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HCF40147B 반도체 회로 부품 판매점

10 TO 4 LINE BCD PRIORITY ENCODER



STMicroelectronics 로고
STMicroelectronics
HCF40147B 데이터시트, 핀배열, 회로
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


HCF40147B 데이터시트, 핀배열, 회로
HCC/HCF40147B
ABSOLUTE MAXIMUM RATING
Symbol
Parameter
Value
Unit
VDD * Supply Voltage: HCC Types
HCF Types
-0.5 to +20
-0.5 to +18
V
V
Vi Input Voltage
II DC Input Current (any one input)
-0.5 to VDD + 0.5
± 10
V
mA
Ptot Total Power Dissipation (per package)
Dissipation per Output Transistor
200 mW
for Top = Full Package Temperature Range
100 mW
Top Operating Temperature: HCC Types
HCF Types
-55 to +125
-40 to +85
oC
oC
Tstg Storage Temperature
-65 to +150
oC
Stresses above those listed under ”Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress ratingonly and functional
operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure
to absolute maximum rating conditions for external periods may affect device reliability.
* All voltage values are referred to VSS pin voltage.
RECOMMENDED OPERATING CONDITIONS
Symbol
VDD
VI
Top
Parameter
Supply Voltage: HCC Types
HCF Types
Input Voltage
Operating Temperature: HCC Types
HCF Types
Value
3 to 18
3 to 15
0 to VDD
-55 to +125
-40 to +85
Unit
V
V
V
oC
oC
TRUTH TABLE
INPUT
OUTPUTS
0 1 2 3 4 5 6 7 8 9DCBA
00000000001111
10000000000000
X1000000000001
XX100 0000 0001 0
XXX10 0000 0001 1
XXXX1 0 0 0 0 0 0 1 0 0
XXXXX1 0 0 0 0 0 1 0 1
XXXXXX1 0 0 0 0 1 1 0
XXXXXXX1 0 0 0 1 1 1
XXXXXXXX1 0 1 0 0 0
XXXXXXXXX1 1 0 0 1
0 = High Level, 1 = Low Level, X = Don’t Care
2/12




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HCF40147B

10 TO 4 LINE BCD PRIORITY ENCODER - STMicroelectronics