4Kx9 Asynchronous FIFO — 50 ns access
The SN74ACT7204L50NP is a 4Kx9 FIFO memory from Texas Instruments with a 50 ns asynchronous access time. This means it stores 4,096 words of 9 bits each, with the 9th bit typically used for parity or control, and the 50 ns cycle time allows reads and writes at up to 20 MHz without a clock — the timing is self-timed by the read and write strobes. As an asynchronous FIFO, it uses separate read and write clocks that can run at independent rates, making it suitable for buffering data between two clock domains. The 9-bit width is common in serial communication interfaces where an extra bit carries parity or out-of-band signaling.
Note that this part is RoHS non-compliant — it was manufactured before the RoHS transition or uses lead-bearing solder terminations. If your assembly line requires RoHS-compliant materials, verify the exemption or plan for a leaded process window. Supplied in Bulk packaging — tubes or trays, not tape-and-reel. This is typical for DIP or PLCC packages and means the parts arrive in antistatic tubes for hand-placement or low-volume pick-and-place with tube feeders.
Sourcing and supply
Because the part is active and TI maintains production, the supply chain is stable through authorized distribution, but the Bulk packaging and RoHS-noncompliant status mean lot traceability and date-code consistency matter — a mismatch between the laser-etched date-code font and TI's plant marking for that week is a red flag on the gray market.