CMOS 8-Bit Priority Encoder
CD4532BMS
December 1992
CMOS 8-Bit Priority Encoder
Pinout
CD4532BMS TOP VIEW
D4 D5 D6 D7 EI Q2 Q1 VSS 1 2 3 4 5 6 7 8 ...
Description
CD4532BMS
December 1992
CMOS 8-Bit Priority Encoder
Pinout
CD4532BMS TOP VIEW
D4 D5 D6 D7 EI Q2 Q1 VSS 1 2 3 4 5 6 7 8 16 VDD 15 E0 14 GS 13 D3 12 D2 11 D1 10 D0 9 Q0
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 1µA at 18V Over Full Package Temperature Range; 100nA at 18V and +25oC 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”
Functional Diagram
D7 PRIORITY SELECT ENCODER Q2 Q1 Q0
Applications
Priority Encoder Binary or BCD Encoder (Keyboard Encoding) Floating Point Arithmetic
E1 GS D0 E0
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 highestpriority input appears on output lines Q2 - Q0, and the group select line GS is high to indicate that priority inputs are presen...
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