X24C44S集成电路（IC）的存储器规格书PDF中文资料

DESCRIPTION

The Xicor X24C44 is a serial 256 bit NOVRAM featuring a static RAM configured 16 x 16, overlaid bit-by-bit with a nonvolatile E2PROM array. The X24C44 is fabricated with Xicor’s Advanced CMOS Floating Gate technology. The Xicor NOVRAM design allows data to be transferred between the two memory arrays by means of software commands or external hardware inputs. A store opera

tion (RAM data to E2PROM) is completed in 5ms or less and a recall operation (E2PROM data to RAM) is completed in 2µs or less.

FEATURES

• Advanced CMOS Version of Xicor’s X2444

• 16 x 16 Organization

• Single 5 Volt Supply

• Ideal for use with Single Chip Microcomputers

—Static Timing

—Minimum I/O Interface

—Serial Port Compatible (COPS™, 8051)

—Easily Interfaced to Microcontroller Ports

• Software and Hardware Control of Nonvolatile

Functions

• Auto Recall on Power-Up

• TTL and CMOS Compatible

• Low Power Dissipation

—Active Current: 10mA Maximum

—Standby Current: 50µA Maximum

• 8-Lead PDIP, Cerdip, and 8-Lead SOIC Packages

• High Reliability

—Store Cycles: 1,000,000

—Data Retention: 100 Years