Preliminary Datasheet
VOLTAGE DETECTOR
General Description
The AZ70XX series ICs are under voltage detectors
with a built in voltage threshold and low power con-
sumption. The AZ70XX are specifically designed to
accurately monitor power supplies.
The AZ70XX use a precision on-chip voltage refer-
ence and a comparator to measure the input operating
voltage. These ICs can accurately reset the system after
detecting voltage at the time of switching power on and
instantaneous power off in various CPU systems and
other logic systems. The detect voltage thresholds are
2.3V/2.5V/2.7V/2.9V/3.1V/3.3V/4.2V/4.5Vfor
AZ7023/25/27/29/31/33/42/45 respectively. Built in
hysteresis helps to prevent erratic operation in the pres-
ence of noise.
The AZ70XX series are available in 2 standard pack-
ages: TO-92 (bulk or ammo packing) and SOT-89-3.
AZ70XX
Features
·
Low Current Consumption:
I
CCL
=300
µA
Typical
I
CCH
=30
µA
Typical
Low Minimum Operating Voltage for Output
Resetting: 0.8V Typical
Built in Hysteresis Voltage: 50mV Typical
Open Collector Output
Extended Temperature Range: -40 to 85
o
C
·
·
·
·
Applications
·
·
·
·
·
Low Battery Voltage Detector
Power Fail Indicator
Processor Reset Generator
Battery Backup Control
Home Electric Appliances
TO-92
TO-92 Ammo Packing
SOT-89-3
Figure 1. Package Types of AZ70XX
Mar. 2007 Rev. 1. 5
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BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
VOLTAGE DETECTOR
Pin Configuration
Z Package
(TO-92)
Z Package
(TO-92 Ammo Packing)
R Package
(SOT-89-3)
AZ70XX
3
2
1
OUT
GND
V
CC
3
2
1
OUT
GND
V
CC
V
CC
GND OUT
1
2
3
Figure 2. Pin Configuration of AZ70XX (Top View)
Functional Block Diagram
V
CC
OUT
+
-
GND
Figure 3. Functional Block Diagram of AZ70XX
Mar. 2007 Rev. 1. 5
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BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
VOLTAGE DETECTOR
Ordering Information
AZ70
Circuit Type
Detect Voltage
23: 2.3V 31: 3.1V
25: 2.5V 33: 3.3V
27: 2.7V 42: 4.2V
29: 2.9V 45: 4.5V
Part Number
Tin Lead
AZ7023Z
AZ7023ZTR
AZ7025Z
AZ7025ZTR
AZ7027Z
AZ7027ZTR
AZ7029Z
AZ7029ZTR
AZ7031Z
AZ7031ZTR
AZ7033Z
AZ7033ZTR
AZ7042Z
AZ7042ZTR
AZ7045Z
AZ7045ZTR
AZ7023RTR
AZ7025RTR
AZ7027RTR
AZ7029RTR
AZ7031RTR
AZ7033RTR
AZ7042RTR
AZ7045RTR
Lead Free
AZ7023Z-E1
AZ7023ZTR-E1
AZ7025Z-E1
AZ7025ZTR-E1
AZ7027Z-E1
AZ7027ZTR-E1
AZ7029Z-E1
AZ7029ZTR-E1
AZ7031Z-E1
AZ7031ZTR-E1
AZ7033Z-E1
AZ7033ZTR-E1
AZ7042Z-E1
AZ7042ZTR-E1
AZ7045Z-E1
AZ7045ZTR-E1
AZ7023RTR-E1
AZ7025RTR-E1
AZ7027RTR-E1
AZ7029RTR-E1
AZ7031RTR-E1
AZ7033RTR-E1
AZ7042RTR-E1
AZ7045RTR-E1
AZ70XX
-
E1: Lead Free
Blank: Tin Lead
TR: Tape and Reel or Ammo
Blank: Bulk
Package
Z: TO-92
R: SOT-89-3
Marking ID
Tin Lead
AZ7023Z
AZ7023Z
AZ7025Z
AZ7025Z
AZ7027Z
AZ7027Z
AZ7029Z
AZ7029Z
AZ7031Z
AZ7031Z
AZ7033Z
AZ7033Z
AZ7042Z
AZ7042Z
AZ7045Z
AZ7045Z
7023R
7025R
7027R
7029R
7031R
7033R
7042R
7045R
Lead Free
AZ7023Z-E1
AZ7023Z-E1
AZ7025Z-E1
AZ7025Z-E1
AZ7027Z-E1
AZ7027Z-E1
AZ7029Z-E1
AZ7029Z-E1
AZ7031Z-E1
AZ7031Z-E1
AZ7033Z-E1
AZ7033Z-E1
AZ7042Z-E1
AZ7042Z-E1
AZ7045Z-E1
AZ7045Z-E1
E723
E725
E727
E729
E731
E733
E742
E745
Package
Temperature
Range
Detect
Voltage
2.3V
Packing Type
Bulk
Ammo
Bulk
Ammo
Bulk
Ammo
Bulk
Ammo
Bulk
Ammo
Bulk
Ammo
Bulk
Ammo
Bulk
Ammo
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
2.5V
2.7V
2.9V
TO-92
-40 to 85
o
C
3.1V
3.3V
4.2V
4.5V
2.3V
2.5V
2.7V
SOT-89-3
-40 to 85
o
C
2.9V
3.1V
3.3V
4.2V
4.5V
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
Mar. 2007 Rev. 1. 5
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BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
VOLTAGE DETECTOR
Absolute Maximum Ratings (Note 1)
Parameter
Supply Voltage
Power Dissipation (Package Limitations,
T
A
=25
o
C)
Operating Junction Temperature
Storage Temperature Range
Symbol
V
CC
P
D
SOT-89-3 Package: 500
T
J
T
STG
150
-65 to 150
o
o
AZ70XX
Value
-0.3 to 20
TO-92 Package: 400
Unit
V
mW
C
C
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to
the device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under"Recommended Operating Conditions" is not implied. Exposure to "Absolute Maxi-
mum Ratings" for extended periods may affect device reliability.
Recommended Operating Conditions
Parameter
Supply Voltage
Operating Temperature Range
Symbol
V
CC
T
A
-40
Min
Max
18
85
Unit
V
o
C
Mar. 2007 Rev. 1. 5
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BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
VOLTAGE DETECTOR
Electrical Characteristics
T
A
=25
o
C, unless otherwise specified.
Parameter
Symbol
Conditions
AZ7023R/Z
AZ7025R/Z
R
L
=200Ω
(Note 2)
V
OL
≤
0.4V
AZ7027R/Z
AZ7029R/Z
AZ7031R/Z
AZ7033R/Z
AZ7042R/Z
AZ7045R/Z
Low-level Output Voltage
Output Leakage Current
Hysteresis Voltage
Detect Voltage Temperature
Coefficient
Circuit Current at On Time
Circuit Current at Off Time
Minimum Operating Voltage
V
OL
I
OH
V
HYS
∆V
DET
/(V
DET
×
∆T)
I
CCL
I
CCH
V
OPR
V
CC
=V
DET
(min)-0.05V
R
L
=200Ω (Note 2)
V
CC
=15V
R
L
=200Ω (Note 2)
R
L
=200Ω (Note 2)
V
CC
=V
DET
(min)-0.05V
V
CC
=5.25V
R
L
=200Ω (Note 2)
V
OL
≤
0.4V
V
CC
changed from 5.25V to
V
DET
(min)-0.05V, R
L
=1.0KΩ,
C
L
=100p (Note 3)
V
CC
changed from V
DET
(min)-
0.05V to 5.25V, R
L
=1.0KΩ,
C
L
=100p (Note 3)
V
CC
=V
DET
(min)-0.05V
T
A
=25
o
C (Note 4)
V
CC
=V
DET
(min)-0.05V
T
A
=-40 to 85
o
C (Note 4)
20
mA
I
OL
Ⅱ
16
30
50
±0.01
300
30
0.8
500
50
Min
2.15
2.35
2.55
2.75
2.95
3.15
4.05
4.35
Typ
2.3
2.5
2.7
2.9
3.1
3.3
4.2
4.5
Max
2.45
2.65
2.85
3.05
3.25
3.45
4.35
4.65
0.4
0.1
100
V
µA
mV
% /
o
C
µA
µA
V
V
Unit
AZ70XX
Detect Voltage
V
DET
“L”
Transmission Delay Time
tpHL
10
µs
“H”
Transmission Delay Time
tpLH
15
µs
I
OL
Ⅰ
Output Current at On Time
Note 2: See test circuit 1 and Figure 12.
Note 3: See test circuit 2 and Figure 12.
Note 4: See test circuit 3. Adjusting the regulative power source until the reading value of voltage meter V is 0.4V,
the reading value of current meter A is defined as "Output Current at On Time".
Mar. 2007 Rev. 1. 5
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BCD Semiconductor Manufacturing Limited
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