IDT71256S70DB

The IDT71256S70DB from Renesas Electronics (originally developed by Integrated Device Technology) is a 256-kilobit CMOS static RAM organized as 32K x 8 bits, delivering asynchronous read and write operations with a nominal access time of 70 nanoseconds. This 5-volt SRAM belongs to the 71256S family, utilizing low-power CMOS fabrication to minimize standby current while retaining stored data without external refresh. The device is housed in a ceramic dual-inline package (CDIP), which provides a hermetically sealed cavity that protects the die from moisture, contaminants, and extreme mechanical stress, making it suitable for applications where long-term reliability and resistance to harsh environments are critical.

Typical end uses span industrial embedded controllers, avionics data buffers, defense guidance systems, and high-reliability medical or downhole equipment where deterministic read/write timing and data integrity cannot be compromised. The CDIP package also supports extended operating temperature ranges common in military and aerospace deployments, though the exact temperature grade should be confirmed against the full ordering part number and associated datasheet. From a procurement standpoint, parallel asynchronous SRAMs of this density are increasingly subject to obsolescence as memory technology shifts toward denser and lower-power serial alternatives. Engineering and supply-chain teams should verify the component’s lifecycle status, the availability of compliant RoHS and SnPb finishes, and whether the part carries certifications such as MIL-STD-883 when deployed in qualified defense programs.