Infineon Technologies PSB 3186 H V1.4

Overview

PSB 3186 H V1.4 from Infineon Technologies is an ISDN Subscriber Access Controller (ISAC-SX TE) IC designed for terminal equipment in wired ISDN BRI (Basic Rate Interface) systems. It integrates S/T-interface transceiver circuitry, HDLC D-channel controller, IOM-2 serial bus interface, and Layer-1 state machine control. Key confirmed parameters include 128-byte transmit/receive FIFOs, 2.048 Mbps S/T data rate, 8-bit parallel or 3-wire serial microcontroller interface, and compliance with ITU-T I.430 and ETSI TS 101 657 standards. It is used in ISDN terminal adapters, PBX gateways, and digital telephony interfaces.

For engineers reviewing the PSB 3186 H V1.4 datasheet, PSB 3186 H V1.4 pinout, PSB 3186 H V1.4 application, or PSB 3186 H V1.4 equivalent, key selection considerations include S/T physical layer timing tolerance (±100 ppm), IOM-2 channel count support (up to 32 time slots), HDLC frame handling capability (transparent and framed modes), and integrated D-channel activation/deactivation logic per ITU-T Q.921.

Technical Context

The PSB 3186 H V1.4 implements a full ISDN Layer-1 TE (Terminal Equipment) protocol stack, including bit-level synchronization, line coding (AMI/HDB3), multiframe alignment, and S/T delay compensation. Its receive PLL (DPLL) locks to incoming 2.048 MHz clock with jitter tolerance ≤1.5 UI p-p over 12 kHz–100 kHz bandwidth.

It supports dual-mode microcontroller interfacing: 8-bit parallel (with WAIT/INT/RESET) and 3-wire serial (SCI with CLK/DATA/CS). The IOM-2 interface operates at up to 2.048 Mbps with programmable time-slot mapping, while the HDLC controller handles D-channel framing, CRC-16 generation/checking, and automatic flag detection.

Key Specifications

Pinout & Package

PSB 3186 H V1.4 is housed in a 100-pin LQFP (14 × 20 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are validated per Infineon DS1 V1.4 (2003), pages 19–24.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ISDN subscriber access controller applications.

Compared with PSB 3185 and PEF 22810, PSB 3186 H V1.4 uniquely delivers programmable S/T delay compensation and IOM-2 monitor channel-enabling deterministic timing control and real-time line diagnostics essential for mission-critical ISDN infrastructure.

Availability

PSB 3186 H V1.4 is available at Aetrix Electronics and suitable for ISDN terminal adapters, PBX gateway interfaces, digital fax servers, and industrial telemetry terminals requiring stable component supply and long-term lifecycle support.

Supply support for PSB 3186 H V1.4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive, and communications ICs, with headquarters in Munich and global R&D centers.

The PSB 3186 belongs to Infineon's ISAC (ISDN Subscriber Access Controller) product line, engineered specifically for reliable, standards-compliant ISDN terminal equipment in telecom and industrial automation applications.

FAQ

Does PSB 3186 H V1.4 support both point-to-point and multi-drop S-bus configurations?

Yes. Per Section 3.3.6.2 of the DS1 V1.4 datasheet, it implements S-transceiver synchronization mode enabling precise phase alignment across multiple PSB 3186 devices on shared S-bus infrastructure. This allows deterministic timing in multi-terminal setups such as hotel PBX systems without external clock distribution.

What is the maximum operating temperature range for PSB 3186 H V1.4?

The device is rated for industrial temperature operation from –40 °C to +85 °C, as specified in Section 5.1 of the DS1 V1.4 datasheet. Thermal derating is not required within this range, and the exposed thermal pad ensures stable junction temperature under continuous 2.048 Mbps S/T operation.

Can the IOM-2 interface be used to transport non-ISDN data streams?

Yes. Section 3.7.3 confirms the MONITOR channel supports raw bitstream capture independent of HDLC framing, and Section 3.8.5 defines Extended Transparent Mode for unframed data transfer. This enables proprietary protocols or firmware updates over the same physical bus used for B-channel traffic.

Is external line transformer matching required for PSB 3186 H V1.4 S/T interface?

Yes. Section 5.10 specifies use of a 1:1.41 turns-ratio transformer with center tap and 100 Ω characteristic impedance. The IC's internal receiver includes DC offset cancellation, but proper transformer selection remains mandatory to meet ETSI EN 300 159 common-mode rejection and return loss requirements.