Abstract:

"The TC55VCM416B, TC55VEM416B, TC55YCM416B and TC55YEM416B is a 16,777,216-bit static random access memory (SRAM) organized as 1,048,576 words by 16 bits. Fabricated using Toshiba's CMOS Silicon gate process technology, this device operates from a single 2.3 to 3.6 V/1.65 to 2.2 V power supply. Advanced circuit technology provides both high speed and low power at an operating current of 2 mA/MHz and a minimum cycle time of 40 ns. It is automatically placed in low-power mode at 0.7 �A standby current (at VDD = 3 V, Ta = 25°C, typical) when chip enable (CE1 ) is asserted high or (CE2) is asserted low. There are three control inputs. CE1 and CE2 are used to select the device and for data retention control, and output enable (OE ) provides fast memory access. Data byte control pin ( LB , UB ) provides lower and upper byte access. This device is well suited to various microprocessor system applications where high speed, low power and battery backup are required. And, with a guaranteed operating extrem