MELEXIS TH3044JDC, TH3044.3A Datasheet

Features and Benefits

TH3044

www.melexis.com

Page 1 Datasheet Rev 1.1 July 2001

q Open-emitter output with slew rate control
q Quiescent current < 50mA
q Bus voltage range -16 V .. +30 V
q ISO 9141 and OBDII compliant
q Wide temperature range -40 .. 125 °C
q SOP-14 or SOP-8 package
q Baudrate 9600
q Automotive applications

Ordering Information

Part No. Temperature Range Package

TH3044.3A -40ºC...125ºC SOIC14, 150mil
TH3044 JDC -40ºC...125ºC SOIC8

K-Bus Interface

General Description

The TH3044 is a bidirectional bus interface
device for data transfer from 5V to 12V supply.
For proper functionality control units are
implemented.

This interface device was especially designed
for automotive applications.

Pin Diagram

SOIC14NB

TH3044

1

VCC

GND

RXD

NRXD

BUS

VBAT

SEN/STA

TxD

14

13

12

11

10

9

87

6

5

4

2

3

TH3044

1

VCC

GND

RXD

NRXD

BUS

VBAT SEN/STA

TxD

8

7

6

54

2

3

SOIC 8

TH3044

K-Bus Interface

www.melexis.com

Page 2 Datasheet Rev 1.1 July 2001

All voltages are referenced to ground (GND). Positive
currents flow into the IC. The absolute maximum ratings
(in accordance with IEC 134) given in the table below are
limiting values that do not lead to a permanent damage
of the device but exceeding any of these limits may do

Electrical Characteristics

Absolute maximum ratings

so. Long term exposure to limiting values may affect the
reliability of the device. Reliable operation of the TH3044
is only specified within the limits shown in ”Operating
conditions”

Operating Conditions

Parameter Symbol Min Typ Max Unit

Battery Voltage V

BAT

6 16 V
Supply Voltage VCC 4.5 5.5 V
Operating Temperature TA -40 125 °C

Parameter Symbol Condition Min Max Unit

Battery Voltage V

BAT

-0.3 30
V

T ≤ 500 ms

40

Battery Current I

BAT

20 mA
Supply Voltage VCC 7 V
Supply Current ICC 10 mA
Input Voltage SEN/STA,TxD VIN -0.3 VCC+0.3 V
Input Current SEN/STA, TxD IIN -10 10 mA

Input Voltage BUS V

INBUS

-16 30
V

T ≤ 500 ms

40

Output Current RxD, NRxD I

OUT

-10 10 mA

Operating Temperature TA -40 125 °C

TH3044

K-Bus Interface

www.melexis.com

Page 3 Datasheet Rev 1.1 July 2001

Static Characteristics

VDD= 4.5 to 5.5V, V

Bat

= 6 to 16V, T

amb

= -40°C to +125°C, unless otherwise specified

Parameter

Symbol Condition Min Typ Max Unit

Supply

Power-on-reset Threshold VCC V

CCPOR

3.0 4.0 V

Power-on-reset Threshold VBAT V

BATPOR

3.0 4.5 V

Quiescent Current, ICC + IBAT I

CCBAT

VCC = 5V, VBAT = 12V,
BUS, TxD, SEN/STA, RxD
and NRxD open

50

µA

TxD, SEN/STA, RxD, NRxD

Pull-up Current TxD Ipu -330 -250 -170

µA

Pull-down Current SEN/STA I

pdSEN

170 250 330

µA

Pull-up Current SEN/STA I

puSEN

-330 -250 -170

µA

Input Voltage Low TxD, SEN/STA VIL 0.25 VCC
Input Voltage High TxD, SEN/STA VIH 0.75 VCC

Output Voltage Low RxD, NRxD VOL I

OUT

= 1 mA 1 V

Output Voltage High RxD, NRxD VOH I

OUT

= 1 mA VCC -1.0 V

BUS

Input Voltage Low BUS VIL 0.45 V

BAT

Input Voltage High BUS VIH 0.55 V

BAT

Hysteresis Input Voltage V

HYS

50 mV

Input Resistance BUS R

IN

V

BAT

= 0..40V 400 600 1500

kΩ

V

BAT

= 0..40V, TA = 85°C 1300

kΩ

V

BUS

= 12V 60

kΩ

Output Voltage BUS V

BUS

VBAT = 12V,
SEN/STA = Low,
I

BUS

= 40mA

1.2 V

I

BUS

= 25mA 1.0 V

Output Sinking Current BUS (current
limiting)

I

LIM

V

BUS

> 3.5V 40 110 mA

Output Sinking Current BUS (before fold
back)

I

BUS

180 mA