pe-68531g Pulse Specialty Components, pe-68531g Datasheet - Page 4

• Manufacturer Part Number: pe-68531g
• Description: Pe-6853xg Fastpulse High Speed Transceivers
• Manufacturer: Pulse Specialty Components

Application Notes
1. The PECL termination networks shown (Thevenin 50
2. Place ter mination networks near input data pins of
3. Make all differential signal paths short and the same length to
4. For chip sets with differential SD inputs, the unused SD
5. VCC signals may be connected together at transceiver as
6. Use low inductance, ceramic SMD bypass capacitors and
FASTPULSE HIGH SPEED
LAN TRANSCEIVERS
Application Circuit
U.S.A: TEL [phone]
typical. Signal traces should be effective for 50
lines. Other suitable termination schemes may be used.
Transceiver (TD) and PHY device (SD, RD) for optimum
termination.
avoid unbalancing effects and unwanted loops.
signal can be terminated as shown.
shown. Decouple very close to transceiver.
optional ferrite inductors for optimum high frequency
decoupling.
PHY CHIPSET
SIGNAL DETECT
TRANSMIT DATA
RECEIVE DATA
EUROPE: TEL [phone]
+5 V
+5 V
SIGNAL GROUND PLANE
82
130
82
130
transmission
82
130
68
180
+5 V
) are
100 nF
4
82
130
7. Device ground pins should be directly connected to low
8. Use multi-layer PCB type with dedicated GND and VCC layers
9. Use of ground plane partitions, as indicated, is recommended
10. RJ-45 flanges should make galvanic contact to backplate
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impedance ground plane for signal return current.
for best high frequency and EMC performance. At least four
layers are recommended with outside layers for signal routing
and inner layers for supply planes.
for best EMC performance. The signal ground plane extends
back to controller from edge of transceiver. The chassis
ground plane extends to media side of board and is generally
connected directly to the backplate.
cutout. Stake posts should be soldered to chassis plane for
best EMC performance. Refer to EMC section for further EMC
considerations.
82
130
1
2
3
4
5
6
7
8
9
GND
RD+
RD-
SD+
VCC
VCC
TD-
TD+
GND
FASTPULSE
WEB: http://www.pulseeng.com
CHASSIS GROUND PLANE
BACKPLATE
H309.A (7/96)