MAX14759 Datasheet, PDF (12/16 Pages) Maxim Integrated Products – Above- and Below-the-Rails Low On-Resistance Analog Switches

MAX14759/MAX14761/MAX14763
Above- and Below-the-Rails
Low On-Resistance Analog Switches
Differential Termination Resistor Switch
The MAX14759 can be used to switch a differential termi-
nation resistor in or out. In RS-485 and CAN applications,
both ends of high-speed transmission lines require ter-
mination. Figures 8 and 9 show an application of RS-485
and CAN termination using two equal resistors. These
switches support RS-485’s high -7V to +12V common-
mode range.
In RS-232/RS-485 multiprotocol applications, the
MAX14759 can be used for switching in the line-termi-
nating resistors for RS-485 usage, and can disable the
termination resistor for RS-232 operation, as shown in
Figure 10.
The MAX14761 is ideal for switching in fail-safe biasing
resistors in RS-485 applications, as shown in Figures 11
and 12.
Audio Amplifier Switch
The MAX14763 is used for selecting between audio
amplifier sources to drive loudspeaker applications
(Figures 13 and 14.)
VCC
A
MAX14840
TERMINATION
CONTROL
GND
RT/2
A
EN
B
MAX14759
R_T/2
Figure 8. RS-485 Termination Switch
CANH
RT/2
MAX3051
A
EN
CTRL
MAX14759
B
RT/2
CANL
Figure 9. CAN Termination Switch
Maxim Integrated
RT/2
A
MAX14759 EN
CTRL
B
RT/2
MAX3051
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