72271LA15TF Integrated Device Technology (Idt), 72271LA15TF Datasheet - Page 22

• Manufacturer Part Number: 72271LA15TF
• Description: FIFO Mem Sync Dual Depth/Width Uni-Dir 32K x 9 64-Pin STQFP
• Manufacturer: Integrated Device Technology (Idt)

Specifications of 72271LA15TF

• Package: 64STQFP
• Configuration: Dual
• Bus Directional: Uni-Directional
• Density: 288 Kb
• Organization: 32Kx9
• Data Bus Width: 9 Bit
• Timing Type: Synchronous
• Expansion Type: Depth|Width
• Typical Operating Supply Voltage: 5 V
• Operating Temperature: 0 to 70 °C

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.
D
Q
WCLK
RCLK
NOTE:
1. OE = LOW
IDT72261LA/72271LA SuperSync FIFO™
16,384 x 9 and 32,768 x 9
WCLK
WEN
0
REN
RCLK
0
PAF
In IDT Standard mode: D = 16,384 for the IDT72261LA and 32,768 for the IDT72271LA.
In FWFT mode: D = 16,385 for the IDT72261LA and 32,769 for the IDT72271LA.
rising edge of RCLK and the rising edge of WCLK is less than t
WEN
SKEW2
- Q
REN
- D
LD
LD
7
7
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
t
CLKH
t
CLKH
PAE OFFSET
Figure 14. Parallel Loading of Programmable Flag Registers (IDT Standard and FWFT Modes)
(LSB)
DATA IN OUTPUT
t
t
CLK
Figure 15. Parallel Read of Programmable Flag Registers (IDT Standard and FWFT Modes)
ENS
t
t
ENS
CLK
t
REGISTER
t
LDS
DS
Figure 16. Programmable Almost-Full Flag Timing (IDT Standard and FWFT Modes)
t
t
CLKL
t
ENS
LDS
t
CLKL
D - (m+1) words in FIFO
t
CLKL
t
ENH
PAE OFFSET
t
t
t
ENH
DH
LDH
t
LDH
t
t
ENH
A
(MSB)
1
(2)
SKEW2
, then the PAF deassertion time may be delayed one extra WCLK cycle.
PAE OFFSET
(LSB)
PAF OFFSET
2
(LSB)
22
t
PAF
t
ENS
t
SKEW2
PAE OFFSET
(MSB)
(3)
PAF OFFSET
(MSB)
t
ENH
D - m words in FIFO
1
t
t
LDH
ENH
PAF OFFSET
COMMERCIAL AND INDUSTRIAL
t
DH
(LSB)
(2)
t
t
ENH
LDH
t
A
TEMPERATURE RANGES
PAF
2
). If the time between the
t
PAF
JANUARY 7, 2009
PAF OFFSET
D-(m+1) words
in FIFO
4671 drw 19
(MSB)
4671 drw 17
4671 drw 18
(2)