Features:
Simultaneously Monitors 5V, 3.3V and
Adjustable Inputs
Guaranteed Threshold Accuracy: 0.75%
Low Supply Current: 100m A
Internal Reset Time Delay: 200ms
Manual Pushbutton Reset Input
Active Low and Active High Reset Outputs
Active Low "Soft" RESET Output
Power Supply Glitch Immunity
Guaranteed Reset for Either VCC3 + 1V or V CC5 1V
Meets PCI t FAIL Timing Specifications Rev 2.1
8-Pin SO and MSOP PackagesApplicationPCI-Based Systems
Desktop Computers
Notebook Computers
Intelligent Instruments
Portable Battery-Powered Equipment
Network ServersPinout
SpecificationsVCC3 , V CC5, V CCA..................................... 0.3V to 7V
RST, SRST ................................................... 0.3V to 7V
RST ................................................... 0.3V to V + 0.3V
CC3
PBR................................................................ 7V to 7V
LTC1536C ..................................................... 0 C to 70 C
LTC1536I....................................................40 C to 85 C
Storage Temperature Range................... 65 C to 150 C
Lead Temperature (Soldering, 10 sec).................... 300 C
Description
The LTC(R) 1536 is designed for PCI local bus applications with multiple supply voltages that require low power, small size, high speed and high accuracy supply monitoring.
For 3.3V and 5V supplies that are >500mV below spec or for the condition when the 5V supply falls below the 3.3V supply, the LTC1536 has a very fast response time capable of meeting the PCI TFAIL timing specification. Tight 0.75% threshold accuracy and glitch immunity ensure reliable reset operation without false triggering.
The RST output is guaranteed to be in the correct state for VCC5 or VCC3 down to 1V. The 100 A typical supply current makes the LTC1536 ideal for power-conscious systems. A manual pushbutton reset input provides the ability to generate a very narrow "soft" reset pulse (100m s typ) or a 200ms reset pulse equivalent to a power-on reset. Both SRST and RST outputs are open-drain and can be OR-tied with other reset sources.
LTC1536 Data Sheet
