramic and plastic micropackage.
1/12


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