The MAX6365–MAX6368 supervisory circuits simplify power-supply monitoring, battery-backup control functions, and memory write protection in microprocessor (µP) systems. The circuits significantly improve the size, accuracy, and reliability of modern systems with an ultra-small integrated solution.

These devices perform four basic system functions:

1. Provide a µP reset output during VCC supply power-up, power-down, and brownout conditions.
2. Internally control VCC to backup-battery switching to maintain data or low-power operation for CMOS RAM, CMOS µPs, real-time clocks, and other digital logic when the main supply fails.
   
3. Provide memory write protection through internal chip-enable gating during supply or processor faults.
   
4. Include one of the following options: a manual reset input (MAX6365), a watchdog timer function (MAX6366), a battery-on output (MAX6367), or an auxiliary user-adjustable reset input (MAX6368).

The MAX6365–MAX6368 operate from VCC supply voltages as low as 1.2V. The factory preset reset threshold voltages range from 2.32V to 4.63V (see Ordering Information in the full data sheet). In addition, each part is offered in three reset output versions: push-pull active low, open-drain active low, or open-drain active high (see Selector Guide in the full data sheet). The MAX6365–MAX6368 are available in miniature 8-pin SOT23 packages.

以下关键特性由Maxim美信半导体提供：

Low +1.2V Operating Supply Voltage (VCC or VBATT)

Precision Monitoring of +5.0, +3.3V, +3.0V, and +2.5V Power-Supply Voltages

On-Board Gating of Chip-Enable Signals, 1.5ns Propagation Delay

Debounced Manual Reset Input (MAX6365)

Watchdog Timer, 1.6s Timeout (MAX6366)

Battery-On Output Indicator (MAX6367)

Auxiliary User-Adjustable RESET IN (MAX6368)

Low 10µA Quiescent Supply Current

Three Available Output Structures

Push-Pull Active-Low RESET

Open-Drain Active-Low RESET

Open-Drain RESET

RESET/Active-Low RESET Valid Down to 1.2V Guaranteed

(VCC or VBATT)

Power-Supply Transient Immunity

150ms min Reset Timeout Period

Miniature 8-Pin SOT23 Package

计算机：台式机、工作站和服务器

笔记本电脑

掌上电脑

笔输入掌上电脑

便携式患者监视/药物传递

便携式测试仪

POS终端

打印机与传真机

可编程逻辑控制器

• MAX6734A - 单/双/三电压微处理器监控电路，带有独立的看门狗输出
• MAX6067A|MAX6067B - 高精度、微功耗、低压差、高输出电流、SOT23封装电压基准
• MAX24002 - 1.25Gbps至2.5Gbps SFP激光收发器
• MAX16946 - 远端天线、电流检测和LDO/开关
• MAX3237 - 3.0V至5.5V、低功耗、1Mbps、真RS-232收发器，使用四只0.1µF外部电容
• MAX6922 - 27/28/32路输出、76V、串行接口VFD管驱动器
• MAX9156 - 低抖动、低噪声、LVPECL至LVDS电平转换器，SC70封装
• MAX234 - +5V供电、多通道RS-232驱动器/接收器
• MAX3314E - ±15kV ESD保护、460kbps、1µA、RS-232兼容收发器
• MAX5410 - 双路、音量调节、对数数字电位器