CY7C4261V/CY7C4271V/CY7C4281V/CY7C4291V are high-performance, low-power, advanced FIFOs from Cypress Semiconductor Corporation. They are manufactured with 0.35-micron CMOS technology, support 3.3V power supply, operate at up to 100MHz, and consume low power, making them ideal for low-power systems.
The CY7C4261V‑CY7C4291V family provides high‑speed, low‑power FIFO memories for data buffering in high‑speed acquisition, multiprocessor interfaces, and communication systems. Each device is 9‑bits wide, operates at 3.3 V, and supports asynchronous read/write with programmable status flags.
Electrical specifications include a 100 MHz maximum clock frequency, active supply current of 25 mA (commercial) or 30 mA (industrial), and a 32‑pin PLCC package. Detailed timing parameters, pin definitions, and width‑expansion options are described for system designers.
| Depth options | 16K×9, 32K×9, 64K×9, 128K×9 |
|---|---|
| Supply voltage | 3.3 V |
| Maximum clock frequency | 100 MHz |
| Package type | 32‑pin PLCC |
| Input HIGH voltage (VIH) | 2.0 V |
| Input LOW voltage (VIL) | -0.5 V |
The device operates at 3.3 V, with a permissible range from –0.5 V to +3.6 V.
The FIFO can run up to 100 MHz, giving a 10 ns read/write cycle time.
Four status pins are available: Empty, Full, Programmable Almost Empty, and Programmable Almost Full.
All variants are supplied in a 32‑pin PLCC package.