KS8993
Micrel
Pin Description
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
Note 1.
Pin Name
GND_ANA
MUX[2]
MUX[1]
GND_RX[1]
RXP[1]
RXM[1]
VDD_RX[1]
VREF[1]
TXP[1]
TXM[1]
GND_TX[1]
VDD_TX[1]
VDD_BG
ISET
GND_BG
GND_PLL
VDD_PLL
GND_RX[2]
RXP[2]
RXM[2]
VDD_RX[2]
VREF[2]
TXP[2]
TXM[2]
GND_TX[2]
VDD_TX[2]
VDD_TX[3]
GND_TX[3]
TXP[3]
TXM[3]
VREF[3]
VDD_RX[3]
RXP[3]
RXM[3]
GND_RX[3]
FXSD[2]
FXSD[3]
GND_ANA
Type
(Note 1)
GND
I
I
GND
I
I
Pwr
O
O
O
GND
Pwr
Pwr
O
GND
GND
Pwr
GND
I
I
Pwr
O
O
O
GND
Pwr
Pwr
GND
O
O
O
Pwr
I
I
GND
I
I
GND
Port
Pin Function
Analog ground
Factory test pin
Factory test pin
1
1
1
1
1
1
1
1
1
Ground for receiver
Physical receive signal + (differential)
Physical receive signal - (differential)
2.5V for receiver
Reference voltage for transmit transformer center tap
Physical transmit signal + (differential)
Physical transmit signal - (differential)
Ground for transmit circuitry
2.5V for transmit circuitry
2.5V for analog circuitry
Set physical transmit output current
Ground for analog circuitry
Ground for phase locked loop circuitry
2.5V for phase locked loop circuitry
2
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
2
3
Ground for receiver
Physical receive signal + (differential)
Physical receive signal - (differential)
2.5V for receiver
Reference voltage for transmit transformer center tap
Physical transmit signal + (differential)
Physical transmit signal - (differential)
Ground for transmit circuitry
2.5V for transmit circuitry
2.5V for transmit circuitry
Ground for transmit circuitry
Physical transmit signal + (differential)
Physical transmit signal - (differential)
Reference voltage for transmit transformer center tap
2.5V for receiver
Physical receive signal + (differential)
Physical receive signal - (differential)
Ground for receiver
Fiber signal detect
Fiber signal detect
Analog ground
Pwr = power supply
GND = ground
I = input
O = output
I/O = bi-directional
KS8993
6
April 2009
MICREL [ MICREL SEMICONDUCTOR ]
