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LH540215 - 512 x 18 / 1024 x 18 Synchronous FIFO

General Description

NOTE: Throughout this data sheet, a BOLD ITALIC type font is used for all references to Enhanced Operating Mode

Key Features

  • Fast Cycle Times: 20/25/35 ns.
  • Pin-Compatible Drop-In Replacements for IDT72215B/25B FIFOs 512 × 18 / 1024 × 18 Synchronous FIFO.
  • May be Cascaded for Increased Depth, or Paralleled for Increased Width.
  • Five Status Flags: Full, Almost-Full, Half-Full, Almost-Empty, and Empty; ‘Almost’ Flags are Programmable.
  • Choice of IDT-Compatible or Enhanced Operating Mode; Selected by an Input Control Signal.
  • In Enhanced Operating Mode, Almost-Full, H.

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LH540215/25 FEATURES • Fast Cycle Times: 20/25/35 ns • Pin-Compatible Drop-In Replacements for IDT72215B/25B FIFOs 512 × 18 / 1024 × 18 Synchronous FIFO • May be Cascaded for Increased Depth, or Paralleled for Increased Width • Five Status Flags: Full, Almost-Full, Half-Full, Almost-Empty, and Empty; ‘Almost’ Flags are Programmable • Choice of IDT-Compatible or Enhanced Operating Mode; Selected by an Input Control Signal • In Enhanced Operating Mode, Almost-Full, Half-Full, and Almost-Empty Flags can be Made Completely Synchronous • Device Comes Up into One of Two Known Default States at Reset Depending on the State of the EMODE Control Input: Programming is Allowed, but is not Required • In Enhanced Operating Mode, Duplicate Enables for Interlocked Paralleled FIFO Operation, for 36-