UTC31002A

UTC 31002A LINEAR INTEGRATED CIRCUIT TELEPHONE TONE RINGER DESCRIPTION The UTC 31002A is a bipolar integrated circuit designed for telephone bell replacement. It can also be used as alarms or other alerting devices. FEATURES *Designed for telephone bell replacement. *Low current drain for multiple extension of lines. *Adjustable 2-frequency tone. *Adjustable warbling rate. *Built-in hysteresis prevents false triggering and rotary dial 'CHIRPS'. *Programmable for initiation current by simple external resistor SOP-8 DIP-8 PIN CONFIGURATIONS Vcc RSL Low Freq. Time Constant Low Freq. Time Costant 1 2 3 4 8 7 6 5 Output High Freq. Time Constant High Freq. Time Constant GND ABSOLUTE MAXIMUM RATINGS(Ta=25°C ) PARAMETER Supply Voltage Power Dissipation Operating Temperature Storage Temperature SYMBOL Vcc Pd Topr Tstg VALUE 30 400 -45 to 85 -65 to 150 UNIT V mW °C °C UTC UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R108-005,A UTC 31002A BLOCK DIAGRAM LINEAR INTEGRATED CIRCUIT R2 C3 R3 4 7 6 3 C2 LOW OSC HIGH OSC AMP 8 OUTPUT 1 POWER SUPPLY (WITH HYSTERESIS) 5 2 Note:R2,R3,C2 and C3 are parts externally mounted ELECTRICAL CHARACTERISTICS( Ta=25°C, all voltage referenced to GND unless otherwise specified) PARAMETER Operating Supply Voltage Initiation Supply Voltage (note 1) Initiation Supply Current (note 1) Sustaining Voltage (note 2) Sustaining Current (note 2) Output Voltage High Output Voltage Low IIN(Pin 3) IIN(Pin 7) High Frequency 1 High Frequency 2 Low Frequency SYMBOL Vcc Vsi Isi Vsus Isus VOH VOL TEST CONDITIONS See Fig.2 6.8K-Pin 2 to GND See Fig.2 No Load Vcc=Vsus,See Fig.2 Vcc=21V, I8=-15mA Pin6=6V, Pin7=GND Vcc=21V, I8=15mA Pin6=GND, Pin7=6V Pin3=6V, Pin4=GND Pin7=6V, Pin6=GND R3=191K, C3=6800pF R3=191K, C3=6800pF R2=165K, C2=0.47µF MIN 17 1.4 9.7 0.7 17.0 TYP 19 2.8 11.0 1.4 19.0 MAX 29.0 21 4.2 12.0 2.5 21.0 1.6 500 500 563 704 11.0 UNIT V V mA V mA V V nA nA Hz Hz Hz FH1 FH2 FL 461 576 9.0 512 640 10 *NOTE (See electrical characteristics sheet) 1. Initiation supply voltage (Vsi) is the supply voltage required to start the tone ringer oscillating. 2. Sustaining voltage (Vsus) is the supply voltage required to maintain oscillation. UTC UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R108-005,A UTC 31002A APPLICATION NOTE LINEAR INTEGRATED CIRCUIT shows the I-V characteristic for UTC 31002A tone ringer. Curve A is a plot with RSL