AS2535UT-Z

Overview

The AS2535UT-Z is a CMOS integrated circuit designed for building high-performance electronic telephones with basic features. It incorporates a line interface, speech circuit, dialler, and ringer in a single-chip architecture. The device supports LD/MF dialing, mixed-mode dialing, and 12 direct memory keys. It operates within a supply voltage range of 3.8V to 5V and consumes 4mA during speech mode. The component is housed in a 28-SOIC package and functions within an operating temperature range of -25°C to +70°C.

Feature Summary

• Integrated line interface with electronic volume control and microphone mute capabilities
• Supports LD/MF dialing with 12 direct memory keys and last number redial function
• Built-in tone ringer with selectable melody and volume settings via keyboard
• Optimized EMI performance through the use of CMOS amplifiers

Applications

• Electronic telephone sets with basic feature requirements
• Telecommunications equipment requiring single-chip integration
• PABX-compatible terminal devices

Procurement Notes

Verify the specific suffix UT-Z against official documentation to confirm packaging and environmental compliance details. Confirm end-of-life status and availability of alternative packages such as AS2535ut-t if current stock is insufficient. Ensure the supplier provides valid traceability documents matching the manufacturer's specifications.

Selection Notes

Select this model when 12 direct memory keys are required without repeat dialing functionality. Compare against AS2533/AS2536 variants if indirect memories or different key configurations are needed. Verify that the 28-SOIC package fits the target PCB layout and that the operating temperature range meets the application environment.

Part Context

The AS2535UT-Z belongs to the AS253x family of multi-standard CMOS telephone ICs manufactured by ams OSRAM AG. This family includes pin-compatible variants like the AS2533, AS2534, and AS2536, which differ primarily in memory capacity and dialing features. The AS2535 specifically offers 12 direct memories but lacks the repeat dialing found in other models.

Replacement Considerations

Public confirmed substitute part numbers include AS2535ut-t.