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HT70XX Datasheet

  • HT70XX

  • Voltage Detector

  • 16頁

  • HOLTEK

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HT70XX
Voltage Detector
Features
路
Low power consumption
路
Low temperature coefficient
路
Built-in high-stability reference source
路
Built-in hysteresis characteristic
路
TO-92 & SOT-89 package
Applications
路
Battery checkers
路
Level selectors
路
Power failure detectors
路
Microcomputer reset
路
Battery memory backup
路
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 2.2V to 7V. The voltage de-
tectors consist of a high-precision and low power con-
sumption standard voltage source, a comparator,
hysteresis circuit, and an output driver. CMOS technol-
ogy ensures low power consumption.
Although designed primarily as fixed voltage detectors,
these devices can be used with external components to
detect user specified threshold voltages (NMOS open
drain type only).
Selection Table
Part No.
HT7022A
HT7024A
HT7027A
HT7033A
HT7039A
HT7044A
HT7050A
HT7070A
Note:
Detectable Voltage
2.2V
2.4V
2.7V
3.3V
3.9V
4.4V
5.0V
7.0V
Hysteresis Width
0.11V
0.12V
0.135V
0.165V
0.195V
0.22V
0.25V
0.35V
Tolerance
鹵5%
鹵5%
鹵5%
鹵5%
鹵5%
鹵5%
鹵5%
鹵5%
The output type selection codes are:
NMOS open drain normal open, active low
For example: The HT7070A is a 7.0V, NMOS open drain active low output
Output type selection table
V
DD
Type
V
OUT
A
V
DD
>V
DET
(+)
Hi-Z
V
DD
攏V
DET
(-)
VSS
Rev. 1.60
1
January 14, 2003

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