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
Applications/Uses
+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
Audio/Video Signal Routing
Battery-Powered Systems
Communications Circuits
Low-Voltage Data-Acquisition Systems
Relay Replacement
Sample-and-Hold Circuits
Key Specifications: Switches and Multiplexers (Low Voltage)
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