MAX4890：10/100/1000 Base-T Ethernet LAN Switch _ BDTIC a Leading Distributor in China

MAX4890：10/100/1000 Base-T Ethernet LAN Switch

The MAX4890/MAX4891/MAX4892 high-speed analog switches meet the needs of 10/100/1000 Base-T applications. These devices switch the signals from two interface transformers and connect the signals to a single 10/100/1000 Base-T Ethernet PHY, simplifying docking station design and reducing manufacturing costs. The MAX4890/MAX4891/MAX4892 can also route signals from a common interface transformer to two different boards in board-redundancy applications. The MAX4890/MAX4891/MAX4892 switches provide an extremely low capacitance and on-resistance to meet Ethernet insertion and return-loss specifications. The MAX4891/MAX4892 feature one and three built-in LED switches, respectively. The MAX4890/MAX4891/MAX4892 are available in space-saving 32- and 36-lead TQFN packages, significantly reducing the required PC board area. These devices operate over the -40°C to +85°C temperature range.

Key Features

Single +3.0V to +3.6V Power-Supply Voltage
Low On-Resistance (RON): 4Ω (typ), 6.5Ω (max)
Ultra-Low On-Capacitance (CON): 6.5pF (typ)
Low < 200ps Bit-to-Bit Skew
-3dB Bandwidth: 1GHz
Optimized Pin-Out for Easy Transformer and PHY Interface
Built-In LED Switches for Switching Indicators to Docking Station
Low 450µA (max) Quiescent Current
Bidirectional 8 to 16 Multiplexer/Demultiplexer
Space-Saving Packages
- 32-Pin, 5mm x 5mm, TQFN Package
- 36-Pin, 6mm x 6mm, TQFN Package

MAX4890, MAX4891, MAX4892: Typical Operating Circuit

Applications/Uses

Board-Level Redundancy Protection
Notebooks and Docking Stations
Servers and Routers with Ethernet Interfaces
SONET/SDH Signal Routing
T3/E3 Redundancy Protection
Video Routing and Switching Systems

DataSheet

title	Download file
MAX4890-MAX4892 Data Sheet	MAX4890-MAX4892.pdf

Parametrics

Part Number	Protocol	Functions	Config.	Channels	Normal Position	V_SUPPLY (Single) (V)	V_SUPPLY (Single) (V)	R_ON (Ω)	Bandwidth (MHz)	I_L(OFF) (nA)	t_ON (ns)	t_OFF (ns)	C_ON (pF)	C_OFF (pF)	Package/Pins	Budgetary Price
Part Number	Protocol	Functions	Config.	Channels	Normal Position	min	max	max	Bandwidth (MHz)	max	min	max	C_ON (pF)	C_OFF (pF)	Package/Pins	See Notes
MAX4890	LAN	Mux/DeMux	1-to-2	4	Open	3	3.6	6.5	1000	1	50	40	6.5	3.5	TQFN/32	$2.44 @1k
MAX4891				5											TQFN/32	$2.56 @1k
MAX4892				7											TQFN/36	$2.99 @1k

Quality and Environmental Data

MAX4890.pdf

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX4890ETJ	No Longer Available	MAX4890ETJ+	TQFN,;32 pin;26 mm²	-40°C to +85°C	No
MAX4890ETJ+	Active		TQFN,;32 pin;26 mm²	-40°C to +85°C	Lead Free
MAX4890ETJ+T	Active		TQFN,;32 pin;26 mm²	-40°C to +85°C	Lead Free
MAX4890ETJ-T	No Longer Available	MAX4890ETJ+T	QFN;32 pin	-40°C to +85°C	See data sheet

MAX4890-MAX4892.pdf MAX4892

MAX4890.pdf MAX4890

MAX4890-MAX4892.pdf MAX4890