RPIXP2850BB Intel, RPIXP2850BB Datasheet - Page 87

• Manufacturer Part Number: RPIXP2850BB
• Manufacturer: Intel

Specifications of RPIXP2850BB

• Operating Supply Voltage (typ): 1.3/1.5/2.5/3.3V
• Operating Supply Voltage (max): 1.575/2.7/3.465V
• Operating Supply Voltage (min): 1.235/2.3/3.135V
• Mounting: Surface Mount
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Lead Free Status / Rohs Status: Not Compliant

Figure 50.
Figure 51.
Hardware Design Guide
Trace Length from IXP28XX Network Processor to SRAM (C, K, SA, D, and R/W_BW)
Trace Length from SRAM to IXP28XX Network Processor (Q Data)
In
eL# is the effective length of internal etch. Effective length must be considered since the signals
propagate faster in the package than on the PCB, due to the materials used in each. The QDRII
SRAM internal package length need not be considered, because the package is internally matched
by length.
Each channel is independent; therefore, only one channel needs to be considered at a time. Ideally,
the rising edge of the CIN clock is coincident with the rising edge of Q data, i.e., the loopback
clock should arrive at the network processor die at the same time as the Q data, even though they
follow different paths.
In the case of the loopback clock, only the C clock length from the IXP28XX network processor to
SRAM and the Q data length from SRAM to the network processor need to be considered. It is
assumed that the total C and C_N etch lengths are identical. In practice, they may vary by a mil or
Figure 50
and
Figure 51
Network Processor
Network Processor
Internal Package
Internal Package
Die
Die
Intel
Intel
L# is the length of etch on the printed circuit board (PCB). The label,
Length
Length
®
®
IXP2800
IXP2800
eL6
eL1
L5
L2
IXP28XX Network Processor
L4
L4
L3
L3
SRAM1
SRAM1
SRAM1
SRAM1
QDR-II
QDR-II
QDR-II
QDR-II
QDR SRAM
3362-01
3361-01
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