l9637 STMicroelectronics, l9637 Datasheet

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l9637

Manufacturer Part Number
l9637
Description
Iso 9141 Interface
Manufacturer
STMicroelectronics
Datasheet

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0
BLOCK DIAGRAM
September 2002
OPERATING POWER SUPPLY VOLTAGE
RANGE 4.5V
SIENTS)
REVERSE
TECTED DOWN TO V
STANDBY MODE WITH VERY LOW CUR-
RENT CONSUMPTION IS
LOW QUIESCENT CURRENT IN OFF CON-
DITION IS
TTL COMPATIBLE TX INPUT
BIDIRECTIONAL K-I/O PIN WITH SUPPLY
VOLTAGE DEPENDENT INPUT THRESHOLD
OVERTEMPERATURE SHUT DOWN FUNC-
TION SELECTIVE TO K-I/O PIN
WIDE
RANGE -24V V
K OUTPUT CURRENT LIMITATION, TYP I
60mA
DEFINED OFF OUTPUT STATUS IN UNDER-
VOLTAGE CONDITION AND VS OR GND IN-
TERRUPTION
CONTROLLED OUTPUT SLOPE FOR LOW
EMI
HIGH INPUT IMPEDANCE FOR OPEN V
GND CONNECTION
INPUT
®
OFF
SUPPLY
= 120 A
VS
LI
K
K
V
AND
S
V
S
S
36V (40V FOR TRAN-
OUTPUT
-24V
(BATTERY)
SB
1 A @ V
IK
VOLTAGE
IL I
O F F
CC
0.5V
PRO-
S
K
OR
=
-
+
+
-
DESCRIPTION
The L9637D is a monolithic integrated circuit con-
taining standard ISO 9141 compatible interface
functions.
DEFINED OUTPUT ON STATUS OF LO OR
RX FOR OPEN LI OR K INPUTS
DEFINED K OUTPUT OFF FOR TX INPUT
OPEN
INTEGRATED PULL UP RESISTORS FOR
TX, RX AND LO
EMI ROBUSTNESS OPTIMIZED
+
-
R T X
ORDERING NUMBER: L9637D
1 , 7 5 V
ISO 9141 INTERFACE
R L O
R R X
SO8
VCC
TX
RX
LO
GND
L9637D
1/10

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l9637 Summary of contents

Page 1

... DEFINED OUTPUT ON STATUS FOR OPEN INPUTS VOLTAGE DEFINED K OUTPUT OFF FOR TX INPUT OPEN = K INTEGRATED PULL UP RESISTORS FOR TX, RX AND LO EMI ROBUSTNESS OPTIMIZED DESCRIPTION The L9637D is a monolithic integrated circuit con taining standard ISO 9141 compatible interface functions ...

Page 2

... L9637D ABSOLUTE MAXIMUM RATINGS (No damage or latch) Symbol V Supply Voltage S ISO transients t = 400ms V Stabilized Voltage CC V /dt Supply Voltage transient S V Pin Voltage LI Pin Voltage LO, RX, TX Note: Max. ESD voltages are 2kV with human body model C = 100pF 1.5k corresponds to maximum energy dissipation 0.2mJ according to MIL883C ...

Page 3

... LO output status LOW 18V < output status HIGH 0.55V 4.5V V 18V S LO output status HIGH 18V < VLI - VLI high low VLI open S CC L9637D tem- JSDon Min. Typ. Max. Unit 4 -40 150 C 1.4 2 < 1 120 220 A < ...

Page 4

... L9637D ELECTRICAL CHARACTERISTIC (continued) Symbol Parameter C Internal output capacities Ki, LO Transmission Frequency LI-LO f K-RX f TX-k t Rise Time rLI-LO t rK-RX t rTX-K t Fall Time fLI-LO t fK-RX t fTX-K t Switch OFF time OFF,LI-LO t OFF,K-RX t OFF,TX-K t Switch ON time ON,LI-LO t ON,K-RX t ON,TX-K 1) For output currents lower than this value a series protection diode can become active. See also Fig. 4 and 5. ...

Page 5

... Ohm K Diagnostic 0.4 Ohm Tester L FUNCTIONAL DESCRIPTION The L9637D is a monolithic bus driver designed to provide bidirectional serial communication in automotive diagnostic applications according to the specification "Diagnostic Systems ISO9141". The device provides a bidirectional link, called K, to the V related diagnosis bus. It also includes Bat ...

Page 6

... L9637D Supressing all 4 classes of "Schaffner" signals all pins can be load with short energy pulses of max. 0.2mJ. All these features together with a high possible baud rate >50Kbaud, controlled output slopes for low EMI, a wide power supply voltage range and a very small quiescent current during ...

Page 7

... V OUT = tio OUT = > < > L9637D 7/10 ...

Page 8

... L9637D Figure 6: EMS Performance (ISO 9141 BUS system Ohm rfa rfa c e Signal comparison 10 D£ Figure ...

Page 9

... D and F do not include mold flash or protrusions. Mold flash or potrusions shall not exceed 0.15mm (.006inch). inch MIN. TYP. MAX. 0.069 0.004 0.010 0.065 0.026 0.033 0.014 0.019 0.007 0.010 0.010 0.020 0.189 0.197 0.228 0.244 0.050 0.150 0.15 0.157 0.016 0.050 0.024 OUTLINE AND MECHANICAL DATA SO8 L9637D 9/10 ...

Page 10

... L9637D Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice ...

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