SIT1021QT

Mfr. #:
SIT1021QT
Mfr.:
SIT
Product Type:
LIN Transceiver
Series:
SIT1021Q
Package / Case:
SOP-8
Description:
20 kBd LIN transceiver with a 5.5 to 27 V battery supply, local/remote wake-up and an INH regulator-control output.

Product Attributes

AttributeValue
Data Rate1 to 20 kbps (1 to 20 kBd, LIN NRZ signaling)
Supply CurrentSleep IBAT: 3 uA typical, 15 uA maximum, LIN=WAKE_N=VBAT, TXD=SLP_N=0 V. Normal recessive: 380 uA typical, 600 uA maximum. Typical VBAT=12 V, ambient 25 C
ESD ProtectionLIN, WAKE_N, VBAT and INH: HBM +/-8 kV, IEC61000-4-2 +/-4 kV
Operating Temperature-40 to +125 C ambient; -40 to +150 C junction
ProtocolLIN 2.0 / 2.1 / 2.2 / 2.2A; ISO 17987-4:2016 (12 V); SAE J2602
Transmitter / Receiver Channels1 LIN transmitter / 1 LIN receiver; single-wire physical layer
Supply Voltage (VBAT)5.5 to 27 V operating range
Logic InterfaceTXD and SLP_N high input >=2.0 V, low input <=0.8 V; RXD open-drain output; external pull-up required; no separate VIO supply pin
Bus Fault VoltageLIN pin absolute maximum -42 to +42 V
Operating ModesNormal, standby, sleep and power-on states; controlled by SLP_N
Wake-UpRemote LIN dominant wake-up 30 to 150 us, 65 us typical; local WAKE_N dominant wake-up 7 to 50 us, 22 us typical
Receiver ThresholdDominant <=0.4 x VBAT; recessive >=0.6 x VBAT
Propagation DelayReceiver delay 6 us maximum; symmetry -2 to +2 us; RXD load 20 pF with 2.4 kohm pull-up
ProtectionTXD dominant timeout 27 to 90 ms, 52 ms typical; LIN current limit; thermal shutdown; battery undervoltage
Bus TerminationInternal slave pull-up resistance 20 to 60 kohm, 30 kohm typical at VBAT=12 V; master needs external resistor and series diode
Power ManagementINH high-voltage output controls an external regulator; INH is high impedance in sleep
QualificationAEC-Q100 qualified, per manufacturer datasheet
Package Details8-pin SOP; body 4.9 x 3.9 mm typical; lead span 6.0 mm typical; pitch 1.27 mm; height 1.8 mm maximum

Product Description

SIT1021QT is a single-wire LIN transceiver for low-speed vehicle networks operating from 1 to 20 kBd. It accepts the controller's TXD data and returns bus data through an open-drain RXD output, which needs an external pull-up. Its battery supply operates from 5.5 to 27 V; there is no separate VIO supply pin.

A local WAKE_N event or a remote dominant pulse on LIN can wake the node. The INH output enables an external regulator after wake-up and becomes high impedance in sleep, providing a way to switch the MCU supply. The specified sleep battery current is 3 uA typical with the LIN bus recessive.

The internal slave termination is typically 30 kohm. A LIN master requires an additional external pull-up resistor and series diode, so choosing this SOP-8 transceiver does not by itself complete the master termination network.

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