MAX4645:Fast, Low-Voltage, 2.5 Ohm, SPST, CMOS Analog Switches

The MAX4645/MAX4646 single-pole, single-throw (SPST) analog switches feature a 2.5Ω typical on-resistance (RON) from a +5V supply. RON is flat (0.4Ω max) over the specified signal range. Each switch can handle rail-to-rail analog signals. Off-leakage current is 0.25nA max at +25°C. These analog switches are ideal in low-distortion applications and are the preferred solution over mechanical relays in automated test equipment or applications where current switching is required. They have low power requirements, require less board space, and are more reliable than mechanical relays. These switches operate from a +1.8V to +5V single supply, making them ideal for use in battery-powered applications. The MAX4645/MAX4646 have fast switching speeds of 12ns turn-on time (tON) and 8ns turn-off time (tOFF). The MAX4645 is a normally open (NO) switch, and the MAX4646 is a normally closed (NC) switch. Both are available in 5-pin SOT23, 6-pin SOT23, and 8-pin µMAX® packages.

Key Features
  • +1.8V to +5V Single-Supply Operation
  • Guaranteed RON
    • 2.5Ω max (5V supply)
    • 3.5Ω max (3V supply)
  • 1.8V Operation
    • RON 30Ω typ Over Temperature
    • tON 40ns typ, tOFF 20ns typ
  • Low RON Flatness: 0.4Ω max
  • Guaranteed Low Leakage Currents
    • ±0.25nA at +25°C
  • Rail-to-Rail Output Capability
  • TTL/CMOS-Logic Compatible
  • -75dB Off-Isolation at 1MHz
  • Low Distortion: 0.014% typ
MAX4645, MAX4646: Pin Configuration
MAX4645, MAX4646: Pin Configuration
Applications/Uses
  • Audio/Video Signal Routing
  • Battery-Powered Systems
  • Communications Circuits
  • Low-Voltage Data-Acquisition Systems
  • Relay Replacement
  • Sample-and-Hold Circuits
DataSheet
titleDownload file
MAX4645-MAX4646 Data SheetMAX4645-MAX4646.pdf
Parametrics
Part NumberConfig.ChannelsNormal PositionVSUPPLY (Single)
(V)
VSUPPLY (Single)
(V)
VSIGNAL
(V)
VSIGNAL
(V)
Dynamic Range (max)
(V)
RON
(Ω)
RFLAT(ON)
(Ω)
RFLAT(ON)
(Ω)
IL(OFF)
(nA)
tON
(ns)
tOFF
(ns)
QINJECTION
(pC)
CON
(pF)
COFF
(pF)
Package/PinsBudgetary
Price
minmaxminmaxmaxmaxtypmaxmaxminmaxSee Notes
MAX4645SPST1Open1.85.505.55.52.50.10.40.25151053817µMAX/8
SOT/5
SOT/6
$1.14 @1k
MAX4646ClosedµMAX/8
SOT/5
SOT/6
$0.88 @1k
Quality and Environmental Data
Related Products
  • MAX4568:±15kV ESD-Protected, Low-Voltage, SPDT/SPST, CMOS Analog Switches
  • MAX4594:Low-Voltage, Single-Supply, 10Ω SPST CMOS Analog Switches
  • MAX4626:0.5Ω, Low-Voltage, Single-Supply SPST Analog Switches
  • MAX4514:Low-Voltage, Low-On-Resistance, SPST, CMOS Analog Switches
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX4645EUANo Longer AvailableMAX4645EUA+µMAX,;8 pin;15.6 mm²-40°C to +85°CNo
MAX4645EUA+ActiveµMAX,;8 pin;15.6 mm²-40°C to +85°CLead Free
MAX4645EUA+TActiveuMAX;-40°C to +85°CSee data sheet
MAX4645EUA-TNo Longer AvailableMAX4645EUA+TµMAX,;8 pin;15.6 mm²-40°C to +85°CNo
MAX4645EUK+ActiveSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX4645EUK+TActiveSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX4645EUK-TNo Longer AvailableMAX4645EUK+TSOT,;5 pin;9 mm²-40°C to +85°CNo
MAX4645EUTNo Longer AvailableMAX4645EUT+SOT,;6 pin;9 mm²-40°C to +85°CNo
MAX4645EUT+ActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
MAX4645EUT+TActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX4645EUT-TNo Longer AvailableMAX4645EUT+TSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX4645-MAX4646.pdf MAX4646
MAX4645.pdf MAX4645
MAX4645-MAX4646.pdf MAX4646