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. 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
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