Infineon Technologies S6BT112A01SSBB202

Overview

S6BT112A01SSBB202 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, JASO/SAE/ISO CXPI compliance, 5.3–18 V operating voltage, and includes spread spectrum clock generation (SSCG) for master-node EMI reduction.

For engineers reviewing the S6BT112A01SSBB202 datasheet, S6BT112A01SSBB202 pinout, S6BT112A01SSBB202 application, or S6BT112A01SSBB202 equivalent, key selection criteria include CXPI master/slave node configuration via SELMS, BUS pin ±40 V tolerance, sleep current of 6 µA (typical), and AEC-Q100 Grade-1 qualification for under-hood deployment.

Technical Context

This transceiver implements a full CXPI PHY layer with integrated LDO regulator, RC oscillator, and thermal shutdown circuitry. It operates in two configurable modes-master (SELMS = low) or slave (SELMS = high)-with distinct CLK pin behavior: input for master timing reference, open-drain output for slave clock distribution.

The device features dual protection architecture: BUS short-to-VBAT overcurrent detection and loss-of-ground monitoring with <±1 mA leakage. Its SSCG function (S6BT112A01 only) modulates the baud-rate clock to reduce conducted and radiated emissions during master-node transmission.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (Small Outline Integrated Circuit), halogen-free, RoHS-compliant, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TJA1120 and BD99954GWZ, S6BT112A01SSBB202 delivers superior EMI control via SSCG, lowest sleep current among CXPI transceivers, and single-chip integration (LDO + PHY), simplifying layout and validation for dedicated automotive CXPI endpoints.

Availability

S6BT112A01SSBB202 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 S6BT112A01SSBB202 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 German semiconductor manufacturer specializing in power management, automotive, and security solutions, with global R&D and manufacturing infrastructure.

The S6BT112A01SSBB202 belongs to Infineon's automotive connectivity portfolio, designed specifically to replace legacy LIN and CAN sub-networks with low-cost, low-power, EMI-robust CXPI for body electronics.

FAQ

What is the function of the NSLP pin?

The NSLP pin controls sleep mode entry and exit: logic low forces the transceiver into Sleep mode (6 µA typical current), while logic high enables Normal or Standby mode. The device must power up in Sleep mode per specification, and transitions require specific timing sequences defined in Section 5.2.2 and 5.3.2 of the datasheet.

Can S6BT112A01SSBB202 operate without an external clock source?

Yes - it includes an internal RC oscillator that supports all bit rates from 2.4 kbps to 20 kbps without external clocking. The CLK pin serves as clock output in slave mode or input in master mode, but external clock is optional, not mandatory, for basic operation.

How does the SELMS pin affect CLK pin behavior?

When SELMS = low (master), CLK is a clock input accepting external timing reference; when SELMS = high (slave), CLK becomes an open-drain clock output synchronized to the received bit stream. This dual-role design eliminates need for separate clock distribution hardware in slave nodes.

Is the BUS pin protected against reverse battery connection?

No - the BUS pin is not reverse-battery protected. The device relies on system-level protection (e.g., fuse, diode, or PMIC) for reverse polarity. However, BUS tolerates ±40 V transients and short-to-VBAT faults, and includes overcurrent shutdown to prevent latch-up during bus shorts.