IDT72T6480 Integrated Device Technology, IDT72T6480 Datasheet - Page 19

• Manufacturer Part Number: IDT72T6480
• Description: X48 Sequential Flow-control Device Up To 1gigabit
• Manufacturer: Integrated Device Technology

MAXIMUM I/O OPERATING FREQUENCY
maximum frequency of 133MHz. There are certain configurations however, that
can increase or decrease the maximum frequency of the input and output ports.
In some configurations (e.g. x24 I/O width), the I/O speeds can run up to
TABLE 6 – IDT72T6480 MAXIMUM FREQUENCY
BASED ON 166MHz DDR SDRAM
TABLE 7 – IDT72T6480 MAXIMUM FREQUENCY
BASED ON 133MHz DDR SDRAM
IDT72T6480 2.5V, SEQUENTIAL FLOW-CONTROL DEVICE
x12, x24, x48 BIT WIDE CONFIGURATION
Configuration 1
Configuration 2
Configuration 3
Configuration 4
Configuration 5
Configuration 6
Configuration 7
Configuration 1
Configuration 2
Configuration 3
Configuration 4
Configuration 5
Configuration 6
Configuration 7
The sequential flow-control (SFC) device is designed to operate at the
50MHz
33MHz
100MHz
66MHz
50MHz
66MHz
100MHz
33MHz
25MHz
66MHz
50MHz
33MHz
50MHz
66MHz
EDC On
EDC On
Bus-Width x48
Bus-Width x48
66MHz
33MHz
133MHz
66MHz
66MHz
66MHz
133MHz
50MHz
25MHz
100MHz
50MHz
50MHz
50MHz
100MHz
EDC Off
EDC Off
EDC On
EDC On
100MHz
66MHz
166MHz
133MHz
100MHz
133MHz
166MHz
66MHz
50MHz
133MHz
100MHz
66MHz
100MHz
133MHz
Bus-Width x24
Bus-Width x24
EDC Off
EDC Off
133MHz
66MHz
166MHz
133MHz
133MHz
133MHz
166MHz
100MHz
66MHz
166MHz
100MHz
100MHz
100MHz
166MHz
166MHz
133MHz
166MHz
166MHz
166MHz
166MHz
166MHz
133MHz
100MHz
166MHz
166MHz
133MHz
166MHz
166MHz
EDC On
EDC On
19
Bus-Width x12
Bus-Width x12
166MHz. The main factors that determine the usable memory are the I/O bus-
width of the SFC, the density and number of DDR SDRAMs connected, and
whether or not EDC is used. Tables 6 and 7 lists the maximum frequency for
the input and output ports of the SFC based on the various configurations.
EDC Off
EDC Off
166MHz
166MHz
166MHz
166MHz
166MHz
166MHz
166MHz
166MHz
166MHz
166MHz
166MHz
166MHz
133MHz
133MHz
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
OCTOBER 10, 2005