AS2534UTT

Overview

The AS2534UTT is a CMOS integrated circuit designed for high-performance electronic telephones with basic features. It integrates a line interface, speech circuit, dialler, and ringer into a single chip. The device supports LD/MF dialing, mixed-mode dialing, and 31-digit last number redial (LNR). It lacks direct or indirect memory keys but includes repeat dialing by busy/engaged status. The IC operates within a DC line current range of 13 to 100 mA, extending down to 5 mA with reduced performance. Key electrical parameters include a typical transmit gain of 36.6 dB and receive gain of 3 dB. The supply voltage ranges from 3.8V to 5V, with an oscillator frequency of 3.58 MHz.

Feature Summary

• Integrates line interface, speech circuit, dialler, and ringer functions
• Supports LD/MF dialing and mixed-mode dialing capabilities
• Features 31-digit last number redial (LNR) with sliding cursor protocol
• Includes repeat dialing functionality for busy or engaged lines

Applications

• Basic feature electronic telephone sets
• PABX compatible telephony systems
• Telephones requiring LNR and repeat dialing without memory storage

Procurement Notes

Verify the specific suffix 'UTT' against official documentation to confirm package type and temperature rating. Ensure compatibility with required keyboard matrix configurations, as the AS2534 variant lacks memory keys compared to other models in the series. Confirm bond options match the intended application requirements before ordering.

Selection Notes

Select the AS2534 when last number redial and repeat dialing are required but direct or indirect memory keys are unnecessary. This model differs from the AS2533 and AS2536 by omitting memory functions. Verify that the PABX system supports the sliding cursor protocol for efficient LNR usage behind access codes.

Part Context

The AS2534 is part of the AS253x family of multib-standard CMOS telephone ICs manufactured by ams AG. It is pin-compatible with the AS2533, AS2535, and AS2536 variants. The primary distinction lies in the internal RAM configuration, where the AS2534 excludes memory keys while retaining core dialling and speech functionalities.

Replacement Considerations

The AS2533, AS2535, and AS2536 are pin-compatible alternatives within the same family. Selection depends on whether memory keys or different volume reset behaviors are needed. No other external substitutes are documented.