MAX791：微处理器监控电路
功能完备的µP监控电路
The MAX791 microprocessor (µP) supervisory circuit reduces the complexity and number of components needed to monitor power-supply and battery-control functions in µP systems. The 50µA supply current makes the MAX791 ideal for use in portable equipment, while the 6ns chip-enable propagation delay and 250mA output capability (25mA in battery-backup mode) make it suitable for larger, higher-performance equipment. The MAX791 comes in 16-pin DIP and narrow SO packages and provides the following functions: µP reset-RESET-bar output is asserted during power-up, power-down, and brownout conditions, and is guaranteed to be in the correct state for VCC down to 1V, even with no battery in the circuit. Manual-reset input. A 1.25V threshold detector provides for power-fail warning and low-battery detection, or monitors a power supply other than +5V. Two-stage power-fail warning-a separate low-line comparator compares VCC to a threshold 150mV above the reset threshold. Backup-battery switchover for CMOS RAM, real-time clocks, µPs, or other low-power logic. Software monitoring of backup-battery voltage. A watchdog-fault output is asserted if the watchdog input has not been toggled within either a preset or an adjustable timeout period. Write protection of CMOS RAM or EEPROM. Pulsed watchdog output, to give advance warning of impending WDO-bar assertion caused by watchdog timeout.
关键特性
| MAX791：典型工作电路 应用
|
数据手册DataSheet
| 语言 | 下载文件 | 备注 |
|---|---|---|
| 英文 | MAX791.pdf | Rev 7; 03/2006 |
关键参数
| Part Number | Reset Thresh. (V) | Reset Out | ICC (µA) | Oper. Temp. (°C) | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|
| max | See Notes | |||||
| MAX791 | 3.3 to 5.5 |
| 150 |
|
| $5.27 @1k |
质量和环境数据
相关产品
订购型号
| 型号 | 状况 | 推荐替代产品 | 封装 | 温度 | RoHS/无铅 |
|---|---|---|---|---|---|
| MAX791C/D | 停止供货 | DICE SALES,；NA引脚；DICE； | 0°C至+70°C | 参考数据资料 | |
| MAX791CPE | 停止供货 | MAX791CPE+ | PDIP(N),；16引脚；158.4mm² | 0°C至+70°C | RoHS/无铅：否 |
| MAX791CPE+ | 生产中 | PDIP(N),；16引脚；158.4mm² | 0°C至+70°C | RoHS/无铅：无铅 | |
| MAX791CSE | 停止供货 | MAX791CSE+ | SOIC(N),；16引脚；62mm² | 0°C至+70°C | RoHS/无铅：否 |
| MAX791CSE+ | 生产中 | SOIC(N),；16引脚；62mm² | 0°C至+70°C | RoHS/无铅：无铅 | |
| MAX791CSE+T | 生产中 | SOIC(N),；16引脚；62mm² | 0°C至+70°C | RoHS/无铅：无铅 | |
| MAX791CSE-T | 停止供货 | MAX791CSE+T | SOIC(N),；16引脚；62mm² | 0°C至+70°C | RoHS/无铅：否 |
| MAX791CUE | 停止供货 | MAX791CUE+ | TSSOP,；16引脚；33.4mm² | 0°C至+70°C | RoHS/无铅：否 |
| MAX791CUE+ | 生产中 | TSSOP,；16引脚；33.4mm² | 0°C至+70°C | RoHS/无铅：无铅 | |
| MAX791CUE+T | 生产中 | TSSOP,；16引脚；33.4mm² | 0°C至+70°C | RoHS/无铅：无铅 | |
| 型号 | 状况 | 推荐替代产品 | 封装：类型 引脚 占位面积封装图 编码/变更 * | 温度 | RoHS/无铅？ |
| MAX791CUE-T | 停止供货 | MAX791CUE+T | TSSOP；16引脚 | 0°C至+70°C | 参考数据资料 |
| MAX791EJE | 停止供货 | CDIP(N),；16引脚；173.5mm² | -40°C至+85°C | RoHS/无铅：否 | |
| MAX791EPE | 停止供货 | MAX791EPE+ | PDIP(N),；16引脚；158.4mm² | -40°C至+85°C | RoHS/无铅：否 |
| MAX791EPE+ | 生产中 | PDIP(N),；16引脚；158.4mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX791ESE | 停止供货 | MAX791ESE+ | SOIC(N),；16引脚；62mm² | -40°C至+85°C | RoHS/无铅：否 |
| MAX791ESE+ | 生产中 | SOIC(N),；16引脚；62mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX791ESE+T | 生产中 | SOIC(N),；16引脚；62mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| MAX791ESE-T | 停止供货 | MAX791ESE+T | SOIC(N),；16引脚；62mm² | -40°C至+85°C | RoHS/无铅：否 |
| MAX791EUE | 停止供货 | MAX791EUE+ | TSSOP,；16引脚；33.4mm² | -40°C至+85°C | RoHS/无铅：否 |
| MAX791EUE+ | 生产中 | TSSOP,；16引脚；33.4mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| 型号 | 状况 | 推荐替代产品 | 封装：类型 引脚 占位面积封装图 编码/变更 * | 温度 | RoHS/无铅？ |
| MAX791EUE+T | 生产中 | TSSOP； | -40°C至+85°C | 参考数据资料 | |
| MAX791EUE-T | 停止供货 | MAX791EUE+T | TSSOP；16引脚 | -40°C至+85°C | 参考数据资料 |
| MAX791MJE | 生产中 | CDIP(N),；16引脚；173.5mm² | -55°C至+125°C | RoHS/无铅：否 |
- MAX791.pdf MAX791
- MAX791.pdf MAX791
- MAX791.pdf MAX791
- MAX791.pdf MAX791
- MAX791.pdf MAX791
