MAX4631:Fault-Protected, High-Voltage, Dual Analog Switches

The MAX4631/MAX4632/MAX4633 high-voltage, dual analog switches are pin compatible with the industry-standard DG401/DG403/DG405. They upgrade the existing devices with fault-protected inputs and rail-to-rail signal handling capabilities. The MAX4631/MAX4632/MAX4633's normally open (NO) and normally closed (NC) terminals are protected from overvoltage faults up to 36V during power-up or power-down. During a fault condition, these terminals become open circuit and only nanoamperes of leakage current flow from the source, yet the switch output (COM_) continues to furnish up to 18mA of the appropriate polarity supply voltage to the load. This ensures unambiguous rail-to-rail outputs when a fault begins and ends. On-resistance is 85Ω (max) at +25°C and is matched between switches to 6Ω (max). Off-leakage current is only 0.5nA at +25°C and 5nA at +85°C. The MAX4631 has two NO single-pole/single-throw (SPST) switches. The MAX4632 has two NO/NC single-pole/double-throw (SPDT) switches. The MAX4633 has two NO double-pole/single-throw (DPST) switches. These CMOS switches operate with dual power supplies ranging from ±4.5V to ±18V or a single supply between +9V and +36V. All digital inputs have +0.8V and +2.4V logic thresholds, ensuring both TTL- and CMOS-logic compatibility when using ±15V or a single +12V supply.

Key Features
  • Fault Protection
    • ±40V with Power Off
    • ±36V with ±15V Supplies (MAX4631/MAX4633)
    • ±25V with ±15V Supplies (MAX4632)
  • Rail-to-Rail Signal Handling
  • No Power-Supply Sequencing Required
  • All Switches Off with Power Off
  • Output Clamped to Appropriate Supply Voltage During Fault Condition; No Transition Glitch
  • 85Ω (max) Signal Paths with ±15V Supplies
  • ±4.5V to ±18V Dual Supplies
  • +9V to +36V Single Supply
  • Low Power Consumption: <6mW
  • Pin Compatible with Industry-Standard DG401/DG403/DG405
  • TTL- and CMOS-Logic Compatible Inputs with Single +9V to +15V, or ±15V Supplies
MAX4631, MAX4632, MAX4633: Pin Configuration
MAX4631, MAX4632, MAX4633: Pin Configuration
Applications/Uses
  • Automated Test Equipment (ATE)
  • Avionics
  • Data Acquisition
  • Industrial and Process Control Systems
  • Redundant/Backup Systems
DataSheet
titleDownload file
MAX4631-MAX4633 Data SheetMAX4631-MAX4633.pdf
Parametrics
Part NumberFunctionsConfig.ChannelsNormal PositionVSUPPLY (Single)
(V)
VSUPPLY (Single)
(V)
VSUPPLY (Dual)
(±V)
VSUPPLY (Dual)
(±V)
RON
(Ω)
IL(OFF)
(nA)
tON
(ns)
tOFF
(ns)
QINJECTION
(pC)
CON
(pF)
COFF
(pF)
Package/PinsBudgetary
Price
minmaxminmaxmaxmaxminmaxSee Notes
MAX4631SwitchSPST2Open9364.518850.5500400102218PDIP(N)/16
SOIC(N)/16
$3.61 @1k
MAX4632SPDT-PDIP(N)/16
SOIC(N)/16
$4.27 @1k
MAX4633DPSTOpenPDIP(N)/16
SOIC(N)/16
$4.60 @1k
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX4631CPENo Longer AvailablePDIP(N),;16 pin;158.4 mm²0°C to +70°CNo
MAX4631CSENo Longer AvailableMAX4631CSE+SOIC(N),;16 pin;62 mm²0°C to +70°CNo
MAX4631CSE+ActiveSOIC(N),;16 pin;62 mm²0°C to +70°CLead Free
MAX4631CSE+TActiveSOIC(N),;16 pin;62 mm²0°C to +70°CLead Free
MAX4631CSE-TNo Longer AvailableMAX4631CSE+TN.SO;16 pin0°C to +70°CSee data sheet
MAX4631EPENo Longer AvailableMAX4631EPE+PDIP(N),;16 pin;158.4 mm²-40°C to +85°CNo
MAX4631EPE+ActivePDIP(N),;16 pin;158.4 mm²-40°C to +85°CLead Free
MAX4631ESENo Longer AvailableMAX4631ESE+SOIC(N),;16 pin;62 mm²-40°C to +85°CNo
MAX4631ESE+ActiveSOIC(N),;16 pin;62 mm²-40°C to +85°CLead Free
MAX4631ESE+TActiveSOIC(N),;16 pin;62 mm²-40°C to +85°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX4631ESE-TNo Longer AvailableMAX4631ESE+TSOIC(N),;16 pin;62 mm²-40°C to +85°CNo
MAX4631-MAX4633.pdf MAX4632
MAX4631-MAX4633.pdf MAX4633