AP1704

Features:

- Precision Monitoring of +3V, +3.3V, and +5V Power-Supply Voltages
- Fully Specified Over Temperature
- Available in Three Output Configurations
- Push-Pull RESET Low Output (AP1701/3)
- Push-Pull RESET High Output (AP1702/4)
- 140ms min Power-On Reset Pulse Width
- 12A Supply Current
- Guaranteed Reset Valid to VCC = +1V
- Power Supply Transient Immunity
- No External Components
- 3-pin SOT23 package


Application

- Computers
- Controllers
- Intelligent Instruments
- Critical P and C Power Monitoring
- Portable/Battery Powered Equipment
- Automotive


Pinout




Specifications

Symbol	Parameter	Rating	Unit
VCC	Terminal Voltage (with respect to GND)	-0.3 to +6.0	V
VRESET	RESET, RESET (push-pull)	-0.3 to (VCC + 0.3)	V
ICC	Input Current, VCC	20	mA
IO	Output Current, RESET, RESET	20	mA
VR	Rate of Rise, VCC	100	V/S
PD	Continuous Power Dissipation (TA = +70°C), de-rate 4mW/°C above +70°C	320	mW
TOP	Storage Temperature Range	-40 to +105	°C
TST	Storage Temperature Range	-65 to +150	°C
TLEAD	Lead Temperature (soldering, 10s)	+300	°C

Description

The AP1701/2/3/4 are used for microprocessor (P) supervisory circuits to monitor the power supplies in P and digital systems. They provide excellent circuit reliability and low cost by eliminating external components and djustments when used with +5V,+3.3V, +3.0V powered circuits.

These circuits perform a single function: they assert a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for at least 140ms after VCC has risen above the reset threshold. Reset thresholds suitable for operation with a variety of supply voltages are available. The AP1701/2/3/4 have push pull outputs. The AP1701/3 have an active low RESET output, while the AP1702/4 has an active high RESET output. The reset comparator is designed to ignore fast transients on VCC, and the outputs are guaranteed to be in the correct logic state for VCC down to 1V. Low supply current makes the AP1701/2/3/4 ideal for use in portable equipment. The AP1701/2/3/4 is available in a 3-pin SOT23 package.