
KS8999
Micrel
KS8999
8
January 2005
Pin Number
Pin Name
Type(Note 1)
Port
Pin Function
35
GND-ISO
GND
Analog ground
36
VDD_TX
Pwr
2.0V for transmit circuitry
37
VDD_TX
Pwr
2.0V for transmit circuitry
38
GND_TX
GND
Ground for transmit circuitry
39
QL[2]
Opd
Factory test pin – leave open for normal operation
40
QL[3]
Opd
Factory test pin – leave open for normal operation
41
QL[4]
Opd
Factory test pin – leave open for normal operation
42
QL[5]
Opd
Factory test pin – leave open for normal operation
43
TXP[6]
O
6
Physical transmit signal + (differential)
44
TXM[6]
O
6
Physical transmit signal - (differential)
45
DOUT
O
Factory test output – leave open for normal operation
46
AOUT
O
Factory test output – leave open for normal operation
47
RXP[6]
I
6
Physical receive signal + (differential)
48
RXM[6]
I
6
Physical receive signal - (differential)
49
VDD_RX
Pwr
2.0V for equalizer
50
GND_RX
GND
Ground for equalizer
51
GND_RX
GND
Ground for equalizer
52
VDD_RX
Pwr
2.0V for equalizer
53
GND-ISO
GND
Analog ground
54
RXP[7]
I
7
Physical receive signal + (differential)
55
RXM[7]
I
7
Physical receive signal - (differential)
56
GND_TX
GND
Ground for transmit circuitry
57
TXP[7]
O
7
Physical transmit signal + (differential)
58
TXM[7]
O
7
Physical transmit signal - (differential)
59
VDD_TX
Pwr
2.0V for transmit circuitry
60
VDD_TX
Pwr
2.0V for transmit circuitry
61
TXP[8]
O
8
Physical transmit signal + (differential)
62
TXM[8]
O
8
Physical transmit signal - (differential)
63
GND_TX
GND
Ground for transmit circuitry
64
RXP[8]
I
8
Physical receive signal + (differential)
65
RXM[8]
I
8
Physical receive signal - (differential)
66
GND_RX
GND
Ground for equalizer
67
VDD_RX
Pwr
2.0V for equalizer
68
FXSD[5]
Ipd
5
Fiber signal detect
69
FXSD[6]
Ipd
6
Fiber signal detect
Note 1.
Pwr = power supply
GND = ground
I = input
O = output
I/O = bi-directional
Ipu = input w/ internal pull-up
Ipd = input w/ internal pull-down
Opu = output w/ internal pull-up
Opd = output w/ internal pull-down
Ipd/O = input w/ internal pull-down during reset, output pin otherwise
Ipu/O = input w/ internal pull-up during reset, output pin otherwise