L9637D013TR ,ISO INTERFACEelectrical characteristics are valid within the below defined op-erating conditions, unless otherwi ..
L9638D ,LIN BUS TRANSCEIVERElectrical Characteristics (V = 6V to 26V; T = -40 to 150 °C unless otherwise specified)S J Item Sy ..
L9638D013TR ,LIN BUS TRANSCEIVERElectrical Characteristics (continued)(V = 6V to 26V; T = -40 to 150 °C unless otherwise specified ..
L9638D013TR ,LIN BUS TRANSCEIVERBlock DiagramVS VS VSVS VS_ _D DIn In Int t te e ern rn rna a alllIn In Int. t. t.5 5 5V V VVo Vo V ..
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L9651-TR ,SMART QUAD SWITCHL9651SMART QUAD SWITCH■ Modified VDMOS Power Stage (U > 80V)DSBR■RDSON < 500 mOhm (T = 25°C) j■CMOS ..
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LC74411NE ,PIP ControllerOrdering number : EN*5519ACMOS LSILC74411N, LC74411NEPIP ControllerPreliminaryOverview Package Dime ..
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L9637D013TR
ISO INTERFACE
L9637DISO 9141 INTERFACE
OPERATING POWER SUPPLY VOLTAGE
RANGE 4.5V ≤ VS ≤ 36V (40V FOR TRAN-
SIENTS)
REVERSE SUPPLY (BATTERY) PRO-
TECTED DOWN TO VS ≥ -24V
STANDBY MODE WITH VERY LOW CUR-
RENT CONSUMPTION ISSB 1μA @ VCC 0.5V
LOW QUIESCENT CURRENT IN OFF CON-
DITION ISOFF = 120μA
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 INPUT AND OUTPUT VOLTAGE
RANGE -24V ≤ VK ≤ VS
K OUTPUT CURRENT LIMITATION, TYP IK =
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 VS OR
GND CONNECTION
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
DESCRIPTIONThe L9637D is a monolithic integrated circuit con-
taining standard ISO 9141 compatible interface
functions.
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS (No damage or latch)
Note: Max. ESD voltages are ±2kV with human body model C = 100pF, R = 1.5k corresponds to maximum energy dissipation 0.2mJ accordingto MIL883C.
THERMAL DATA
PIN DESCRIPTION
PIN CONNECTION (Top view)
L9637D2/10
ELECTRICAL CHARACTERISTICS (The electrical characteristics are valid within the below defined op-erating conditions, unless otherwise specified. The function is guaranteed by design until TJSDon tem-
perature shutdown switch-on-threshold.)
L9637D3/10
ELECTRICAL CHARACTERISTIC (continued)
1) For output currents lower than this value a series protection diode can become active. See also Fig. 4 and 5.
Figure 1: Input to Output Timings and Output Pulse Shape.
L9637D4/10
FUNCTIONAL DESCRIPTIONThe 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 VBat related diagnosis bus. It also includes
a separate comparator L which is also able to be
linked to the VBat bus. The input TX and output
RX of K are related to VCC with her integrated pull
up resistances. Also the L comparator output LO
has a pull up resistance connected to VCC.
The maximum external pull up resistance at K re-
lated to VS should not be higher than RKO ≤ 5KΩ
to achieve clear output ON conditions.
All VBat bus defined inputs LI and K have supply
voltage dependent thresholds together with suf-
ficent hysteresis to suppress line spikes. These
pins are protected against overvoltages, shorts to
GND and VS and can also be driven beyond VS
and GND. These features are also given for TX,
RX and LI only taking into account the behaviour
of the internal pull up resistances. The thermal
shut down function switches OFF the K output if
the chip temperature increases above the thermal
shut down threshold. To reactivate K again the
chip temperature must decrease below the K
switch ON temp. To achieve no fault for VS under-
voltage conditions the outputs will be switched
OFF and stay at high impedance. The device is
also protected against reverse battery condition.
During lack of VS or GND all pins shows high im-
pedance characteristic. To realize a lack of the VS
related bus line LI and K the outputs LO and RX
shows defined ON status.
Figure 2: ISO Application Circuit
L9637D5/10
Figure 3: Typical timing for mode transitions.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
OFF (TX LI K=High) condition ISoff typ ≤ 120μA,
and a real standby function with zero power con-
sumption ISSB typ ≤ 1μA during system depower-
ing VCC ≤ 0.5V make this device high efficient for
automotive bus system.
After wake up of the system from OFF or SB
condition the first output signal will have an addi-
tional delay time tdtyp ≤ 5μs see also Fig. 3.
The typical output voltage behaviour for the K,
LO, RX outputs as a function of the output current
is shown in Fig.4. Fig.5 shows a waveform of the
output signal when the low level changes from
RON * IOUT to IOUT * 2 * RON + UBE state. This vari-
ation occurs due to too low output current or after
a negative transient forced to the output or to the
supply voltage line.
L9637D6/10
