X24640

64K X24640 400KHz 2-Wire Serial E2PROM with Block LockTM DESCRIPTION 8K x 8 Bit FEATURES Save Critical Data with Programmable Block Lock Protection —Block Lock (0, 1/4, 1/2, or all of E2PROM Array) —Software Program Protection —Programmable Hardware Write Protect In Circuit Programmable ROM Mode 400KHz 2-Wire Serial Interfac —Schmitt Trigger Input Noise Suppression —Output Slope Control for Ground Bounce Noise Elimination Longer Battery Life With Lower Power —Active Read Current Less Than 1mA —Active Program Current Less Than 3mA —Standby Current Less Than 1µA 1.8V to 3.6V, 2.5V to 5.5V and 4.5V to 5.5V Power Supply Versions 32 Word Page Write Mode —Minimizes Total Write Time Per Word Internally Organized 8K x 8 Bidirectional Data Transfer Protocol Self-Timed Write Cycle —Typical Write Cycle Time of 5ms High Reliability —Endurance: 100,000 Cycles —Data Retention: 100 Years 8-Lead SOIC 20-Lead TSSOP 8-Lead PDIP The X24640 is a CMOS Serial E2PROM, internally organized 8K x 8. The device features a serial interface and software protocol allowing operation on a simple two wire bus. The bus operates at 400 KHz all the way down to 1.8V. Three device select inputs (S0–S2) allow up to eight devices to share a common two wire bus. A Write Protect Register at the highest address location, FFFFh, provides three write protection features: Software Write Protect, Block Lock Protect, and Programmable Hardware Write Protect. The Software Write Protect feat...