PEF4268FV1.1

Encoders, Decoders, Converters Overview

The PEF4268FV1.1 is a balanced ringing Subscriber Line Interface Circuit (SLIC) with an integrated DC/DC converter, designed for cost-optimized Customer Premises Equipment (CPE). It operates from a single unregulated power supply voltage between 9 V and 40 V, generating all required internal voltages including a DC/DC output up to -150 V. The device supports up to 85 Vrms sinusoidal ringing and features fully programmable DC feed characteristics. It includes transversal line current sensing, Integrated Test and Diagnostic Function (ITDF) support, and synchronization capabilities for up to eight units.

Encoders, Decoders, Converters Feature Summary

• Patented ring mode significantly reduces power consumption and heat dissipation
• Integrated DC/DC converter minimizes external component count for high board density
• Backward compatible interface to standard Infineon Codec-SLIC interfaces
• Supports ITDF standards such as GR-909

Encoders, Decoders, Converters Applications

• Customer Premises Equipment (CPE)
• ISDN CPE
• xDSL CPE
• Analog Telephone Adapter (ATA)
• VoIP Gateways

Encoders, Decoders, Converters Procurement Notes

Verify the specific suffix 'V1.1' against official documentation to confirm version compatibility and pinout alignment. Ensure the selected package variant matches the design requirements, as the family includes both P-DSO-24-8 and P-TQFP-48-1 options. Confirm that the single unregulated supply range of 9 V to 40 V aligns with the target system power architecture before procurement.

Encoders, Decoders, Converters Selection Notes

Select this component when designing systems requiring a single-supply SLIC solution with minimal external passive components. It is suitable for applications needing integrated high-voltage generation for ringing without additional discrete converters. Consider the backward compatibility with existing codec interfaces if migrating from older SLIC-E or SLIC-P designs. Evaluate thermal management needs based on the patented low-power ring mode efficiency.

Encoders, Decoders, Converters Part Context

The PEF4268F belongs to Infineon’s SLIC-DC family, which also includes the PEF4268T variant in a P-DSO-24-8 package. This family builds upon robust technology derived from the popular SLIC-E and PEB 4265 platforms. The F variant specifically utilizes a P-TQFP-48-1 package to accommodate the necessary interface pins for advanced control and synchronization functions.

Encoders, Decoders, Converters Replacement Considerations

Direct replacements within the same family include the PEF4268T, though it differs in package type (P-DSO-24-8 vs. P-TQFP-48-1). Designers must verify mechanical footprint compatibility and pin mapping differences when substituting between these variants.