78Q8392L-28CH ETC [List of Unclassifed Manufacturers], 78Q8392L-28CH Datasheet
78Q8392L-28CH
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78Q8392L-28CH Summary of contents
Page 1
... 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 is available in 16-pin plastic and 28- pin PLCC packages. COLLISION SIGNAL TO DTE DATA TO DTE DATA FROM DTE ...
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... Low Power Ethernet Coaxial Transceiver FUNCTIONAL DESCRIPTION The 78Q8392L incorporates six basic functions of the Ethernet Transceiver, including 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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... LP FILTER TRANSMIT OUTPUT DRIVER TXO TX ON FIGURE 1: 78Q8392L General System Block Diagram 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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... Low Power Ethernet Coaxial Transceiver PIN DESCRIPTION NAME TYPE DESCRIPTION CD+*/CD- O Collision Output. Balanced differential line driver outputs from the collision detect circuitry. The 10 MHz signal from the internal oscillator is transferred to these outputs in the event of collision, excessive transmission (jabber), or during CD Heartbeat condition. These outputs are open emitters ...
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... C for 10 sec 1.0 watts @ 25 C 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 5 78Q8392L Low Power Ethernet Coaxial Transceiver EE MIN NOM MAX +25 ...
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... Low Power Ethernet Coaxial Transceiver DC OPERATING CHARACTERISTICS NOTES 1. Currents into device pins are positive, currents out of device pins are negative. If not specified, voltages are referenced to ground. 2. All typicals are for VEE = -9V -8.55V > VEE > -9.45V. 4. The voltage on TXO is -4V < V(TXO) < 0.0V. ...
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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-) CONDITION 7 78Q8392L Low Power Ethernet Coaxial Transceiver MIN NOM MAX UNIT 400 500 ...
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... Low Power Ethernet Coaxial Transceiver ELECTRICAL SPECIFICATIONS TRANSMIT SPECIFICATIONS The first bit transmitted from TXO may have data and phase violations. The second through last bit reproduce the TX± signal with less than or equal to the specified jitter. There is no logical signal inversion between Tx± and TXO output ...
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... FIGURE 5: Collision Timing TX± t HON CD± FIGURE 6: Heartbeat Timing TX± TXO CD± FIGURE 7: Jabber Timing Low Power Ethernet Coaxial Transceiver 78Q8392L RXI COLLISION CD± DETECTOR OUTPUT RC NETWORK SIMULATES WORST CASE CABLE STEP RESPONSE V CD (MIN) t COFF 78Q8392L ...
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... NSEC RISE AND FALL TIMES RXI NETWORK SIMULATES WORST CASE CABLE JITTER Input jitter <= ±1 nsec RX± Output jitter <= ± 7 nsec Difference <= ± 6 nsec ±t RJ FIGURE 8: Receive Jitter Timing TRANSMIT OUTPUT (TXO) FIGURE 9: Test Loads TXO 10 78Q8392L RX± RECEIVER OUTPUT 25 ...
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... MHz FIGURE 10: Test Circuit for TX± Input Low Power Ethernet Coaxial Transceiver TX+ 39 ± 78Q8392L 39 ±1% TX- GND 11 78Q8392L ...
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... HBE ORDER NUMBER 78Q8392L-CP 78Q8392L-28CH 12 CAUTION: Use handling procedures necessary for a static sensitive component 78Q8392L 28-Pin PLCC PACKAGE MARK 78Q8392L-CP 78Q8392L-28CH VEE VEE VEE VEE VEE VEE RR- . 02/03/98 - rev B ...