TH8061

Voltage Regulator with integrated LIN Transceiver

3. Functional Description

The TH8061 consists of a low drop voltage regulator 5V/50mA and a LIN bus transceiver, which is a bi-

directional bus interface for data transfer between LIN bus and the LIN protocol controller.

Additionally integrated is a RESET output with a reset delay of 100ms and a fixed threshold of 4.65V.

3.1

Operating Modes

The TH8061 provides two main operating modes “normal” and “sleep” and the intermediate states “POR”,

“Ini-state” and “thermal shutdown”. The main modes are fixed states defined by basic actions (VSUP start,

EN or wake-up). The intermediate states are soft states. They aren’t defined by logical actions but by

changes of voltage (VSUP, VCC) or junction temperature.

Ini-state

EN=H

Sleep-

Mode

EN= H/L

VSUP > UVR_OFF &

(EN= L/H or BUS Wake-up)

EN=L

VSUP > UVR_OFF

VSUP < UVR_ON

VSUP < UVR_ON

normal mode &

normal mode &

sleep mode &

sleep mode &

clear reset timer

Regulator On -> VCC ramp up

RESET = L

Wake-up disabled

Regulator on

RESET = L after 100ms

RESET=H

Wake-up disabled

LIN-Transceiver on

Regulator off

Wake-up disabled

LIN-Transceiver off

Normal-

Mode

thermal

shutdown

Regulator off

Wake-up enabled (LIN-Receiver on)

LIN-Transmitter off

VSUP power on

clear all state-FF

POR

Figure 10 - State diagram of operating modes

TH8061 – Datasheet

Page 13 of 36

3901008061

June 2004

Rev 007