L9705

L9705 DOUBLE QUAD CONTACT INTERFACE CIRCUIT ADVANCE DATA OPERATING DC SUPPLY VOLTAGE RANGE 5V TO 25V SUPPLY OVERVOLTAGE PULSE UP TO 40V VERY LOW STAND-BY QUIESCENT CURRENT, MAX 50µA INTERNAL CLAMPING DIODES AT CONTACT INPUTS TO Vs AND gnd WITH PULSE CURRENT CAPABILITY UP TO +50mA, -75mA CHIP ENABLE FUNCTION AND TRISTATE OUTPUTS FOR PARALLEL BUS CONNECTION NOMINAL CONTACT CURRENTS OF 10mA DEFINED WITH EXTERNAL CONTACT SERIES RESISTORS RIN1-8 CONTACT STATUS MONITORING BY MEANS OF COMPARING THE RESISTANCE AT CONTACT SENSE INPUTS WITH THE INTERNAL REFERENCE RESISTOR VALUE RESISTANCE COMPARING WITH HYSTERESIS FOR HIGH NOISE IMMUNITY AND IMMUNITY TO GROUND AND BATTERY POTENTIAL DIFFERENCES BLOCK DIAGRAM DIP 20 SO20L ORDERING NUMBERS : L9705 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 connected to the battery. The contact sense input supply the contact current and perform the contact resistance comparison function. At the output the contact status is translated into a logical LOW level (contact closed) or logical HIGh level (contact open). January 1992 1/8 This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice. L9705 ABSOLUTE MAXIMUM RATINGS Symbol VSDC VSP VCC IINDC IINP IOUT VEN Ptot Tj DC Supply Voltage Peak Transient Supply Voltage (t < 400ms) Logic Supply Voltage Input DC Current Input Pulse (tp = 0 to 2ms; f< 0.2Hz; n = 25000) Output Current (VO = 0 to 5.5V) Enable Input Voltage Total Power Dissipation (Tamb = 80°C) Junction Temperature Range DIP 20 SO 20 Parameter Value +26 +40 7 +40 -75 to 50 internally limited VCC +0.3V;-0.3V 875 420 max150 V mW mW °C Unit V V V mA mA PIN CONNECTION (top view) THERMAL DATA Symbol R th j-amb R th j-amb Description Thermal Resistance Junction-ambient Thermal Resistance Junction-ambient DIP20 80 165 SO20L Unit °C/W °C/W 2/8 L9705 ELECTRICAL CHARACTERISTICS (VS = 5 to 25V, VCC = 4.75 to 5.25V, Vbat -0.5V < VS ,< Vbat -1V , Tj = –40 to 150°C unless otherwise specified.) Symbol VENL VENH VENh IEN VOUTH IOUT VOUTL IOUT IOUT TS VIN 1,4 VIN 5,8 VIN RIL 1,4 RIL 5,8 R IH 1,4 R IH 5,8 RIL R IH IQC IQS IQS ΣIIN (2) IQC IQS tdo tdTS tdIO NOTES: 1) The input resistor threshold value is a resistor value from the IN-pin to ground at which the corresponding output changes its status (fig.4) 2) Σ IIN 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 Parameter Enable Input Voltage LOW (device activated) Enable Input Voltage HIGH Enable Input Threshold Hysteresis Enable Input Current Output Voltage HIGH Output Current Output Voltage LOW Output Current Output Tristate Current Input Voltage (device active) Input Voltage (device active) Input VoltageDuring Clamp (device disabled) Input Resistor LOW Threshold (note 1) Input Resistor LOW Threshold (note 1) Input Resistor HIGH Threshold (note 1) Input Resistor HIGH Threshold (note 1) Input Resistor Threshold Ratio (note 1) Input Resistor Threshold Ratio (note 1) Quiescent Current Quiescent Current Quiescent Current Quiescent Current Quiescent Current Quiescent Current Delay Time/Output (EN LOW to Output Data Ready) (note 3) Delay Time/Tristate (EN HIGH to Output Tristate) (note 3) Delay Time Input-Output (note 3) Test Condition Min. -0.3 2.4 200 Typ. Max. 0.8 VCC Unit V V mV µA µA V mA V mA µA V V V V KΩ KΩ 420 800 5 2.4V < VEN < VCC 0V < VEN < 0.8V 0 < IOUT < 100µA OUT status = HIGH; VOUT = 0 IOUT = -1mA OUT status = LOW; VOUT = 5.5V 0 < VOUT < VCC EN = LOW; R IN = 1KΩ EN = LOW; R IN = 1KΩ EN = HIGH; IIN = 30mA IIN = -30mA 5V < VS