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  Holtek Semiconductor Electronic Components Datasheet  

HT7033A Datasheet

Voltage Detector

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HT7033A pdf
HT70XX
Voltage Detector
Features
· Low power consumption
· Low temperature coefficient
· Built-in high-stability reference source
· Built-in hysteresis characteristic
· TO-92 & SOT-89 package
Applications
· Battery checkers
· Level selectors
· Power failure detectors
· Microcomputer reset
· Battery memory backup
· Non-volatile RAM signal storage protectors
General Description
The HT70XX series is a set of three-terminal
low power voltage detectors implemented in
CMOS technology. Each voltage detector in the
series detects a particular fixed voltage ranging
from 2.4V to 7V. The voltage detectors consist of
a high-precision and low power consumption
standard voltage source, a comparator, hyster-
esis circuit, and an output driver. CMOS tech-
nology ensures low power consumption.
Although designed primarily as fixed voltage
detectors, these devices can be used with exter-
nal components to detect user specified thresh-
old voltages (NMOS open drain type only).
Selection Table
Part No.
HT7024A
HT7027A
HT7033A
HT7039A
HT7044A
HT7050A
HT7070A
Detectable Voltage
2.4V
2.7V
3.3V
3.9V
4.4V
5V
7V
Hysteresis Width
0.12V
0.135V
0.165V
0.195V
0.22V
0.25V
0.35V
Tolerance
±5%
±5%
±5%
±5%
±5%
±5%
±5%
Note: The output type selection codes are:
NMOS open drain normal open, active low
PMOS open drain normal open, active high
For example: The HT7070A is a 7V, NMOS open drain active low output
1 May 3, 2000


  Holtek Semiconductor Electronic Components Datasheet  

HT7033A Datasheet

Voltage Detector

No Preview Available !

HT7033A pdf
Output type selection table
Type
VOUT
A
VDD
VDD>VDET(+)
Hi-Z
Block Diagram
N channel open drain output (normal open; active low)
VDD
HT70XX
VDD£VDET(-)
VSS
VOUT
VREF
GND
A type
VOUT
VDET
VHYS
VIN
2 May 3, 2000


Part Number HT7033A
Description Voltage Detector
Maker Holtek Semiconductor Inc
Total Page 11 Pages
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