am7996 Advanced Micro Devices, am7996 Datasheet - Page 8

• Manufacturer Part Number: am7996
• Description: Ieee 802.3/ethernet/cheapernet Transceiver
• Manufacturer: 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 20%.
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
).
(Note 2)
C C
Connector
75 k
D2
1%
Coax
R5
(Note 1)
1N4150
D1
07506E-6