MAX395 19-0448 Rev 0 11/95 Serially Controlled, Low-Voltage, 8-Channel SPST Switch General Description Features The MAX395 8-channel, serially controlled, single-pole/sin- SPI/QSPI, Microwire-Compatible Serial gle-throw (SPST) analog switch offers eight separately Interface controlled switches. The switches conduct equally well in 8 Separately Controlled SPST Switches either direction. On-resistance (100 max) is matched between switches to 5 max and is flat (10 max) over 100 Signal Paths with 5V Supplies the specified signal range. Rail-to-Rail Signal Handling These CMOS devices can operate continuously with dual power supplies ranging from 2.7V to 8V or a Asynchronous RESET Input single supply between +2.7V and +16V. Each switch Pin Compatible with Industry-Standard MAX335 can handle rail-to-rail analog signals. The off leakage current is only 0.1nA at +25C or 5nA at +85C. 2.7V to 8V Dual Supplies +2.7V to +16V Single Supply Upon power-up, all switches are off, and the internal shift registers are reset to zero. The MAX395 is electrically >2kV ESD Protection per Method 3015.7 equivalent to two MAX391 quad switches controlled by a TTL/CMOS-Compatible Inputs (with +5V or serial interface, and is pin compatible with the MAX335. 5V Supplies) The serial interface is compatible with SPI/QSPI and Microwire. Functioning as a shift register, it allows data Ordering Information (at DIN) to be clocked in synchronously with the rising edge of clock (SCLK). The shift registers output (DOUT) PART TEMP. RANGE PIN-PACKAGE enables several MAX395s to be daisy chained. MAX395CNG 0C to +70C 24 Narrow Plastic DIP All digital inputs have 0.8V to 2.4V logic thresholds, ensur- MAX395CWG 0C to +70C 24 Wide SO ing both TTL- and CMOS-logic compatibility when using MAX395C/D 0C to +70C Dice* 5V supplies or a single +5V supply. MAX395ENG -40C to +85C 24 Narrow Plastic DIP Applications MAX395EWG -40C to +85C 24 Wide SO Serial Data-Acquisition Industrial and Process- MAX395MRG -55C to +125C 24 Narrow CERDIP** Systems Control Systems * Contact factory for dice specifications. Avionics ATE Equipment ** Contact factory for availability. Audio Signal Routing Networking Functional Diagram Pin Configuration NO0 NO7 TOP VIEW SCLK 1 24 CS MAX395 V+ 2 23 RESET COM0 COM7 DIN 3 22 DOUT LOGIC GND 4 21 V- PARALLEL REGISTER AND TRANSLATOR NO0 5 20 NO7 COM0 6 19 COM7 DOUT DIN 8-BIT SHIFT REGISTER NO1 7 18 NO6 COM1 8 17 COM6 RESET NO2 9 16 NO5 MAX395 COM2 10 15 COM5 SCLK CLOCK TRANSLATOR NO3 11 14 NO4 LATCH COM3 12 13 COM4 CS CS TRANSLATOR DIP/SO SPI and QSPI are trademarks of Motorola, Inc. Microwire is a trademark of National Semiconductor Corp. Maxim Integrated Products 1 Call toll free 1-800-998-8800 for free samples or literature.Serially Controlled, Low-Voltage, 8-Channel SPST Switch ABSOLUTE MAXIMUM RATINGS Voltages Referenced to GND Continuous Power Dissipation (T = +70C) A V+...........................................................................-0.3V, +17V Narrow Plastic DIP (derate 13.33mW/C above +70C)...1067mW V- ............................................................................-17V, +0.3V Wide SO (derate 11.76mW/C above +70C)...............941mW V+ to V-...................................................................-0.3V, +17V Narrow CERDIP (derate 12.50mW/C above +70C)....1000mW SCLK, CS, DIN, DOUT, RESET .................-0.3V to (V+ + 0.3V) Operating Temperature Ranges NO, COM .................................................(V- - 2V) to (V+ + 2V) MAX395C G .......................................................0C to +70C Continuous Current into Any Terminal..............................30mA MAX395E G ....................................................-40C to +85C Peak Current, NO or COM MAX395MRG ..................................................-55C to +125C (pulsed at 1ms,10% duty cycle)..................................100mA Storage Temperature Range .............................-65C to +150C 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 CHARACTERISTICSDual Supplies (V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, T = T to T , unless otherwise noted. Typical values are at T = +25C.) A MIN MAX A MIN TYP MAX PARAMETER SYMBOL CONDITIONS UNITS (Note 1) ANALOG SWITCH Analog Signal Range V , V C, E, M V- V+ V COM NO T = +25C 60 100 V+ = 5V, V- = -5V, A COM, NO On-Resistance R ON VCOM = 3V, INO = 1mA C, E, M 125 TA = +25C 5 COM, NO On-Resistance Match V+ = 5V, V- = -5V, R ON Between Channels (Note 2) V = 3V, I = 1mA COM NO C, E, M 10 T = +25C 10 COM, NO On-Resistance V+ = 5V, V- = -5V, I = 1mA, A NO R FLAT(ON) Flatness (Note 2) VCOM = -3V, 0V, 3V C, E, M 15 T = +25C -0.1 0.002 0.1 A V+ = 5.5V, V- = -5.5V, V = -4.5V, V = 4.5V COM NO C, E, M -10 10 NO Off Leakage Current INO(OFF) nA (Note 3) T = +25C -0.1 0.002 0.1 V+ = 5.5V, V- = -5.5V, A V = 4.5V, V = -4.5V COM NO C, E, M -10 10 T = +25C -0.1 0.002 0.1 A V+ = 5.5V, V- = -5.5V, V = -4.5V, V = 4.5V COM NO C, E, M -10 10 COM Off Leakage Current I nA COM(OFF) (Note 3) T = +25C 0.1 0.002 0.1 V+ = 5.5V, V- = -5.5V, A V = 4.5V, V = -4.5V COM NO C, E, M -10 10 T = +25C -0.2 0.01 0.2 COM On Leakage Current V+ = 5.5V, V- = -5.5V, A ICOM(ON) nA (Note 3) V = V = 4.5V COM NO C, E, M -20 20 DIGITAL I/O DIN, SCLK, CS, RESET Input V C, E, M 2.4 V IH Voltage Logic Threshold High DIN, SCLK, CS, RESET Input V C, E, M 0.8 V IL Voltage Logic Threshold Low DIN, SCLK, CS, RESET Input VDIN, VSCLK, I I C, E, M -1 0.03 1 A IH, IL Current Logic High or Low V = 0.8V or 2.4V CS DOUT Output Voltage Logic High V I = 0.8mA C, E, M 2.8 V+ V DOUT DOUT DOUT Output Voltage Logic Low VDOUT IDOUT = -1.6mA C, E, M 0 0.4 V SCLK Input Hysteresis SCLK C, E, M 100 mV HYST 2 MAX395