BUY W91312N https://www.utsource.net/itm/p/1369575.html
Tone/Pulse Dialer With Redial Function/
Description: W91312N is a 4-bit CMOS Static RAM manufactured by Winbond. Features: Low power consumption High speed access time Low voltage operation Low power standby mode 4-bit wide data bus TTL compatible input/output Single +5V power supply Fully static operation Automatic power down Low standby current Wide operating temperature range High reliability Applications: W91312N is suitable for applications such as data storage, buffering, and caching in various consumer, industrial, and automotive applications. (For reference only)