SGS Thomson Microelectronics L9705D Datasheet

L9705

DOUBLE QUAD CONTACT INTERFACE CIRCUIT

ADVANCE DATA

OPERATINGDC SUPPLY VOLTAGE RANGE
5V TO 25V

SUPPLYOVERVOLTAGEPULSEUP TO 40V
VERY LOW STAND-BY QUIESCENT CUR-

RENT, MAX50µA
INTERNALCLAMPINGDIODESAT CONTACT

INPUTS TO Vs AND gnd WITH PULSE CUR­RENT CAPABILITYUPTO +50mA,-75mA

CHIP ENABLE FUNCTION AND TRISTATE
OUTPUTS FOR PARALLELBUS CONNECTION

NOMINAL CONTACT CURRENTS OF 10mA
DEFINED WITH EXTERNAL CONTACT SE­RIES RESISTORSR

IN1-8

CONTACT STATUS MONITORING BY
MEANS OF COMPARING THE RESISTANCE
AT CONTACT SENSE INPUTS WITH THE IN­TERNAL REFERENCERESISTORVALUE

RESISTANCE COMPARING WITH HYSTER­ESIS FOR HIGH NOISE IMMUNITY AND IM­MUNITY TO GROUND AND BATTERY PO­TENTIALDIFFERENCES

DESCRIPTION

The L9705 is a bipolar monolithic integrated cir­cuit for monitoring the status of up to four con­tacts connected to GND and up to four contacts
connectedto the battery. The contact sense input
supply the contact current and perform the con­tactresistance comparison function.

At the output the contact status is translated into
a logical LOW level (contact closed) or logical
HIGhlevel (contact open).

This isadvanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

January1992

BLOCK DIAGRAM

ORDERING NUMBERS : L9705

DIP 20 SO20L

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ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

SDC

DC Supply Voltage +26 V

V

SP

Peak Transient Supply Voltage (t < 400ms) +40 V

V

CC

Logic Supply Voltage 7 V

I

INDC

Input DC Current +40 mA

I

INP

Input Pulse(tp= 0 to 2ms; f< 0.2Hz; n = 25000) -75 to 50 mA

I

OUT

Output Current (VO = 0 to 5.5V) internally limited

V

EN

Enable Input Voltage VCC+0.3V;-0.3V V

P

tot

TotalPower Dissipation (T

amb

=80°C) DIP 20

SO 20

875
420

mW
mW

T

j

Junction Temperature Range max150 °C

PIN CONNECTION (top view)

THERMAL DATA

Symbol Description DIP20 SO20L Unit

R

th j-amb

Thermal Resistance Junction-ambient 80 °C/W

R

th j-amb

Thermal Resistance Junction-ambient 165 °C/W

L9705

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ELECTRICAL CHARACTERISTICS (VS= 5 to25V, VCC= 4.75 to 5.25V,V

bat

-0.5V <VS,<V

bat

-1V ,

Tj= –40to 150°C unless otherwisespecified.)

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

ENL

Enable Input Voltage LOW
(device activated)

-0.3 0.8 V

V

ENH

Enable Input Voltage HIGH 2.4 V

CC

V

V

ENh

Enable Input Threshold
Hysteresis

200 420 800 mV

I

EN

Enable Input Current 2.4V < VEN<V

CC

0V < VEN< 0.8V -5 -1

5 µA

µA

V

OUTH

Output Voltage HIGH 0 < I

OUT

< 100µA4V

CC

-0.1 V

CC

V

I

OUT

Output Current OUT status= HIGH; V

OUT

= 0 0.5 2 mA

V

OUTL

Output Voltage LOW I

OUT

= -1mA 0.05 0.2 0.4 V

I

OUT

Output Current OUT status= LOW; V

OUT

=5.5V -5 -20 mA

I

OUT TS

Output Tristate Current 0 < VOUT < V

CC

0.5 µA

V

IN 1,4

Input Voltage(device active) EN = LOW;RIN=1KΩ VS-2 VS-1.5 VS-0.4 V

V

IN 5,8

Input Voltage(device active) EN = LOW;RIN=1KΩ 0.4 1.5 2 V

V

IN

Input VoltageDuring Clamp
(device disabled)

EN = HIGH; IIN=30mA

I

IN

= -30mA

V

S

+0.3-2VS+1-1VS+2

-0.3

V
V

R

IL 1,4

Input Resistor LOW Threshold
(note 1)

5V < VS<16V; ∆V

GND

≤ 0.1V

S

∆V

BAT

≤ 0.1V

BAT

1.8 4 KΩ

R

IL 5,8

Input Resistor LOW Threshold
(note 1)

5V < VS<16V; ∆V

GND

≤ 0.1V

S

∆V

BAT

≤ 0.1V

BAT

1.8 4.8 KΩ

R

IH 1,4

Input Resistor HIGH Threshold
(note 1)

5V < VS< 16V; ∆V

GND

≤ 0.1V

S

∆V

BAT

≤ 0.1V

BAT

5.3 20 KΩ

R

IH 5,8

Input Resistor HIGH Threshold
(note 1)

5V < VS<16V; ∆V

GND

≤ 0.1V

S

∆V

BAT

≤ 0.1V

BAT

6.5 29 KΩ

R

IL

Input Resistor Threshold Ratio
(note 1)

5V < VS<16V; ∆V

GND

≤ 0.1V

S

∆V

BAT

≤ 0.1V

BAT

0.65 0.75 0.85

R

IH

Input Resistor Threshold Ratio
(note 1)

5V < VS<16V; ∆V

GND

≤ 0.1V

S

∆V

BAT

≤ 0.1V

BAT

0.65 0.75 0.85

I

QC

Quiescent Current EN = HIGH (t

ENH

>20µs)

V

S

= 5 to 16V; Tj= -40 to 85°C

20 40 µA

I

QS

Quiescent Current all contact open 10 µA

I

QS

Quiescent Current all contact closed 35 µA

ΣI

IN

(2) Quiescent Current ∆V

BAT

≤ 0.1V

BAT

25 µA

I

QC

Quiescent Current EN = LOW 5 mA

I

QS

Quiescent Current EN = LOW 8 mA

t

do

Delay Time/Output (EN LOW to
Output Data Ready) (note 3)

C

OUT

≤ 50pF 15+

3R

IN*CIN

µs

t

dTS

Delay Time/Tristate (EN HIGH
to Output Tristate)(note 3)

C

OUT

≤ 50pF 10 µs

t

dIO

Delay Time Input-Output (note 3) EN = LOW;C

OUT

= 50pF 6 ms

NOTES:

1) The input resistor threshold value is a resistor value from the IN-pin to ground at which the correspondingoutput changes its status (fig.4)

2) ΣI

IN

is the sum of the IN5 to IN8 input currents.

3) The delay times are defined from the crossing point of 50% initiating signal amplitude to the crossing point of 50% output signal amplitude

L9705

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