TH8065KDCAA MELEXIS [Melexis Microelectronic Systems], TH8065KDCAA Datasheet - Page 13

• Manufacturer Part Number: TH8065KDCAA
• Description: Voltage Regulator with LIN Transceiver and Watchdog
• Manufacturer: MELEXIS [Melexis Microelectronic Systems]

3. Functional Description
The TH8065 consists of a low drop voltage regulator 5V/70mA 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 unit with a power-on-reset delay of 8ms (optional 4,15 or 30ms).
and a programmable watchdog time which will be defined by an external capacity.
3.1 Operating Modes
The TH8065 provides three main operating modes “normal”, “sleep” and “low slew” and the intermediate
states “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.
TH8065 – Datasheet
3901008065
UVR / POR
VSUP power on
VSUP < UVR_ON
VSUP < UVR_ON
Regulator off
Thermal shutdown off
Wake-up enabled (LIN-Receiver on)
LIN-Transmitter off
Set Slew_State = L
VSUP > UVR_OFF
VSUP > UVR_ON &
BUS Wake-up
Ini-state
Sleep-
Mode
Figure 5 - State diagram of operating modes
clear Reset-Timer
Start Regulator -> VCC ramp up
RESET = L
Wake-up disabled
EN= H/L
Voltage Regulator with LIN Transceiver and Watchdog
EN=L
VCC > Vres (4.65V) &
Slew_State=L
VCC > Vres (4.65V) &
Slew_State=H
VCC < Vres
VCC < Vres
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EN= H/L
EN= L/H edge & TxD=L
Regulator on
RESET = L / after tres RESET=H
and Watchdog activated
Wake-up disabled
Set Slew State = H
LIN-Transceiver on/ low slew mode
Regulator on
RESET = L / after tres RESET=H
and Watchdog activated
Wake-up disabled
LIN-Transceiver on/ normal slew mode
Low Slew
Normal-
Mode
Mode
Tj > Tjshd
Tj < Tjrec
EN= L/H edge & TxD=H
TH8065
Tj > Tjshd
shutdown
Regulator off
Wake-up disabled
LIN-Transceiver off
thermal
Tj > Tjshd
May 2006
Rev 003