SN74ACT7200L, SN74ACT7201LA, SN74ACT7202LA 256 × 9, 512 × 9, 1024 × 9 ASYNCHRONOUS FIRST-IN, FIRST-OUT MEMORIES
SCAS221A - FEBRUARY 1993 - REVISED SEPTEMBER 1995
features
- Reads and Writes Can Be Asynchronous or Coincident
- Organization:
- SN74ACT7200L - 256 × 9
- SN74ACT7201LA - 512 × 9
- SN74ACT7202LA - 1024 × 9
- Fast Data Access Times of 15 ns
- Read and Write Frequencies up to 40 MHz
- Bit-Width and Word-Depth Expansion
- Fully Compatible With the IDT7200/7201/7202
- Retransmit Capability
- Empty, Full, and Half-Full Flags
- TTL-Compatible Inputs
- Available in 28-Pin Plastic DIP (NP), Small-Outline (DV), and 32-Pin Plastic J-Leaded Chip-Carrier (RJ) Packages
description
The SN74ACT7200L, SN74ACT7201LA, and SN74ACT7202LA are constructedwith dual-port SRAM and have internal write and read address countersto provide data throughput on a first-in, first-out (FIFO) basis.Write and read operations are independent and can be asynchronous orcoincident. Empty and full status flags prevent underflow andoverflow of memory, and depth-expansion logic allows combining thestorage cells of two or more devices into one FIFO. Word-widthexpansion is also possible.
Data is loaded into memory by the write-enable (W\) input andunloaded by the read-enable (R\) input. Read and write cycle times of25 ns (40 MHz) are possible with data access times of 15 ns.
These devices are particularly suited for providing a data channelbetween two buses operating at asynchronous rates. Applicationsinclude use as rate buffers from analog-to-digital converters indata- acquisition systems, temporary storage elements between busesand magnetic or optical memories, and queues for communicationsystems. A 9-bit-wide data path is provided for the transmission ofbyte data plus a parity bit or packet-framing information. The readpointer can be reset independently of the write pointer forretransmitting previously read data when a device is not used indepth expansion.
The SN74ACT7200L, SN74ACT7201LA, and SN74ACT7202LA arecharacterized for operation from 0°C to 70°C.
Title: 256 X 9, 512 X 9, 1024 X 9 ASYNCHRONOUS FIRST-IN, FIRST-OUT MEMORIES
Product Family: ASYNCHRONOUS FIFOS
Device Functionality: 1K X 9
Orderable Devices: SN74ACT7200L15DV, SN74ACT7200L15NP, SN74ACT7200L15RJ, SN74ACT7200L20DV, SN74ACT7200L20NP, SN74ACT7200L20RJ, SN74ACT7200L25DV, SN74ACT7200L25NP, SN74ACT7200L25RJ, SN74ACT7200L35DV, SN74ACT7200L35NP, SN74ACT7200L35RJ, SN74ACT7200L50DV, SN74ACT7200L50NP, SN74ACT7200L50RJ, SN74ACT7200L15DV, SN74ACT7200L15NP, SN74ACT7200L15RJ, SN74ACT7200L20DV, SN74ACT7200L20NP, SN74ACT7200L20RJ, SN74ACT7200L25DV, SN74ACT7200L25NP, SN74ACT7200L25RJ, SN74ACT7200L35DV, SN74ACT7200L35NP, SN74ACT7200L35RJ, SN74ACT7200L50DV, SN74ACT7200L50NP, SN74ACT7200L50RJ, SN74ACT7201LA15DV, SN74ACT7201LA15NP, SN74ACT7201LA15RJ, SN74ACT7201LA20DV, SN74ACT7201LA20NP, SN74ACT7201LA20RJ, SN74ACT7201LA25DV, SN74ACT7201LA25NP, SN74ACT7201LA25RJ, SN74ACT7201LA35DV, SN74ACT7201LA35NP, SN74ACT7201LA35RJ, SN74ACT7201LA50DV, SN74ACT7201LA50NP, SN74ACT7201LA50RJ, SN74ACT7201LA15DV, SN74ACT7201LA15NP, SN74ACT7201LA15RJ, SN74ACT7201LA20DV, SN74ACT7201LA20NP, SN74ACT7201LA20RJ, SN74ACT7201LA25DV, SN74ACT7201LA25NP, SN74ACT7201LA25RJ, SN74ACT7201LA35DV, SN74ACT7201LA35NP, SN74ACT7201LA35RJ, SN74ACT7201LA50DV, SN74ACT7201LA50NP, SN74ACT7201LA50RJ, SN74ACT7202LA15DV, SN74ACT7202LA15NP, SN74ACT7202LA15RJ, SN74ACT7202LA25DV, SN74ACT7202LA25NP, SN74ACT7202LA25RJ, SN74ACT7202LA35RJ, SN74ACT7202LA35RJR, SN74ACT7202LA50DV, SN74ACT7202LA50NP, SN74ACT7202LA50RJ, SN74ACT7202LA15DV, SN74ACT7202LA15NP, SN74ACT7202LA15RJ, SN74ACT7202LA25DV, SN74ACT7202LA25NP, SN74ACT7202LA25RJ, SN74ACT7202LA35RJ, SN74ACT7202LA35RJR, SN74ACT7202LA50DV, SN74ACT7202LA50NP, SN74ACT7202LA50RJ
View the complete PDF datasheet: scas221a.pdf (288 K Bytes) (Requires Acrobat Reader 3.x)View more information about generic part numbers:SN74ACT7200L, SN74ACT7200L15, SN74ACT7200L20, SN74ACT7200L25, SN74ACT7200L35, SN74ACT7200L50, SN74ACT7201LA, SN74ACT7201LA15, SN74ACT7201LA20, SN74ACT7201LA25, SN74ACT7201LA35, SN74ACT7201LA50, SN74ACT7202LA, SN74ACT7202LA15, SN74ACT7202LA25, SN74ACT7202LA35, SN74ACT7202LA50
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