MAX4890 Maxim, MAX4890 Datasheet
MAX4890
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MAX4890 Summary of contents
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... 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 ...
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... Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ...
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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 ...
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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. ...
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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 ...
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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 ...
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... Base-T Ethernet LAN Switch PIN MAX4890 MAX4891 MAX4892 31, 32 31 7–10 7–10 7–10 — — — 3– — — — 12 — — 13 — — 14 13, 14, 17, 13, 14, 17, 15, 16, 19, 18, 21, 22, ...
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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 ...
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... Detailed Description The MAX4890/MAX4891/MAX4892 are high-speed ana- log switches targeted for 10/100/1000 Base-T applica- tions typical application, the MAX4890/MAX4891/ MAX4892 switch the signals from two separate inter- face transformers and connect the signals to a single 10/100/1000 Base-T Ethernet PHY (see the Typical Operating Circuit ) ...
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... 50:100 CB5 Line-Card Redundancy (Ethernet T3/E3) Figure 10 shows the MAX4890/MAX4891/MAX4892 in a line-card redundancy configuration. Caution: Do not exceed the absolute maximum ratings. Stresses beyond the listed ratings may cause perma- nent damage to the device. Proper power-supply sequencing is recommended for all CMOS devices. Always apply V+ before applying analog signals, especially if the analog signal is not current limited ...
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... THE MAX4890/MAX4891/MAX4892 SWITCHES ARE FULLY BIDIRECTIONAL. Figure 7. Output Skew ______________________________________________________________________________________ 2.5V 1.25V PLH t OFF 90 _B_ A_ 90% PULSE SKEW = SK(p) THE MAX4890/MAX4891/MAX4892 SWITCHES ARE FULLY BIDIRECTIONAL. 0V Figure 6. Propagation Delay Times 3.0V 2.0V 1.0V 1MΩ t PHLX CHARGE-CURRENT LIMIT RESISTOR V OH 2.0V HIGH- VOLTAGE SOURCE t PHLY ...
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... CURRENT WAVEFORM Figure 9. Human Body Model Current Waveform 12 ______________________________________________________________________________________ ETHERNET PHYs OR T3/E3 LIUs PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) PRIMARY CARD ETHERNET PHYs OR T3/E3 LIUs PROTECTION CARD Figure 10. Typical Application for Line-Card Redundancy MAX4890 MAX4891 MAX4892 PROTECTION SWITCH TRANSFORMER SWITCHING CARD ...
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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 ...
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... A1 1B1 0B2 1B2 A2 2B1 A3 3B1 2B2 3B2 4B1 A4 A5 5B1 4B2 5B2 A6 6B1 A7 7B1 6B2 7B2 LED0 MAX4890 SEL Functional Diagrams 0B1 1B1 0B2 1B2 2B1 3B1 2B2 3B2 4B1 5B1 4B2 5B2 6B1 7B1 6B2 7B2 0LED1 0LED2 MAX4891 ...
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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 ...
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... 4B2 5B2 *EP = EXPOSED PAD. CONNECT EP TO GND OR LEAVE UNCONNECTED For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE 32 TQFN-EP 36 TQFN-EP 27 SEL 2B1 26 3B1 25 2B2 24 3B2 23 MAX4892 4B1 22 21 5B1 ...
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... Added exposed pad information 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 © ...