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

Product Details

Key Features

Parametric specs for Switches and Multiplexers (Low Voltage)
Configuration SPST
# Channels 1
Normal Position Open
VSUPPLY (Single) (V) (min) 1.8
VSUPPLY (Single) (V) (max) 5.5
VSIGNAL (V) (min) 0
VSIGNAL (V) (max) 5.5
Dynamic Range (max) (V) (max) 5.5
RON (Ω) (max) 2.5
RFLAT(ON) (Ω) (typ) 0.1
Package/Pins SOT23/5
SOT23/6
UMAX/8
Budgetary
Price (See Notes)
1.5
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Simplified Block Diagram

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Parameters

Parametric specs for Switches and Multiplexers (Low Voltage)
Configuration SPST
# Channels 1
Normal Position Open
VSUPPLY (Single) (V) (min) 1.8
VSUPPLY (Single) (V) (max) 5.5
VSIGNAL (V) (min) 0
VSIGNAL (V) (max) 5.5
Dynamic Range (max) (V) (max) 5.5
RON (Ω) (max) 2.5
RFLAT(ON) (Ω) (typ) 0.1
Package/Pins SOT23/5
SOT23/6
UMAX/8
Budgetary
Price (See Notes)
1.5

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

Applications/Uses

  • Audio/Video Signal Routing
  • Battery-Powered Systems
  • Communications Circuits
  • Low-Voltage Data-Acquisition Systems
  • Relay Replacement
  • Sample-and-Hold Circuits

Description

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.

Simplified Block Diagram

MAX4645, MAX4646: Pin Configuration MAX4645, MAX4646: Pin Configuration Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.