U4037B-N is a linear integrated circuit for use in telephone sets. It contains the speech circuit, tone-ringer interface, sidetone equivalent and ear-protection rectifiers. The circuit is line powered and contains all components necessary for amplification of signals and adaptation to the line.
The U4037B-N is a linear integrated circuit for telephone sets, providing speech processing, tone‑ringer interface, sidetone control and DTMF handling. It integrates microphone and earpiece amplifiers, automatic gain control and line‑loss compensation in a single SO24 package.
The document lists absolute maximum ratings, electrical characteristics, pin functions, package dimensions and an environmental policy statement confirming the device contains no ozone‑depleting substances.
| Line current (Ip) | 140 mA |
|---|---|
| DC line voltage (Vi) | 12 V |
| Junction temperature (Tj) | 125 °C |
| Package type | SO24 |
| Dimensions | 15.55 mm × 8.65 mm |
The device is rated for a maximum line current of 140 mA.
It operates from a DC line voltage of 12 V.
The IC is provided in an SO24 surface‑mount package.
No, TEMIC certifies that the semiconductor does not contain ozone‑depleting substances.