SGS Thomson Microelectronics L9637D, L9637 Datasheet



OPERATING POWER SUPPLY VOLTAGE RANGE 4.5V ≤ V

≤ 36V (40V FOR TRAN-

S

SIENTS) REVERSE SUPPLY (BATTERY) PRO-

TECTED DOWNTOV

≥ -24V

S

STANDBY MODE WITH VERY LOW CURRENT CONSUMPTIONIS

1µA@VCC0.5V

SB

LOW QUIESCENT CURRENT IN OFF CONDITIONIS

OFF

= 120µA TTL COMPATIBLETX INPUT BIDIRECTIONAL K-I/O PIN WITH SUPPLY

VOLTAGEDEPENDENT INPUTTHRESHOLD OVERTEMPERATURE SHUT DOWN FUNC-

TION SELECTIVETO K-I/OPIN WIDE INPUT AND OUTPUT VOLTAGE

RANGE-24V≤V

V

≤

K

S

K OUTPUT CURRENT LIMITATION, TYP IK= 60mA

DEFINEDOFF OUTPUT STATUS IN UNDERVOLTAGE CONDITION AND VS OR GND INTERRUPTION

CONTROLLED OUTPUT SLOPE FOR LOW EMI

HIGH INPUT IMPEDANCE FOR OPEN V

OR

S

GND CONNECTION

L9637

ISO 9141 INTERFACE

SO8 Minidip

ORDERING NUMBERS:

L9637D L9637

DEFINED OUTPUT ON STATUS OF LO OR RXFOROPENLIOR K INPUTS

DEFINED K OUTPUT OFF FOR TX INPUT OPEN

INTEGRATED PULL UP RESISTORS FOR TX, RX AND LO

EMI ROBUSTNESS OPTIMIZED

DESCRIPTION

The L9637 is a monolithic integrated circuit containing standard ISO 9141 compatible interface functions.

BLOCK DIAGRAM

December 1998

VS

RTX RLO RRX

K

IK

OFF

+

LI

ILI

+

-

+

1,75V

VCC

TX

RX

LO

GND

1/11

L9637

ABSOLUTE MAXIMUM RATINGS (Nodamage or latch)

Symbol Parameter Value Unit

V

S

Supply Voltage ISO transients t = 400ms

V

CC

/dt Supply Voltage transient -10 to +10 V/µs

∆V

S

V

LI, K

V

LO, RX, TX

Note: Max. ESD voltages are ±2kV withhuman body model C= 100pF,R = 1.5k corresponds to maximumenergy dissipation0.2mJaccording to MIL883C.

Stabilized Voltage -0.3 to +7 V

Pin Voltage -24 to V Pin Voltage -24 to V

PIN CONNECTION(Top view)

RX

LO

1

2

8

LI

7

VS

-24 to +36

-24 to +40

CC

V V

S

V V

U537

VCC

TX

3

45

6

K

GND

THERMAL DATA

Symbol Parameter Min. Typ. Max. Unit

T

JSDon

T

JSDoff

R

th j-amb

Temperature K shutdown switch on threshold Temperature K shutdown switch off threshold

Thermal steady state junction to ambient resistance for SO8 Thermal steady state junction to ambient resistance for Minidip

160 150

130

80

155 100

200 200

180 120

PIN DESCRIPTION

N. Name Function

1 RX Output for K as input 2 LO Output L comparator 3 VCC Stabilized voltage supply 4 TX Input for K as output 5 GND Common GND 6 K Bidirectional I/O 7 VS Supply voltage 8 LI Input L comparator

°C

C

°

C/W

° °C/W

2/11

L9637

ELECTRICALCHARACTERISTICS (The electrical characteristicsare valid within the below defined op-

erating conditions, unless otherwise specified. The function is guaranteed by design until T peratureshutdown switch-on-threshold.)

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

S

V

CC

T

j

I

CC

IS

ON

IS

OFF

IS

SB

VK

low

VK

high

VK

hys

IK

off

RK

ON

IK

SC

VTX

RRX RLO

IRX ILO

VRX

VLO

RLO RRX

RTX Input pull up resistance -0.15V≤VTX≤V

VLI

low

VL

high

VLI

hys

Supply Voltage 4.5 36 V Stabilized Voltage 3 7 V Junction temperature -40 150 °C Supply VCCCurrent V

5.5V; VLI,VTX = 0V 1.4 2.3 mA

≤

CC

VK≥VK

; VLI≥VLI

high

-5 <1 5

VTX = VCC@VCC≤ 5.5V

Supply VS Current VS≤ 16V; VLI, VTX = 0V 1.2 3 mA

VK ≥ VK VTX≥VTX

V

CC

Input Voltage Low state RX output status LOW

4.5V ≤ V RX output status LOW

18V < V

Input Voltage High state RXoutput status HIGH

4.5V≤V RX output status HIGH

18V < V

Input Threshold Hysteresis VK

high

Input Current @ VTX≥VTX

high

0.5V @ V

≤

S

-VK

; VLI ≥ VLI

high@VS

S

≤ 18V

18V

≤

low

high

12V

≤

12V <1

≤

-24 0.45V

-24 8 V

0.55V

S

12 V

-5 4 25

120 220 µA

0.025 V

S

VK ≤ VSVS,VCC≥ 0or

V

Output ON Impedance @ VS≥ 6.5V

VTX≤ VTX

S,VCC

low

= open

10 30 Ω

IK≥ 7mA 1) Short Circuit Current 30 60 100 mA Input voltage LOW state -24 1 V

low

Input voltage HIGH state 2.5 V

high

Output ON Impedance VK ≤ VK

ON ON

Output Short Circuit Current 9 20 35 mA

SC SC

Output Voltage HIGH state 10MΩ ≤ R

H

V

S

10MΩ ≤ R

6.5V I

≥

;VLI≤VLI

low

RX, LO

LRX LLO

low

1mA 1) 40 90

≥

VCC-

0.25

VCC-

0.1

Output pull-up resistance Output status = (HIGH)

-0.15V ≤ VLO ≤ V

-0.15V ≤ VRX ≤ V

Input voltage LOW state LO output status LOW

4.5V ≤ V

≤ 18V

S

LO output status LOW 18V < V Input voltage HIGH state LO output status HIGH

4.5V ≤ V

≤ 18V

S

LO outputstatusHIGH 18V < V Input threshold hysteresis VLI

high

- VLI

low

+ 0.15V

CC

+ 0.15V

CC

+ 0.15V 10 20 40 K

CC

51020KΩ

-24 0.45V

-24 8 V

S

0.55V

S

12 VS V

S

0.025VS0.8 V

V

S

0.8 V

CC

V

CC

VS V

JSDon

S

tem-

A

µ

A

µ

V

A

µ

V

Ω

V

Ω

V

ILI Input current VLI ≤ V

SVS,VCC

V

S,VCC

≥ 0or

= open

-5 4 25 µA

3/11

L9637

ELECTRICALCHARACTERISTIC (continued)

Symbol Parameter Test Condition Min. Typ. Max. Unit

C

Ki, LO,RX

f

LI-LO

f

K-RX

f

TX-k

t

rLI-LO

t

rK-RX

t

rTX-K

t

fLI-LO

t

fK-RX

t

fTX-K

t

OFF,LI-LO

t

OFF,K-RX

t

OFF,TX-K

t

ON,LI-LO

t

ON,K-RX

t

ON,TX-K

1) For outputcurrents lower than this value a series protection diode can become active. See also Fig. 4 and 5.

Internal output capacities 20 pF Transmission Frequency 9V < VS< 16V

(external loads)

R

= 510Ω,CK≤1.3nF

KO

50 100 kHz

in active mode see Fig. 3 Rise Time for the definition of tr, tfsee

Fig.1.

Fall Time

9V < V

R

< 16V (external loads)

S

= 510Ω,CK≤1.3nF

KO

Switch OFF time for the definition of ton, t

Fig.1.

Switch ON time

9V < V

R

< 16V (external loads)

S

= 510Ω,CK≤1.3nF

KO

(inactive mode see Fig. 3)

OFF

see

26µs

417

417µs

s

µ

Figure 1:

Input to OutputTimings and Output Pulse Shape.

V

I

V

OUT

80% 80%

20%

t

20%

4/11

t

OFF

t

r

t

f

t

ON

t