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M68AF031AL55MS6E Datasheet(PDF) 4 Page - STMicroelectronics |
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M68AF031AL55MS6E Datasheet(HTML) 4 Page - STMicroelectronics |
4 / 22 page M68AF031A 4/22 SUMMARY DESCRIPTION The M68AF031A is a 256 Kbit (262,144 bit) CMOS SRAM, organized as 32,768 bytes. The device features fully static operation requiring no external clocks or timing strobes, with equal address ac- cess and cycle times. It requires a single 4.5 to 5.5V supply. This device has an automatic power- down feature, reducing the power consumption by over 99% when deselected. The M68AF031A is available in SO28 (28-lead Small Outline), PDIP28 (28-pin Plastic Dual-In- Line) and TSOP28 (28-lead Thin Small Outline, Standard and Reverse Pinout) packages. In addition to the standard version, the TSOP28 Standard package is also available in Lead-free version (standard and Tape & Reel packing), in compliance with JEDEC Std J-STD-020B, the ST ECOPACK 7191395 Specification, and the RoHS (Restriction of Hazardous Substances) directive. It is also compliant with Lead-free soldering pro- cesses. Figure 2. Logic Diagram Table 1. Signal Names AI05920C 16 A0-A14 W DQ0-DQ7 VCC M68AF031A G 8 E VSS A0-A14 Address Inputs DQ0-DQ7 Data Input/Output E Chip Enable G Output Enable W Write Enable VCC Supply Voltage VSS Ground NC Not Connected Internally |
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