HT70XXA-1 TinyPowerTM Voltage Detector

HT70XXA-1
TinyPowerTM Voltage Detector
Features
· Low power consumption
· Output voltage accuracy: tolerance ± 3%
· 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
comparator, hysteresis circuit, and an output driver.
CMOS technology ensures low power consumption.
The HT70XXA-1 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 5V. The
voltage detectors consist of a high-precision and low
power consumption standard voltage source as well as a
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
Tolerance
HT7022A-1
2.2V
0.11V
±3%
HT7024A-1
2.4V
0.12V
±3%
HT7027A-1
2.7V
0.135V
±3%
HT7033A-1
3.3V
0.165V
±3%
HT7039A-1
3.9V
0.195V
±3%
HT7044A-1
4.4V
0.22V
±3%
HT7050A-1
5.0V
0.25V
±3%
Part No.
Note:
Package
TO92
SOT89
SOT23-5
Marking
70XXA-1 (for TO92)
70XXA-1 (for SOT89)
0XXA (for SOT23-5)
²XX² stands for output voltages.
For lead free devices, TO92 package will add a ²#² mark at the end of the date code, whereas SOT89 &
SOT23-5 packages will add a ²#² mark at the end of the marking.
Rev. 1.50
1
September 30, 2008
HT70XXA-1
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
V
´ 1 .0 5
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 8 9
S O T 2 3 -5
N C
N C
F r o n t V ie w
7 0 X X A -1
7 0 X X A -1
T o p V ie w
0 X X A
O U T
O U T V D D
V S S
V S S
B o tto m
O U T
V D D
V S S
O U T
V D D
V S S
V ie w
O U T
Rev. 1.50
V D D
V D D
V S S
2
September 30, 2008
HT70XXA-1
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-1
Symbol
Ta=25°C
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
2.134
2.200
2.266
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.1
VDET
V
IDD
Operating Current
8V
¾
4
7
mA
VDD
Operating Voltage
¾
1.5
¾
24
V
IOL
Output Sink Current
2V
VOUT=0.2V
0.5
1
¾
mA
DVDET
DTa
Temperature Coefficient
¾
0°C<Ta<70°C
¾
±1.1
¾
mV/°C
No load
¾
HT7024A-1
Symbol
Ta=25°C
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
2.328
2.400
2.472
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.1
VDET
V
IDD
Operating Current
8V
¾
4
7
mA
VDD
Operating Voltage
¾
1.5
¾
24
V
IOL
Output Sink Current
2V
VOUT=0.2V
0.5
1
¾
mA
DVDET
DTa
Temperature Coefficient
¾
0°C<Ta<70°C
¾
±0.9
¾
mV/°C
Rev. 1.50
No load
¾
3
September 30, 2008
HT70XXA-1
HT7027A-1
Symbol
Ta=25°C
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
2.619
2.700
2.781
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.1
VDET
V
IDD
Operating Current
8V
¾
4
7
mA
VDD
Operating Voltage
¾
1.5
¾
24
V
IOL
Output Sink Current
2V
VOUT=0.2V
0.5
1
¾
mA
DVDET
DTa
Temperature Coefficient
¾
0°C<Ta<70°C
¾
±0.9
¾
mV/°C
No load
¾
HT7033A-1
Symbol
VDET
Ta=25°C
Parameter
Detection Voltage
Test Conditions
Min.
Typ.
Max.
Unit
¾
3.201
3.300
3.399
V
¾
0.02
VDET
0.05
VDET
0.1
VDET
V
¾
4
7
mA
1.5
¾
24
V
VOUT=0.25V
1.2
2.5
¾
mA
0°C<Ta<70°C
¾
±0.9
¾
mV/°C
VDD
Conditions
¾
VHYS
Hysteresis Width
¾
IDD
Operating Current
8V
VDD
Operating Voltage
¾
IOL
Output Sink Current
DVDET
DTa
Temperature Coefficient
No load
¾
2.5V
¾
HT7039A-1
Symbol
Ta=25°C
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
3.783
3.900
4.017
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.1
VDET
V
IDD
Operating Current
8V
¾
4
7
mA
VDD
Operating Voltage
¾
1.5
¾
24
V
IOL
Output Sink Current
VOUT=0.25V
1.2
2.5
¾
mA
DVDET
DTa
Temperature Coefficient
0°C<Ta<70°C
¾
±0.9
¾
mV/°C
Rev. 1.50
2.5V
¾
No load
¾
4
September 30, 2008
HT70XXA-1
HT7044A-1
Ta=25°C
Symbol
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
4.268
4.400
4.532
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.1
VDET
V
IDD
Operating Current
8V
VDD
Operating Voltage
¾
IOL
Output Sink Current
DVDET
DTa
Temperature Coefficient
¾
4
7
mA
1.5
¾
24
V
VOUT=0.36V
3
6
¾
mA
0°C<Ta<70°C
¾
±0.9
¾
mV/°C
No load
¾
3.6V
¾
HT7050A-1
Ta=25°C
Symbol
Parameter
Test Conditions
VDD
Conditions
Min.
Typ.
Max.
Unit
VDET
Detection Voltage
¾
¾
4.850
5.000
5.150
V
VHYS
Hysteresis Width
¾
¾
0.02
VDET
0.05
VDET
0.1
VDET
V
¾
4
7
mA
¾
2.1
¾
24
V
VOUT=0.36V
3
6
¾
mA
0°C<Ta<70°C
¾
±0.9
¾
mV/°C
IDD
Operating Current
8V
VDD
Operating Voltage
¾
IOL
Output Sink Current
DVDET
DTa
Temperature Coefficient
3.6V
¾
No load
Functional Description
The HT70XXA-1 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 (-)
The figure demonstrates the NMOS output type with
positive output polarity (VOUT is normally open, active
low). The HT70XXA-1 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.
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
R
V
V
R E F
R
R L
V
B
C
V
O U T
M N
B
M 1
The detectable voltage is defined as:
R
RA + RB + RC
´ VREF
RB + RC
C
V
The release voltage is defined as:
RA + RB
´ VREF
VDET (+) =
RB
Rev. 1.50
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
S S
NMOS Output Voltage Detector (HT70XXA-1)
5
September 30, 2008
HT70XXA-1
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-1 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 -1
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 -1
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 -1
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-1
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 -1
V
Rev. 1.50
6
S S
V
S S
September 30, 2008
HT70XXA-1
· 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 -1
H T 7 0 4 4 A -1
V
V
S S
S S
Charge Monitoring Circuit
Change of Detectable Voltage
The following circuit shows a charged monitor for
protection against battery deterioration by
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 -1
B
S S
V
S S
H T 7 0 X X A -1
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 -1
V
V
S S
S S
Detectable Voltage = Vf1+Vf2+VDET
Rev. 1.50
7
September 30, 2008
HT70XXA-1
Level Selector
The following diagram illustrates a logic level selector.
V
D D
V
V
S S
V
5 .0 V
V
D E T 1
3 .9 V
V
D E T 2
V
O U T
H T 7 0 3 9 A -1
H T 7 0 5 0 A -1
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. 1.50
8
September 30, 2008
HT70XXA-1
Package Information
3-pin TO92 Outline Dimensions
A
B
D
C
E
F
G
H
Symbol
A
Rev. 1.50
Dimensions in mil
Min.
Nom.
Max.
170
¾
200
200
B
170
¾
C
500
¾
¾
D
11
¾
20
E
90
¾
110
F
45
¾
55
G
45
¾
65
H
130
¾
160
I
8
¾
18
a
4°
¾
6°
9
September 30, 2008
HT70XXA-1
3-pin SOT89 Outline Dimensions
I
A
J
B
C
E
D
G
F
Symbol
Rev. 1.50
H
Dimensions in mil
Min.
Nom.
Max.
A
173
¾
181
B
59
¾
72
C
90
¾
102
D
35
¾
47
E
155
¾
167
F
14
¾
19
G
17
¾
22
H
¾
59
¾
I
55
¾
63
J
14
¾
17
10
September 30, 2008
HT70XXA-1
5-pin SOT23-5 Outline Dimensions
D
C
L
H
E
q
e
A
A 2
b
Symbol
Dimensions in mm
Min.
Nom.
Max.
1.00
¾
1.30
A1
¾
¾
0.10
A2
0.70
¾
0.90
A
Rev. 1.50
A 1
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
3.00
L
0.37
¾
¾
q
1°
¾
9°
11
September 30, 2008
HT70XXA-1
Product Tape and Reel Specifications
3-pin 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. 1.50
12
September 30, 2008
HT70XXA-1
Reel Dimensions
D
T 2
A
C
B
T 1
SOT89
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
1.90±0.15
T1
Space Between Flange
12.4+0.2/-0.0
T2
Reel Thickness
17.0+0.0/-0.4
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+1.5/-0.0
T2
Reel Thickness
11.4+1.5/-0.0
Rev. 1.50
13
September 30, 2008
HT70XXA-1
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. 1.50
14
September 30, 2008
HT70XXA-1
Carrier Tape Dimensions
P 0
D
P 1
t
E
F
W
C
D 1
P
B 0
K 0
A 0
R e e l H o le
IC
M a r k in g
SOT89
Symbol
W
Description
Dimensions in mm
12.0+0.3/-0.1
Carrier Tape Width
P
Cavity Pitch
E
Perforation Position
1.75±0.10
8.0±0.1
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
t
Carrier Tape Thickness
C
Cover Tape Width
0.300±0.013
9.3±0.1
SOT23-5
Symbol
Description
Dimensions in mm
W
Carrier Tape Width
P
Cavity Pitch
E
Perforation Position
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
8.0±0.3
4.0±0.1
4.0±0.1
A0
Cavity Length
3.15±0.10
B0
Cavity Width
3.2±0.1
K0
Cavity Depth
t
Carrier Tape Thickness
C
Cover Tape Width
Rev. 1.50
1.4±0.1
0.20±0.03
5.3±0.1
15
September 30, 2008
HT70XXA-1
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
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Tel: 886-2-2655-7070
Fax: 886-2-2655-7373
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G Room, 3 Floor, No.1 Building, No.2016 Yi-Shan Road, Minhang District, Shanghai, China 201103
Tel: 86-21-5422-4590
Fax: 86-21-5422-4705
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Tel: 86-755-8616-9908, 86-755-8616-9308
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Tel: 86-10-6641-0030, 86-10-6641-7751, 86-10-6641-7752
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Tel: 1-510-252-9880
Fax: 1-510-252-9885
http://www.holtek.com
Copyright Ó 2008 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. 1.50
16
September 30, 2008