MAX4890E Datasheet, PDF (1/13 Pages) Maxim Integrated Products – 1000 Base-T, ±15kV ESD Protection LAN Switches

19-0624; Rev 0; 8/06
1000 Base-T, ±15kV ESD Protection LAN Switches
General Description
The MAX4890E/MAX4892E meet the needs of high-speed
differential switching. The devices handle the needs of
Gigabit Ethernet (10/100/1000) Base-T switching as
well as LVDS and LVPECL switching. The MAX4890E/
MAX4892E provide enhanced ESD protection up to
±15kV, and excellent high-frequency response, making
the devices especially useful for interfaces that must go to
an outside connection.
Both devices provide extremely low capacitance
(C_ON), as well as low resistance (R_ON), for low-insertion
loss and very wide bandwidth. In addition to the four
pairs of DPDT switches, the MAX4892E provides LED
switching for laptop computer/docking station use.
The MAX4890E/MAX4892E are pin-for-pin equivalents
to the MAX4890/MAX4892 and can replace these
devices for those applications requiring the enhanced
ESD protection. Both devices are available in space-
saving TQFN packages and operate over the standard
-40°C to +85°C temperature range.
Applications
Notebooks and Docking Stations
Servers and Routers with Ethernet Interfaces
Board-Level Redundancy Protection
SONET/SDH Signal Routing
T3/E3 Redundancy Protection
LVDS and LVPECL Switching
Pin Configurations
TOP VIEW
A1 1
A2 2
A3 3
LED0 4
0LED1 5
0LED2 6
A4 7
A5 8
A6 9
MAX4892E
*EP
27 SEL
26 2B1
25 3B1
24 2B2
23 3B2
22 4B1
21 5B1
20 4B2
19 5B2
Features
o ±15kV ESD Protected Per MIL-STD-883, Method
3015
o Single +3.0V to +3.6V Power-Supply Voltage
o Low On-Resistance (R_ON): 4Ω (typ), 6.5Ω (max)
o Ultra-Low On-Capacitance (C_ON): 8pF (typ)
o -23dB Return Loss (100MHz)
o -3dB Bandwidth: 650MHz
o Optimized Pin Out for Easy Transformer and PHY
Interface
o Built-In LED Switches for Switching Indicators to
Docking Station (MAX4892E)
o Low 450µA (max) Quiescent Current
o Bidirectional 8 to 16 Multiplexer/Demultiplexer
o Standard Pin Out, Matching the MAX4890 and
MAX4892
o Space-Saving Lead-Free Packages
32-Pin, 5mm x 5mm, TQFN Package
36-Pin, 6mm x 6mm, TQFN Package
Ordering Information
PART
PIN-
PACKAGE
LED
SWITCHES
PKG
CODE
MAX4890EETJ+ 32 TQFN-EP*
—
T-3255-4
MAX4892EETX+ 36 TQFN-EP*
3
T-3666-3
+Denotes lead-free package.
Note: All devices are specified over the -40°C to +85°C operating
temperature range.
*EP = Exposed pad.
Eye Diagram
CH2: 4B2, 100mV/div
TQFN
*EXPOSED PAD CONNECTED TO GND.
Pin Configurations continued at end of data sheet.
CH1: 5B2, 100mV/div
f = 125MHz
Typical Operating Circuit and Functional Diagrams appear
at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.