KA2425A

KA2425A INTRODUCTION SPEECH NETWORK WITH DIALER INTERFACE The KA2425A is telephone speech network integrated circuit which includes transmit amp, receive amp, side tone amp, DC loop interface function, DTMF input, voltage regulator for speech, a regulated output voltage for a dialer, and equalization circuit . 8-DIP-300A FEATURES Low voltage operation (1.5v : speech) Transmit, receive, side tone and DTMF level are controlled by external resistors Regulated voltage for dialer Loop length equalization MUTE function Linear interface for DTMF 20-SOP-375 ORDERING INFORMATION Device KA2425B KA2425AD Package 18-DIP-300A 20-SOP-375 Operating Temperature - 20°C ~ + 60°C PIN CONFIGURATION MIC 1 2 3 4 5 6 7 8 9 Fig. 1 18 17 16 15 KA2425A 14 13 12 11 10 MT TXI MS TXO TI STA VDD CC V+ EQ LR RXI LC RXO VR RMT V- KA2425A SPEECH NETWORK WITH DIALER INTERFACE ABSOLUTE MAXIMUM RATINGS Characteristic V+ Voltage VDD (V+ = 0) MT,MS inputs VLR Storage Temperature Symbol VC VDD VM VLR T STG Value -1.0 ~ +18 -1.0 ~ +6 -1.0 ~ VDD +1 -1.0V~ V+ -3.0 -65 ~ +150 (Ta = 25°C) Value 0 ~ 10 +1.5 ~ +15 +3.3 ~ +15 -20 ~ +60 Unit mA V V °C Unit V V V V °C RECOMMENDED OPERATING CONDITIONS Characteristic ITXO (Instantaneous) V+ (Voltage :Speech Mode Tone Dialing Mode Operating Temperature Symbol ICC V+ (SM) V+(TM) T ORR (T a = 25°C) ELECTRICAL CHARACTERISTICS Characteristic T X Gain from VS to V+ Gain Change Distortion Output Noise RX VRXO / VS RX Gain Change Distortion ...