L9705D

L9705 DOUBLE QUAD CONTACT INTERFACE CIRCUIT ■ ■ ■ ■ ■ ■ ■ ■ 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 ) s ( ct BLOCK DIAGRAM DIP20 SO20 ORDERING NUMBERS: L9705 L9705D c u d DESCRIPTION ) s t( 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. e t le o r P o s b O - At the output the contact status is translated into a logical LOW level (contact closed) or logical HIGH level (contact open). u d o r P e t e l o s b O November 2003 1/8 L9705 ABSOLUTE MAXIMUM RATINGS Symbol VSDC Value Unit DC Supply Voltage Parameter +26 V +40 V 7 V ±40 mA -75 to 50 mA VSP Peak Transient Supply Voltage (t ≤ 400ms) VCC Logic Supply Voltage IINDC Input DC Current IINP Input Pulse (tp = 0 to 2ms; f≤ 0.2Hz; n = 25000) IOUT Output Current (VO = 0 to 5.5V) internally limited VEN Enable Input Voltage VCC +0.3V;-0.3V V Ptot Total Power Dissipation (Tamb = 80°C) 875 420 mW mW max 150 °C DIP 20 SO 20 Junction Temperature Range Tj PIN CONNECTION (Top view) c u d e t le ) s ( ct Symbol t e l o Rth j-amb s b O 2/8 o r P o s b O - u d o r P e THERMAL DATA ) s t( Parameter Thermal Resistance Junction to ambient DIP20 SO20 Unit 80 165 °C/W L9705 ELECTRICAL CHARACTERISTCS (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 Parameter Enable Input Voltage LOW (device activated) Enable Input Voltage HIGH Test Condition IEN VOUTH IOUT VOUTL Typ. 2.4 Enable Input Threshold Hysteresis Enable Input Current VENh Min. -0.3 Output Voltage HIGH V 800 mV 5 µA µA VCC V 0.5 2 mA 0.2 0.4 V -5 -20 mA 0.5 µA 420 2.4V < VEN < VCC 0V < VEN < 0.8V -5 -1 0 < IOUT < 100µA 4 VCC 0.1 OUT status = HIGH; VOUT = 0 Output Voltage LOW IOUT = -1mA 0.05 Unit V VCC 200 Output Current Max. 0.8 Output Current OUT status = LOW; VOUT = 5.5V IOUT TS Output Tristate Current 0 < VOUT < VCC VIN 1,4 Input Voltage (device active) EN = LOW; RIN = 1KΩ VS - 2 VS 1.5 VS 0.4 V VIN 5,8 Input Voltage (device active) EN = LOW; RIN = 1KΩ 0.4 1.5 2 V VIN Input VoltageDuring Clamp (device disabled) EN = HIGH; RIL 1,4 Input Resistor LOW Threshold (note 1) RIL 5,8 IOUT o r P VS +0.3 -2 VS +1 -1 5V < VS