X24F128 Datasheet | Xicor

APPLICATION NOTE A V A I L A B L E AN84 128K 2-Wire Serial Flash with Block Lock TM Protection 16K 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 Program Protect In Circuit Programmable ROM Mode Longer Battery Life With Lower Power - Active Read Current Less Than 1m A - Active Program Current Less Than 3m A - Standby Current Less Than 1µA 1.8V to 3.6V or 5V “Univolt” Read and Program Power Supply Versions 32 Word Sector Program Mode - Minimizes Total Program Time Per Word 100KHz 2-Wire Serial Interface Internally Organized 16K x 8 Bidirectional Data Transfer Protocol Self-Timed Program Cycle - Typical Program Cycle Time of 5ms High Reliability - Endurance: 100,000 Cycles - Data Retention: 100 Years 8-Lead DIP 16-Lead SOIC DESCRIPTION The X24F128 is a CMOS Serial Flash Memory, internally organized 16K x 8. The device Features a serial interface and software protocol allowing operation on a simple two wire bus. Three device select inputs (S0- S2) allow up to eight devices to share a mon two wire bus. A Program Protect Register at the address location FFFFh provides three program protection Features : Software Program Protect, Block Lock Protect, and Hardware Program Protect. The Software Program Protect feature prevents any nonvolatile writes to the device until the PEL bit in the Program Protect Register is set. The Block Lock Protection feature allows the user to individually block protect four blocks of the array by programming two bits in the Program Protect Register. The Programmable Hardware Program Protect feature allows the user to install the device with PP tied to VCC, program the entire memory array in circuit, and then enable the hardware program protection by programming a PPEN bit in the Program Protect Register. After this, selected blocks of the array, including the Program Protect Register...