Infineon Technologies PSB 21493 F V1.7

Overview

PSB 21493 F V1.7 from Infineon Technologies is a highly integrated digital PBX terminal IC combining a C166-based 16-bit microcontroller, UPN line transceiver, USB 1.1 full-speed interface (12 Mbit/s), PCM codec compliant with ITU-T G.711/G.712 and ETSI NET33, and analog front-end with full-duplex acoustic echo cancellation, DTMF receiver, and tone generator - deployed in high-feature hands-free PBX phones.

For engineers reviewing the PSB 21493 F V1.7 datasheet, PSB 21493 F V1.7 pinout, PSB 21493 F V1.7 application, or PSB 21493 F V1.7 equivalent, key selection considerations include UPN transceiver compliance, USB endpoint configuration (15 SW-configurable + Control Endpoint 0), AFE differential I/O capability (3-in/3-out), echo cancellation performance, and embedded OCDS debug support.

Technical Context

The PSB 21493 F V1.7 implements complete Layer-1 and basic Layer-2 protocol handling for digital PBX terminals via its UPN transceiver supporting AMI-coded 2B+D channels and on-chip HDLC controller. Its integrated fixpoint DSP performs real-time signal processing including A-law/μ-law PCM encoding/decoding, dual transducer correction filtering, and DTMF detection.

System-level integration includes an IOM-2 bus for peripheral arbitration, X-Bus for external memory expansion, PD-Bus for power domain control, and dedicated hardware blocks for keypad scanning, LED matrix control, and two PWM units - all coordinated by the C166 CPU with 4 KB on-chip SRAM and bootstrap loader.

Key Specifications

Pinout & Package

P-TQFP-144 package with exposed thermal pad; 144-pin thermally enhanced quad flat pack, 20 mm × 20 mm, 0.5 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital PBX terminal controller applications.

Compared with PSB 21492 F V1.7, the PSB 21493 F V1.7 adds full-speed USB 1.1 host/device capability at the cost of slightly higher power consumption; versus CX82310-21, it delivers native UPN line access and UI integration but lacks SIP protocol acceleration and wideband audio support.

Availability

PSB 21493 F V1.7 is available at Aetrix Electronics and suitable for digital PBX terminals, USB-connected telephony adapters, and unified messaging endpoints requiring stable component supply, long-lifecycle support, and validated acoustic performance.

Supply support for PSB 21493 F V1.7 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 MCUs, security ICs, and communications solutions.

The INCA-P product line - including PSB 21493 F V1.7 - was designed specifically for digital terminal equipment in enterprise PBX environments, integrating line interface, audio processing, and embedded control to replace multi-chip legacy designs.

FAQ

Does PSB 21493 F V1.7 support USB 2.0 High-Speed mode?

No. The PSB 21493 F V1.7 implements only USB 1.1 Full-Speed (12 Mbit/s) operation. It does not include a USB 2.0 PHY or support High-Speed (480 Mbit/s) signaling. All USB endpoints - including the 15 configurable ones and Control Endpoint 0 - operate strictly within USB 1.1 timing and electrical specifications.

What is the maximum supported PCM sampling rate and bit depth?

The PSB 21493 F V1.7 supports 8 kHz sampling exclusively, aligned with ISDN B-channel timing. It processes 8-bit A-law/μ-law and 8/16-bit linear PCM data - no support for 16 kHz, 44.1 kHz, or 48 kHz rates. Bit depth is fixed per frame format: 8-bit compressed or 16-bit linear, with no variable-bit-depth or adaptive coding modes.

Can the on-chip C166 CPU execute code directly from external Flash via X-Bus?

Yes. The C166 core supports X-Bus expansion for external program memory. With proper address decoding and wait-state configuration, executable code can be fetched from parallel NOR Flash connected to the X-Bus interface - enabling firmware sizes beyond the 4 KB on-chip SRAM limit while maintaining deterministic instruction fetch timing.

Is the UPN transceiver compliant with CECC 30000 or ETSI EN 300 001 standards?

The UPN transceiver meets ETSI EN 300 001-1 (Digital Private Network Signalling System No. 1 - DPNSS) Annex A for 2B+D physical layer conformance, including AMI line coding, jitter tolerance, and return loss requirements. It is not CECC 30000-qualified, as that standard applies to discrete passive components, not integrated transceivers.