TEA1093 is a bipolar circuit intended for use in line-powered telephone sets. In conjunction with a member of the TEA1060 family or PCA1070 transmission circuits, TEA1093 provides hands-free/listening-in functions for telephone sets. TEA1093 has many adjustable functions, which can be controlled by external circuits. This document provides detailed specifications of TEA1093.
The Philips TEA1093 is an integrated bipolar circuit designed specifically for use in line-powered telephone sets to enable hands-free operation. It functions as a complete add-on circuit that incorporates a stabilized power supply, a microphone channel with adjustable gain and mute capabilities, and a loudspeaker channel with bridge-tied load drive.
The device includes a duplex controller that manages signal and noise monitoring on both channels to prevent howling by maintaining a constant sum of gains between the transmit and receive modes. Key features include externally adjustable parameters for volume control, switching ranges, and envelope timing, making it suitable for various hands-free applications.
| Operating ambient temperature | -25 to +75 °C |
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It is intended for use in line-powered telephone sets with hands-free/listening-in functions.
The device is available in a plastic dual in-line package (DIP28) and a plastic small outline package (SOT136-1).
When the PD input is HIGH, the current consumption from pin SUP drops to a maximum of 55 µA.