UPD445L-1

NEe Microcomputers, Inc. NEe fLPD445L fLPD445L·1 FULLY DECODED 4096 STATIC CMOS RAM DESCRIPTION The ~PD445L is a very low power 4,,096 bit (1024 words by 4 bits) static RAM fabricated with NEC's complementary MOS (CMOS) process, It has two chip enable inputs (CE1, CE2). Minimum standby current is drawn when CE1 is at a high level, while inhibiting I I 'all address and control line transitions or, unconditionally when CE2 is at a low level. This device ideally meets the low power requirements of battery operated systems and battery back-up systems for non-volatility of data. The ~PD445L uses fully static circuitry requiring no clocking. Output data is read out non-destructively by placing a high on the R/W pin and has the same polarity as input data. All inputs and outputs are directly TTL compatible. The device has common input/output data busses and an OD (Output Disable) pin for use in common I/O bus systems. ". The ~PD445L is guaranteed to retain data with the power supply vo...