MAX366/MAX367 19-0326 Rev 0 12/94 Signal-Line Circuit Protectors General Description Features The MAX366 and MAX367 are multiple, two-terminal circuit 40V Overvoltage Protection protectors. Placed in series with signal lines, each two-ter- Open Signal Paths with Power Off minal device guards sensitive circuit components against 100 Signal Paths with Power On voltages near and beyond the normal supply voltages. These devices are used at interfaces where sensitive cir- 1nA Max Path Leakage at +25C cuits are connected to the external world and could 44V Maximum Supply Voltage Rating encounter damaging voltages (up to 35V beyond the sup- ply rails) during power-up, power-down, or fault conditions. Automatic Protection No Programming or The MAX366 contains three independent protectors and Controls the MAX367 contains eight. They can protect analog sig- nals using either unipolar (4.5V to 36V) or bipolar (2.25V Ordering Information to 18V) power supplies. Each protector is symmetrical. Input and output terminals may be freely interchanged. PART TEMP. RANGE PIN-PACKAGE MAX366CPA 0C to +70C 8 Plastic DIP These devices are voltage-sensitive MOSFET transistor arrays that are normally on when power is applied and MAX366CSA 0C to +70C 8 SO normally open circuit when power is off. With 10V sup- MAX366C/D 0C to +70C Dice* plies, on-resistance is 100 max and leakage is less than MAX366EPA -40C to +85C 8 Plastic DIP 1nA at +25C. MAX366ESA -40C to +85C 8 SO When signal voltages exceed or are within approximately MAX366MJA -55C to +125C 8 CERDIP** 1.5V of either power-supply voltage (including when MAX367CPN 0C to +70C 18 Plastic DIP power is off), the two-terminal resistance increases dra- MAX367CWN 0C to +70C 18 Wide SO matically, limiting fault current as well as output voltage to sensitive circuits. The protected side of the switch main- MAX367C/D 0C to +70C Dice* tains the correct polarity and clamps approximately 1.5V MAX367EPN -40C to +85C 18 Plastic DIP below the supply rail. There are no glitches or polarity MAX367EWN -40C to +85C 18 Wide SO reversals going into or coming out of a fault condition. MAX367MJN -55C to +125C 18 CERDIP** Applications MAX367 available after January 1, 1995. * Dice are tested at T = +25C only. Process Control Systems Redundant/Backup Systems A * Contact factory for availability. Hot-Insertion Boards/Systems ATE Equipment Data-Acquisition Systems Sensitive Instruments Pin Configurations appear at end of data sheet. Typical Operating Circuit ELECTRONICS PROTECTOR FAULT REMOTE SENSOR 8 +28V MAX366 +12V +10V REG. V+ 1 IN1 OUT1 7 (SHORT) SENSITIVE 2 IN2 OUT2 6 AMPLIFIER 3 IN3 OUT3 5 4 V- (OPEN) FAULT Maxim Integrated Products 1 Call toll free 1-800-998-8800 for free samples or literature.Signal-Line Circuit Protectors ABSOLUTE MAXIMUM RATINGS V+ to V-......................................................................-0.3V, +44V 18-Pin Plastic DIP (derate 11.11mW/C above +70C) ...889mW IN , OUT ..................................................(V- + 44V), (V+ - 44V) 18-Pin Wide SO (derate 9.52mW/C above +70C) .....762mW Continuous Current into Any Terminal..............................30mA 18-Pin CERDIP (derate 10.53mW/C above +70C).....842mW Peak Current into Any Terminal Operating Temperature Ranges (pulsed at 1ms, 10% duty cycle)...................................70mA MAX36 C ........................................................0C to +70C Continuous Power Dissipation (T = +70C) MAX36 E ......................................................-40C to +85C A 8-Pin Plastic DIP (derate 9.09mW/C above +70C) ....727mW MAX36 M ...................................................-55C to +125C 8-Pin SO (derate 5.88mW/C above +70C).................471mW Storage Temperature Range .............................-65C to +150C 8-Pin CERDIP (derate 8.00mW/C above +70C).........640mW Lead Temperature (soldering, 10sec) .............................+300C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V+ = +15V, V- = -15V, T = T to T , unless otherwise noted.) A MIN MAX TEMP. PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS RANGE Analog Signal Range V , V (Note 1) All (V+ - 40) (V- + 40) V IN OUT Fault-Free Analog Signal Range V , V V+ = 15V, V- = -15V (Note 2) All -11 11 V IN OUT Analog-Signal Output V = V+ or V-, IN V All (V- + 3) (V+ - 1.5) V OUT Range (Fault) 100k < R < 1000M (Note 1) OUT +25C 62 85 V+ = 15V, V- = -15V, V = 10V, IN C, E 100 IOUT = 1mA M 125 +25C 62 100 Analog-Signal-Path Resistance R (IN-OUT) V+ = 10V, V- = -10V, VIN = 5V, C, E 125 I = 1mA OUT M 150 +25C 140 350 V+ = 5V, V- = -5V, VIN = 2V, I = 1mA OUT C, E, M 400 +25C 7 Signal-Path Resistance Match R V = 10V, I = 1mA (IN-OUT) IN OUT C, E, M 10 +25C -10 10 Signal-Path Leakage V+ = V- = 0V, V = 35V, IN I nA IN(OFF) (Power Off) V = open circuit OUT C, E, M -1000 1000 +25C -1 1 Signal-Path Leakage I V = V = 10V nA OUT(ON) IN OUT (without Fault Condition) C, E, M -100 100 +25C -10 10 Signal-Path Leakage I V = 25V, V = open circuit nA IN(ON) IN OUT (with Fault Condition) C, E, M -1000 1000 +25C -10 10 Signal-Path Leakage V+ = V- = 0V, V = 0V, OUT I nA IN(OFF) (with Overvoltage) VIN = 35V C, E, M -1000 1000 POWER SUPPLY +25C, Power-Supply Range V+, V- 0 18 V C, E, M Power-Supply Range +25C, V+, V- R < 1000 (Note 2) 2.25 18 V (IN-OUT) (without Fault Condition) C, E, M +25C -1 1 Power-Supply Current I+, I- A C, E, M -10 10 Note 1: Guaranteed, but not tested. Note 2: See Typical Operating Characteristics curves for fault-free analog signal range at various supply voltages. 2 MAX366/MAX367