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  Holtek Semiconductor Electronic Components Datasheet  

HT7044A-3 Datasheet

Voltage Detector

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Features
• Low power consumption
• Low temperature coefficient
• High input voltage range (up to 30V)
• Quiescent current 1μA
• Output voltage accuracy: tolerance ±2%
• Built-in hysteresis characteristic
• TO92, SOT89 and SOT23-5 package
Applications
• Battery checkers
• Level selectors
• Power failure detectors
• Microcomputer reset
• Battery memory backup
• Non-volatile RAM signal storage protectors
HT70xxA-3
TinyPowerTM Voltage Detector
General Description
The HT70xxA-3 series devices area 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
8.2V. The voltage detectors consist of a high-precision
and low power consumption standard voltage source
as well as a comparator, hysteresis circuit, and an
output driver. CMOS technology 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.
Selection Table
Part No.
Detectable
Voltage
HT7022A-3 2.2V
HT7024A-3 2.4V
HT7027A-3 2.7V
HT7033A-3 3.3V
HT7039A-3 3.9V
HT7044A-3 4.4V
HT7050A-3 5.0V
HT7082A-3 8.2V
Hysteresis
Width
0.110V
0.120V
0.135V
0.165V
0.195V
0.220V
0.250V
0.410V
Tolerance
±2%
Note: ″xx″ stands for detectable voltages.
Package
TO92
SOT89
SOT23-5
Marking
70xxA-3 (for TO92)
70xxA-3 (for SOT89)
xxA3 (for SOT23-5)
Rev. 1.20
1 May 16, 2016


  Holtek Semiconductor Electronic Components Datasheet  

HT7044A-3 Datasheet

Voltage Detector

No Preview Available !

Block Diagram
N Channel Open Drain Output (Normal Open; Active Low)
VDD
HT70xxA-3
VO UT
VR EF
GND
Output Table & Curve
V OUT
VDD
VOUT
VDD>VDET(+)
Hi-Z
VDD≤VDET(−)
VSS
V D E T V D E T ´ 1 .0 5
V HYS
D a s h lin e ... V IN fr o m L O ® H I
S o lid lin e ... V IN fr o m H I ® L O
V IN
Pin Assignment
TO 92
7 0 x x A -3
F r o n t V ie w
S O T89
7 0 x x A -3
O UT VDD VSS
S id e V ie w
Rev. 1.20
O UT VDD VSS
O UT VDD VSS
2
S O T 2 3 -5
NC
NC
x x A 3 T o p V ie w
O UT VDD VSS
O UT VDD VSS
May 16, 2016


Part Number HT7044A-3
Description Voltage Detector
Maker Holtek Semiconductor
Total Page 15 Pages
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