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CDP1857C - 4-Bit Bus Buffer/Separator

Description

The CDP1857C is a 4-bit CMOS non-inverting bus separator designed for use in CDP1800-series microprocessor systems.

It can be controlled directly by a 1800-series microprocessor without the use of additional components.

Features

  • Provides Easy Connection of I/O to CDP1800-Series Microprocessor Data Bus.
  • Non-Inverting Fully Buffered Data Transfer Ordering Information PART NUMBER CDP1857CE CDP1857CD TEMP. RANGE -40oC to +85oC -40oC to +85oC.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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CDP1857C March 1997 4-Bit Bus Buffer/Separator Description The CDP1857C is a 4-bit CMOS non-inverting bus separator designed for use in CDP1800-series microprocessor systems. It can be controlled directly by a 1800-series microprocessor without the use of additional components. The CDP1857 is designed for use as a bus buffer or separator between the 1800-series microprocessor data bus and I/O devices. It provides a chip-select (CS) input signal which, when high (1), enables the bus-separator three-state output drivers. The direction of data flow, when enabled, is controlled by the MRD input signal. In the CDP1857, when MRD = 1, it enables the three-state bus drivers (DB0-DB3) and transfers data from the DATA-IN lines onto the data bus.
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