PM4341AT1XC
DATA SHEET
PMC-900602
ISSUE 7
T1 FRAMER/TRANSCEIVER
Pin
Pin No.
Name
Type
PQFP PLCC Function
VDDI[0]
VDDI[1]
Power 11
49
19
51
Core power pins (VDDI[1:0]).These pins
must be connected to a common, well
decoupled +5 VDC supply together with
the VDDO[2:0] pins.
VSSO[0]
VSSO[1]
VSSO[2]
VSSO[3]
Ground 70
1
Pad ring ground pins (VSSO[3:0]).These
pins must be connected to a common
ground together with the VSSI[1:0] pins.
Care must be taken to avoid coupling
noise induced on the VSSO pins into the
VSSI pins.
9
17
43
60
38
58
VSSI[0]
VSSI[1]
Ground 10
50
18
52
Core ground pins (VSSI[1:0]).These pins
must be connected to a common ground
together with the VSSO[2:0] pins.
Notes on Pin Description:
1. VDDI and VSSI are the +5 V and ground connections, respectively, for the
core circuitry of the device. VDDO and VSSO are the +5 V and ground
connections, respectively, for the pad ring circuitry of the device. TAVD and
TAVS are the +5V and ground connections, respectively, for the transmit
analog circuitry of the device. These power supply connections must all be
utilized and must all connect to a common +5 V or ground rail, as appropriate.
There is no low impedance connection within the PM4341A between the
core, pad ring, and transmit analog supply rails. Failure to properly make
these connections may result in improper operation or damage to the device.
Care must be taken to avoid coupling of noise into the transmit analog supply
rails.
2. RAVD and RAVS are the +5 V and ground connections, respectively, for the
receive analog circuitry of the device. These power supply connections need
only be used if the receive analog function is desired and should then
connect to a common +5 V or ground rail, as appropriate, with the core, pad
ring, and transmit analog supply rails. There is no low impedance connection
within the PM4341A between the receive analog supply rail and other supply
rails. When the receive analog function is not desired, RAVD should be
connected to RAVS. Care must be taken to avoid coupling of noise into the
receive analog supply rails.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
33
PMC [ PMC-SIERRA, INC ]
