AS2536UT-Z

Overview

The AS2536UT-Z is a CMOS integrated circuit designed for building high-performance electronic telephones with basic features. It integrates a line interface, speech circuit, dialler, and ringer into a single die. The device supports LD/MF dialing, mixed-mode dialing, and offers 4 direct memories and 10 indirect memories. It operates within a supply voltage range of 3.8V to 5V and consumes 4mA of current. The component is housed in a 28-SOIC package and functions within an operating temperature range of -25°C to +70°C.

Feature Summary

• Integrates line interface, speech circuit, dialler, and ringer on a single chip
• Supports LD/MF dialing, mixed-mode dialing, and last number redial
• Includes programmable tone ringer with melody and volume selection
• Features electronic receive volume control and microphone mute

Applications

• Electronic telephone sets with basic features
• Telecom interfaces requiring single-chip integration
• PABX compatible telephony systems

Procurement Notes

Verify the exact ordering suffix UT-Z to confirm tape and reel packaging, as standard versions may use tubes. Confirm end-of-life status and lead times with authorized distributors. Ensure compatibility with existing PCB footprints for the 28-SOIC package. Check for RoHS compliance documentation if required by regional regulations.

Selection Notes

Select the AS2536UT-Z when four direct memory keys and ten indirect memory keys are required. Choose this model over the AS2533 if specific memory configurations differ. Verify that the 28-SOIC package fits the design constraints. Ensure the application requires LD/MF dialing capabilities and programmable ring tones.

Part Context

The AS2536 is part of the AS253x family from ams OSRAM (formerly austriamicrosystems). This family includes pin-compatible variants like the AS2533, AS2534, and AS2535, which differ primarily in memory capacity and key functionality. The AS2536 specifically provides a balance of direct and indirect memory options for standard telephony applications.

Replacement Considerations

The AS2533 is a pin-compatible alternative within the same family but offers different memory configurations. Verify functional equivalence regarding memory slots and key layouts before substitution. No other direct substitutes are publicly confirmed.