描述 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 present. The enable-out (EO) is high when no priority inputs are present. If any one input is high, EO is low and all cascaded lower-order stages are disabled.

特性 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”

Applications

? Priority Encoder

? Binary or BCD Encoder (Keyboard Encoding)

? Floating Point Arithmetic