DESCRIPTION:

The IDT72510 and IDT72520 are highly integrated first-in, first-out memories that enhance processor-to-processor and processor-to-peripheral communications. IDT BiFIFOs integrate two side-by-side memory arrays for data transfers in two directions.

FEATURES:

• Two side-by-side FIFO memory arrays for bidirectional data transfers

• 512 x 18-Bit – 1024 x 9-Bit (IDT72510)

• 1024 x 18-Bit – 2048 x 9-Bit (IDT72520)

• 18-bit data bus on Port A side and 9-bit data bus on Port B side

• Can be configured for 18-to-9-bit, 36-to-9-bit, or 36-to-18-bit communication

• Fast 25ns access time

• Fully programmable standard microprocessor interface

• Built-in bypass path for direct data transfer between two ports

• Two fixed flags, Empty and Full, for both the A-to-B and the B-to-A FIFO

• Two programmable flags, Almost-Empty and Almost-Full for each FIFO

• Programmable flag offset can be set to any depth in the FIFO

• Any of the eight internal flags can be assigned to four external flag pins

• Flexible reread/rewrite capabilities.

• On-chip parity checking and generation

• Standard DMA control pins for data exchange with peripherals

• IDT72510 and IDT72520 available in the the 52-pin PLCC package