FN8861 Rev. 1.00

Page 22 of 28

Jul 27, 2017

ISL72026ASEH

4. Functional Description

4.5

Listen Mode

When a high level is applied to the RS pin, the device enters Low Power Listen mode. The driver of the transceiver

is switched off to conserve power while the receiver remains active. In Listen mode, the transceiver draws 2mA

(max) of current.

A low level on the RS pin brings the device back to normal operation.

4.6

Loopback Mode

When a high level is applied to the LBK pin, the device enters the loopback state. The transceiver CANH and

CANL pins are disconnected from the bus. The driver and receiver circuitry of the transceiver remains active to

allow for diagnostic testing of the node.

4.7

Using 3.3V Devices in 5V Systems

The differential voltages and common-mode outputs are the same for both the 3.3V and 5V devices. The dominant

common-mode output voltage for the 3.3V device is slightly lower than that of the 5V counterparts. The receiver

specifications for both devices are also the same. Although the electrical parameters appear compatible, perform

necessary system testing to verify interchangeable operation.