IDT72255LA15PFG IDT, Integrated Device Technology Inc, IDT72255LA15PFG Datasheet - Page 22

• Manufacturer Part Number: IDT72255LA15PFG
• Description: IC FIFO SUPERSYNC 8KX18 64QFP
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: 7200r

Specifications of IDT72255LA15PFG

• Function: Synchronous
• Memory Size: 144K (8K x 18)
• Access Time: 15ns
• Voltage - Supply: 4 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 64-TQFP, 64-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Rate: -
• Other names: 72255LA15PFG; 800-1500

NOTE:
1. OE = LOW
NOTES:
1. m = PAF offset.
2. D = maximum FIFO depth.
3. t
4. PAF is asserted and updated on the rising edge of WCLK only.
IDT72255LA/72265LA CMOS SuperSync FIFO™
8,192 x 18 and 16,384 x 18
D
Q
WCLK
RCLK
In IDT Standard mode: D = 8,192 for the IDT72255LA and 16,384 for the IDT72265LA.
In FWFT mode: D = 8,193 for the IDT72255LA and 16,385 for the IDT72265LA.
rising edge of RCLK and the rising edge of WCLK is less than t
0
0
WCLK
SKEW2
RCLK
- D
- Q
15
15
is the minimum time between a rising RCLK edge and a rising WCLK edge to guarantee that PAF will go HIGH (after one WCLK cycle plus t
t
CLKH
Figure 14. Parallel Loading of Programmable Flag Registers (IDT Standard and FWFT Modes)
Figure 15. Parallel Read of Programmable Flag Registers (IDT Standard and FWFT Modes)
t
ENS
Figure 16. Programmable Almost-Full Flag Timing (IDT Standard and FWFT Modes)
D - (m+1) words in FIFO
t
CLKL
t
ENH
DATA IN OUTPUT
t
CLKH
REGISTER
t
CLKH
1
(2)
t
SKEW2
CLK
t
CLK
t
, then the PAF deassertion time may be delayed one extra WCLK cycle.
t
ENS
LDS
t
t
CLKL
DS
t
ENS
t
LDS
t
CLKL
OFFSET
PAE
2
22
t
PAF
t
t
t
ENH
DH
LDH
t
LDH
t
t
ENH
A
t
ENS
t
SKEW2
(3)
OFFSET
PAF
t
ENH
D - m words in FIFO
OFFSET
PAE
t
DH
t
1
t
ENH
LDH
t
t
ENH
LDH
t
A
COMMERCIAL AND INDUSTRIAL
(2)
TEMPERATURE RANGES
PAF
). If the time between the
2
JANUARY 13, 2009
t
PAF
OFFSET
PAF
D-(m+1) words
in FIFO
4670 drw 17
4670 drw 19
4670 drw 18
( 2)