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參數(shù)資料
型號: LC4256B-3F256AC
文件頁數(shù): 18/57頁
文件大小: 1078K
代理商: LC4256B-3F256AC
Lattice Semiconductor
ispMACH 4000V/B/C Family Data Sheet
18
ispMACH 4000V/B/C External Switching Characteristics
Over Recommended Operating Conditions
Parameter
Description
1, 2, 3
-25
-27
-3
-35
Units
ns
Min.
Max.
2.5
Min.
Max.
2.7
Min.
Max.
3.0
Min.
Max.
3.5
t
PD
5-PT bypass combinatorial propagation
delay
20-PT combinatorial propagation delay
through macrocell
GLB register setup time before clock
GLB register setup time before clock
with T-type register
GLB register setup time before clock,
input register path
GLB register setup time before clock
with zero hold
GLB register hold time after clock
GLB register hold time after clock with
T-type register
GLB register hold time after clock, input
register path
GLB register hold time after clock, input
register path with zero hold
GLB register clock-to-output delay
External reset pin to output delay
External reset pulse duration
Input to output local product term output
enable/disable
Input to output global product term out-
put enable/disable
Global OE input to output enable/disable
Global clock width, high or low
Global gate width low (for low transpar-
ent) or high (for high transparent)
Input register clock width, high or low
Clock frequency with internal feedback
Clock frequency with external feedback,
[1/ (t
S
+ t
CO
)]
t
PD_MC
3.2
3.5
3.8
4.2
ns
t
S
1.8
2.0
1.8
2.0
2.0
2.2
2.0
2.2
ns
ns
t
ST
t
SIR
0.7
1.0
1.0
1.0
ns
t
SIRZ
1.7
2.0
2.0
2.0
ns
t
H
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
ns
ns
t
HT
t
HIR
0.9
1.0
1.0
1.0
ns
t
HIRZ
0.0
0.0
0.0
0.0
ns
t
CO
t
R
t
RW
1.5
2.2
3.5
4.0
1.5
2.7
4.0
4.5
1.5
2.7
4.4
5.0
1.5
2.7
4.5
-
5.5
ns
ns
ns
t
PTOE/DIS
ns
t
GPTOE/DIS
5.0
6.5
8.0
8.0
ns
t
GOE/DIS
t
CW
1.1
1.1
3.0
1.3
1.3
3.5
1.3
1.3
4.0
1.3
1.3
4.5
ns
ns
t
GW
ns
t
WIR
f
MAX
1.1
400
250
1.3
333
222
1.3
322
212
1.3
322
212
ns
MHz
4
f
MAX
(Ext.)
MHz
Timing v.3.1
1. Timing numbers are based on default LVCMOS 1.8 I/O buffers. Use timing adjusters provided to calculate other standards.
2. Measured using standard switching circuit, assuming GRP loading of 1 and 1 output switching.
3. Pulse widths and clock widths less than minimum will cause unknown behavior.
4. Standard 16-bit counter using GRP feedback.
相關(guān)PDF資料
PDF描述
LC4256B-3T100C
LC4256B-3T176C
LC4256B-5F256AC
LC4256B-5F256AI
LC4256B-5T100C
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