New Features • • • • Monitor Voltages: 5V to 1.6V Memory Security Battery Switch Backup VOUT 5mA to 50mA
Preliminary Da...
New Features Monitor
Voltages: 5V to 1.6V Memory Security Battery Switch Backup VOUT 5mA to 50mA
Preliminary Datasheet
4kbit EEPROM
X40420/X40421
APPLICATIONS Communications Equipment —Routers, Hubs, Switches —Disk arrays Industrial Systems —Process Control —Intelligent Instrumentation Computer Systems —Desktop Computers —Network Servers X40420/21
Dual
Voltage Monitor with Integrated CPU Supervisor and System Battery Switch
FEATURES Dual
voltage detection and reset assertion —Three standard reset threshold settings (4.6V/2.9V, 4.6V/2.6V, 2.9V/1.6V) —VTRIP2 Programmable down to 0.9V —Adjust low
voltage reset threshold
voltages using special programming sequence —Reset signal valid to VCC = 1V —Monitor two
voltages or detect power fail Battery Switch Backup VOUT: 5mA to 50mA from VCC; or 250µA from VBATT Fault detection register Selectable power on reset timeout (0.05s, 0.2s, 0.4s, 0.8s) Selectable watchdog timer interval (25ms, 200ms, 1.4s, off) Debounced manual reset input Low power
CMOS —25µA typical standby current, watchdog on —6µA typical standby current, watchdog off —1µA typical battery current in backup mode www.DataSheet4U.com 4Kbits of EEPROM —16 byte page write mode —Self-timed write cycle —5ms write cycle time (typical) Built-in inadvertent write protection —Power-up/power-down protection circuitry —Block lock protect 0 or 1/2, of EEPROM 400kHz 2-wire interface 2.7V to 5.5V power supply operation Available packages —14-le...