4Mbps CAN FD µModule Announced

Linear Technology Korea (CEO Hong Sa-kwak) announced the release of a new CAN (controller area network) µModule® transceiver and isolator (product name: LTM2889) that fully complies with ISO 11898-2 standards and protects against wide ground-to-ground differential and common mode transients in 3.3V or 5V applications.

In actual CAN systems, ground potential varies greatly from node to node and sometimes exceeds acceptable limits, which can cause communication interruptions or transceiver failures.

The LTM2889 isolates ground by isolating the CAN transceiver using internal inductive isolation. This enables various levels of protection that significantly improve system reliability, such as galvanic isolation of 2,500 VRMS, bus voltage fault tolerance of ±60 V, common mode transient immunity (CMTI) of 30 kV/µs or more, and ±25 kV HBM ESD protection.

The LTM2889 integrates a low EMI DC/DC converter that powers isolated transceivers and supplies 0.75W of isolated power to CAN node components. In addition to these numerous internal protection features, this device supports a wide common-mode range of ±36V, enabling operation even in environments with high electrical noise and situations with ground loops.

The LTM2889 operates at data rates from 22kbps to 4Mbps, and since the slew rate is adjustable, EMI can be reduced at lower data rates. In shutdown mode, all outputs of the LTM2889 become high-impedance, and power consumption is reduced to 1µA or less.

The LTM2889 is available in commercial, industrial, and automotive temperature grades and is supplied in a low-profile 15mm x 11.25mm x 3.42mm surface-mount BGA package. All ICs and passive components are integrated into Linear Technology's RoHS-compliant µModule package. Pricing starts at $9.96 per unit for 1,000-unit quantities. The LTM2889 belongs to the µModule isolator family, which includes isolated RS485, RS232, USB, SPI, I²C, and GPIO.