HT70XX
Voltage Detector
Selection Table
Part No.
Detectable Voltage
Hysteresis Width
Tolerance
HT7024A
2.4V
0.12V
5%
HT7027A
2.7V
0.135V
5%
HT7033A
3.3V
0.165V
5%
HT7039A
3.9V
0.195V
5%
HT7044A
4.4V
0.22V
5%
HT7050A
5V
0.25V
5%
HT7070A
7V
0.35V
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
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).
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-volatileRAMsignalstorageprotectors
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