M59350FP Datasheet, PDF (1/9 Pages) Renesas Technology Corp – Watchdog Timer IC with Built-in 5 V Constant-Voltage Power Supply

M59350FP
Watchdog Timer IC
with Built-in 5 V Constant-Voltage Power Supply
REJ03F0016-0100Z
Rev.1.00
Aug.25.2003
Description
The M59350FP is an IC developed for use as a watchdog timer with a built-in 5 V constant-voltage power supply. It is
provided with functions for power-on reset, constant voltage monitoring, and watchdog timer operation, and can be
used as a power supply circuit for various systems. Because it employs a 15-pin flat package, it is ideal for compact
system designs.
Features
• Built-in power-on reset circuit
• Built-in 5 V constant-voltage power supply
• Built-in 5 V constant-voltage power supply monitoring circuit
• Built-in watchdog timer circuit
• Compact flat package (SOP, 14P2N, 1.27 mm pitch)
Application
• ECU power supply circuit for automotive use
• Other automotive applications
System Block Diagram
B COMP
VOAdj VO
IA d j
HA LT
VB
Constant-
current circuit
VREF
P-RUN
Internal rise
deray circuit:
400 µs
Internal fall
deray circuit:
10 µs
Watchdog circuit
(timer reset period)
(power-on reset)
Internal fall
deray circuit:
200 µs
C1
EN
C2
RESET
GND
Rev.1.00, Aug.25.2003, page 1 of 8