SN74ACT2235 1024 × 9 × 2 ASYNCHRONOUS BIDIRECTIONAL FIRST-IN, FIRST-OUT MEMORY

SCAS148E - DECEMBER 1990 - REVISED APRIL 1998

features

Independent Asynchronous Inputs and Outputs
Low-Power Advanced CMOS Technology
Bidirectional
Dual 1024 by 9 Bits
Programmable Almost-Full/Almost-Empty Flag
Empty, Full, and Half-Full Flags
Access Times of 25 ns With a 50-pF Load
Data Rates up to 50 MHz
Fall-Through Times of 22 ns Maximum
High Output Drive for Direct Bus Interface
Package Options Include 44-Pin Plastic Leaded Chip Carriers (FN) and 64-Pin Thin Quad Flat (PAG, PM) Packages

description

A FIFO memory is a storage device that allows data to be written into and read from its array at independent data rates. The SN74ACT2235 is arranged as two 1024 by 9-bit FIFOs for high speed and fast access times. It processes data at rates up to 50 MHz, with access times of 25 ns in a bit-parallel format.

The SN74ACT2235 consists of bus-transceiver circuits, two 1024 × 9 FIFOs, and control circuitry arranged for multiplexed transmission of data directly from the data bus or from the internal FIFO memories. Enable (GAB and GBA) inputs are provided to control the transceiver functions. The select-control (SAB and SBA) inputs are provided to select whether real-time or stored data is transferred. The circuitry used for select control eliminates the typical decoding glitch that occurs in a multiplexer during the transition between stored and real-time data. Figure 2 shows the eight fundamental bus-management functions that can be performed with the SN74ACT2235.

For more information on this device family, see the application report, 1K × 9 × 2 Asynchronous FIFO SN74ACT2235, literature number SCAA010.

The SN74ACT2235 is characterized for operation from 0°C to 70°C.

Title: ASYNCHRONOUS BIDIRECTIONAL FIRST-IN, FIRST-OUT MEMORY
Product Family: STROBED FIFOS
Device Functionality: 1K X 9 ASYNCHRONOUS BIDIRECTIONAL FIFO
Orderable Devices: SN74ACT2235-20FN, SN74ACT2235-20PAG, SN74ACT2235-20PM, SN74ACT2235-30FNR, SN74ACT2235-30PAG, SN74ACT2235-30PM, SN74ACT2235-40FN, SN74ACT2235-40PAG, SN74ACT2235-40PM, SN74ACT2235-60FN, SN74ACT2235-60PAG, SN74ACT2235-20FN, SN74ACT2235-20PAG, SN74ACT2235-20PM, SN74ACT2235-30FNR, SN74ACT2235-30PAG, SN74ACT2235-30PM, SN74ACT2235-40FN, SN74ACT2235-40PAG, SN74ACT2235-40PM, SN74ACT2235-60FN, SN74ACT2235-60PAG

View the complete PDF datasheet: scas148e.pdf (195 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:SN74ACT2235, SN74ACT2235-20, SN74ACT2235-30, SN74ACT2235-40, SN74ACT2235-60

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