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