
General Description
The MAX4645/MAX4646 single-pole, single-throw (SPST)
analog switches feature a 2.5
typical on-resistance
(R
ON
) from a +5V supply. R
ON
is flat (0.4
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 mechani-
cal 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 sup-
ply, making them ideal for use in battery-powered applica-
tions. The MAX4645/MAX4646 have fast switching speeds
of 12ns turn-on time (t
ON
) and 8ns turn-off time (t
OFF
).
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.
________________________Applications
Battery-Powered Systems
Audio and Video Signal Routing
Low-Voltage Data-Acquisition Systems
Sample-and-Hold Circuits
Communications Circuits
Relay Replacement
____________________________Features
o
+1.8V to +5V Single-Supply Operation
o
Guaranteed R
ON
2.5
max (5V supply)
3.5
max (3V supply)
o
R
ON
30
typ Over Temperature
t
ON
40ns typ, t
OFF
20ns typ
o
Low R
ON
Flatness: 0.4
max
o
Guaranteed Low Leakage Currents
±0.25nA at +25°C
o
Rail-to-Rail Output Capability
o
TTL/CMOS-Logic Compatible
o
-75dB Off-Isolation at 1MHz
o
Low Distortion: 0.014% typ
M
Fast, Low-Voltage, 2.5
, SPST,
CMOS Analog Switches
________________________________________________________________
Maxim Integrated Products
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1
19-1653; Rev 1; 7/00
Ordering Information
Pin Configurations/Functional Diagrams/Truth Tables
μ
MAX/SO/DIP
PIN 5
5
XYZA
4
1
2
3
NOTE: SOT23-5 PACKAGE
HAS LETTERING NEAREST PIN 5.
TOP VIEW
IN
GND
1
5
V+
COM
MAX4645
2
3
4
SOT23-5
INPUT
0
1
SWITCH STATE
MAX4645
OFF
ON
MAX4646
ON
OFF
SWITCHES SHOWN FOR LOGIC 0 INPUT.
NO
μ
MAX/SO/DIP
IN
GND
1
5
V+
COM
MAX4646
2
3
4
SOT23-5
NC
MAX4645EUT-T
MAX4645EUA
-40°C to +85°C
-40°C to +85°C
PART
TEMP. RANGE
MAX4645
EUK-T
-40°C to +85°C
MAX4646
EUK-T
MAX4646EUT-T
MAX4646EUA
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
8 μMAX
6 SOT23-6
5 SOT23-5
8 μMAX
6 SOT23-6
5 SOT23-5
PIN-
PACKAGE
—
AAHM
ADOC
—
AAHL
ADOB
TOP
MARK
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
Pin Configurations/Functional Diagrams/
Truth Tables continued at end of data sheet.