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Maxim > Products > [Analog Switches and Multiplexers]  [Protection and Isolation]  [Military/Aerospace] 
MAX378, MAX379
8-Channel, High-Voltage, Fault-Protected Multiplexers


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 120kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The MAX378 8-channel single-ended (1-of-8) multiplexer and the MAX379 4-channel differential (2-of-8) multiplexer use a series N-channel/P-channel/N-channel structure to provide significant fault protection. If the power supplies to the MAX378/MAX379 are inadvertently turned off while input voltages are still applied, all channels in the muxes are turned off, and only a few nanoamperes of leakage current will flow into the inputs. This protects not only the MAX378/MAX379 and the circuitry they drive, but also the sensors or signal sources that drive the muxes.

The series N-channel/P-channel/N-channel protection structure has two significant advantages over the simple current-limiting protection scheme of the industry's first-generation fault-protected muxes. First, the Maxim protection scheme limits fault currents to nanoamp leakage values rather than many milliamperes. This prevents damage to sensors or other sensitive signal sources. Second, the MAX378/MAX379 fault-protected muxes can withstand a continuous±60V input, unlike the first generation, which had a continuous ±35V input limitation imposed by power dissipation considerations.

All digital inputs have logic thresholds of 0.8V and 2.4V, ensuring both TTL and CMOS compatibility without requiring pull-up resistors. Break-before-make operation is guaranteed. Power dissipation is less than 2mW.

Key Features   Applications/Uses
  • Fault Input Voltage ±75V with Power Supplies Off
  • Fault Input Voltage ±60V with ±15V Power Supplies
  • All Switches Off with Power Supplies Off
  • On Channel Turns OFF if Overvoltage Occurs on Input or Output
  • Only Nanoamperes of Input Current Under All Fault Conditions
  • No Increase in Supply Currents Due to Fault Conditions
  • Latchup-Proof Construction
  • Operates from ±4.5V to ±18V Supplies
  • All Digital Inputs are TTL and CMOS Compatible
  • Low-Power Monolithic CMOS Design

 
  		• Avionics Test Equipment
  		• Data Acquisition
  		• Industrial and Process Control Systems
  		• Signal Routing Between Systems

    Key Specifications:  Switches and Multiplexers (Mid Voltage)
    Part Number Functions Config. Channels VSUPPLY (Dual)
    (±V)    		 VSUPPLY (Dual)
    (±V)    		 RON
    (Ω)    		 IL(OFF)
    (nA)    		 tON
    (ns)    		 tOFF
    (ns)    		 CON
    (pF)    		 COFF
    (pF)    		 Price
    min max max max min max max max See Notes
    MAX378  Mux 8:1 1 4.5 18 3500 2 1000 500 25 5 $3.50 @1k
    MAX379  4:1 2 12 $3.50 @1k
    See All Switches and Multiplexers (Mid Voltage) (297)

    Diagram
    MAX378, MAX379: Pin Configuration
    Pin Configuration

    Application Notes
  		• Application Note 1132: Fault Protection Saves Multiplexers, Switches, and Downstream Circuitry - MAX379

    Design Guides
  		• Signal Routing & Protection (PDF)
  		• Thermal Management (PDF)

    Reliability Reports
  		• Show FIT data for:
  		• Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-39 of 39

    MAX378 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX378CJE    
    		Active CDIP(N);16 pin;173.5 mm²
    Outline Drawing: 21-0045 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: J16-3*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX378EJE    
    		Active CDIP(N);16 pin;173.5 mm²
    Outline Drawing: 21-0045 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: J16-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX378MJE    
    		Active CDIP(N);16 pin;173.5 mm²
    Outline Drawing: 21-0045 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: J16-3*
    		-55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX378MJE/883B    
    		Active CDIP(N);16 pin;173.5 mm²
    Outline Drawing: 21-0045 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: J16-3*
    		-55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX378C/D    
    		Active DICE SALES;NA pin;0 mm²

    Land Pattern: Not Applicable
    Use pkgcode/variation: DICE*
    		See data sheet
    MAX378MLP/883B    
    		Active LCC;20 pin;82.6 mm²
    Outline Drawing: 21-0658 (PDF)
    Land Pattern: 90-0177 (PDF)
    Use pkgcode/variation: L20-3*
    		-55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX378MLP    
    		Active LCC;20 pin;82.6 mm²
    Outline Drawing: 21-0658 (PDF)
    Land Pattern: 90-0177 (PDF)
    Use pkgcode/variation: L20-3*
    		RoHS/Lead-Free: No
    Materials Analysis
    MAX378CPE+  
    		Active PDIP(N);16 pin;160.5 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+8*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX378EPE+  
    		Active PDIP(N);16 pin;160.5 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+8*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX378CPE  
    		Active PDIP(N);16 pin;160.5 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-8*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX378EPE  
    		Active PDIP(N);16 pin;160.5 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-8*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX378CWG+  
    		Active SOIC(W);24 pin;164.3 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24+3*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX378CWG+T    
    		Active

    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX378EWG+  
    		Active SOIC(W);24 pin;164.3 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX378EWG+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX378CWG  
    		Active SOIC(W);24 pin;164.3 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24-3*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX378CWG-T    
    		Active

    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX378EWG  
    		Active SOIC(W);24 pin;164.3 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX378EWG-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX379 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX379C/D    
    		Active

    Land Pattern: Not Available

    		See data sheet
    MAX379CJE    
    		Active CDIP(N);16 pin;173.5 mm²
    Outline Drawing: 21-0045 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: J16-3*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX379EJE    
    		Active CDIP(N);16 pin;173.5 mm²
    Outline Drawing: 21-0045 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: J16-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX379MJE    
    		Active CDIP(N);16 pin;173.5 mm²
    Outline Drawing: 21-0045 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: J16-3*
    		-55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX379MJE/883B    
    		Active CDIP(N);16 pin;173.5 mm²
    Outline Drawing: 21-0045 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: J16-3*
    		-55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX379MJE/HR    
    		Active CDIP(N);16 pin;173.5 mm²
    Outline Drawing: 21-0045 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: J16-3*
    		-55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX379MLP    
    		Active LCC;20 pin;82.6 mm²
    Outline Drawing: 21-0658 (PDF)
    Land Pattern: 90-0177 (PDF)
    Use pkgcode/variation: L20-3*
    		-55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX379MLP/883B    
    		Active LCC;20 pin;82.6 mm²
    Outline Drawing: 21-0658 (PDF)
    Land Pattern: 90-0177 (PDF)
    Use pkgcode/variation: L20-3*
    		-55°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX379EPE+  
    		Active PDIP(N);16 pin;160.5 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+8*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX379CPE+  
    		Active PDIP(N);16 pin;160.5 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16+8*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX379CPE    
    		Active PDIP(N);16 pin;160.5 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-8*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX379EPE  
    		Active PDIP(N);16 pin;160.5 mm²
    Outline Drawing: 21-0043 (PDF)
    Land Pattern: Not Applicable
    Use pkgcode/variation: P16-8*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX379EWG+  
    		Active SOIC(W);24 pin;164.3 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24+3*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX379EWG+T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet
    MAX379CWG    
    		Active SOIC(W);24 pin;164.3 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24-3*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX379CWG-T    
    		Active

    Land Pattern: Not Available

    		0°C to +70°C See data sheet
    MAX379CWG+  
    		Active SOIC(W);24 pin;164.3 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24+3*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX379CWG+T    
    		Active SOIC(W);24 pin;164.3 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24+3*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX379EWG  
    		Active SOIC(W);24 pin;164.3 mm²
    Outline Drawing: 21-0042 (PDF)
    Land Pattern: 90-0182 (PDF)
    Use pkgcode/variation: W24-3*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX379EWG-T    
    		Active

    Land Pattern: Not Available

    		-40°C to +85°C See data sheet

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    Document Ref.: 19-1902; Rev 1; 1994-08-01
    This page last modified: 2009-11-10


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