參數(shù)資料
型號: IDT72V805L15PFI8
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 3/26頁
文件大?。?/td> 0K
描述: IC FIFO SYNC 256X18 15NS 128QFP
標(biāo)準(zhǔn)包裝: 1,000
系列: 72V
功能: 異步,同步
存儲容量: 4.6K(256 x 18)
數(shù)據(jù)速率: 67MHz
訪問時間: 15ns
電源電壓: 3 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 128-LQFP
供應(yīng)商設(shè)備封裝: 128-TQFP(14x20)
包裝: 帶卷 (TR)
其它名稱: 72V805L15PFI8
IDT72V805/72V815/72V825/72V835/72V845
3.3 V CMOS DUAL SyncFIFO 256 x 18, 512 x 18, 1,024 x 18, 4,096 x 18
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
11
FEBRUARY 11, 2009
WRITE EXPANSION OUT/HALF-FULL FLAG
(
WXOA/HFA, WXOB/HFB)
This is a dual-purpose output. In the Single Device and Width Expansion
mode, when Write Expansion In (
WXIA/WXIB) and/or Read Expansion In
(
RXIA/RXIB) are grounded, this output acts as an indication of a half-full
memory.
After half of the memory is filled, and at the LOW-to-HIGH transition of
the next write cycle, the Half-Full flag goes LOW and will remain set until
the difference between the write pointer and read pointer is less than or
equal to one half of the total memory of the device. The Half-Full flag (
HFA/
HFB) is then reset to HIGH by the LOW-to-HIGH transition of the Read
Clock (RCLK). The
HF is asynchronous.
In the Daisy Chain Depth Expansion mode,
WXI is connected to WXO
of the previous device. This output acts as a signal to the next device in
the Daisy Chain by providing a pulse when the previous device writes to
the last location of memory.
READ EXPANSION OUT (
RXOA/RXOB)
In the Daisy Chain Depth Expansion configuration, Read Expansion In
(
RXIA/RXIB) is connected to Read Expansion Out (RXOA/RXOB) of the
previous device. This output acts as a signal to the next device in the Daisy
Chain by providing a pulse when the previous device reads from the last
location of memory.
DATA OUTPUTS (Q0-Q17, QB0-QB17)
Q0-Q17 are data outputs for 18-bit wide data.
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