| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
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20 pcs
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20 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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The KA2425A is a versatile speech network integrated circuit designed for telephone applications. It incorporates essential functions including transmit and receive amplifiers, a side tone amplifier, and a DC loop interface. The device also features DTMF input capabilities, a voltage regulator for speech functions, and a regulated output voltage specifically for dialer interfaces. An equalization circuit is included for loop length compensation.
Key electrical specifications include a typical TX gain of 29.5 dB at 20mA IL and a typical RX gain of -15 dB at 20mA IL. The device supports a wide operating voltage range, from 1.5V to 15V for speech mode and 3.3V to 15V for tone dialing mode. The operating temperature range is from -20°C to +60°C.
The KA2425A is available in a DIP package with 18 terminals. Its design facilitates control of transmit, receive, and side tone levels through external resistors, and it offers a linear interface for DTMF signals. The MUTE function is also supported.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.99 | $0.99 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The operating temperature range for the KA2425A is -20°C to +60°C.
The typical TX gain of the KA2425A at 20mA is 29.5 dB.
The typical RX gain of the KA2425A at 20mA is -15 dB.
The typical DTMF driver gain at 20mA is 4.8 dB.
The typical Sidetone Rejection at 20mA is 18 dB.
The typical AC impedance in speech mode is 750 Ω.
The typical AC impedance in tone mode at 20mA is 300 Ω.