Infineon Technologies S6BT112A01SSBB002

Overview

S6BT112A01SSBB002 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, direct 5.3–18 V battery operation, and includes Spread Spectrum Clock Generator (SSCG) for master-node EMI reduction.

For engineers reviewing the S6BT112A01SSBB002 datasheet, S6BT112A01SSBB002 pinout, S6BT112A01SSBB002 application, or S6BT112A01SSBB002 equivalent, key selection criteria include CXPI master/slave node configuration via SELMS, BUS pin ±40 V tolerance, 6 µA typical sleep current (slave), SSCG enablement, and AEC-Q100 Grade-1 qualification for under-hood deployment.

Technical Context

The S6BT112A01SSBB002 implements a full-duplex CXPI PHY with integrated LDO regulator, RC oscillator, and thermal shutdown circuitry. It operates in three modes-Normal, Standby, and Sleep-with mode transitions controlled by NSLP and internal state logic, and enforces strict prohibition on SELMS toggling during active transmission.

Master node operation enables CLK output (open-drain, requires external pull-up) at baud-rate frequency (e.g., 20 kHz → 20 kbps), while slave node configures CLK as input. BUS pin features ±40 V voltage tolerance, overcurrent protection, and <±1 mA leakage during loss-of-ground conditions.

Key Specifications

Pinout & Package

Package: Halogen-free 8-pin SOIC (SOIC-8, 150 mil width), JEDEC MS-012AC, body size 4.9 mm × 3.9 mm, lead pitch 1.27 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TJA1122 and UJA1169, S6BT112A01SSBB002 delivers superior EMI control via on-chip SSCG, highest bus surge resilience (±40 V), and lowest slave-mode sleep current-making it optimal for space-constrained, battery-direct, master/slave endpoint nodes in modern CXPI networks.

Availability

S6BT112A01SSBB002 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 S6BT112A01SSBB002 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 ICs, and security solutions, with global R&D and manufacturing infrastructure.

The S6BT112A01SSBB002 belongs to Infineon's automotive connectivity portfolio, designed specifically to enable robust, low-cost, single-wire CXPI networks for distributed body electronics-replacing legacy LIN where higher noise immunity and deterministic timing are required.

FAQ

What is the functional difference between S6BT112A01 and S6BT112A02?

S6BT112A01 integrates a Spread Spectrum Clock Generator (SSCG) for EMI reduction in master-node applications, while S6BT112A02 omits this feature. Both share identical pinout, electrical specs, package, and compliance certifications. The SSCG in S6BT112A01 modulates the CLK output frequency by ±1% to spread spectral energy, lowering peak radiated emissions without affecting protocol timing integrity.

How does the SELMS pin determine master vs. slave operation?

SELMS is a static configuration pin sampled at power-up reset. When held low, the device initializes as master: CLK becomes an open-drain output synchronized to baud rate, and internal timing derives from RC oscillator or external clock. When high, it initializes as slave: CLK becomes an input, and the device synchronizes to incoming master clock. Changing SELMS during operation is prohibited and may cause bus errors.

Can S6BT112A01SSBB002 operate without an external pull-up resistor on RXD or CLK?

No. Both RXD and CLK pins are open-drain outputs requiring external pull-up resistors (typically 4.7 kΩ to VCC or BAT). Omitting them results in undefined logic levels, failed communication, and potential bus contention. Table 7-1 in the datasheet specifies 3.3 V or 5 V pull-up targets depending on MCU interface voltage, and recommends placement within 10 mm of the IC pad.

Is the BUS pin internally terminated, or does it require external termination resistors?

The BUS pin has no internal termination; CXPI bus termination is implemented externally at the network ends using two 120 Ω resistors (one at each end of the daisy-chain). The S6BT112A01SSBB002 provides only the physical driver/receiver stage-no biasing or termination-ensuring compatibility with multi-drop topologies and allowing precise impedance matching per vehicle harness design.