CS8952-CQ Cirrus Logic Inc, CS8952-CQ Datasheet - Page 64

• Manufacturer Part Number: CS8952-CQ
• Description: IC ETHNT 10/100 TXRX 5V 100-TQFP
• Manufacturer: Cirrus Logic Inc
• Type: Transceiverr

Specifications of CS8952-CQ

• Mounting Type: Surface Mount
• Protocol: MII
• Voltage - Supply: 4.75 V ~ 5.25 V
• Package / Case: 100-TQFP, 100-VQFP
• Peak Reflow Compatible (260 C): No
• Supply Voltage: 5V
• Supply Voltage Max: 5V
• Transceiver Type: Ethernet
• Leaded Process Compatible: No
• No. Of Drivers: 6
• Interface Type: MII
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Number Of Drivers/receivers: -
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant, Contains lead / RoHS non-compliant
• Other names: 598-1205

TX_NRZ+/- termination components should be
placed as close to the fiber transceiver as possible,
while RX_NRZ+/- and SIGNAL+/- termination
components should be placed close to the CS8952.
The CS8952 100BASE-FX interface IO pins
(TX_NRZ+, TX_NRZ-, RX_NRZ+, RX_NRZ-,
SIGNAL+, and SIGNAL-) may be left unconnect-
ed if a fiber interface is not used.
7.3
A 4.99 k biasing resistor must be connected be-
tween the CS8952 RES pin and ground. This resis-
64
Internal Voltage Reference
CS8952
RX_NRZ+
TX_NRZ+
RX_NRZ-
SIGNAL+
TX_NRZ-
SIGNAL-
8
9
4
5
6
7
191
130
68
82
Figure 7. Recommended Connection of Fiber Port
+5
+5
82
130
82
130
0.1 µF
49.9
+5
63.4
49.9
CrystalLAN™ 100BASE-X and 10BASE-T Transceiver
tor biases the internal analog circuits of the CS8952
and should be placed as close as possible to RES
pin. Connect the other end of this resistor directly
to the ground plane. Connect the adjacent CS8952
ground pins (pins 85 and 87) to the grounded end of
the resistor forming a “shield” around the RES con-
nection.
7.4
The CS8952 may be clocked using one of three
possible schemes: using a 25 MHz crystal and the
internal oscillator, using an external oscillator sup-
+5
0.1 µF
0.1 µF 0.1 µF
Clocking Schemes
Ferrite Bead
Ferrite Bead
1 µH
1 µH
0.1 µF
4
5
6
7
8
3
2
1
9
RxV
TxV
TD-
TD+
RxV
TxV
RD-
RD+
SD
FIBER TRANS.
HFBR-5103
CC
CC
EE
EE
CS8952