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Maxim > Design Support > Technical Documents > Application Notes > Analog Switches and Multiplexers > APP 4653
Keywords: digital serial interface, MAX4820, relay driver, DIN, /CS, eSATA, MAX4951, IBIS, MAX4950, S-
parameter, LVCMOS, VGA, LVDS, MAX4888, MAX4889, MAX4885, RGB, MAX4890, Ethernet, Gigabit
Ethernet, LAN, MAX4895, SDA1, SCL1, PCIE, MAX4989, NC1+, NC1-, SPDT, PHY, SATA, SGMII, XAUI
APPLICATION NOTE 4653
FAQs about Analog Switches
By: Micheal Scherrenburg
Sep 17, 2010
Abstract:
This application
note answers general frequently asked questions (FAQs) about analog switches.
The FAQs also cover topics specific to Maxim switches.
This set of frequently asked questions (FAQs) addresses some of the more common issues that arise when
using Maxim broadband analog switches in new or existing designs. The questions are divided into different
categories based on specific information areas. It is possible for questions to span multiple categories.
Also see
Application note 638, "Selecting the Right CMOS Analog Switch."
Application note 4714, "Webinar: Specification and Selection of Analog Switches and Multiplexers"
LAN Questions
1. How does the MAX4890 pass Ethernet signals, including Gigabit Ethernet, when it has a bandwidth of
only 650MHz?
2. I cannot switch 625Mbps LVDS signals with the MAX4890, yet it apparently passes 1Gbps Ethernet.
Why is that? Please explain.
3. The MAX4890 does not appear to transmit Ethernet signals properly and the signals coming out appear
to be severely clipped. How can I fix this?
4. How can I evaluate or prototype the MAX4890 into my design before including it in my circuit?
PCI Express® Questions
1. For each pair of pins switched on the MAX4888/MAX4889 devices, for example, NC1+ and NC1-, must
they switch a differential pair?
2. What Maxim product can I use to switch SGMII?
3. What Maxim product can I use to switch XAUI signals?
4. I need to simulate an application that includes the MAX4889B and MAX4889C. What can Maxim provide
to help with this?
5. Is it possible to switch completely different types of signals like SATA or LVCMOS with the MAX4889?
6. What requirements are there for using the MAX4950 in a PCIe® hot-plug application?
7. Why does Maxim not provide an IBIS model of the MAX4950?
8. I need to switch two XAUI interfaces. What Maxim silicon would help me do this?
9. I need to switch some LVDS interfaces. Can I use the MAX4889A?
SAS/SATA Questions
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