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부품번호 | 83C293 기능 |
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기능 | VOLTAGE MONITORS | ||
제조업체 | Unisonic Technologies | ||
로고 | |||
UNISONIC TECHNOLOGIES CO., LTD
83CXXX
Preliminary
4-PIN µP VOLTAGE MONITORS
WITH MANUAL RESET INPUT
DESCRIPTION
The UTC 83CXXX is a microprocessor supervisory circuit. It has
an active-low RESET and push-pull outputs. The circuit can assert
a reset signal as long as the VCC power supplies voltage dropping
below a preset threshold and it keep the reset signal for at least
140ms when VCC has risen above the reset threshold. The reset
threshold can be operated with multi-supply voltages.
The UTC 83CXXX provides the circuit with perfect reliability and
low cost through eliminating external components and adjustments
when applied with +5V, +3.3V, +3.0V power supply The UTC
83CXXX also provide a de-bounced manual reset input.
The reset comparator can work despite of fast transients on VCC,
and the outputs are guaranteed to be in the right logic state while
VCC is down to 1V.
In applications, the UTC 83CXXX is suitable for computers,
intelligent instruments, controllers, critical microprocessor and
microcomputer power monitors, portable or battery-powered
equipment, automotive.
FEATURES
* +3V, +3.3V, and +5V power-supply voltages
* Full temperature rated
* Supply current: 5µA
* Available in configuration: push-pull RESET output
* 140ms minimum power-on reset pulse width
* Guaranteed reset to VCC = +1V
* Power supply transient Immunity
* Eliminating external components
* Manual reset input
ORDERING INFORMATION
Ordering Number
83CXXXG-AD4-R
Note: XXX: Output Voltage, refer to Marking Information.
Package
SOT-143
CMOS IC
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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QW-R502-353.c
83CXXX
Preliminary
CMOS IC
DETAILED DESCRIPTION
The UTC 83CXXX have a push-pull output stage. A microprocessor’s (µP’s) reset input initiates the
microprocessor in a known state. The UTC 83CXXX assert a reset signal as long as the VCC power supply voltage
drops below a preset threshold. When VCC has risen over the reset threshold, the devices keep the signal for at least
140ms. They have a function of preventing code-execution errors during power-up, power-down, or brownout
conditions by resetting.
See the manual reset input section if you want to see function that the manual reset input ( MR ) can initiate a
reset.
Manual Reset Input
Many products based on microprocessor need manual reset characteristic, allowing them to initiate a reset.
Reset keeps working while MR is low, and when MR returns high it is for the reset Active Timeout Period (tRP).
TTL or CMOS-logic levels, or with open-drain / collector outputs both can drive MR . MR will be started by a logic low
on manual reset .Because the input has a build-in 20kΩ pull-up resistor; it can be left open if it is not used. We can
put a 0.1µF capacitor from MR to ground if MR is driven from long cables or the device is used in a noisy
environment strengthening additional noise capacity. Connecting a normally open momentary switch from MR to
ground to create a manual-reset function, and external debounce circuitry is not required.
VCC
UTC
83CXXX
GND
RESET
R1=
100K
Figure 1. RESET Valid to VCC = Ground Circuit
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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부품번호 | 상세설명 및 기능 | 제조사 |
83C293 | VOLTAGE MONITORS | Unisonic Technologies |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |