IDT72T6480 Integrated Device Technology, IDT72T6480 Datasheet - Page 35

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

IDT72T6480 2.5V, SEQUENTIAL FLOW-CONTROL DEVICE
x12, x24, x48 BIT WIDE CONFIGURATION
Q[47:0]
D[47:0]
NOTES:
1. t
2. Settings: RCS = LOW, WCS = LOW, BM[3:0] = 1000, FWFT = LOW, ASYR = HIGH, and ASYW = HIGH.
WCLK
RCLK
WEN
not met, then EF de-assertion may be delayed one extra RCLK cycle.
REN
SKEW1
Symbol
t
t
t
t
t
t
t
t
t
t
DS
DH
ENH
A
CLK
CLKH
CLKL
ENS
REFs
SKEW1
EF
OE
NOTES:
1. t
2. Settings: OE = LOW, RCS = LOW, WCS = LOW, BM[3:0] = 1000, FWFT = HIGH, ASYR = HIGH, and ASYW = HIGH.
Q[47:0]
D[47:0]
WCLK
RCLK
WEN
If t
REN
SKEW1
is the minimum time between a rising WCLK edge and a rising RCLK edge to guarantee that EF will go HIGH after one RCLK cycle (plus t
t
ENS
OR
SKEW1
Clock Cycle Time
Clock High Time
Clock Low Time
Data Setup Time
Data Hold Time
Enable Setup Time
Enable Hold Time
Data Access Time
Read Clock to Synchronous EF/OR
Skew time between RCLK and WCLK for EF/OR and FF/IR in SDR
is the minimum time between a rising WCLK edge and a rising RCLK edge to guarantee that EF will go HIGH after one RCLK cycle (plus t
is not met, then EF de-assertion may be delayed one extra RCLK cycle.
Last Word - 3
t
ENH
t
REF
t
A
t
OE
t
A
Parameter
t
SKEW1
t
Last Word - 2
ENS
t
Word 0
DS
(1)
NO OPERATION
t
t
DH
ENH
t
A
Last Word
Figure 10. Empty Boundary - IDT Standard Mode
1
Figure 11. Empty Boundary - FWFT Mode
Last Word - 1
t
t
OHZ
t
A
t
DS
ENS
t
DS
t
ENS
Word 0
Word 1
t
SKEW1
NO OPERATION
t
t
ENH
DH
35
t
t
ENH
DH
t
REFs
2
1
(x24 or x12 I/O only) (x48 I/O width only)
t
CLKH
t
REF
Min.
2.7
2.7
0.5
0.5
—
6
2
2
1
4
t
OLZ
7-5ns
Last Word
t
CLK
Max.
—
—
—
—
—
—
—
—
4
4
t
2
CLKL
t
ENS
Last Word
Min.
7.5
3.5
3.5
2.5
0.5
2.5
0.5
—
1
5
7-5ns
t
t
ENH
REFs
t
A
t
Max.
A
3
COMMERCIAL AND INDUSTRIAL
—
—
—
—
—
—
—
—
5
5
TEMPERATURE RANGES
Min.
4.5
4.5
3.5
0.5
3.5
0.5
10
—
1
7
t
ENS
10ns
Word 0
Word 0
OCTOBER 10, 2005
REFs
Max.
6.5
6.5
6358 drw19
—
—
—
—
—
—
—
—
). If t
REFs
t
REF
t
t
ENH
A
Word 1
SKEW1
).
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
6358 drw18
is