Cypress CY7C1399B-12VXC, 256Kbit asynchronous SRAM, 32K x 8, 12 ns access time, 3V–3.6V supply, 28-BSOJ (7.62 mm) surface-mount package, 0°C–70°C commercial temperature, tube.
| Parameter | Value |
|---|---|
| Memory type | Volatile |
| Mounting type | Surface Mount |
| Voltage | 3V ~ 3.6V |
| Memory interface | Parallel |
| Operating temperature | 0°C~70°C(TA) |
| Package | Tube |
| Technology | SRAM - Asynchronous |
| Access time | 12 ns |
| Memory size | 256Kbit |
| Memory format | SRAM |
| Case | 28-BSOJ (0.300\", 7.62mm Width) |
| Memory organization | 32K x 8 |
| Write cycle time - word, page | 12ns |
256Kbit organized as 32K x 8 is a common depth for small packet buffers, micro-controller scratchpad, or FPGA configuration storage. The parallel interface is straightforward — address, data, chip enable, output enable, write enable — no clock, no refresh. Commercial temperature grade (0°C to 70°C) suits office equipment, telecom indoor racks, and test gear; not for an unheated enclosure or engine bay.
The access time is 12 ns, with a matching 12 ns write cycle time.