STANDARD PRODUCT
PM4351 COMET
DATA SHEET
PMC-1970624
ISSUE 10
COMBINED E1/T1 TRANSCEIVER
Table 9
- Power and Ground (25 pins)
Pin Name
Type
Pin No.
-RI -NI
D2
Function
VDDO1
VDDO2
VDDO3
VSSO1
VSSO2
VSSO3
VDDI1
VDDI2
VSSI1
VSSI2
BIAS
Power
53
8
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.
E6
G4
D4
E7
J5
30
52
9
Ground
Output Ground Pins (VSSO[3:1]). The output ground pins should be
connected to GND in common with VSSI.
31
48
14
47
15
46
Power
Ground
Input
F2
F8
G1
F9
G8
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.
Internal Ground Pins (VSSI[2:1]). The internal ground pins should be
connected to GND in common with VSSO.
+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
TAVS1
Analog
Power
71
2
A5
B2
Transmit Analog Power (TAVD4). TAVD4 supplies power for the transmit clock
synthesis unit. TAVD4 should be connected to analog +3.3 V.
Analog
Ground
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
RAVD1
RAVD2
RAVS1
Analog
Ground
70
61
65
62
C6
A9
A7
B8
Transmit Analog Ground (TAVS4). TAVS supplies ground for the transmit clock
synthesis unit. TAVS4 should be connected to analog GND.
Analog
Power
Receive Analog Power (RAVD1). RAVD1 supplies power for the receive LIU
input equalizer. RAVD1 should be connected to analog +3.3 V.
Analog
Power
Receive Analog Power (RAVD2). RAVD2 supplies power for the receive LIU
peak detect and slicer. RAVD2 should be connected to analog +3.3 V.
Analog
Ground
Receive Analog Ground (RAVS1). RAVS1 supplies power for the receive LIU
input equalizer. RAVS1 should be connected to analog GND.
PROPRIETARY AND CONFIDENTIAL
28
PMC [ PMC-SIERRA, INC ]
