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P4C1256-25PILF Datasheet(PDF) 1 Page - Pyramid Semiconductor Corporation |
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P4C1256-25PILF Datasheet(HTML) 1 Page - Pyramid Semiconductor Corporation |
1 / 17 page 1 Document # SRAM119 REV G Revised June 2007 P4C1256 HIGH SPEED 32K x 8 STATIC CMOS RAM High Speed (Equal Access and Cycle Times) — 12/15/20/25/35 ns (Commercial) — 15/20/25/35/45 ns (Industrial) — 20/25/35/45/55/70 ns (Military) Low Power Single 5V±10% Power Supply Easy Memory Expansion Using CE CE CE CE CE and OE OE OE OE OE Inputs Common Data I/O Three-State Outputs FUNCTIONAL BLOCK DIAGRAM PIN CONFIGURATIONS 1519B Fully TTL Compatible Inputs and Outputs Advanced CMOS Technology Fast t OE Automatic Power Down Packages —28-Pin 300 mil DIP, SOJ, TSOP —28-Pin 300 mil Ceramic DIP —28-Pin 600 mil Ceramic DIP —28-Pin CERPACK —28-Pin SOP —28-Pin LCC (350 mil x 550 mil) —32-Pin LCC (450 mil x 550 mil) FEATURES DESCRIPTION The P4C1256 is a 262,144-bit high-speed CMOS static RAM organized as 32Kx8. The CMOS memory requires no clocks or refreshing, and has equal access and cycle times. Inputs are fully TTL-compatible. The RAM operates from a single 5V±10% tolerance power supply. Access times as fast as 12 nanoseconds permit greatly enhanced system operating speeds. CMOS is utilized to reduce power consumption to a low level. The P4C1256 is a member of a family of PACE RAM™ prod- ucts offering fast access times. DIP (P5, C5, C5-1, D5-2), SOJ (J5), SOP (S11-1, S11-3) CERPACK (F4) SIMILAR See end of datasheet for LCC and TSOP pin configurations. The P4C1256 device provides asynchronous operation with matching access and cycle times. Memory loca- tions are specified on address pins A 0 to A14. Reading is accomplished by device selection ( CE and output enabling ( OE) while write enable (WE) remains HIGH. By presenting the address under these conditions, the data in the addressed memory location is presented on the data input/output pins. The input/output pins stay in the HIGH Z state when either CE or OE is HIGH or WE is LOW. Package options for the P4C1256 include 28-pin 300 mil DIP, SOJ and TSOP packages. For military tempera- ture range, Ceramic DIP and LCC packages are avail- able. |
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