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HCF40147B PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 HCF40147B
部品説明 10 TO 4 LINE BCD PRIORITY ENCODER
メーカ STMicroelectronics
ロゴ STMicroelectronics ロゴ 



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HCF40147B Datasheet, HCF40147B PDF,ピン配置, 機能
HCC40147B
HCF40147B
10 TO 4 LINE BCD PRIORITY ENCODER
. 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
EY
(Plastic Package)
M1
(Micro Package)
F
(Ceramic Package)
C1
(Chip Carrier)
ORDER CODES :
HCC40147BF
HCF40147BM1
HC F 4 0147 BE Y
HCF40147BC1
PIN CONNECTIONS
DESCRIPTION
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.
April 1991
1/12

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10 TO 4 LINE BCD PRIORITY ENCODER

STMicroelectronics
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