72235LB15PF IDT, 72235LB15PF Datasheet - Page 12

• Manufacturer Part Number: 72235LB15PF
• Description: FIFO
• Manufacturer: IDT

Specifications of 72235LB15PF

• Part # Aliases: IDT72235LB15PF

NOTES:
1. m = PAF offset. D = maximum FIFO Depth. Number of data words written into FIFO memory = 256 - m + 1 for the IDT72205LB, 512 - m + 1 for the IDT72215LB,
2. 256 - m words for the IDT72205LB, 512 - m words for the IDT72215LB, 1,024 - m words for the IDT72225LB, 2,048 - m words for the IDT72235LB and 4,096 - m words for
NOTES:
1. D = maximum FIFO Depth = 256 words for the IDT72205LB, 512 words for the IDT72215LB, 1,024 words for the IDT72225LB, 2,048 words for the IDT72235LB and 4,096 words
NOTE:
1. n = PAE offset. Number of data words written into FIFO already = n.
IDT72205LB/72215LB/72225LB/72235LB/72245LB CMOS SyncFIFO
256 x 18, 512 x 18, 1,024 x 18, 2,048 x 18 and 4,096 x 18
WCLK
WCLK
RCLK
RCLK
WCLK
1,024 - m + 1 for the IDT72225LB, 2,048 - (m + 1) for the IDT72235LB and 4,096 - (m + 1) for the IDT72245LB.
the IDT72245LB.
for the IDT72245LB.
RCLK
D – m + 1 words in FIFO memory
D/2 words in FIFO memory
Figure 12. Programmable Almost-Empty Flag Timing
Figure 13. Programmable Almost-Full Flag Timing
t
t
CLKH
t
CLKH
CLKH
Figure 14. Half-Full Flag Timing
t
t
t
ENS
ENS
ENS
t
(1)
t
CLKL
t
CLKL
CLKL
(1)
(1)
12
TM
t
ENH
t
t
t
ENH
PAE
t
ENH
t
PAF
HF
t
ENS
t
t
ENS
ENS
n + 1 words in FIFO
in FIFO memory
D/2 + 1 words in
FIFO memory
D – m words
t
PAE
t
t
PAF
HF
(2)
COMMERCIAL AND INDUSTRIAL
(2)
TEMPERATURE RANGES
D – m + 1 words
in FIFO memory
n words in FIFO
FIFO memory
D/2 words in
MARCH 2013
2766 drw 14
2766 drw 16
2766 drw 15
(1)
(1)