PEF 80902 H V1.1

Telecom Overview

The PEF 80902 is a second-generation modular ISDN Network Termination Type 1 (NT1) controller designed for T-SMINT applications. It integrates U- and S-transceivers on a single CMOS chip, supporting 4B3T line coding for the U-interface and compliant with ETSI, FTZ, ANSI, and ITU standards. The device operates on a single 3.3 V supply and features automatic activation/deactivation protocols. Key electrical characteristics include a typical power consumption of 185 mW during random data transmission over an ETSI Loop 2 and 15 mW in power-down mode. It utilizes a 15.36 MHz crystal oscillator and provides an IOM-2 interface for monitoring.

Telecom Feature Summary

• Single-chip integration of U-interface (4B3T) and S/T-interface transceivers for NT1 functionality without requiring a microcontroller.
• Supports fully automatic activation and deactivation procedures compatible with ETSI and FTZ loop specifications.
• Includes internal Power-On Reset (POR) and Undervoltage Detection (UVD) circuits eliminating external component requirements.
• Features optional IOM-2 interface for debugging and test pattern generation via pin strapping.

Telecom Applications

• ISDN Basic Rate Access (BRA) Network Termination Type 1 (NT1) devices
• Modular ISDN terminal adapters requiring T-SMINT compliance
• Telecommunications equipment utilizing 4B3T line coding

Telecom Procurement Notes

Verify component authenticity through authorized Infineon distributors or certified suppliers. Confirm that the specific revision matches the required datasheet version DS 1 from November 2001. Ensure handling procedures comply with ESD robustness guidelines, noting the specified 2kV protection level. Check for any obsolescence notices as this component dates to the early 2000s.

Telecom Selection Notes

Select the PEF 80902 when designing an NT1 device requiring T-SMINT compatibility and 4B3T signaling. It is suitable for applications needing low power consumption (185 mW active) and single 3.3 V operation. Consider alternatives if integrated hybrid circuits are preferred, as this part requires an external hybrid. Verify support for point-to-point and bus configurations on the S/T interface.

Telecom Part Context

The PEF 80902 belongs to Infineon's second-generation T-SMINT product family, serving as an evolution of the earlier PEB 8090. It is specifically designated for ordinary NT1 functions, distinguishing it from intelligent extended (IX) or intelligent (I) variants which include additional HDLC controllers or processing capabilities. This component focuses on pure layer 1 connectivity and protocol handling.

Telecom Replacement Considerations

The PEF 80902 is functionally compatible with the PEB 8090 for NT1 applications. Designers should verify pin compatibility and register access differences if migrating between generations. No direct modern equivalents are listed; legacy stock verification is recommended.

Telecom FAQ

Does the PEF 80902 include an integrated hybrid circuit?

No, the PEF 80902 does not provide an integrated hybrid. An external hybrid consisting of only two additional resistors is required for board design.

What is the typical power consumption in power-down mode?

The typical power consumption in power-down mode is 15 mW.

Can the PEF 80902 operate with a 5V supply?

No, the device requires a single 3.3 Volt power supply. While I/O inputs accept 3.3V and 5V levels, the core supply voltage is 3.3V.