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

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.

Key Features

Flexible Multiplexer Switches a Wide Array of High-Voltage and Low-Voltage Signals Such as RS485, RS232, and USB 1.1
- Two Independent Multiplexers
- Break-Before-Make Operation
- 1.5Ω RON (max)
- 3mΩRON Flatness (typ)
- 300mA Maximum Current Through Multiplexer
- 78pF Input Capacitance
- 75MHz Large-Signal Bandwidth
Ideal for Space-Constrained and Mobile Applications
- 20-Pin TQFN (5mm x 5mm) Package
Wide Signal Range Supported from Single-Supply Voltage Eliminates Negative Power Supply
- ±25V Signal Range
- Single 3.0V to 5.5V Supply
ESD Protection Circuitry Eliminates Need for External Protection Circuitry
- Extended ESD Protection on A_ and B_ Pins
- ±6kV Human Body Model (HBM)

MAX14778: Typical Operating Circuit

Applications/Uses

Audio/Data Multiplexing
Communication Systems
Connector Sharing
Gaming Machines
Handheld Industrial Devices
POS Peripherals
RS-485/RS-232/USB 1.1 Multiplexing

DataSheet

title	Download file
MAX14778 Data Sheet	MAX14778.pdf

Parametrics

Part Number	Config.	Channels	V_SUPPLY (Single) (V)	V_SUPPLY (Single) (V)	V_SUPPLY (Dual) (±V)	V_SIGNAL (V)	V_SIGNAL (V)	Dynamic Range (max) (V)	R_ON (Ω)	R_FLAT(ON) (Ω)	R_FLAT(ON) (Ω)	Bandwidth (MHz)	I_L(OFF) (nA)	Q_INJECTION (pC)	C_ON (pF)	Package/Pins	Budgetary Price
Part Number	Config.	Channels	min	max	max	min	max	max	max	typ	max	Bandwidth (MHz)	max	Q_INJECTION (pC)	C_ON (pF)	Package/Pins	See Notes
MAX14778	4-to-1	2	3	5.5	25	-25	25	50	1.5	0.003	0.003	75	200	1720	78	THIN QFN/20 TQFN/20	$4.62 @1k

Part Number	Functions	Config.	Channels	V_SUPPLY (Single) (V)	V_SUPPLY (Single) (V)	V_SUPPLY (Dual) (±V)	R_ON (Ω)	Bandwidth (MHz)	I_L(OFF) (nA)	Q_INJECTION (pC)	C_ON (pF)	Package/Pins	Budgetary Price
Part Number	Functions	Config.	Channels	min	max	max	max	Bandwidth (MHz)	max	Q_INJECTION (pC)	C_ON (pF)	Package/Pins	See Notes
MAX14778	Mux	4-to-1	2	3	5.5	25	1.5	75	200	1720	78	THIN QFN/20 TQFN/20	$4.62 @1k

Design kits & evaluation modules

MAX14778EVKIT

Quality and Environmental Data

MAX14778.pdf

Ordering Information

Part Number	Status	Package	Temp	RoHS
MAX14778EETP+	No Longer Available	TQFN,;20 pin;26 mm²	-40°C to +85°C	Lead Free
MAX14778EETP+T	Future Product	QFN;	-40°C to +85°C	See data sheet
MAX14778ETP+	Active	THIN QFN,;20 pin;TQFN-C;	-40°C to +85°C	Lead Free
MAX14778ETP+T	Active	THIN QFN,;20 pin;TQFN-C;	-40°C to +85°C	Lead Free

MAX14778.pdf MAX14778

Analog Integration Drives Factory Integration MAX31855

MAX14778.pdf MAX14778