Infineon Technologies S6BT112A02SSBB002

Overview

S6BT112A02SSBB002 from Infineon Technologies (formerly Cypress) is a CXPI transceiver IC for automotive network communication, serving as the physical layer interface between MCU UART and CXPI bus. It supports 2.4–20 kbps bit rate, operates from 5.3 V to 18 V, delivers 6 µA typical sleep current in slave mode, and features ±40 V BUS voltage tolerance with AEC-Q100 Grade-1 qualification - deployed in body control modules for door lock and mirror actuation.

For engineers reviewing the S6BT112A02SSBB002 datasheet, S6BT112A02SSBB002 pinout, S6BT112A02SSBB002 application, or S6BT112A02SSBB002 equivalent, key selection criteria include CXPI compliance (ISO 20794-4:2020, JASO D015-3:2015), master/slave node configuration via SELMS, BUS short-to-VBAT protection, low-EMI waveshaping, and direct battery operation with load dump immunity.

Technical Context

This transceiver implements a fully integrated CXPI PHY with internal LDO regulator, RC oscillator, and thermal shutdown circuitry. It supports dual operation modes - master (with external clock input or internal SSCG on S6BT112A01 only) and slave (clock output mode) - selected by the SELMS pin, and transitions through defined states including Sleep, Standby, and Active per ISO 20794-4 timing requirements.

Its BUS I/O stage includes overcurrent protection, loss-of-ground detection (<±1 mA leakage), and ±8 kV HBM ESD robustness on BUS/BAT pins. The NSLP pin controls entry/exit from Sleep mode, while TXD/RXD interface directly with MCU UART logic using open-drain outputs requiring external pull-ups per Table 7-1 of Rev. *H datasheet.

Key Specifications

Pinout & Package

8-pin SOIC package, halogen-free, surface-mount, with 1.27 mm pitch and standard JEDEC MS-012AC outline.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CXPI transceiver applications.

Compared with NXP TJA1125 and Renesas RAA228000, S6BT112A02SSBB002 offers optimal balance of CXPI compliance, 8-pin SOIC footprint, and battery-direct operation - ideal for cost-sensitive, space-constrained body electronics where 20 kbps suffices and external 5 V regulation exists.

Availability

S6BT112A02SSBB002 is available at Aetrix Electronics and suitable for body control modules, door modules, roof modules, and seat control units requiring stable component supply across automotive production lifecycles.

Supply support for S6BT112A02SSBB002 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 is a global semiconductor leader headquartered in Munich, Germany, specializing in power systems, automotive ICs, and security solutions.

S6BT112A02SSBB002 belongs to Infineon's automotive connectivity portfolio, designed specifically for next-generation vehicle body networks requiring low-cost, low-power, and high-reliability CXPI implementation.

FAQ

Is S6BT112A02SSBB002 pin-compatible with S6BT112A01?

Yes - both share identical 8-pin SOIC package and pin assignment. The only functional difference is that S6BT112A01 includes an integrated Spread Spectrum Clock Generator (SSCG) for master-node EMI reduction, while S6BT112A02 omits this feature. No PCB redesign is needed when swapping between them.

What is the minimum external pull-up resistance required for RXD and CLK pins?

The datasheet specifies 4.7 kΩ as the recommended pull-up value for RXD and CLK pins when interfacing with 3.3 V or 5 V MCU logic. This ensures valid logic levels while maintaining rise time within CXPI timing budgets (≤1.5 µs for 20 kbps). Values below 2.2 kΩ may increase power consumption unnecessarily.

Does S6BT112A02SSBB002 support wake-up from Sleep mode via BUS activity?

Yes - it supports wake-up on valid CXPI frame detection while in Sleep mode. The BUS pin monitors for dominant pulses meeting JASO D015-3 wake pattern criteria. Upon detection, NSLP deasserts internally, exiting Sleep and asserting VCC-ready, enabling MCU to resume communication within ≤100 µs.

Can BAT pin be connected to a 24 V truck battery system?

No - the absolute maximum rating for BAT is 18 V. While the device survives 24 V jump-start transients (per ISO 7637-2 Pulse 4), sustained 24 V operation exceeds specification and risks permanent damage. For 24 V systems, use an external pre-regulator or select a transceiver rated for 27 V max, such as NXP TJA1125.