UT7C139 Description
Standard Products UT7C138/139 4Kx8/9 Radiation-Hardened Dual-Port Static RAM with Busy Flag Data Sheet January 2002 .
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The UT7C138/139 consists of an array of 4K words of 8 or 9 bits of dual-port SRAM cells, I/O and address lines, and control signals (CE, OE, R/W).
UT7C139 Features
* q 45ns and 55ns maximum address access time q Asynchronous operation for compatibility with industrystandard 4K x 8/9 dual-port static RAM www. DataSheet4U. com q CMOS compatible inputs, TTL/CMOS compatible output levels q Three-state bidirectional data bus q Low operating and standby current q Radiat
UT7C139 Applications
* that require depth expansion, the BUSY pin is open-collector allowing for wired OR circuit configuration. An M/S pin is provided for implementing 16/18-bit or wider memory applications without the need for separate master and slave devices or additional discrete logic. Application areas include inte
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