參數(shù)資料
型號(hào): IDT72271L12GB
廠商: Integrated Device Technology, Inc.
英文描述: CMOS SUPERSYNC FIFOO 16,384 x 9, 32,768 x 9
中文描述: 的CMOS SUPERSYNC FIFOO 16,384 × 9,32768 × 9
文件頁數(shù): 24/30頁
文件大?。?/td> 388K
代理商: IDT72271L12GB
24
MILITARY AND COMMERCIAL TEMPERATURE RANGES
IDT72261/72271 SyncFIFO
16,384 x 9, 32,768 x 9
t
REF
t
RTS
t
ENH
W
x
t
DH
t
RTS
W
[y+1]
t
ENS
t
ENH
t
RTF1
3036 drw 20
t
A
t
ENS
(1,2)
t
ENS
W
y
WCLK
WEN
RCLK
REN
D
0
- D
8
RT
EF
PAF
HF
PAE
FF
Q
0
- Q
8
t
ENH
W
[x + 1]
t
SKEW2
1
2
3
2
1
t
ENS
t
DS
W
1
t
PAF
t
HF
t
PAE
t
A
t
ENH
t
ENS
t
DS
t
DH
t
ENH
t
REF
(3)
(4)
NOTES:
1. t
RTF1
contributes a variable delay to the overall retransmit recovery time:
t
RFTF1
max = 14*T
f
+ 3*T
RCLK
(in ns)
Where T
f
is either the RCLK or the WCLK period, whichever is shorter, and T
RCLK
is the RCLK period.
2. Retransmit Setup is complete after
EF
returns HIGH, only then can a read operation begin. Write operations are permitted after one of two conditions have
been met:
EF
is HIGH or 14 cycles of the faster clock (RCLK or WCLK) have elapsed since the RCLK rising edge enabled by the
RT
pulse.
3. Following Retransmit Setup, the rising edge of RCLK that accesses the first memory location also initiates the updating of
HF
,
PAE
, and
PAF
.
4. No more than D - 2 words (D = 16,384 words for the 72261, 32,768 words for the 72271) should have been written to the FIFO between Reset (Master
or Partial) and Retransmit Setup. Therefore,
FF
will be HIGH throughout the Retransmit Setup procedure.
5.
OE
= LOW
Figure 17. Retransmit Timing (IDT Standard mode)
相關(guān)PDF資料
PDF描述
IDT72271L12PF CMOS SUPERSYNC FIFOO 16,384 x 9, 32,768 x 9
IDT72271L12PFB CMOS SUPERSYNC FIFOO 16,384 x 9, 32,768 x 9
IDT72271L12TF CMOS SUPERSYNC FIFOO 16,384 x 9, 32,768 x 9
IDT72271L15G CMOS SUPERSYNC FIFOO 16,384 x 9, 32,768 x 9
IDT72271L15GB CMOS SUPERSYNC FIFOO 16,384 x 9, 32,768 x 9
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