X40420
The X40420, X40421 combines power-on reset control, watchdog timer, supply voltage supervision, and secondary supervision, manual reset, and Block LockTM protect serial EEPROM in one package. This combination lowers system cost, reduces board space requirements, and increases reliability.
Applying voltage to VCC activates the power-on reset circuit which holds RESET/RESET active for a period of time. This allows the power supply and system oscillator to stabilize before the processor can execute code.
X40420 特点
- 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
- 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
- Monitor voltages: 5V to 1.6V
- Memory security
- Battery switch backup
- VOUT 5mA to 50mA
- Available packages
- Pb-free plus anneal available (RoHS compliant)
X40420 应用
- Communications equipment
- Routers, hubs, switches
- Disk arrays
- Industrial systems
- Process control
- Intelligent instrumentation
- Computer systems
- Desktop computers
- Network servers
X40420 芯片订购指南
X40420 应用技术支持与电子电路设计开发资源下载
- X40420 数据资料 datatSheet 下载.PDF
- Power 电源管理器件产品选型指南 . pdf