DG421:Improved Low-Power, CMOS Analog Switches with Latches

Maxim's redesigned DG421/DG423/DG425 monolithic analog switches now feature guaranteed on-resistance matching (3Ω max) between switches and on-resistance flatness over the signal range (4Ω max). These low on-resistance switches (20Ω typ) conduct equally well in both directions. They guarantee a low charge injection of 15pC maximum and an ESD tolerance of 2000V minimum per Method 3015.7. Off leakage current over temperature has also been reduced (less than 5nA at +85°C). The DG421/DG423/DG425 are precision, dual CMOS switches with latchable logic inputs that simplify interfacing with microprocessors (µPs). The single-pole/single-throw DG421 and double-pole/single-throw DG425 are normally open dual switches. The dual, single-pole/double-throw DG423 has two normally open and two normally closed switches. Fast switching times (175ns for tON and 145ns for tOFF) and low power consumption (35µW max) make these parts ideal for battery-powered applications requiring µP-compatible switches. Operation is from a single +10V to +30V supply, or bipolar ±4.5V to ±20V supplies. Fabricated with the same 44V silicon-gate process, these switches have rail-to-rail signal handling capabilities.

Key Features
  • Plug-In Upgrades for Industry-Standard DG421/DG423/DG425
  • Improved R(DS)ON Match Between Channels (3Ω max)
  • Guaranteed RFLAT(ON) Over Signal Range (4Ω max)
  • Improved Charge Injection (15pC max)
  • Improved Off Leakage Current Over Temperature (< 5nA at +85°C)
  • Withstands Electrostatic Discharge (2000V min) per Method 3015.7
  • Low RDS(ON)(35Ω max)
  • Single-Supply Operation +10V to +30V
  • Bipolar-Supply Operation ±4.5V to ±20V
  • Low Power Consumption (35µW max)
  • Rail-to-Rail Signal Handling Capability
  • TTL/CMOS-Logic Compatible
DG421: Pin Configuration
DG421: Pin Configuration
Applications/Uses
  • Audio-Signal Routing
  • Battery-Powered Applications
  • Communication Systems
  • Fax Machines
  • Guidance and Control Systems
  • Military Radios
  • Modems
  • PBX, PABX
  • Sample-and-Hold Circuits
  • Test Equipment
DataSheet
titleDownload file
DG421-DG425 Data SheetDG421-DG425.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
DG421SwitchSPST2Open10304.520350.25250200153912CDIP(N)/16
PDIP(N)/16
PLCC/20
SOIC(N)/16
-
DG423SPDT-CDIP(N)/16
PDIP(N)/16
PLCC/20
SOIC(N)/16
$4.27 @1k
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
DG421AKNo Longer AvailableCDIP(N),;16 pin;173.5 mm²-55°C to +125°CNo
DG421C/DNo Longer AvailableDICE SALES,;NA pin;DICE;0°C to +70°CSee data sheet
DG421CJNo Longer AvailablePDIP(N),;16 pin;158.4 mm²0°C to +70°CNo
DG421CYNo Longer AvailableSOIC(N),;16 pin;61.9 mm²0°C to +70°CNo
DG421CY-TNo Longer AvailableN.SO;16 pin0°C to +70°CSee data sheet
DG421DJNo Longer AvailablePDIP(N),;16 pin;158.4 mm²-40°C to +85°CNo
DG421DKNo Longer AvailableDG421DY+-40°C to +85°CSee data sheet
DG421DNNo Longer AvailablePLCC,;20 pin;100.6 mm²-40°C to +85°CNo
DG421DN-TNo Longer AvailablePLCC;20 pin-40°C to +85°CSee data sheet
DG421DYNo Longer AvailableDG421DY+SOIC(N),;16 pin;61.9 mm²-40°C to +85°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
DG421DY+ActiveSOIC(N),;16 pin;61.9 mm²-40°C to +85°CLead Free
DG421DY+TActiveSOIC(N),;16 pin;61.9 mm²-40°C to +85°CLead Free
DG421DY-TNo Longer AvailableDG421DY+TN.SO;16 pin-40°C to +85°CSee data sheet
DG421-DG425.pdf DG423
DG421-DG425.pdf DG425