HOLTEK HT7082A-2

HT70xxA-2
TinyPowerTM Voltage Detector
Features
· Low power consumption
· Output voltage accuracy: tolerance ± 1%
· Low temperature coefficient
· Built-in hysteresis characteristic
· High input voltage range (up to 24V)
· TO92, SOT89 and SOT23-5 package
Applications
· Battery checkers
· Microcomputer reset
· Level selectors
· Battery memory backup
· Power failure detectors
· Non-volatile RAM signal storage protectors
General Description
The HT70xxA-2 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
Detectable
Voltage
Hysteresis
Width
HT7022A-2
2.2V
0.110V
HT7024A-2
2.4V
0.120V
HT7027A-2
2.7V
0.135V
HT7033A-2
3.3V
0.165V
HT7039A-2
3.9V
0.195V
HT7044A-2
4.4V
0.220V
HT7050A-2
5.0V
0.250V
HT7082A-2
8.2V
0.410V
Part No.
Note:
Tolerance
±1%
Package
TO92
SOT89
SOT23-5
Marking
70xxA-2 (for TO92)
70xxA-2# (for SOT89)
70xxA-2+ (for SOT89)
xxA2+ (for SOT23-5)
²XX² stands for output voltages.
Both lead free and green compound devices are available.
²#² stands for lead free devices. For the TO-92 package, there will be a ²#² mark at the end of the date code.
²+² stands for green compound devices, which are Lead-free and Halogen-free.
For the TO-92 package, there will be a ²+² mark at the end of the date code.
Rev. 1.00
1
February 10, 2012
HT70xxA-2
Block Diagram
N Channel Open Drain Output (Normal Open; Active Low)
V O U T
V D D
V R E F
G N D
Output Table & Curve
V
VDD
VDD>VDET(+)
VDD£VDET(-)
VOUT
Hi-Z
VSS
O U T
D a s h lin e ... V
S o lid lin e ... V
V
V
D E T
V
D E T
´ 1 .0 5
V
IN
IN
fro m L
fro m H
O
I
®
®
L
H
I
O
IN
H Y S
Pin Assignment
T O 9 2
S O T 2 3 -5
S O T 8 9
N C
N C
F r o n t V ie w
T o p V ie w
O U T
O U T V D D
V D D
V S S
O U T
V D D
V S S
O U T
V D D
V S S
V S S
S id e V ie w
O U T
Rev. 1.00
V D D
V S S
2
February 10, 2012
HT70xxA-2
Absolute Maximum Ratings
Supply Voltage .............................................................................................................................VSS-0.3V to VSS+26V
Output Voltage ...........................VSS-0.3V to VDD+0.3V
Output Current......................................................50mA
Storage Temperature ............................-50°C to 125°C
Power Consumption ..........................................200mW
Operating Temperature ...........................-40°C to 85°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum 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.
Electrical Characteristics
HT7022A-2
Symbol
Ta=25°C
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
2.178
2.200
2.222
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.10
VDET
V
IDD
Operating Current
8V
¾
4
7
mA
VDD
Operating Voltage
¾
2.1
¾
24
V
IOL
Output Sink Current
2V
VOUT=0.2V
0.5
1.0
¾
mA
Temperature Coefficient
¾
-40°C<Ta<85°C
¾
±100
¾
ppm
D V D
D T
E T
a
No load
¾
HT7024A-2
Symbol
Ta=25°C
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
2.376
2.400
2.424
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.10
VDET
V
IDD
Operating Current
8V
¾
4
7
mA
VDD
Operating Voltage
¾
2.1
¾
24
V
IOL
Output Sink Current
2V
VOUT=0.2V
0.5
1.0
¾
mA
Temperature Coefficient
¾
-40°C<Ta<85°C
¾
±100
¾
ppm
D V D
D T
E T
a
Rev. 1.00
No load
¾
3
February 10, 2012
HT70xxA-2
HT7027A-2
Symbol
Ta=25°C
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
2.673
2.700
2.727
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.10
VDET
V
IDD
Operating Current
8V
¾
4
7
mA
VDD
Operating Voltage
¾
2.1
¾
24
V
IOL
Output Sink Current
2V
VOUT=0.2V
0.5
1.0
¾
mA
Temperature Coefficient
¾
-40°C<Ta<85°C
¾
±100
¾
ppm
D V D
D T
E T
a
No load
¾
HT7033A-2
Symbol
Ta=25°C
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
3.267
3.300
3.333
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.10
VDET
V
IDD
Operating Current
8V
¾
4
7
mA
VDD
Operating Voltage
¾
2.1
¾
24
V
IOL
Output Sink Current
VOUT=0.25V
1.2
2.5
¾
mA
-40°C<Ta<85°C
¾
±100
¾
ppm
D V D
D T
E T
a
Temperature Coefficient
No load
¾
2.5V
¾
HT7039A-2
Symbol
Ta=25°C
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
3.861
3.900
3.939
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.10
VDET
V
IDD
Operating Current
8V
¾
4
7
mA
VDD
Operating Voltage
¾
2.1
¾
24
V
IOL
Output Sink Current
VOUT=0.25V
1.2
2.5
¾
mA
-40°C<Ta<85°C
¾
±100
¾
ppm
D V D
D T
E T
a
Rev. 1.00
Temperature Coefficient
2.5V
¾
No load
¾
4
February 10, 2012
HT70xxA-2
HT7044A-2
Symbol
Ta=25°C
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
4.356
4.400
4.444
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.10
VDET
V
IDD
Operating Current
8V
¾
4
7
mA
VDD
Operating Voltage
¾
2.1
¾
24
V
IOL
Output Sink Current
VOUT=0.36V
3
6
¾
mA
-40°C<Ta<85°C
¾
±100
¾
ppm
D V D
D T
E T
a
Temperature Coefficient
No load
¾
3.6V
¾
HT7050A-2
Symbol
Ta=25°C
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
4.950
5.000
5.050
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.10
VDET
V
IDD
Operating Current
8V
¾
4
7
mA
VDD
Operating Voltage
¾
2.1
¾
24
V
IOL
Output Sink Current
VOUT=0.36V
3
6
¾
mA
-40°C<Ta<85°C
¾
±100
¾
ppm
D V D
D T
E T
a
Temperature Coefficient
No load
¾
3.6V
¾
HT7082A-2
Symbol
Ta=25°C
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
8.118
8.200
8.282
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.10
VDET
V
IDD
Operating Current
9.2V
¾
4
7
mA
VDD
Operating Voltage
¾
2.1
¾
24
V
IOL
Output Sink Current
VOUT=0.36V
3
6
¾
mA
-40°C<Ta<85°C
¾
±100
¾
ppm
D V D
D T
E T
a
Rev. 1.00
Temperature Coefficient
3.6V
¾
No load
¾
5
February 10, 2012
HT70xxA-2
Functional Description
The HT70xxA-2 series is a set of voltage detectors
equipped with a high stability voltage reference which is
connected to the negative input of a comparator¾
denoted as VREF in the following figure for NMOS output
voltage detector.
The hysteresis width is:
VHYS = VDET (+) - VDET (-)
V
R
When the voltage drop to the positive input of the
comparator (i,e,VB) is higher than VREF, VOUT goes
high, M1 turns off, and VB is expressed as VBH=VDD ´
(RB+RC) / (RA+RB+RC). If VDD is decreased so that VB
falls to a value less than VREF, the comparator output
inverts from high to low, VOUT goes low, VC is high, M1
turns on, RC is bypassed, and VB becomes: VBL= VDD ´
RB / (RA+RB), which is less than VBH. By so doing, the
comparator output will stay low to prevent the circuit
from oscillating when VB » VREF.
V
V
R E F
R
R L
V
B
C
V
O U T
M N
B
M 1
R
C
V
S S
NMOS Output Voltage Detector
The figure demonstrates the NMOS output type with
positive output polarity (VOUT is normally open, active
low). The HT70xxA-2 series also supplies options for
other output types with active high outputs. Application
circuits shown are examples of positive output polarity
(normally open, active low) unless otherwise specified.
The detectable voltage is defined as:
RA + RB + RC
´ VREF
RB + RC
The release voltage is defined as:
RA + RB
´ VREF
VDET (+) =
RB
Rev. 1.00
A
C o m p a ra to r
If VDD falls below the minimum operating voltage, the
output becomes undefined. When VDD goes from low to
VDD ´ RB / (RA+RB) > VREF, the comparator output and
VOUT goes high.
VDET (-) =
D D
6
February 10, 2012
HT70xxA-2
Application Circuits
Microcomputer Reset Circuit
Power-on Reset Circuit
Normally a reset circuit is required to protect the
microcomputer system from malfunctions due to power
line interruptions. The following examples show how
different output configurations perform a reset function
in various systems.
With several external components, the NMOS open
drain type of the HT70xxA-2 series can be used to
perform a power-on reset function as shown:
V
IN
R
· NMOS open drain output application for separate
D
power supply
V
V
D D 1
V
H T 7 0 X X A -2
V
D D 2
D D
V
C
O U T
R E S E T
M ic r o C o m p u te r
O U T
V
O U T
V
S S
H T 7 0 X X A -2
V
S S
V
V
D D
S S
· NMOS open drain output application with R-C delay
V
D D
R
H T 7 0 X X A -2
V
O U T
t
M ic r o C o m p u te r
V
O U T
C
V
S S
t
5V Power Line Monitoring Circuit
Generally, a minimum operating voltage of 4.5V is
guaranteed in a 5V power line system. The HT7044A-2
is recommended for use as 5V power line monitoring
circuit.
· 5V power line monitor with power-on reset
5 V P o w e r lin e
R
D
V
D D
C
V
O U T
H T 7 0 4 4 A -2
V
Rev. 1.00
7
S S
V
S S
February 10, 2012
HT70xxA-2
· with 5V voltage regulator
Malfunction Analysis
The following circuit demonstrates the way a circuit
analyzes malfunctions by monitoring the variation or
spike noise of power supply voltage.
5 V V o lta g e r e g u la to r
V
5 V
H T 7 1 5 0 -1
IN
V
D D
V
S S
G N D
V
D D
V
V
H T 7 0 X X A -2
H T 7 0 4 4 A -2
V
V
S S
S S
Charge Monitoring Circuit
Change of Detectable Voltage
The following circuit shows a charged monitor for
p r o t e ct i o n a g a i n st b a t t e r y d e t e r i o r a t i o n b y
overcharging. When the voltage of the battery is higher
than the set detectable voltage, the transistor turns on to
bypass the charge current, protecting the battery from
overcharging.
If the required voltage is not found in the standard
product selection table, it is possible to change it by
using external resistance dividers or diodes.
· Varying the detectable voltage with a resistance di-
vider
V
O U T
O U T
IN
R
V
R
V
V
A
D D
V
O U T
V
S S
S o la r
C e ll
V
O U T
D D
B A T T
T r
L o a d
H T 7 0 X X A -2
B
S S
V
S S
H T 7 0 X X A -2
RA + RB
´ VDET
RB
RA + RB
Hysteresis width =
´ VHYS
RB
Detectable voltage =
· Varying the detectable voltage with a diode
V
IN
V f1
V f2
V
D D
V
O U T
H T 7 0 X X A -2
V
V
S S
S S
Detectable Voltage = Vf1+Vf2+VDET
Rev. 1.00
8
February 10, 2012
HT70xxA-2
Level Selector
The following diagram illustrates a logic level selector.
V
D D
V
V
S S
V
8 .2 V
V
D E T 1
5 .0 V
V
D E T 2
V
O U T
H T 7 0 5 0 A -2
H T 7 0 8 2 A -2
V
V
D E T 2
V
O U T
O U T
D E T 1
D D
t
V
O U T
t
Rev. 1.00
9
February 10, 2012
HT70xxA-2
Package Information
Note that the package information provided here is for consultation purposes only. As this information may be updated at regular
intervals users are reminded to consult the Holtek website (http://www.holtek.com.tw/english/literature/package.pdf) for the
latest version of the package information.
3-pin TO92 Outline Dimensions
A
B
D
C
E
F
G
H
Symbol
Nom.
Max.
A
0.170
¾
0.200
B
0.170
¾
0.200
C
0.500
¾
¾
D
0.011
¾
0.020
E
0.090
¾
0.110
F
0.045
¾
0.055
G
0.045
¾
0.065
H
0.130
¾
0.160
a
0°
¾
10°
Symbol
Rev. 1.00
Dimensions in inch
Min.
Dimensions in mm
Min.
Nom.
Max.
A
4.32
¾
5.08
B
4.32
¾
5.08
C
12.70
¾
¾
D
0.28
¾
0.51
E
2.29
¾
2.79
F
1.14
¾
1.40
G
1.14
¾
1.65
H
3.30
¾
4.06
a
0°
¾
10°
10
February 10, 2012
HT70xxA-2
3-pin SOT89 Outline Dimensions
I
A
J
B
C
E
D
G
F
Symbol
Dimensions in inch
Min.
Nom.
Max.
A
0.173
¾
0.181
B
0.059
¾
0.072
C
0.090
¾
0.102
D
0.035
¾
0.047
E
0.155
¾
0.167
F
0.014
¾
0.019
G
0.017
¾
0.022
H
¾
0.059
¾
I
55
¾
63
J
14
¾
17
Symbol
A
Rev. 1.00
H
Dimensions in mm
Min.
Nom.
Max.
4.39
¾
4.60
B
1.50
¾
1.83
C
2.29
¾
2.59
D
0.89
¾
1.19
E
3.94
¾
4.24
F
0.36
¾
0.48
G
0.43
¾
0.56
H
¾
1.50
¾
I
1.40
¾
1.60
J
0.36
¾
0.43
11
February 10, 2012
HT70xxA-2
5-pin SOT23-5 Outline Dimensions
D
C
L
H
E
q
e
A
A 2
b
Symbol
Dimensions in inch
Min.
Nom.
Max.
0.039
¾
0.051
A1
¾
¾
0.004
A2
0.028
¾
0.035
A
b
0.014
¾
0.020
C
0.004
¾
0.010
D
0.106
¾
0.122
E
0.055
¾
0.071
e
¾
0.075
¾
H
0.102
¾
0.118
L
0.015
¾
¾
q
0°
¾
9°
Symbol
Rev. 1.00
A 1
Dimensions in mm
Min.
Nom.
Max.
A
1.00
¾
1.30
A1
¾
¾
0.10
A2
0.70
¾
0.90
b
0.35
¾
0.50
C
0.10
¾
0.25
D
2.70
¾
3.10
E
1.40
¾
1.80
e
¾
1.90
¾
H
2.60
¾
3.0
L
0.37
¾
¾
q
0°
¾
9°
12
February 10, 2012
HT70xxA-2
Product Tape and Reel Specifications
TO92 Reel Dimensions (Unit: mm)
P a c k a g e U p ,
F la t S id e U p
3 0
P a c k a g e U p ,
F la t S id e D o w n
4 3
5 8
8 8
3 6 0
Rev. 1.00
13
February 10, 2012
HT70xxA-2
Reel Dimensions
D
T 2
A
C
B
T 1
SOT89-3
Symbol
Description
Dimensions in mm
A
Reel Outer Diameter
180.0±1.0
B
Reel Inner Diameter
62.0±1.5
C
Spindle Hole Diameter
12.75
+0.15/-0.00
D
Key Slit Width
T1
Space Between Flange
12.4
+0.2/-0.0
T2
Reel Thickness
17.0
+0.0/-0.4
1.90±0.15
SOT23-5
Symbol
Description
Dimensions in mm
A
Reel Outer Diameter
178.0±1.0
B
Reel Inner Diameter
62.0±1.0
C
Spindle Hole Diameter
13.0±0.2
D
Key Slit Width
2.50±0.25
T1
Space Between Flange
8.4
T2
Reel Thickness
11.4
Rev. 1.00
14
+1.5/-0.0
+1.5/-0.0
February 10, 2012
HT70xxA-2
Carrier Tape Dimensions
P
D h
W 2
H 1
H
H 0
l1
W 0
t
W 1
W
F 1
F 2
D 0
P 2
P 0
TO92
Symbol
Note:
Description
Dimensions in mm
I1
Taped Lead Length
(2.5)
P
Component Pitch
12.7±1.0
P0
Perforation Pitch
12.7±0.3
P2
Component to Perforation (Length Direction)
6.35±0.40
F1
Lead Spread
2.5
+0.4/-0.1
F2
Lead Spread
2.5
+0.4/-0.1
Dh
Component Alignment
W
Carrier Tape Width
W0
Hold-down Tape Width
6.0±0.5
W1
Perforation Position
9.0±0.5
W2
Hold-down Tape Position
H0
Lead Clinch Height
16.0±0.5
H1
Component Height
Less than 24.7
D0
Perforation Diameter
4.0±0.2
t
Taped Lead Thickness
0.7±0.2
H
Component Base Height
19.0±0.5
0.0±0.1
18.0
+1.0/-0.5
(0.5)
Thickness less than 0.38±0.05mm~0.5mm
P0 Accumulated pitch tolerance: ±1mm/20pitches.
( ) Bracketed figures are for consultation only
Rev. 1.00
15
February 10, 2012
HT70xxA-2
Carrier Tape Dimensions
P 0
D
P 1
t
E
F
W
C
D 1
B 0
P
K 0
A 0
R e e l H o le
IC
M a r k in g
SOT89-3
Symbol
Description
Dimensions in mm
12.0
+0.3/-0.1
W
Carrier Tape Width
P
Cavity Pitch
E
Perforation Position
1.75±0.10
F
Cavity to Perforation (Width Direction)
5.50±0.05
D
Perforation Diameter
1.5
+0.1/-0.0
D1
Cavity Hole Diameter
1.5
+0.1/-0.0
P0
Perforation Pitch
4.0±0.1
P1
Cavity to Perforation (Length Direction)
2.0±0.1
A0
Cavity Length
4.8±0.1
B0
Cavity Width
4.5±0.1
K0
Cavity Depth
1.8±0.1
8.0±0.1
t
Carrier Tape Thickness
C
Cover Tape Width
0.300±0.013
9.3±0.1
SOT23-5
Symbol
Description
W
Carrier Tape Width
P
Cavity Pitch
E
Perforation Position
Dimensions in mm
8.0±0.3
4.0±0.1
1.75±0.10
F
Cavity to Perforation (Width Direction)
3.50±0.05
D
Perforation Diameter
1.5
+0.1/-0.0
D1
Cavity Hole Diameter
1.5
+0.1/-0.0
P0
Perforation Pitch
P1
Cavity to Perforation (Length Direction)
2.00±0.05
A0
Cavity Length
3.15±0.10
B0
Cavity Width
3.2±0.1
K0
Cavity Depth
1.4±0.1
t
Carrier Tape Thickness
C
Cover Tape Width
Rev. 1.00
4.0±0.1
0.20±0.03
5.3±0.1
16
February 10, 2012
HT70xxA-2
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. (Shenzhen Sales Office)
5F, Unit A, Productivity Building, No.5 Gaoxin M 2nd Road, Nanshan District, Shenzhen, China 518057
Tel: 86-755-8616-9908, 86-755-8616-9308
Fax: 86-755-8616-9722
Holtek Semiconductor (USA), Inc. (North America Sales Office)
46729 Fremont Blvd., Fremont, CA 94538, USA
Tel: 1-510-252-9880
Fax: 1-510-252-9885
http://www.holtek.com
Copyright Ó 2012 by HOLTEK SEMICONDUCTOR INC.
The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes 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. 1.00
17
February 10, 2012