MAX4891ETJ+ Maxim Integrated Products, MAX4891ETJ+ Datasheet

IC ETHERNET SWITCH OCTAL 32TQFN

MAX4891ETJ+

Manufacturer Part Number
MAX4891ETJ+
Description
IC ETHERNET SWITCH OCTAL 32TQFN
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX4891ETJT.pdf (17 pages)

Specifications of MAX4891ETJ+

Function
Ethernet Switch
Circuit
8 x 2:1
On-state Resistance
5.5 Ohm
Voltage Supply Source
Single Supply
Voltage - Supply, Single/dual (±)
3 V ~ 3.6 V
Current - Supply
280µA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
32-WFQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX4890/MAX4891/MAX4892 high-speed analog
switches meet the needs of 10/100/1000 Base-T appli-
cations. These devices switch the signals from two
interface transformers and connect the signals to a sin-
gle 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 tem-
perature range.
19-3577; Rev 2; 8/07
Functional Diagrams and Typical Operating Circuit appear
at end of data sheet.
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.
Notebooks and Docking Stations
Servers and Routers with Ethernet Interfaces
Board-Level Redundancy Protection
SONET/SDH Signal Routing
T3/E3 Redundancy Protection
Video Switching
10/100/1000 Base-T Ethernet LAN Switch
________________________________________________________________ Maxim Integrated Products
General Description
Applications
♦ Single +3.0V to +3.6V Power-Supply Voltage
♦ Low On-Resistance (R
♦ Ultra-Low On-Capacitance (C
♦ Low < 200ps Bit-to-Bit Skew
♦ -3dB Bandwidth: 1GHz
♦ Optimized Pin-Out for Easy Transformer and PHY
♦ Built-In LED Switches for Switching Indicators to
♦ Low 450µA (max) Quiescent Current
♦ Bidirectional 8 to 16 Multiplexer/Demultiplexer
♦ Space-Saving Packages
Note: All devices are specified for operation in the -40°C to
+85°C temperature range.
* EP = Exposed pad.
MAX4890ETJ
MAX4891ETJ
MAX4892ETX
Pin Configurations continued at end of data sheet.
TOP VIEW
Interface
Docking Station
*EP = EXPOSED PAD. CONNECT EP TO GND OR LEAVE UNCONNECTED
32-Pin, 5mm x 5mm, TQFN Package
36-Pin, 6mm x 6mm, TQFN Package
PART
N.C.
N.C.
N.C.
N.C.
A2
A3
A4
A5
1
2
3
4
5
6
7
8
32
9
31
10
PIN-PACKAGE
32 TQFN-EP*
32 TQFN-EP*
36 TQFN-EP*
Ordering Information
30
11
MAX4890
Pin Configurations
12
29
TQFN
ON
13
): 4Ω (typ), 6.5Ω (max)
28
14
27
ON
15
*EP
26
): 6.5pF (typ)
16
25
LED SWITCHES
Features
24
23
22
21
20
19
18
17
2B1
3B1
2B2
3B2
4B1
5B1
4B2
5B2
—
1
3
1

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MAX4891ETJ+ Summary of contents

Page 1

... T3/E3 Redundancy Protection Video Switching Functional Diagrams and Typical Operating Circuit appear at end of data sheet. ________________________________________________________________ Maxim Integrated Products 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. ♦ Single +3.0V to +3.6V Power-Supply Voltage ♦ ...

Page 2

Base-T Ethernet LAN Switch ABSOLUTE MAXIMUM RATINGS V+ .............................................................................-0.3V to +4V SEL (Note 1) ..................................................-0.3V to (V+ +0.3V) A_, _B_, LED_, _LED_ ...................................-0.3V to (V+ +0.3V) Continuous Current (A_ to _B_) ......................................±120mA Continuous Current (LED_ to _LED_) ...............................±30mA Peak ...

Page 3

Base-T Ethernet LAN Switch ELECTRICAL CHARACTERISTICS (continued) (V+ = +3V to +3.6V unless otherwise noted. Typical values are 3.3V MIN MAX PARAMETER SYMBOL Crosstalk V Differential Crosstalk V ...

Page 4

Base-T Ethernet LAN Switch (V+ = 3.3V +25°C, unless otherwise noted.) A ON-RESISTANCE vs 4.0 3 3.0V, 3.3V, 3.6V 3.6 3.4 3.2 3.0 0 0.9 1.8 2.7 V (V) A_ LED_ ON-RESISTANCE vs. ...

Page 5

Base-T Ethernet LAN Switch (V+ = 3.3V +25°C, unless otherwise noted.) A TURN-ON/-OFF TIME vs. SUPPLY VOLTAGE OFF 3.0 3.2 3.4 3.6 SUPPLY VOLTAGE (V) RISE-/FALL-TIME PROPAGATION DELAY ...

Page 6

Base-T Ethernet LAN Switch (V+ = 3.3V +25°C, unless otherwise noted.) A DIFFERENTIAL RETURN LOSS vs. FREQUENCY 0 -10 -20 -30 - 100 FREQUENCY (MHz) SINGLE-ENDED CROSSTALK vs. FREQUENCY 0 -10 -20 -30 -40 -50 ...

Page 7

Base-T Ethernet LAN Switch PIN MAX4890 MAX4891 MAX4892 31, 32 31 7–10 7–10 7–10 — — — 3– — ...

Page 8

Base-T Ethernet LAN Switch INSERTION LOSS MINI CKT 50Ω BALUN 1 6 TRACE 5 50Ω 50Ω TRACE NETWORK 3 4 TRACE ANALYZER 50:100 CB1 Figure 1. Differential Insertion Loss RETURN LOSS MAX4892 36 TQFN A2 2 R16 49.9Ω 3B1 ...

Page 9

Base-T Ethernet LAN Switch SINGLE-ENDED BANDWIDTH NETWORK ANALYZER SINGLE-ENDED CROSSTALK NETWORK ANALYZER NETWORK ANALYZER SINGLE-ENDED OFF-ISOLATION NETWORK ANALYZER Figure 3. Single-Ended Bandwidth, Crosstalk and Off-Isolation Detailed Description The MAX4890/MAX4891/MAX4892 are high-speed ana- log switches targeted for 10/100/1000 Base-T applica- ...

Page 10

Base-T Ethernet LAN Switch DIFFERENTIAL CROSSTALK TRANSMIT CKT NETWORK ANALYZER DIFFERENTIAL CROSSTALK RECEIVE CKT NETWORK ANALYZER Figure 4. Differential Crosstalk Analog Signal Levels The on-resistance of the MAX4890/MAX4891/MAX4892 is very low and stable as the analog input signals are ...

Page 11

Base-T Ethernet LAN Switch SEL 1.25V t ON 90% t OFF 10% Figure 5. ENABLE and DISABLE Times A_ t PLHX _B_ t PLHY _B_ PULSE SKEW = ...

Page 12

Base-T Ethernet LAN Switch I 100 90% AMPERES 36.8% 10% 0 TIME CURRENT WAVEFORM Figure 9. Human Body Model Current Waveform 12 ______________________________________________________________________________________ ETHERNET PHYs OR T3/E3 LIUs PEAK-TO-PEAK RINGING (NOT ...

Page 13

Base-T Ethernet LAN Switch DOCKING STATION NOTEBOOK TRD0_P A0 TRD0_N A1 TRD1_P A2 TRD1_N A3 ETHERNET PHY/MAC TRD2_P A4 TRD2_N A5 TRD3_P A6 TRD3_N A7 LED_OUT LED_ SEL_DOCK ______________________________________________________________________________________ Typical Operating Circuit CONNECTOR 0B2 1B2 2B2 3B2 4B2 5B2 ...

Page 14

Base-T Ethernet LAN Switch SEL 14 ______________________________________________________________________________________ A0 0B1 A1 1B1 0B2 1B2 A2 2B1 A3 3B1 2B2 3B2 4B1 A4 A5 5B1 4B2 5B2 A6 6B1 A7 7B1 6B2 7B2 ...

Page 15

Base-T Ethernet LAN Switch LED0 LED1 LED2 SEL ______________________________________________________________________________________ Functional Diagrams (continued) 0B1 1B1 0B2 1B2 2B1 3B1 2B2 3B2 4B1 5B1 4B2 5B2 6B1 7B1 6B2 7B2 0LED1 0LED2 1LED1 ...

Page 16

Base-T Ethernet LAN Switch TOP VIEW LED0 3 0LED1 4 MAX4891 0LED2 TQFN *EP = EXPOSED PAD. ...

Page 17

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 17 © 2007 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

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