NXP Semiconductors SJA1000T/N1,112

Overview

SJA1000T/N1,112 from NXP Semiconductors (formerly Philips) is a stand-alone CAN 2.0B controller IC supporting both BasicCAN and PeliCAN modes, with 64-byte RX FIFO, 1 Mbit/s bit rate, 24 MHz clock input, and −40 to +125 °C operating temperature - used in automotive body control modules for robust vehicle network communication.

For engineers reviewing the SJA1000T/N1,112 datasheet, SJA1000T/N1,112 pinout, SJA1000T/N1,112 application, or SJA1000T/N1,112 equivalent, key selection considerations include CAN 2.0B protocol support, dual-mode register compatibility, programmable bus timing, open-drain INT output, and SO28 package suitability for space-constrained industrial CAN nodes.

Technical Context

The SJA1000T/N1,112 implements two distinct operational modes: BasicCAN (PCA82C200-compatible, default on reset) for legacy 11-bit identifier support, and PeliCAN mode enabling full CAN 2.0B compliance including 29-bit identifiers, error counters with read/write access, and arbitration lost capture with bit-position detail.

Its architecture integrates Interface Management Logic (IML), Bit Stream Processor (BSP), Bit Timing Logic (BTL) with programmable synchronization jump width and time segments, and Error Management Logic (EML) - all synchronized to a 24 MHz crystal oscillator and configurable via BTR0/BTR1 registers for precise bit timing calibration across varying bus lengths and node counts.

Key Specifications

Pinout & Package

Package: SO28 (plastic small outline, 28 leads, 7.5 mm body width, SOT136-1).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CAN controller applications.

Compared with MCP2515-I/SO and TJA1050T/CM, the SJA1000T/N1,112 uniquely delivers parallel-microprocessor integration, dual-mode CAN 2.0B compliance, and hardware-level error diagnostics - making it irreplaceable in legacy automotive and industrial designs requiring direct memory-mapped register access and deterministic interrupt latency.

Availability

SJA1000T/N1,112 is available at Aetrix Electronics and suitable for automotive body control units, industrial PLC gateways, medical diagnostic ports, and off-highway telematics systems requiring stable component supply across extended product lifecycles.

Supply support for SJA1000T/N1,112 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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in CAN technology dating to Philips' original PCA82C200.

The SJA1000T/N1,112 belongs to NXP's legacy CAN controller product line, designed specifically for robust, pin-compatible migration from PCA82C200 in automotive and industrial control systems requiring long-term availability and proven field reliability.

FAQ

What is the primary function of the SJA1000T/N1,112 in a CAN network?

The SJA1000T/N1,112 serves as a stand-alone CAN protocol controller that handles message framing, arbitration, error detection, and filtering - interfacing between a host microcontroller and an external CAN transceiver. It implements both BasicCAN and PeliCAN modes, enabling compatibility with legacy systems and full CAN 2.0B functionality. The SJA1000T/N1,112 does not include physical layer drivers; those require a separate transceiver such as TJA1050.

Does the SJA1000T/N1,112 support 29-bit extended CAN identifiers?

Yes, the SJA1000T/N1,112 supports 29-bit extended identifiers exclusively in PeliCAN mode. In BasicCAN mode (default on reset), it operates with 11-bit standard identifiers only and passively acknowledges extended frames without generating receive interrupts. To use extended IDs, software must configure the CAN-mode bit in the Clock Divider Register (CDR) to enter PeliCAN mode and initialize the corresponding acceptance filter registers.

What is the maximum bit rate supported by the SJA1000T/N1,112?

The SJA1000T/N1,112 supports a maximum bit rate of 1 Mbit/s, achievable with appropriate bus timing configuration using BTR0 and BTR1 registers and a 24 MHz crystal. Actual achievable bit rate depends on bus length, node count, and termination; for example, 500 kbit/s is typical for 100 m bus lengths, while 1 Mbit/s is validated for ≤40 m with proper impedance matching and stub minimization.

How does the SJA1000T/N1,112 handle power management and wake-up events?

The SJA1000T/N1,112 supports sleep mode via the Go-To-Sleep (GTS) command in the Command Register. It wakes automatically on bus activity (dominant level detected on RX0/RX1), INT pin assertion, or external RST deassertion. During wake-up, the oscillator restarts and a wake-up interrupt is generated. The SJA1000T/N1,112 maintains CLKOUT for ≥15 bit times after GTS activation to allow synchronized MCU standby entry.

Can the SJA1000T/N1,112 operate without an external crystal?

No, the SJA1000T/N1,112 requires an external 24 MHz crystal connected between XTAL1 and XTAL2 (with 15 pF load capacitors to VSS1), or an external 24 MHz clock signal applied to XTAL1 while leaving XTAL2 open. The internal oscillator cannot function without this timing source, and no internal RC oscillator is provided. Omitting the crystal or clock signal results in complete functional failure of the CAN controller logic.