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LH5491 - Cascadable 64 x 8 FIFO Cascadable 64 x 9 FIFO

General Description

The LH5481 and LH5491 are high-performance, asynchronous First-In, First-Out (FIFO) memories organized 64 words deep by eight or nine bits wide.

The eight-bit LH5481 has an Output Enable (OE) function, which can be used to force the eight data outputs (DO) to a high-impedance state.

Key Features

  • Fastest 64 × 8/9 Cascadable FIFO 35/25/15 MHz.
  • Expandable in Word Width and FIFO Depth.
  • Almost-Full/Almost-Empty and Half-Full Flags.
  • Fully Independent Asynchronous Inputs and Outputs.
  • LH5481 Output Enable forces Data Outputs to High-Impedance State.
  • Pin-Compatible Replacements for Cypress CY7C408A/09A or Logic Devices L8C408/09 FIFOs.
  • Industry Standard Pinout.
  • Packages: 28-Pin, 300-mil DIP 28-Pin PLCC.

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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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LH5481 LH5491 FEATURES • Fastest 64 × 8/9 Cascadable FIFO 35/25/15 MHz • Expandable in Word Width and FIFO Depth • Almost-Full/Almost-Empty and Half-Full Flags • Fully Independent Asynchronous Inputs and Outputs • LH5481 Output Enable forces Data Outputs to High-Impedance State • Pin-Compatible Replacements for Cypress CY7C408A/09A or Logic Devices L8C408/09 FIFOs • Industry Standard Pinout • Packages: 28-Pin, 300-mil DIP 28-Pin PLCC FUNCTIONAL DESCRIPTION The LH5481 and LH5491 are high-performance, asynchronous First-In, First-Out (FIFO) memories organized 64 words deep by eight or nine bits wide. The eight-bit LH5481 has an Output Enable (OE) function, which can be used to force the eight data outputs (DO) to a high-impedance state. The LH5491 has nine data outputs.