The MAX703/MAX704 microprocessor (µP) supervisory circuits reduce the complexity and number of components required for power-supply monitoring and battery control functions in µP systems. These devices significantly improve system reliability and accuracy compared to that obtained with separate ICs or discrete components.

The MAX703/MAX704 are available in 8-pin DIP and SO packages and provide four functions:

1. An active-low reset during power-up, power-down, and brownout conditions.
2. Battery-backup switching for CMOS RAM, CMOS µPs, or other low-power logic circuitry.
3. A 1.25V threshold detector for power-fail warning, low-battery detection, or for monitoring a power supply other than +5V.
4. An active-low manual reset input.

The MAX703 and MAX704 differ only in their supply-voltage monitor levels. The MAX703 generates a reset when the supply drops below 4.65V, while the MAX704generates a reset below 4.40V.

以下关键特性由Maxim美信半导体提供：

Battery-Backup Power Switching

Precision Supply-Voltage Monitor

4.65V (MAX703)

4.40V (MAX704)

200ms Reset Pulse Width

Debounced TTL/CMOS-Compatible Manual ResetInput

200µA Quiescent Current

50nA Quiescent Current in Battery-Backup Mode

Voltage Monitor for Power-Fail or Low-BatteryWarning

8-Pin DIP and SO Packages

Guaranteed RESET-bar Assertion to VCC = 1V

计算机

控制器

精确的µP电源监控

智能仪表

• MAX2051 - SiGe、高线性度、850MHz至1500MHz上/下变频混频器，带有LO缓冲器
• MAX5156 - 低功耗、双路、12位、电压输出DAC，带有可配置输出
• MAX3346E - ±15kV ESD保护、USB收发器，UCSP封装
• MAX4543 - 低电压、单电源、双路、SPST/SPDT模拟开关
• MAX3955 - 11.32Gbps Transceiver with Dual CDRs, Digital Monitors, and DC-Coupled Laser Driver
• MAX1168 - 多通道、16位、200ksps模数转换器
• MAX98303 - 立体声3.1W D类放大器
• MAX6729 - 双/三路、超低电压、SOT23封装、微处理器监控电路
• MAX964 - 单/双/四路、超高速、+3V/+5V、超摆幅比较器
• MAX2671 - 400MHz至2.5GHz上变频器