HA1835P - Hitachi Semiconductor

HA1835P Watchdog Timer

The HA1835P and HA1848P is a monolithic voltage regulator control designed for microcomputer systems. In addition to the voltage regulator, it include watchdog timer function and power-on reset function. These ICs can perform many function in various microcomputer systems with few external parts. Features • Regulated power supply control function  Wide are.

Features

• Regulated power supply control function  Wide area of operational voltage; V CC = 6 V to 30 V  Available external PNP-type transistor, suited to any system power supply  Built-in overcurrent limiter for external PNP-type transistor  Output voltage can be adjusted exactry in the range from 4 V to 6 V
• Watchdog timer  Internal bandpass filter control circuit (pulse width detect type) and reset signal oscillator  Fail-safe utility  Bandpass filter characteristics can be set by external resister (Rf) and capacitance (Cf)
• Automatic reset  Automatic power-on reset  Pulse generator char.