Datasheet

Low-Voltage 3.5
ΩΩ
, SPDT,
CMOS Analog Switches
6 Maxim Integrated
MAX4729/MAX4730
50%
0V
R
L
IN
V
IN
V+
t
OFF
0V
t
ON
C
L
V+
V
COM
MAX4729
MAX4730
GND
t
r
< 5ns
t
f
< 5ns
NO/NC
V
NO/NC
V+
OPEN
NC/NO
COM
R
L
IN
V
IN
C
L
V+
V
COM
MAX4729
MAX4730
GND
NO
V
S
V+
V
S
NC
COM
IN
50%
90%90%
V
NO/NC
V
COM
50%
0V
V+
t
BBM
IN
50%
90%
V
S
V
COM
0V
90%
t
BBM
t
BBM =
t
ON(NC) -
t
OFF(NO)
OR t
BBM =
t
ON(NO) -
t
OFF(NC)
Figure 1. Switching Times
Detailed Description
The MAX4729/MAX4730 single-pole/double-throw
(SPDT) switches operate from a single supply ranging
from +1.8V to +5.5V. These switches provide low 3.5Ω
on-resistance (R
ON
), as well as 0.45Ω R
ON
flatness with
a 2.7V supply. These devices typically consume only
1nA of supply current, making them suitable for use in
low-power, portable applications. The MAX4729/
MAX4730 feature low-leakage currents over the entire
temperature range, TTL/CMOS-compatible digital logic,
and excellent AC characteristics.
Applications Information
Digital Control Inputs
The MAX4729/MAX4730 logic inputs accept up to +5.5V,
regardless of supply voltage. For example, with a +3.3V
supply, IN can be driven low to GND and high to +5.5V,
allowing for mixing of logic levels in a system. With a 2.7V
to 3.6V power-supply voltage range, the logic thresholds
are set so V
IL
= 0.4V (max) and V
IH
= 2V (min).
Power-Supply Sequencing
and Overvoltage Protection
Caution: Do not exceed the absolute maximum ratings
because stresses beyond the listed ratings can cause
permanent damage to the device. Proper power-supply
sequencing is recommended for all CMOS devices.
Always apply V+ before applying analog signals, espe-
cially if the analog signal is not current limited.