參數(shù)資料
型號: CD4532BMS
廠商: Intersil Corporation
英文描述: CMOS 8-Bit Priority Encoder
中文描述: 的CMOS 8位優(yōu)先編碼器
文件頁數(shù): 1/9頁
文件大小: 88K
代理商: CD4532BMS
7-1227
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Copyright Intersil Corporation 1999
CD4532BMS
CMOS 8-Bit Priority Encoder
Pinout
CD4532BMS
TOP VIEW
Functional Diagram
14
15
16
9
13
12
11
10
1
2
3
4
5
7
6
8
D4
D5
D6
D7
EI
Q2
VSS
Q1
VDD
GS
D3
D2
D1
D0
Q0
E0
PRIORITY
SELECT
ENCODER
D7
D0
E1
GS
Q2
Q1
Q0
E0
Features
High Voltage Type (20V Rating)
Converts From 1 of 8 to Binary
Provides Cascading Feature to Handle Any Number of
Inputs
Group Select Indicates One or More Priority Inputs
Standardized Symmetrical Output Characteristics
100% Tested for Quiescent Current at 20V
Maximum Input Current of 1
μ
A at 18V Over Full Pack-
age Temperature Range; 100nA at 18V and +25
o
C
Noise Margin (Over Full Package/Temperature Range)
- 0.5V at VDD = 5V
- 1.5V at VDD = 10V
- 1.5V at VDD = 15V
5V, 10V and 15V Parametric Ratings
Meets All Requirements of JEDEC Tentative Standard
No. 13B, “Standard Specifications for Description of
‘B’ Series CMOS Devices”
Applications
Priority Encoder
Binary or BCD Encoder (Keyboard Encoding)
Floating Point Arithmetic
Description
CD4532BMS 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 E1 is low.
When E1 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 (EO) is high when no priority inputs
are present. If any one input is high, EO is low and all cas-
caded lower-order stages are disabled.
The CD4532BMS is supplied in these 16-lead outline packages:
Braze Seal DIP
Frit Seal DIP
Ceramic Flatpack
H4T
H1E
H6W
December 1992
File Number
3344
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