CD40147BMS Datasheet, PDF (1/8 Pages) Intersil Corporation – 10 Line to 4 Line BCD Priority Encoder

CD40147BMS
December 1992
10 Line to 4 Line BCD Priority Encoder
Features
Pinout
• High Voltage Type (20V Rating)
• Encodes 10 Line to 4 Line BCD
CD40147BMS
TOP VIEW
• Active Low Inputs and Outputs
• 100% Tested for Quiescent Current at 20V
• 5V, 10V and 15V Parametric Ratings
• Maximum Input Current of 1µA at 18V Over Full Pack-
age Temperature Range; 100nA at 18V and +25^oC
• Noise Margin (Over Full Package/Temperature Range)
- 1V at VDD = 5V
- 2V at VDD = 10V
- 2.5V at VDD = 15V
41
52
63
74
85
C6
B7
VSS 8
16 VDD
15 0
14 D
13 3
12 2
11 1
10 9
9A
• Standardized Symmetrical Output Characteristics
• Meets All Requirements of JEDEC Tentative Standard
No. 13B, “Standard Specifications for Description of
‘B’ Series CMOS Devices”
Functional Diagram
Applications
• Keyboard Encoding
• 10 Line to BCD Encoding
• Range Selection
9
PRIORITY
SELECT
0
BCD
ENCODER
D 2³
C 2²
B 2¹
A 2⁰
Description
CD40147BMS 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 CD40147BMS is func-
tionally similar to the TTL 54/74147 if pin 15 is tied low.
The CD40147BMS is supplied in these 16-lead outline
packages:
Braze Seal DIP
Frit Seal DIP
Ceramic Flatpack
H4T
H1E
H6W
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Copyright © Intersil Corporation 1999
7-71
File Number 3357