72T18105L5BBGI Integrated Device Technology (Idt), 72T18105L5BBGI Datasheet - Page 46

• Manufacturer Part Number: 72T18105L5BBGI
• Description: FIFO Mem Async/Sync Dual Depth/Width Uni-Dir 128K x 18/256K x 9 240-Pin BGA
• Manufacturer: Integrated Device Technology (Idt)

Specifications of 72T18105L5BBGI

• Package: 240BGA
• Configuration: Dual
• Bus Directional: Uni-Directional
• Density: 2.25 Mb
• Organization: 128Kx18|256Kx9
• Data Bus Width: 9/18 Bit
• Timing Type: Asynchronous|Synchronous
• Expansion Type: Depth|Width
• Typical Operating Supply Voltage: 2.5 V
• Operating Temperature: -40 to 85 °C

NOTES:
1. n = PAE offset.
2. For IDT Standard Mode.
3. For FWFT Mode.
4. PAE is asserted LOW on RCLK transition and reset to HIGH on WCLK transition.
5. Select this mode by setting PFM LOW during Master Reset.
6. RCS = LOW.
NOTES:
1. m = PAF offset.
2. D = maximum FIFO depth.
3. PAF is asserted to LOW on WCLK transition and reset to HIGH on RCLK transition.
4. Select this mode by setting PFM LOW during Master Reset.
5. RCS is LOW.
IDT72T1845/55/65/75/85/95/105/115/125 2.5V TeraSync™ 18-BIT/9-BIT FIFO
8Kx9, 8Kx18/16Kx9, 16Kx18/32Kx9, 32Kx18/64Kx9, 64Kx18/128Kx9, 128Kx18/256Kx9, 256Kx18/512Kx9, 512Kx18/1Mx9
RCLK
RCLK
WCLK
WCLK
WEN
WEN
In IDT Standard mode: if x18 Input or x18 Output bus Width is selected, D = 2,048 for the IDT72T1845, 4,096 for the IDT72T1855, 8,192 for the IDT72T1865, 16,384 for the IDT72T1875,
32,768 for the IDT72T1885, 65,536 for the IDT72T1895, 131,072 for the IDT72T18105, 262,144 for the IDT72T18115 and 524,288 for the IDT72T18125. If both x9 Input and x9
Output bus Widths are selected, D = 4,096 for the IDT72T1845, 8,192 for the IDT72T1855, 16,384 for the IDT72T1865, 32,768 for the IDT72T1875, 65,536 for the IDT72T1885,
131,072 for the IDT72T1895, 262,144 for the IDT72T18105, 524,288 for the IDT72T18115 and 1,048,576 for the IDT72T18125.
In FWFT mode: if x18 Input or x18 Output bus Width is selected, D = 2,049 for the IDT72T1845, 4,097 for the IDT72T1855, 8,193 for the IDT72T1865, 16,385 for the IDT72T1875,
32,769 for the IDT72T1885, 65,537 for the IDT72T1895, 131,073 for the IDT72T18105, 262,145 for the IDT72T18115 and 524,289 for the IDT72T18125. If both x9 Input and x9
Output bus Widths are selected, D = 4,097 for the IDT72T1845, 8,193 for the IDT72T1855, 16,385 for the IDT72T1865, 32,769 for the IDT72T1875, 65,537 for the IDT72T1885,
131,073 for the IDT72T1895, 262,145 for the IDT72T18105, 524,289 for the IDT72T18115 and 1,048,577 for the IDT72T18125.
REN
REN
PAF
PAE
Figure 26. Asynchronous Programmable Almost-Empty Flag Timing (IDT Standard and FWFT Modes)
Figure 25. Asynchronous Programmable Almost-Full Flag Timing (IDT Standard and FWFT Modes)
D - (m + 1) words in FIFO
n + 1 words in FIFO
n words in FIFO
t
t
CLKH
CLKH
(2)
(3)
,
t
t
ENS
ENS
t
t
CLKL
CLKL
46
t
ENH
t
t
t
PAEA
ENH
PAFA
t
ENS
2Kx18/4Kx9, 4Kx18/
t
ENS
n + 1 words in FIFO
n + 2 words in FIFO
D - m words
in FIFO
t
t
PAEA
PAFA
(2)
(3)
,
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
n + 1 words in FIFO
D - (m + 1) words
n words in FIFO
FEBRUARY 10, 2009
in FIFO
5909 drw30
(2)
5909 drw29
,
(3)