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X24645

Part Number	X24645
Manufacturer	Xicor
Description	Advanced 2-Wire Serial E 2 PROM with Block Lock TM Protection
Published	Apr 16, 2005
Detailed Description	Preliminary Information 64K X24645 DESCRIPTION 8192 x 8 Bit Advanced 2-Wire Serial E2PROM with Block LockTM Protectio...
Datasheet	X24645 PDF File

Overview

Preliminary Information 64K X24645 DESCRIPTION 8192 x 8 Bit Advanced 2-Wire Serial E2PROM with Block LockTM Protection FEATURES The X24645 is a CMOS 65,536-bit serial E2PROM, internally organized 8192 x 8.
The X24645 features a serial interface and software protocol allowing operation on a simple two wire bus.
Two device select inputs (S1, S2) allow up to four devices to share a common two wire bus.
A Write Protect Register at the highest address location, 1FFFh, provides three new write protection features: Software Write Protect, Block Write Protect, and Hardware Write Protect.
The Software Write Protect feature prevents any nonvolatile writes to the X24645 until the WEL bit in the write protect register is set.
The Block Write Protection feature allows the user to individually write protect four blocks of the array by programming two bits in the write protect register.
The Programmable Hardware Write Protect feature allows the user to install the X24645 with WP tied to VCC, program the entire memory array in place, and then enable the hardware write protection by programming a WPEN bit in the write protect register.
After this, selected blocks of the array, including the write protect register itself, are permanently write protected, as long as WP remains HIGH.
• • • • • • • • • • • 2.
7V to 5.
5V Power Supply Low Power CMOS —Active Read Current Less Than 1mA —Active Write Current Less Than 3mA —Standby Current Less Than 1µA Internally Organized 8192 x 8 New Programmable Block Lock Protection —Software Write Protection —Programmable hardware Write Protect Block Lock (0, 1/4, 1/2, or all of the E2PROM array) 2 Wire Serial Interface Bidirectional Data Transfer Protocol 32 Byte Page Write Mode —Minimizes Total Write Time Per Byte Self Timed Write Cycle —Typical Write Cycle Time of 5ms High Reliability —Endurance: 100,000 Cycles —Data Retention: 100 Years Available Packages —8-Lead PDIP —8-Lead SOIC (JEDEC) —14-Lead SOIC (JEDEC) —20-Lead TSSOP FUNCTIONAL DIAGRAM...

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