AM7996DCTR AMD [Advanced Micro Devices], AM7996DCTR Datasheet - Page 8

• Manufacturer Part Number: AM7996DCTR
• Description: IEEE 802.3/Ethernet/Cheapernet Transceiver
• Manufacturer: AMD [Advanced Micro Devices]

8
Notes:
1.
2.
3.
4.
6.
7.
5.
PE64102/PE64107 (or equivalent)
COLL
RCV
XMT
AMD
C
D2 can be eliminated in Cheapernet (IEEE 802.3, 10BASE2) applications.
Shown with SQE Test disabled.
Discrete Power Supply or Hybrid-Hybrid DC-DC Converter Manufacturers include:
The capacitance of C3, Am7996 package, D3 and the printed circuit board should add up to 180 pF
The capacitance of C1, Am7996 package and the printed circuit board should add up to 39 pF.
R9, R10 and C4 are for Receive Mode Collision detection only.
L
is the effective load capacitance across R6; C
Ethernet (IEEE 802.3, 10BASE5)
Reliability: 2E12R9
Valor Electronics: PM1001
Cheapernet (IEEE 802.3, 10BASE2)
Reliability Inc: 2VP5U9
Valor Electronics: PM7102
Power (DTE)
(75 H)
Figure 3. Am7996 External Component Diagram with Collision Threshold Modified
1:1
1:1
1:1
MAU Power Supply
(Note 4)
40.2
40.2
1%
1%
R2
R1
–9 V
GND
for Receive Mode Collision Detect
174
1%
R3
(Note 3)
10
6
8
1
2
3
4
5
7
9
DI–
CI–
DO–
CI+
DI+
SQE^TEST
DO+
C
V CC1
VC REF
V EE
is the compensation capacitance (C
Am7996
Am7996
COLL OSC
V COL
V CC2
Shield
V TX+
V TX–
RXT
TXT
Tap
NC
NC
19
18
16
15
14
13
12
20
17
11
499
1%
R9
C4 0.1 F
1%
9.09
1%
(Note 7)
150 k
1.1 k
180 pF
R10
1%
R4
(Note 6)
(Note 1)
(Note 5)
39 pF
C L
C3
C1
C
= 1/3 C
24.9 k
1N4001
0.1 F
D3
9.09
R6
1%
C2
1%
R7
L
).
20%.
(Note 2)
C C
Connector
75 k
D2
1%
Coax
R5
(Note 1)
1N4150
D1
07506E-6