STANDARD PRODUCT
PM4351 COMET
DATA SHEET
PMC-1970624
ISSUE 10
COMBINED E1/T1 TRANSCEIVER
PROPRIETARY AND CONFIDENTIAL
28
Table 9
- Power and Ground (25 pins)
Pin No.
Pin Name
Type
-RI
-NI
Function
VDDO1
VDDO2
VDDO3
Power
53
8
30
D2
E6
G4
Output Power Pins (VDDO[3:1]). The output power pins should be connected
to a well-decoupled +3.3 V DC supply in common with VDDI.
VSSO1
VSSO2
VSSO3
Ground
52
9
31
D4
E7
J5
Output Ground Pins (VSSO[3:1]).
The output ground pins should be
connected to GND in common with VSSI.
VDDI1
VDDI2
Power
48
14
F2
F8
Internal Power Pins (VDDI[2:1]).
The internal power pins should be connected
to a well-decoupled +3.3 V DC supply in common with VDDO.
VSSI1
VSSI2
Ground
47
15
G1
F9
Internal Ground Pins (VSSI[2:1]).
The internal ground pins should be
connected to GND in common with VSSO.
BIAS
Input
46
G8
+5 V Bias (BIAS). The BIAS input facilitates 5 V tolerance on the inputs. BIAS
must be connected to a well-decoupled +5 V rail if 5 V tolerant inputs are
required. If 5 V tolerant inputs are not required, BIAS must be connected to a
well-decoupled 3.3 V DC supply together with the power pins VDDO[3:1] and
VDDI[3:1].
TAVD1
Analog
Power
1
A1
Transmit Analog Power (TAVD1). TAVD1 provides power for the transmit LIU
reference circuitry. TAVD1 should be connected to analog +3.3 V.
TAVD2
TAVD3
Analog
Power
74
77
B4
B5
Transmit Analog Power (TAVD2, TAVD3). TAVD2 and TAVD3 supply power for
the transmit LIU output drivers. TAVD2 and TAVD3 should be connected to
analog +3.3 V.
TAVD4
Analog
Power
71
A5
Transmit Analog Power (TAVD4). TAVD4 supplies power for the transmit clock
synthesis unit. TAVD4 should be connected to analog +3.3 V.
TAVS1
Analog
Ground
2
B2
Transmit Analog Ground (TAVS1). TAVS1 provides ground for the transmit LIU
reference circuitry. TAVS1 should be connected to analog GND.
TAVS2
TAVS3
Analog
Ground
75
78
A3
B3
Transmit Analog Ground (TAVS2A, TAVD2B). TAVS2A and TAVS2B supply
ground for the transmit LIU output drivers. TAVS2A and TAVS2B should be
connected to analog GND.
TAVS4
Analog
Ground
70
C6
Transmit Analog Ground (TAVS4). TAVS supplies ground for the transmit clock
synthesis unit. TAVS4 should be connected to analog GND.
RAVD1
Analog
Power
61
A9
Receive Analog Power (RAVD1). RAVD1 supplies power for the receive LIU
input equalizer. RAVD1 should be connected to analog +3.3 V.
RAVD2
Analog
Power
65
A7
Receive Analog Power (RAVD2). RAVD2 supplies power for the receive LIU
peak detect and slicer. RAVD2 should be connected to analog +3.3 V.
RAVS1
Analog
Ground
62
B8
Receive Analog Ground (RAVS1). RAVS1 supplies power for the receive LIU
input equalizer. RAVS1 should be connected to analog GND.