RPIXP2850BB Intel, RPIXP2850BB Datasheet - Page 72

• 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

IXP28XX Network Processor
QDR SRAM
Figure 34.
Table 25.
72
QDR K and K# Routing Topology
Table 25
QDR K and K# Signal Group Routing Guidelines
1.
Figure 35
Signal Group
Topology
Reference Plane
Characteristic Trace Impedance
RTT
Nominal Trace Width
Nominal Trace Separation
Group spacing
Trace length P
Trace length B
Maximum via count per signal
Length tuning method
P refers to the package length.
K-Clock Signals K, K#
provides routing guidelines for the QDR K and K# signal groups.
IXP2800 QDR Driver
illustrates routing for QDR K and K# signal trace width/spacing.
1
K, K# Clks
Parameter
+A to SRAMs
Intel
®
R
A
TT
= 50
V
K, K#
Point-to-Point
Ground
50 Ω ±10%
50 Ω ±1%
5 mils
20 mils
Isolation from all other signals is 20 - 25 mils
Trace length from ball to ball should be within 25 mils for all K,
K# nets.
As short as possible.
Maximum = 1.0 inches
As short as possible.
Maximum = 6 vias
K and K# signals matched within ±25 mils to (Data-Out + 0.5
in.), (Address + 0.9 in.), and (Control + 0.5 in.) signals, where
length includes package length compensation (P+A)
TT
= 0.75V
Routing Guideline
Hardware Design Guide
Top SRAM
ottom SRAM
3956-01