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X25045

Xicor
Part Number X25045
Manufacturer Xicor
Description Programmable Watchdog Supervisory E2PROM
Published Apr 16, 2005
Detailed Description APPLICATION NOTES A V A I L A B L E AN11 • AN21 X25043/45 4K X25043/45 Programmable Watchdog Supervisory E2PROM DESCRI...
Datasheet PDF File X25045 PDF File

X25045
X25045

Overview
APPLICATION NOTES A V A I L A B L E AN11 • AN21 X25043/45 4K X25043/45 Programmable Watchdog Supervisory E2PROM DESCRIPTION 512 x 8 Bit FEATURES • • • • • • • • • • • • • Programmable Watchdog Timer Low VCC Detection Reset Signal Valid to VCC = 1V 1MHz Clock Rate 512 X 8 Bits Serial E2PROM —4 Byte Page Mode Low Power CMOS —50µA Standby Current —3mA Active Current 2.
7V To 5.
5V Power Supply Block LockTM —Protect 1/4, 1/2 or all of E2PROM Array Built-in Inadvertent Write Protection —Power-Up/Power-Down protection circuitry —Write Latch —Write Protect Pin High Reliability —Endurance: 100,000 cycles per byte —Data Retention: 100 Years —ESD protection: 2000V on all pins Available Packages —8-Lead PDlP —8-Lead SOIC —14-Lead TSSOP X25043 = Active LOW RESET X25045 = Active HIGH RESET The X25043/45 combines three popular functions, Watchdog Timer, Voltage Supervision, and E2PROM in a single package.
This combination lowers the system cost and reduces the board space requirements.
The Watchdog Timer provides an independent protection system for microcontrollers.
During a system failure, the X25043/45 watchdog will respond with a RESET/ RESET signal after a selectable time-out interval.
The user selects the interval from three preset values.
Once selected, the interval does not change, even after cycling the power.
The system is protected from low voltage conditions by the X25043/45 low VCC detection circuits.
When VCC drops below the minimum VCC trip point, the system is reset.
Reset is asserted until VCC returns and stabilizes.
The memory portion of the X25043/45 is a CMOS 4096bit serial E2PROM, internally organized as 512 X 8.
The X25043/45 features a Serial Peripheral Interface (SPI) and software protocol allowing operation on a simple three-wire bus.
The X25043/45 utilizes Xicor’s proprietary Direct Write™ cell, providing a minimum endurance of 100,000 cycles per byte and a minimum data retention of 100 years.
DIE PHOTOGRAPH RESET CONTROL LOGIC PROGRAMMABLE VO...


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