EQCO875SC.3 Datasheet, PDF (4/20 Pages) Microchip Technology – EQCO875SC.3/EQCO850SC.3 Single-Coax Transceiver for Fast Ethernet

EQCO875SC.3/EQCO850SC.3
FIGURE 1-2:
EQCO875SC.3 PIN DIAGRAM (VIEWED FROM TOP)⁽¹⁾
CCUT DVCC OPT0 DGND
16
15
14
13
AVCC 1
12 SDOp
SDIO 2
11 SDOn
REF 3 ^EQCO875SC.3 10 SDIp
AGND 4
GND TAB
9 SDIn
5
6
7
8
OPT1 CLK DAT NC
Note 1: Devices named EQCO850SC.2 can be used for all applications contained in this data sheet. They are the
same in all aspects.
TABLE 1-1: EQCO875SC.3 PIN DESCRIPTIONS
Pin Number
Pin Name
Signal Type
Description
(TAB)
15
13
1
4
2
3
8
10, 9
12, 11
14, 5
6, 7
16
GND
DVCC
DGND
AVCC
AGND
SDIO
REF
NC
SDIp/SDIn
SDOp/SDOn
OPT0, OPT1
CLK, DAT
CCUT
Power
Power
Power
Power
Power
Bidirectional
Bidirectional
Output
Input
Output
Input
Input
Analog
Connect to ground of power supply.
Digital VCC. Connect to +3.3V of power supply.
Digital GND. Connect to ground of power supply.
Analog VCC.
Connect to +3.3V of power supply via ferrite bead (RF choke)
and capacitor to cable outer screen.
Analog GND.
Connect to cable outer screen.
Serial Input/Output.
Connect to center conductor of 75Ω coax cable.
Reference. Connect through 75Ω resistor (or impedance
matched to cable) to cable outer screen.
Do not connect.
Positive/negative differential serial input.
Connect to the Ethernet PHY FX Out pins.
Positive/negative differential serial output.
Connect to the Ethernet PHY FX In pins.
Connect Opt0 to DGND and Opt1 to DVCC to enable Fast
Ethernet mode.
Used for production test. Connect to DGND.
Connect to DVCC.
DS60001314A-page 4
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