參數(shù)資料
型號： IDT72T20118L4BBI
廠商： Integrated Device Technology, Inc.
英文描述： 2.5 VOLT HIGH-SPEED TeraSync⑩ DDR/SDR FIFO 20-BIT/10-BIT CONFIGURATION
中文描述： 2.5伏高速TeraSync⑩復(fù)員/特別提款權(quán)先進(jìn)先出20-BIT/10-BIT配置
文件頁數(shù)： 47/51頁
文件大?。?/td> 496K
代理商： IDT72T20118L4BBI
47
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
IDT72T2098/108/118/128 2.5V HIGH-SPEED TeraSync DDR/SDR FIFO 20-BIT/10-BIT CONFIGURATIONS
32K x 20/64K x 10, 64K x 20/128K x 10, 128K x 20/256K x 10, 256K x 20/512K x 10
Figure 28. Echo RCLK and Echo
REN
Operation (FWFT Mode Only)
NOTE:
1. The O/P Register is the internal output register. Its contents are available on the Qn output bus only when
RCS
and
OE
are both active, LOW, that is the bus is not in High-
Impedance state.
2.
OE
is LOW.
Cycle:
a&b.
At this point the FIFO is empty,
OR
is HIGH.
RCS
and
REN
are both disabled, the output bus is High-Impedance.
c.
Word Wn+1 falls through to the output register,
OR
goes active, LOW.
RCS
is HIGH, therefore the Qn outputs are High-Impedance.
EREN
goes LOW to indicate that a new word has been placed on the output register.
d.
EREN
goes HIGH, no new word has been placed on the output register on this cycle.
e.
No Operation.
f.
RCS
is LOW on this cycle, therefore the Qn outputs go to Low-Impedance and the contents of the output register (Wn+1) are made available.
NOTE:
In FWFT mode is important to take
RCS
active LOW at least one cycle ahead of
REN
, this ensures the word (Wn+1) currently in the output register is made
available for at least one cycle.
g.
REN
goes active LOW, this reads out the second word, Wn+2.
EREN
goes active LOW to indicate a new word has been placed into the output register.
h.
Word Wn+3 is read out,
EREN
remains active, LOW indicating a new word has been read out.
NOTE:
Wn+3 is the last word in the FIFO.
i.
This is the next enabled read after the last word, Wn+3 has been read out.
OR
flag goes HIGH and
EREN
goes HIGH to indicate that there is no new word available.
3.
OE
is LOW.
4. The truth table for
EREN
is shown below:
Qn
O/P
Reg.
t
A
t
REF
OR
5996 drw31
t
RCSLZ
REN
t
ENS
t
ENH
RCS
t
ENS
RCLK
a
b
c
d
e
f
g
h
i
W
n+1
WCLK
WEN
D0 - Dn
t
SKEW1
t
ENS
t
DS
t
ENH
W
n+2
W
n+3
ERCLK
EREN
t
CLKEN
t
CLKEN
t
CLKEN
t
CLKEN
W
n+1
W
n+2
W
n+3
t
A
t
REF
W
n+1
W
n+2
W
n+3
t
A
W
n
Last Word
t
A
t
A
t
DH
t
DH
t
DH
t
DS
t
DS
1
2
t
ERCLK
HIGH-Z
RCLK
↑
↑
↑
↑
↑
OR
RCS
REN
EREN
0
0
0
0
1
0
0
1
1
X
0
1
0
1
X
0
1
1
1
1
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IDT72T20118L5BB 功能描述:IC FIFO 65536X20 5NS 208BGA RoHS:否 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:72T 標(biāo)準(zhǔn)包裝:15 系列:74F 功能:異步 存儲容量:256（64 x 4） 數(shù)據(jù)速率:- 訪問時(shí)間:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:24-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:24-PDIP 包裝:管件 其它名稱:74F433
IDT72T20118L6-7BB 功能描述:IC FIFO 65536X20 6-7NS 208BGA RoHS:否 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:72T 標(biāo)準(zhǔn)包裝:15 系列:74F 功能:異步 存儲容量:256（64 x 4） 數(shù)據(jù)速率:- 訪問時(shí)間:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:24-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:24-PDIP 包裝:管件 其它名稱:74F433
IDT72T20128L10BB 功能描述:IC FIFO 1KX20 2.5V 10NS 208BGA RoHS:否 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:72T 標(biāo)準(zhǔn)包裝:15 系列:74F 功能:異步 存儲容量:256（64 x 4） 數(shù)據(jù)速率:- 訪問時(shí)間:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:24-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:24-PDIP 包裝:管件 其它名稱:74F433
IDT72T20128L4BB 功能描述:IC FIFO 1KX20 2.5V 4NS 208BGA RoHS:否 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:72T 標(biāo)準(zhǔn)包裝:15 系列:74F 功能:異步 存儲容量:256（64 x 4） 數(shù)據(jù)速率:- 訪問時(shí)間:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:24-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:24-PDIP 包裝:管件 其它名稱:74F433
IDT72T20128L4BBG 功能描述:IC FIFO 1KX20 2.5V 4NS 208BGA RoHS:是 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:72T 標(biāo)準(zhǔn)包裝:15 系列:74F 功能:異步 存儲容量:256（64 x 4） 數(shù)據(jù)速率:- 訪問時(shí)間:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:24-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:24-PDIP 包裝:管件 其它名稱:74F433
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