器件名称: SMS1242S-C
功能描述: 2.5V, 3V, 3.3V & 5V Dual Voltage, Dual Reset Microprocessor Supervisory Circuits
文件大小: 78.29KB 共11页
简 介:SUMMIT
MICROELECTRONICS, Inc.
SMS1242
2.5V, 3V, 3.3V & 5V Dual Voltage, Dual Reset Microprocessor Supervisory Circuits
FEATURES
Supply voltage monitor - Nominal VRST of 2.45V, 2.65V, 2.95V, 4.45V, 4.55V or 4.65V - RESET# Outputs Guaranteed true at VCC = 1V - 150ms Reset Delay Time Second voltage monitor - VSENSE Input - 1.25V threshold ±1% Manual Reset Input Includes 16k-bits nonvolatile memory - Industry standard 2-wire serial interface
OVERVIEW
The SMS1242 microprocessor supervisory circuit reduces the complexity and number of components required to monitor the supply voltage in +5V, +3V and +2.5V systems. The SMS1242 will significantly improve system reliability and accuracy when compared to implementing the same functions with discrete components. The SMS1242 provides reset output during power-up, power-down, and brown-out conditions. It has a 1.25V threshold input detector for power-fail warning, low battery detection, or monitoring a secondary power supply. The part also integrates a separate active low manual reset input. It also has 16k-bits of nonvolatile memory accessible over an industry standard 2-wire serial interface.
FUNCTIONAL BLOCK DIAGRAM
VCC 8 SCL SDA 6 5 NONVOLATILE MEMORY ARRAY
VSENSE 3
+ – 7 MR# 2 RESET1#
+ –
VTRIP
RESET GENERATOR 1 RESET2#
1.25V
4 GND
2038 BD 2.0
SUMMIT MICROELECTRONICS, Inc. 2000 300 Orchard City Drive, Suite 131 Campbell, CA 95008 Phone 408-378-6461 Fax 408-378-6586 www.summitmicro.com 2038 2.0 6/8/00 Characteris……
