Infineon Technologies PSB 3186 F V1.4

Overview

PSB 3186 F V1.4 from Infineon Technologies is an ISDN Subscriber Access Controller (ISAC-SX TE) for terminal equipment, implementing full Layer-1 S/T-interface control, HDLC D-channel processing, and IOM-2 serial bus interface. It supports 2B+D ISDN basic rate access, features integrated receive PLL with jitter tolerance ≤150 ns, operates at 3.3 V supply, and delivers 128 kbit/s S/T data transfer with automatic activation/deactivation per ITU-T I.430.

For engineers reviewing the PSB 3186 F V1.4 datasheet, PSB 3186 F V1.4 pinout, PSB 3186 F V1.4 application, or PSB 3186 F V1.4 equivalent, key selection criteria include S/T transceiver synchronization capability, IOM-2 timing compliance (t_CLK = 125 ns min), HDLC FIFO depth (128-byte RX/TX), C/I channel handling for TE state management, and support for external transformer-coupled line interface per ETSI TS 101 659.

Technical Context

The PSB 3186 implements a dual-mode S/T physical layer controller with programmable transmitter output swing (±2.5 V to ±3.5 V) and receiver sensitivity of –35 dBm. Its receive DPLL locks to incoming S/T clock with holdover stability of ±100 ppm over –40°C to +85°C and supports both synchronous and asynchronous IOM-2 operation up to 8 MHz.

It integrates a dedicated HDLC controller with automatic flag detection, CRC-16 generation/checking, and programmable frame length (up to 256 bytes). The IOM-2 handler supports time-slot multiplexing across eight 64-kbit/s channels, with MONITOR channel for real-time S/T signal observation and CDA register access for microcontroller configuration.

Key Specifications

Pinout & Package

PSB 3186 F V1.4 is housed in a 128-pin LQFP package (20 mm × 20 mm, 0.4 mm pitch) with thermal pad. Pin functions are defined per DS1 V1.4 Section 2 (Pin Configuration), including dedicated S/T differential pairs (S+, S−, T+, T−), IOM-2 serial bus signals (IOM_CLK, IOM_DATA, IOM_STB), and parallel microcontroller interface options (8-bit data bus, RD/WR, CS).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ISDN S/T controller applications.

Compared with PSB 3186 F V1.4, PSB 3185 omits S-transceiver sync and advanced test modes needed for complex IOM-2 networks, while uPD64603 trades debug visibility and bus standardization for analog integration - making PSB 3186 optimal for modular, testable, transformer-based ISDN terminal designs.

Availability

PSB 3186 F V1.4 is available at Aetrix Electronics and suitable for ISDN terminal adapters, small office PBX interfaces, and industrial telemetry terminals requiring stable component supply across long-lifecycle deployments.

Supply support for PSB 3186 F 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 ICs, and communications controllers, with headquarters in Munich and global R&D centers.

The ISAC-SX TE product line was designed specifically for ISDN terminal equipment requiring full I.430 Layer-1 compliance, low-latency D-channel processing, and flexible microcontroller interfacing - targeting telecom infrastructure and industrial communication gateways.

FAQ

Does PSB 3186 F V1.4 support NT (network termination) mode?

No. PSB 3186 F V1.4 is strictly a TE (terminal equipment) device per its ISAC-SX TE designation and functional block diagram. It implements only the TE-side state machine, S/T transmitter drive, and receiver monitoring - not NT-side line powering, echo cancellation, or U-interface functionality. NT mode requires separate hardware such as the ISAC-U series.

What transformer specifications are required for S/T interface compliance?

Per DS1 V1.4 Section 5.10, a 1:2.5 turns-ratio transformer with center-tapped secondary, 100 Ω primary impedance, and ≥1.5 kV isolation is mandatory. Recommended part is Pulse Engineering T1201 or equivalent; mismatched turns ratio causes >3 dB insertion loss and violates ETSI radiated emission limits.

Can the IOM-2 interface operate synchronously with an external master clock?

Yes. When IOM_CR.MS=0, PSB 3186 operates as IOM-2 slave: IOM_CLK is driven externally, and IOM_DATA timing aligns to rising edge of that clock. The device supports clock frequencies from 1 MHz to 8 MHz with setup/hold margins verified per DS1 V1.4 Table 5-10.

Is there hardware support for D-channel message fragmentation?

No. The HDLC controller processes complete frames up to 256 bytes as defined in MODED register settings. Fragmentation must be handled in host firmware prior to loading into XFIFOD; the hardware performs only CRC generation, flag insertion, and bit-stuffing - not segmentation/reassembly.