MAX9157 Maxim, MAX9157 Datasheet
MAX9157
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MAX9157 Summary of contents
Page 1
... Rev 0; 1/02 General Description The MAX9157 is a quad bus LVDS (BLVDS) transceiver for heavily loaded, half-duplex multipoint buses. Small 32-pin QFN and TQFP packages and flow-through pinouts allow the transceiver to be placed near the con- nector for the shortest possible stub length. The MAX9157 drives LVDS levels into a 27Ω ...
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... A MAX9157EGJ (derate 21.2mW/°C above +70°C) .....1702mW 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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DC ELECTRICAL CHARACTERISTICS (continued 3.0V to 3.6V 27Ω ±1%, differential input voltage | DE_ = high, RE_ = low, T input voltage range = 3.3V 0.2V, ...
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... L Figures 5, 6 MAX9157EHJ MAX9157EGJ RE_ = high 10pF, L Figures 5, 6 MAX9157EHJ MAX9157EGJ RE_ = high 10pF, L Figures 5, 6 MAX9157EHJ MAX9157EGJ RE_ = high 10pF, L Figures 5, 6 MAX9157EHJ RE_ = high 10pF, Figures MAX9157EGJ DE_ = low, Figures =15pF MAX9157EHJ L MAX9157EGJ DE_ = low, Figures 7, 8; ...
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... LVDS inputs = 85MHz, input fre 1.2V to 1.8V, DE_ = high, RE_ = low 1.2V, and T = +25°C.) (Notes 3 and MIN TYP 0.7 1.2 MAX9157EGJ 6.74 MAX9157EHJ 6.82 MAX9157EGJ 6.49 MAX9157EHJ 6.79 MAX9157EGJ 4.67 MAX9157EHJ 4.57 MAX9157EGJ 5.43 MAX9157EHJ 4. SKD1 PHLD PLHD any other channel on the PLHD PHLD = 20MHz +25°C, unless otherwise noted DIFFERENTIAL OUTPUT VOLTAGE vs ...
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Quad Bus LVDS Transceiver (V = 3.3V 27Ω, driver C = 10pF, receiver DRIVER TRANSITION TIME vs. LOAD CAPACITANCE 1.3 1.2 t THL 1.1 1 LOAD CAPACITANCE (pF) DRIVER TRANSITION TIME ...
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... RO3 31 DIN4 32 RO4 EP* EXPOSED PAD *MAX9157EGJ only. _______________________________________________________________________________________ Quad Bus LVDS Transceiver No Connection. Not internally connected. Digital Power Supply Digital Ground Receiver Channels 3 and 4 Enable (Enable Low). Drive RE34 low to enable receiver channels 3 and 4. Driver Channels 3 and 4 Enable (Enable High). Drive DE34 high to enable driver channels 3 and 4 ...
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... Logic states are determined by the direction of current flow through the termination resistor. Fail-Safe Receiver Inputs The fail-safe feature of the MAX9157 sets the output high when the differential input is: • Open • Undriven and shorted • Undriven and terminated ...
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... The total load seen by the dri- ver is 27Ω. The MAX9157 drives higher differential signal levels into lighter loads. (See Differential Output Voltage vs. Output Load graph in the Typical Operating Char- acteristics section) ...
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... Traces, Cables, and Connectors The characteristics of input and output connections affect the performance of the MAX9157. Use con- trolled-impedance traces, cables, and connectors with matched characteristic impedance. Ensure that noise couples as common mode by run- ning the traces of a differential pair close together ...
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... PLZ DO_+/RIN_+ PULSE GENERATOR DO_-/RIN_- 50Ω* 50Ω* RECEIVER ENABLED 1/4 MAX9157 *50Ω REQUIRED FOR PULSE GENERATOR TERMINATION DIN_ DE_ 50Ω 1/4 MAX9157 50 PZH V OH 50% 1.2V 1.2V 50 PZL RO_ C L DO_+/RIN_+ +1.2V DO_-/RIN_- ...
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... Figure 10. Receiver High-Impedance Waveforms 12 ______________________________________________________________________________________ PLHD 80% 50% 20% t TLH DO_+/RIN_+ DO_-/RIN_- RE_ 50Ω 1/4 MAX9157 C INCLUDES LOAD AND TEST JIG CAPACITANCE FOR t AND t MEASUREMENTS PZL PLZ S = GND FOR t AND t MEASUREMENTS. 1 PZH PHZ 50% t PZL ...
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... DO4-/RIN4- TOP VIEW N. GND 4 RE34 5 DE34 6 AGND Pin Configurations N.C. 23 N.C. 22 N.C. 21 GND MAX9157 20 RE12 DE12 17 AGND TQFP N. N.C. 21 GND MAX9157 20 RE12 DE12 17 AGND QFN ...
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Quad Bus LVDS Transceiver 14 ______________________________________________________________________________________ Package Information ...
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Quad Bus LVDS Transceiver ______________________________________________________________________________________ Package Information (continued) 15 ...
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... Quad Bus LVDS Transceiver 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 ____________________ 16 © ...