Document
19-0389; Rev. 2; 9/96
Fault-Protected Analog Multiplexers
_______________General Description
The MAX354/MAX355 fault-protected multiplexers (muxes) use a series N-channel, P-channel, N-channel structure that protects the devices from overvoltage up to 40V beyond the supply rails during power-up, powerdown, and fault conditions. The MAX354/MAX355 also protect sensitive circuit components against voltages near or beyond the normal supplies. The MAX354 single 8-channel mux and the MAX355 dual 4-channel mux protect analog signals while operating from a single 4.5V to 36V supply or ±4.5V to ±18V dual supplies. These muxes have 350Ω on-resistance and can be used for demultiplexing as well as multiplexing. Input leakage current is less than 0.5nA at +25°C and less than 5nA at +85°C. All digital inputs have 0.8V and 2.4V logic thresholds, ensuring both TTL and CMOS logic compatibility without pull-up resistors. Break-before-make operation is guaranteed and power consumption is less than 1.5mW.
____________________________Features
o 350Ω Max On-Resistance o Improved 2nd Source for MAX358/MAX359 and DG458/DG459 o Pin Compatible with ADG508F/ADG509F o All Switches Off with Supplies Off o On Switch Turns Off with Overvoltage o Output Clamps at 1.5V Below Supply Rails o 0.5nA Max Input Leakage at +25°C (5nA at +85°C) o No Power-Up Sequencing Required o TTL and CMOS-Logic Compatibility
MAX354/MAX355
______________Ordering Information
PART MAX354CPE MAX354CWE MAX354C/D MAX354EPE MAX354EWE MAX354MJE MAX355CPE MAX355CWE MAX355C/D MAX355EPE MAX355EWE MAX355MJE TEMP. RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -55°C to +125°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -55°C to +125°C PIN-PACKAGE 16 Plastic DIP 16 Wide SO Dice* 16 Plastic DIP 16 Wide SO 16 CERDIP** 16 Plastic DIP 16 Wide SO Dice* 16 Plastic DIP 16 Wide SO 16 CERDIP**
________________________Applications
Data-Acquisition Systems Industrial and Process Control Avionics ATE Equipment Signal Routing Redundant/Backup Systems
* Dice are tested at TA = +25°C only. ** Contact factory for availability.
__________________________________________________________Pin Configurations
TOP VIEW
MAX354
A0 1 EN 2 V- 3 NO1 4 NO2 5 NO3 6 NO4 7 COM 8 LOGIC 16 A1 15 A2 14 GND 13 V+ 12 NO5 11 NO6 10 NO7 9 NO8 A0 1 EN 2 V- 3 NO1A 4 NO2A 5 NO3A 6 NO4A 7 COMA 8
MAX355
16 A1 15 GND LOGIC 14 V+ 13 NO1B 12 NO2B 11 NO3B 10 NO4B 9 COMB
DIP/SO
DIP/SO 1
________________________________________________________________ Maxim Integrated Products
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Fault-Protected Analog Multiplexers MAX354/MAX355
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND, unless otherwise noted.) V+ ...........................................................................-0.3V to +44V V- ............................................................................+0.3V to -44V V+ to V-...................................................................-0.3V to +44V Digital Inputs.........................................(V+ + 0.3V) to (V- - 0.3V) Input Overvoltage with Mux Power On V+ = +15V ....................................................................... +25V V- = -15V ............................................................................-25V Input Overvoltage with Mux Power Off V+ = 0V.............................................................................+40V V- = 0V ...............................................................................-40V Continuous Current into Any Terminal .............................±30mA Peak Current into Any Terminal ........................................±50mA Continuous Power Dissipation (TA = +70°C) Plastic DIP (derate 10.53mW/°C above +70°C) ...........842mW Wide SO (derate 9.52mW/°C above +70°C)................ 762mW CERDIP (derate 10.00mW/°C above +70°C) ...............800mW Operating Temperature Ranges MAX35_C_ _ ........................................................0°C to +70°C MAX35_E_ _......................................................-40°C to +85°C MAX35_M_ _ ...................................................-55°C to +125°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10sec) ............................ +300°C
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, GND = 0V, VAH = VENH = 2.4V, VAL = VENL = 0.8V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER SWITCH Analog Signal Range Fault-Free Analog Signal Range On-Resistance (Note 2) On-Resis.