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| FORWARD INTERNATIONAL ELECTRONICS LTD. SEMICONDUCTOR TECHNICAL DATA K2411 TELEPHONE TONE RINGER The 2411 is a bipolar integrated circuit designed for telephone tone ringer. Features * Designed for telephone bell replacement * Adjustable 2-tone frequency * Hysteresis circuit prevents false triggering and rotary dial "Chirps" * Adjustable for reduced supply initiation current Package: DIP-8 Pin No 1 2 3 4 5 6 7 8 Name VCC RSL LFI LFO GND HFO HFI OUT Function Power supply (+) Resistor select Low freq osc input Low freq osc output Ground (-) High freq osc output High freq osc input Signal output 1 2 3 4 8 7 6 5 ABSOLUTE MAXIMUM RATING Parameter DC Supply Voltage Power Dissipation Operating Temperature Storage Temperature Symbol Vcc Pd Topr Tstg Rating 36 450 -25~+75 -55~+125 Unit V mW J J ELECTRICAL CHARACTERISTICS VCC=24V,Ta=25J(Unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Operating Supply Voltage Vcc 36 V Initiation Supply Voltage (note 1) Vsi 17 19 21 V Initiation Supply Current Isi Vcc=Vsi,No Load,Rsl=6.8k 1.4 3.5 4.2 mA Sustaining Voltage (note 2) Vsus 9.7 11 13 V Vcc=Vsus,No Load Sustaining Current Isus 0.2 1.4 2.5 mA Output High Voltage VOH Vcc=21V,IOH=15mA 17 19 21 V Output Low Voltage VOL Vcc=21V,IOL=15mA 1.6 V High Frequency 1 FH1 R3=191K, C3=6800pF 461 512 563 Hz High Frequency 2 R3=191K, C3=6800pF FH2 576 640 703 Hz Low Frequency R2=165K, C2=0.47uF FL 9 10 11 Hz Note: 1.initiation supply voltage (Vsi) is the supply voltage repuired to start the tone ringer oscillating. 2.sustaining voltage (Vsus) is the supply voltage repuired to maintain oscillation. w w w . at d sh a et e u. 4 om c www..com 2411 |
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