HT7022A Datasheet, PDF (1/12 Pages) Holtek Semiconductor Inc – 2.2V Voltage Detector

HT7022A
2.2V Voltage Detector
Features
· Low detectable voltage 2.2V
· Low power consumption
· Low temperature coefficient
· Built-in high-stability reference source
· Built-in hysteresis characteristic
· TO-92 and SOT-89 package
Applications
· Battery checkers
· Power failure detectors
· Microcomputer reset
· Battery memory backup
· Non-volatile RAM signal storage protectors
General Description
The HT7022A is a three-terminal low power voltage de-
tector implemented in CMOS technology. It detects a
particular fixed voltage 2.2V. The voltage detector con-
sists of a high-precision and low power consumption
standard voltage source, a comparator, hysteresis cir-
cuit, 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 (NMOS open
drain type only).
Output Type Selection Table
Type
V_OUT
V_DD
A
V_DD>V_DET(+)
Hi-Z
V_DD£V_DET(-)
VSS
Rev. 1.10
1
April 20, 2004