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AM7996DC Folha de dados(PDF) 7 Page - Advanced Micro Devices |
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AM7996DC Folha de dados(HTML) 7 Page - Advanced Micro Devices |
7 / 18 page AMD 7 Am7996 Figure 2 is an external component diagram showing how to implement the transmit mode collision detect levels recommended by IEEE 802.3. Figure 3 on the following page shows how to implement the receive mode collision detect levels recommended by IEEE 802.3. Receive mode collision detect threshold levels of the Am7996 are implemented by adding R9, R10 and C4. For the values of the components shown in Figure 3, a nominal receive mode collision detect threshold of –1.5 V, for a –1.404 V to –1.581 V window, is achieved. Notes: 1. CL is the effective load capacitance across R6; CC is the compensation capacitance (CC = 1/3 CL). 2. D2 can be eliminated in Cheapernet (IEEE 802.3, 10BASE2) applications. 3. Shown with SQE Test disabled. 4. Discrete Power Supply or Hybrid-Hybrid DC-DC Converter Manufacturers include: Ethernet (IEEE 802.3, 10BASE5) Reliability: 2E12R9 Valor Electronics: PM1001 Cheapernet (IEEE 802.3, 10BASE2) Reliability Inc: 2VP5U9 Valor Electronics: PM7102 5. The capacitance of C3, Am7996 package, D3 and the printed circuit board should add up to 180 pF ± 20%. 6. The capacitance of C1, Am7996 package and the printed circuit board should add up to 39 pF. 7. Figure 2 used for production testing of all parameters that are tested. 07506E-5 COLL RCV XMT 1:1 1:1 1:1 Power (DTE) (Note 3) 2 3 4 5 GND –9 V 6 7 8 9 10 R1 40.2 Ω 1% R3 174 Ω 9.09 Ω 1% (Note 5) 1N4001 C3 180 pF (Note 1) 9.09 Ω 1% 1N4150 D2 D1 CC R6 24.9 k Ω 1% CL (Note 6) C1 39 pF C2 0.1 µF 1% 1% R4 1.1 k Ω Coax Connector 1 20 19 18 17 16 15 14 13 12 11 MAU Power Supply (Note 4) R2 40.2 Ω 1% 1% (75 µH) PE64102/PE64107 (or equivalent) VCC1 CI+ CI– DI+ DI– VCREF SQE^TEST DO+ DO– VEE COLL OSC VCC2 VCOL NC RXT Tap Shield VTX- TXT VTX+ NC R5 75 k Ω (Note 1) D3 (Note 2) R8 Am7996 R7 Figure 2. Am7996 External Component Diagram for Transmit Mode Collision Detect |
Nº de peça semelhante - AM7996DC |
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Descrição semelhante - AM7996DC |
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