78Q8392L-CP Maxim Integrated Products, 78Q8392L-CP Datasheet
78Q8392L-CP
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78Q8392L-CP Summary of contents
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... Manchester-encoded differential Primary functional blocks include the receiver, transmitter, collision detection and jabber timer. This IC may be used in either internal or external MAU environments. The 78Q8392L/A03 is available in lead-free 16-pin plastic and 28-pin PLCC packages. 510 ±5% COLLISION SIGNAL TO DTE DATA TO DTE ...
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... FUNCTIONAL DESCRIPTION The 78Q8392L/A03 incorporates six basic functions of the Ethernet Transceiver, including receiving, transmitting, collision signaling, collision detection, jabber timing, and the heartbeat function. Refer to Figure 1 for a general system block diagram. RECEIVER FUNCTIONS The receiver senses signals through the RXI input, ...
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... CDS LP FILTER TRANSMIT OUTPUT DRIVER TXO TX ON FIGURE 1: 78Q8392L/A03 General System Block Diagram Page HEARTBEAT FUNCTION The 10 MHz CD outputs are enabled for about 1 µs at approximately 1.1 µs after the end of each transmission. The heartbeat signal tells the DTE that the circuit is functioning. This is implemented by starting the heartbeat timer when the valid data signal indicates the end of a transmission ...
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... External Resistor. A fixed 976Ω 1% resistor connected between these pins establishes internal operating currents. RR+/RR- I Note: The previous generation 78Q8392L/A02 used a 1kΩ 1% resistor Receive Input. Connects directly to the coaxial cable. Signals meeting Receiver RXI I squelch requirements are equalized for inter-symbol distortion, amplified, and output at RX+ and RX- pins ...
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... CONDITION See Note 3 See Note 4 See Notes 4 & 5 See Note 9 See Notes 3 & 7 See Note 3, 6 & 7 See Notes 3, 7 & 8 See Note 3 See Note 4 © 2008 Teridian Semiconductor Corporation 78Q8392L/A03 Low Power Ethernet Coaxial Transceiver EE MIN NOM MAX +25 ...
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... CD± output with a DC level in RXI. GND RX+ or CD+ ETHERNET XCVR RX- or CD- Page (continued) determined 510 Ω ±5% 50 µH ± 510 Ω ± FIGURE 2: Test Load for CD± or RX± © 2008 Teridian Semiconductor Corporation 78Q8392L/A03 Low Power Ethernet Coaxial Transceiver + + VCOM 78 ± Rev 1.3 ...
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... Jabber activation delay JA (TX± to TXO off and CD±) t Jabber reset unjab time JR (TX± to TXO and CD±) t Receive Off Pulse Width RO (RX+ to RX-) Page CONDITION © 2008 Teridian Semiconductor Corporation 78Q8392L/A03 Low Power Ethernet Coaxial Transceiver MIN NOM MAX UNIT 400 500 ...
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... RX± output. A high level at RXI produces a positive differential voltage from RX+ to RX-. 50 50% 1st BIT t Rf FIGURE 3: Receiver Timing 50 TON TST 90% 90% 50% 10 FIGURE 4: Transmitter Timing © 2008 Teridian Semiconductor Corporation 78Q8392L/A03 Low Power Ethernet Coaxial Transceiver t RO 90% 10 TOFF 10 Rev 1.3 ...
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... COLLISION DETECTOR C = 150 pF RC NETWORK SIMULATES WORST CASE CABLE STEP RESPONSE V CD (MIN) t CON FIGURE 5: Collision Timing t HON FIGURE 6: Heartbeat Timing t JA FIGURE 7: Jabber Timing © 2008 Teridian Semiconductor Corporation 78Q8392L/A03 Low Power Ethernet Coaxial Transceiver CD± OUTPUT t COFF Rev 1.3 ...
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... WORST CASE CABLE JITTER Input jitter <= ±1 ns RX± Output jitter <= ± Difference <= ± ±t RJ FIGURE 8: Receive Jitter Timing TRANSMIT OUTPUT (TXO) FIGURE 9: Test Loads TXO © 2008 Teridian Semiconductor Corporation 78Q8392L/A03 Low Power Ethernet Coaxial Transceiver 78Q8392L RX± RECEIVER OUTPUT 25 Ω Rev 1.3 ...
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... MHz Page 1:1 39 Ω ± Ω ±1% FIGURE 10: Test Circuit for TX± Input © 2008 Teridian Semiconductor Corporation 78Q8392L/A03 Low Power Ethernet Coaxial Transceiver TX+ 78Q8392L/A03 TX- GND Rev 1.3 ...
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... VEE GND VEE HBE Θ © 2008 Teridian Semiconductor Corporation 78Q8392L/A03 Low Power Ethernet Coaxial Transceiver CAUTION: Use handling procedures necessary for a static sensitive component 78Q8392L 28-Pin PLCC = 45°C/W for the 28_pin PLCC package JA VEE VEE VEE VEE VEE VEE RR- ...
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... MECHANICAL DRAWING (inch / mm) 28-Pin PLCC 16-Pin DIP Page © 2008 Teridian Semiconductor Corporation 78Q8392L/A03 Low Power Ethernet Coaxial Transceiver Rev 1.3 ...
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... ORDER NUMBER 78Q8392LA03-CP/F 78Q8392LA03-28CH/F Comments Final Data Sheet release Corrected package marking error (from Added package dimensions © 2008 Teridian Semiconductor Corporation 78Q8392L/A03 Low Power Ethernet Coaxial Transceiver PACKAGE MARK 78Q8392L-CP SP(Date Code)P3F (Lot Number) 78Q8392L-28CH SP(Date Code)P3F (Lot Number) Rev 1.3 ...