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CD40108BMS - CMOS 4 x 4 Multiport Register

Datasheet Summary

Description

The CD40108BMS is a 4 x 4 multiport register containing four 4-bit registers, write address decoder, two separate read address decoders, and two 3-state output buses.

When the ENABLE input is low, the corresponding output bus is switched, independently of the clock, to a high-impedance state.

Features

  • High Voltage Type (20V Rating).
  • Four 4-Bit Registers.
  • One Input and Two Output Buses.
  • Unlimited Expansion in Bit and Word Directions.
  • Data Lines have latched Inputs.
  • 3-State Outputs.
  • Separate Control of Each Bus, Allowing Simultaneous Independent Reading of Any of Four Registers on Bus A and Bus B and Independent Writing Into Any of the Four Registers.
  • CD40108BMS is Pin-Compatible with Industry Type MC14580.
  • Standa.

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Datasheet Details

Part number CD40108BMS
Manufacturer Intersil Corporation
File Size 157.38 KB
Description CMOS 4 x 4 Multiport Register
Datasheet download datasheet CD40108BMS Datasheet
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CD40108BMS December 1992 CMOS 4 x 4 Multiport Register Description The CD40108BMS is a 4 x 4 multiport register containing four 4-bit registers, write address decoder, two separate read address decoders, and two 3-state output buses. When the ENABLE input is low, the corresponding output bus is switched, independently of the clock, to a high-impedance state. The high-impedance third state provides the outputs with the capability of being connected to the bus lines in a bus-organized system without the need for interface or pull-up components. When the WRITE ENABLE input is high, all data input lines are latched on the positive transition of the CLOCK and the data is entered into the word selected by the write address lines.
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