AM7996PTR 데이터 시트보기 (PDF) - Advanced Micro Devices

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AM7996PTR

IEEE 802.3/Ethernet/Cheapernet Transceiver

Advanced Micro Devices 

AMD

PE64102/PE64107 (or equivalent)

(75 µH)

1:1

COLL

1:1

RCV

1:1

XMT

R1

40.2 Ω

1%

R2

40.2 Ω

1%

1 VCC1

VCC2 20

R4

1% 1.1 kΩ

2 CI+ COLL OSC 19

3 CI–

VCOL 18

4 DI+

NC 17

Am7996

R3 5 DI–

RXT 16

174 Ω 6

1%

7

(Note 3)

VCREF

SQE^TEST

NC 15

Tap 14

Shield

8 DO+

VTX– 13

C4 0.1 µF

R9

499 Ω

1%

(Note 7)

R10

150 kΩ

1%

180 pF

9 DO–

TXT 12

10 VEE

VTX+ 11

9.09 Ω

1%

C1

39 pF

(Note 6)

CL

(Note 1)

C3

(Note 5)

C2

0.1 µF

R6

24.9 kΩ

1%

1N4001

D3

R7

9.09 Ω

1%

Coax

Connector

R5

75 kΩ

1%

CC (Note 1)

(Note 2)

D2 D1

1N4150

Power (DTE)

–9 V

GND

MAU Power Supply

(Note 4)

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. R9, R10 and C4 are for Receive Mode Collision detection only.

07506E-6

Figure 3. Am7996 External Component Diagram with Collision Threshold Modified

for Receive Mode Collision Detect

8

Am7996

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