BOWIN ENG7230 Voltage detector Datasheet

DT
其朋半導體股份有限公司
Chip Design Technology
Inc.
March 14, 2000
CDT7230
P1
VOLTAGE DETECTOR
THE CDT7230 SERIES
■
1. Non-adjusting voltage detector by using CMOS Technology, 2.0-15.0VDC operating range.
2. The detecting voltage is fixed internally, and can be changed by new masking.
3. Composed of Standard Voltage Source, a Comparator, a Hysteresis Circuit, and an Output
Driver.
4. Output Structure is a N-ch Open-Drain Output.
5. Normally LED is off. It will turn on when voltage is low.
FEATURES
PACKAGE
■
■
Low Power Consumption
Low Temperature Coefficient
Built-in Hysteresis Characteristic
Built-in High-Stability Reference Source
Chip Form
T0-92
SOT-89
■
APPLICATIONS
Battery Checker
Level Selector
Power Failure Detector
Micro Computer Reset
Battery Backup of Memories
ARRANGEMENT
A. Chip form
■
PRODUCTS LIST
Part No.
CDT7230-01
CDT7230-02
CDT7230-02B
CDT7230-03
CDT7230-03C
*CDT7230-04
*CDT7230-05
Min.
2.15V
2.35V
2.23V
2.45V
2.62V
3.90V
4.56V
Typ.
2.235
2.450
2.300
2.545
2.700
4.70
Max. Hys. Width Mark
2.32V
0.112V
2235
2.53V
0.123V
2450
2.37V
0.115V
2300
2.64V
0.128V
2545
2.78V
0.135V
2700
Pilot run
4.84
0.235V
4700
■PIN
LED
●
B. T0-92 (Front View)
2545
C. SOT-89 (Front View)
2545
(IC=CDT7230-3)
(IC=CDT7230-3)
LED VDD VSS
CDT7230
66 x 54 Mil
IC substrate to VDD
LED VDD VSS
LED VDD VSS
(Bottom View)
(Bottom View)
LED VDD
VSS
LED VDD VSS
CDT7230 --- 1
CDT7230
P2
VOLTAGE DETECTOR
CDT - 7230 規格表
A. Function:
When the supply voltage (VDD) drops to the preset value, the LED lamp will turns
on.
B. Characteristics:
Maximum Operating Voltage 12V
Maximum Operating Current 10 uA
(@VDD = 8V)
LED current minimum 0.5 mA
(@ Vout = 0.2V﹐@ VDD = 2V)
C. Application Circuit : (Examples)
■CDT7230-3 to detect 2.55V
■CDT7230-3 to detect 7V using divider
3VDC
R1
LED
LED
LED
Reference values
R1=1.5M
R2=1K
R2
VDD
VSS
LED
CDT7230-03
VDD
CDT7230-03
CDT7230 --- 2
VSS
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