Holtek Semiconductor Inc HT7024A, HT7027A, HT7033A, HT7039A, HT7044A Datasheet
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Features
Low power consumption
·
Low temperature coefficient
·
Built-in high-stability reference source
·
Applications
Battery checkers
·
Level selectors
·
Power failure detectors
·
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
HT70XX
Voltage Detector
Built-in hysteresis characteristic
·
TO-92 & SOT-89 package
·
Microcomputer reset
·
Battery memory backup
·
Non-volatile RAM signal storage protectors
·
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).
-
-
-
-
Selection Table
Part No. Detectable Voltage Hysteresis Width Tolerance
HT7024A
HT7027A
HT7033A
HT7039A
HT7044A
HT7050A
HT7070A
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
2.4V 0.12V
2.7V 0.135V
3.3V 0.165V
3.9V 0.195V
4.4V 0.22V
5V 0.25V
7V 0.35V
1 May 3, 2000
±5%
±5%
±5%
±5%
±5%
±5%
±5%
Output type selection table
V
Type V
DD
OUT
VDD>V
DET
A Hi-Z VSS
Block Diagram
N channel open drain output (normal open; active low)
(+) VDD£V
DET
(-)
HT70XX
A type
VDD
GND
VOUT
V
REF
V
OUT
V
DET
V
HYS
V
IN
2 May 3, 2000
Pin Assignment Pad Assignment
HT70XX
TO -92
HT70XX
OUTVDD VSS
Front V iew
B o tto m V ie w
SO T-89
OUT VDD VSS
Pad Coordinates
Pad No. X Y
1
2
-483.30 -379.50
-234.60 -399.50
3 443.90
Absolute Maximum Ratings
Unit: mm
-386.00
(0 ,0 )
1
2
VOUT
VIN
Chip size: 1317 ´ 1158 (mm)
3
GND
2
* The IC substrate should be connected to VDD in
the PCB layout artwork.
Supply Voltage...............................-0.3V to 26V Output Current.........................................50mA
Output Voltage ..............V
Power Consumption...............................200mW
-0.3V to VDD+0.3V
SS
Storage Temperature.................-50°Cto125°C
Operating Temperature ..................0°Cto70°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maxi-
mum Ratings² may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged
exposure to extreme conditions may affect device reliability.
3 May 3, 2000
Electrical Characteristics
HT70XX
HT7024A
Symbol Parameter
V
V
I
V
I
DDV
DET
HYS
DD
DD
OL
DET
Hi®Lo Detectable Voltage ¾¾
Lo®Hi Detectable Voltage ¾¾
Hysteresis Width
Operating Current 8 No load
Operating Voltage
Output Sink Current 2
Temperature Coefficient
T
A
HT7027A
Symbol Parameter
V
V
I
V
I
DDV
DET
HYS
DD
DD
OL
DET
Hi®Lo Detectable Voltage ¾¾
Lo®Hi Detectable Voltage ¾¾
Hysteresis Width
Operating Current 8 No load
Operating Voltage
Output Sink Current 2
Temperature Coefficient
T
A
Ta=25°C
Test Conditions
Min. Typ. Max. Unit
V
DD
Conditions
2.28 2.4 2.52 V
2.325 2.52 2.772 V
¾¾
¾¾
V
=0.2V
OUT
0.02
V
DET
¾
1.5
0.5 1
0.05
V
DET
47
¾
0.1
V
DET
24 V
¾
mA
mA
¾ 0°C<Ta<70°C ¾±0.9 ¾ mV/°C
Ta=25°C
Test Conditions
Min. Typ. Max. Unit
V
DD
Conditions
2.565 2.7 2.835 V
2.616 2.835 3.118 V
¾¾
¾¾
V
=0.2V
OUT
0.02
V
DET
¾
1.5
0.5 1
0.05
V
DET
47
¾
0.1
V
DET
24 V
¾
mA
mA
¾ 0°C<Ta<70°C ¾±0.9 ¾ mV/°C
V
V
4 May 3, 2000
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