MAX14778

Dual ±25V Above- and Below-the-Rails 4:1 Analog Multiplexer

Simplify Designs with the Industry's First ±25V Above- and Below-the-Rails Multiplexer


Description

The MAX14778 dual 4:1 analog multiplexer supports analog signals up to ±25V with a single 3.0 to 5.5V supply. Each multiplexer has separate control inputs to allow independent switching, making the device ideal for multiplexing different communications signals with the same connector pins. Extended ESD protection of ±6kV (Human Body Model) enable direct interfacing to cables and connectors.

The MAX14778 features a low 1.5Ω (max) on-resistance and 3mΩ (typ) flatness to maximize signal integrity over the entire common-mode voltage range. Each multiplexer can carry up to 300mA of continuous current through the multiplexer in either direction.

The MAX14778 supports switching of full-speed USB 1.1 signals (12Mbps) and RS-485 data rates of up to 20Mbps.

The MAX14778 is available in a 20-pin (5mm x 5mm) TQFN package and is specified over the -40°C to +85°C extended temperature range.
MAX14778: Typical Operating Circuit MAX14778: Typical Operating Circuit Enlarge+

Key Features

  • ±25V Signal Range
  • Single 3.0V to 5.5V Supply
  • Two Independent Multiplexers
  • 1.5Ω RON (max)
  • 3mΩ RON Flatness (typ)
  • 300mA Maximum Current Through Multiplexer
  • 78pF Input Capacitance
  • 75MHz Large-Signal Bandwidth
  • Break-Before-Make Operation
  • Extended ESD Protection on A_ and B_ Pins
    • ±6kV Human Body Model (HBM)

Applications/Uses

  • Audio/Data Multiplexing
  • Communication Systems
  • Connector Sharing
  • Gaming Machines
  • Handheld Industrial Devices
  • POS Peripherals
  • RS-485/RS-232/USB 1.1 Multiplexing
Part Number Config. Channels VSUPPLY (Single)
(V)
VSUPPLY (Single)
(V)
VSUPPLY (Dual)
(±V)
VSIGNAL
(V)
VSIGNAL
(V)
Dynamic Range (max)
(V)
RON
(Ω)
RFLAT(ON)
(Ω)
RFLAT(ON)
(Ω)
Bandwidth
(MHz)
IL(OFF)
(nA)
QINJECTION
(pC)
CON
(pF)
Budgetary
Price
min max max min max max max typ max max See Notes
MAX14778  4-to-1 2 3 5.5 25 -25 25 50 1.5 0.003 0.003 75 200 1720 78 $4.62 @1k
See All Switches and Multiplexers (Low Voltage) (183)

Part Number Functions Config. Channels VSUPPLY (Single)
(V)
VSUPPLY (Single)
(V)
VSUPPLY (Dual)
(±V)
RON
(Ω)
Bandwidth
(MHz)
IL(OFF)
(nA)
QINJECTION
(pC)
CON
(pF)
Budgetary
Price
min max max max max See Notes
MAX14778  Mux 4-to-1 2 3 5.5 25 1.5 75 200 1720 78 $4.62 @1k
See All Switches and Multiplexers (Mid and High Voltage) (312)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX14778EVKIT: Evaluation Kit for the MAX14778

Technical Documents

App Note 5758 Analog Integration Drives Factory Integration

Quality and Environmental Data

Product Reliability Reports: MAX14778.pdf 
Lead-Free Package Tin (Sn) Whisker Reports
 

Related Resources


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