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HT7022A Schematic ( Datenblatt PDF ) - Holtek Semiconductor

Teilenummer HT7022A
Beschreibung 2.2V Voltage Detector
Hersteller Holtek Semiconductor
Logo Holtek Semiconductor Logo 



Gesamt 12 Seiten
		
HT7022A Datasheet, Funktion
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
VOUT
VDD
A
VDD>VDET(+)
Hi-Z
VDD£VDET(-)
VSS
Rev. 1.10
1 April 20, 2004






HT7022A Datasheet, Funktion
Package Information
3-pin TO-92 Outline Dimensions
B
A
C
E
F
D
G
H
Symbol
A
B
C
D
E
F
G
H
I
a
Min.
170
170
500
11
90
45
45
130
8
4°
Dimensions in mil
Nom.
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
HT7022A
Max.
200
200
¾
20
110
55
65
160
18
6°
Rev. 1.10
6 April 20, 2004

6 Page







HT7022A pdf, datenblatt
HT7022A
Holtek Semiconductor Inc. (Headquarters)
No.3, Creation Rd. II, Science Park, Hsinchu, Taiwan
Tel: 886-3-563-1999
Fax: 886-3-563-1189
http://www.holtek.com.tw
Holtek Semiconductor Inc. (Taipei Sales Office)
4F-2, No. 3-2, YuanQu St., Nankang Software Park, Taipei 115, Taiwan
Tel: 886-2-2655-7070
Fax: 886-2-2655-7373
Fax: 886-2-2655-7383 (International sales hotline)
Holtek Semiconductor Inc. (Shanghai Sales Office)
7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China 200233
Tel: 021-6485-5560
Fax: 021-6485-0313
http://www.holtek.com.cn
Holtek Semiconductor Inc. (Shenzhen Sales Office)
43F, SEG Plaza, Shen Nan Zhong Road, Shenzhen, China 518031
Tel: 0755-8346-5589
Fax: 0755-8346-5590
ISDN: 0755-8346-5591
Holtek Semiconductor Inc. (Beijing Sales Office)
Suite 1721, Jinyu Tower, A129 West Xuan Wu Men Street, Xicheng District, Beijing, China 100031
Tel: 010-6641-0030, 6641-7751, 6641-7752
Fax: 010-6641-0125
Holmate Semiconductor, Inc. (North America Sales Office)
46712 Fremont Blvd., Fremont, CA 94538
Tel: 510-252-9880
Fax: 510-252-9885
http://www.holmate.com
Copyright Ó 2004 by HOLTEK SEMICONDUCTOR INC.
The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek as-
sumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used
solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable
without further modification, nor recommends the use of its products for application that may present a risk to human life
due to malfunction or otherwise. Holtek¢s products are not authorized for use as critical components in life support devices
or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information,
please visit our web site at http://www.holtek.com.tw.
Rev. 1.10
12 April 20, 2004

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