The 67C4033-10N is an asynchronous FIFO memory with a 64-word by 5-bit organization, designed for narrow-width data buffering in 5 V logic systems. Its 10 MHz data rate supports moderate-speed data transfers between asynchronous clock domains, such as between a slow peripheral and a faster bus. The 64 x 5 depth suits applications like keyboard scan buffers, printer interface staging, or low-resolution ADC data capture where only a few dozen words need temporary storage. The through-hole 20-DIP package fits legacy PCB layouts and prototyping boards.
Expansion and cascading
The 67C4033-10N supports expansion in both depth and width, meaning multiple devices can be cascaded to create larger FIFO arrays. For depth expansion, connect the full-flag output of one device to the write-enable of the next; for width expansion, parallel the control signals across multiple chips. No FWFT (First-Word Fall-Through) or programmable flags are supported, so the flag timing is fixed and must be accounted for in the controller logic.
Supplied in a 20-pin DIP package (20-DIP body, 20-PDIP footprint), through-hole mounting only. The bulk packaging means parts ship in tubes or trays, not tape-and-reel — plan for manual insertion or wave-solder assembly. Store in dry conditions; the DIP body is not moisture-sensitive but bulk handling can introduce ESD risk.
Suitable for indoor, temperature-controlled environments like office equipment, test instrumentation, and consumer electronics.
It is RoHS non-compliant, which may restrict use in regions with strict RoHS enforcement unless an exemption applies.