ne56604-42d NXP Semiconductors, ne56604-42d Datasheet - Page 2

• Manufacturer Part Number: ne56604-42d
• Description: System Reset With Built-in Watchdog Timer
• Manufacturer: NXP Semiconductors

Philips Semiconductors
GENERAL DESCRIPTION
The NE56604-42 is designed to generate a reset signal at a
threshold voltage of 4.2 V for a variety of microprocessor and logic
systems. Accurate reset signals are generated during momentary
power interruptions, or whenever power supply voltages sag to
intolerable levels. The NE56604-42 has a built-in Watchdog Timer to
monitor the microprocessor and ensure it is operating properly. Any
abnormal system operations due to microprocessor malfunctions
are terminated by a system reset generated by the Watchdog. The
NE56604-42 has a Watchdog monitoring time of 100 ms (typical).
The NE56604-42 is offered in the SO8 surface mount package
(SOP005).
FEATURES
APPLICATIONS
SIMPLIFIED SYSTEM DIAGRAM
2003 Oct 15
Both positive and negative logic reset output signals are available
Accurate threshold detection
Internal power-on reset delay
Internal Watchdog timer programmable with external resistor
Watchdog monitoring time of 100 ms (typical)
Reset assertion with V
Few external components required.
Microcomputer systems
Logic systems.
System reset with built-in Watchdog timer
CC
C
down to 0.8 V
V
S
7
V
5
CC
R
R
DC
NE56604-42
(typical)
4 GND
V
REF
R
CT
Figure 1. Simplified system diagram.
6 R
WATCHDOG TIMER
PROGRAMMABLE
CT
GENERATOR
1 C
2
RESET
T
8
2
3
RESET
RESET
CLK
RESET
RESET
CLK
SYSTEM
LOGIC
GND
SL01281
NE56604-42
Product data