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PT7M6834FD3TA3E

Description
Ultra Low Voltage Detectors
File Size378KB,12 Pages
ManufacturerPericom Semiconductor Corporation (Diodes Incorporated)
Websitehttps://www.diodes.com/
Download Datasheet View All

PT7M6834FD3TA3E Overview

Ultra Low Voltage Detectors

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PT7M6832-6840
Ultra Low Voltage Detectors
Features
Factory-Set Reset Threshold Voltages for Nominal
Supplies from 1.2V to 1.8V
Low power consumption : Typ 7.5μA
Five different timeout periods available: 70μs(voltage
detector), 1.5ms, 30ms, 210ms and 1.68s
Output configuration: Push-pull RESET , push-pull
RESET or open-drain RESET
Guaranteed reset valid to Vcc: 0.9V--active low,
0.85V--active high
Detect voltage accuracy:
1.5%
Adjustable threshold reset-in option
Immune to short negative Vcc transients
Small SOT23-3L, SC70-3L or SOT143-4L packages
Description
The PT7M6832–6840 are microprocessor (µ
P)
supervisory circuits used to monitor low-voltage power
supplies in µ and digital systems. They provide
P
excellent circuit reliability and low cost by eliminating
external components and adjustments when used with
+1.2V to +1.8V powered circuits.
These devices assert a reset signal whenever the VCC
supply voltage declines below a preset threshold or
whenever manual reset (MR) is asserted. Reset remains
asserted for a fixed timeout delay after VCC has risen
above the reset threshold or when manual reset is
deasserted. Five different timeout periods are available:
70µ (voltage detector), 1.5ms, 30ms, 210ms, and 1.68s.
s
Reset thresholds suitable for operation with a variety of
supply voltages are available.
The PT7M6832/PT7M6835/PT7M6838 have a push-
pull active-low reset output (RESET). The PT7M6833/
PT7M6836/PT7M6839 have a push-pull active-high
reset output (RESET) and the PT7M 6834/ PT7M 6837/
PT7M 6840 have an open-drain active-low reset output
(RESET). The open-drain active-low reset output
requires a pull-up resistor that can be connected to a
voltage higher than VCC.
The PT7M6835/PT7M6836/PT7M6837 feature a
debounced manual reset input (MR), while the
PT7M6838/PT7M6839/PT7M6840 provide a RESET-
IN input allowing the user to externally adjust the reset
threshold. The reset comparator is designed to ignore
fast transients on VCC.
Low supply current of 7.5µ makes the PT7M6832–
A
PT7M6840 ideal for use in portable equipment. These
devices are available in 3-pin SOT23 or 4-pin SOT143
packages.
Pad Configuration
PT7M6832
PT7M6833
PT7M6834
1
GND
1
PT7M6832
PT7M6833
PT7M6834
GND
VCC
3
VCC
3
2
RESET (RESET)
2
RESET (RESET)
SOT23-3L
() is for PT7M6833
SC70-3L
() is for PT7M6833
PT7M6835
PT7M6836
PT7M6837
1
GND
RESET
(RESET)
4
1
PT7M6838
PT7M6839
PT7M6840
GND
RESET
(RESET)
4
Applications
Computers
Controllers
Intelligent Instruments
Critical μP and μC Power Monitoring
Portable/Battery-Powered Equipment
2
VCC
MR
3
2
VCC
RESET-IN
3
SOT143-4L
() is for PT7M6836
SOT143-4L
() is for PT7M6839
2013-11-0003
1
PT0236-6
11/18/13
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