![](http://datasheet.mmic.net.cn/330000/LC4032ZC-35M56C_datasheet_16422085/LC4032ZC-35M56C_23.png)
Lattice Semiconductor
ispMACH 4000V/B/C/Z Family Data Sheet
23
ispMACH 4000V/B/C External Switching Characteristics (Cont.)
Over Recommended Operating Conditions
Parameter
Description
1, 2, 3
-5
-75
-10
Units
Min.
Max.
Min.
Max.
Min.
Max.
t
PD
t
PD_MC
t
S
t
ST
t
SIR
t
SIRZ
t
H
t
HT
t
HIR
5-PT bypass combinatorial propagation delay
—
5.0
—
7.5
—
10.0
ns
20-PT combinatorial propagation delay through macrocell
—
5.5
—
8.0
—
10.5
ns
GLB register setup time before clock
3.0
—
4.5
—
5.5
—
ns
GLB register setup time before clock with T-type register
3.2
—
4.7
—
5.5
—
ns
GLB register setup time before clock, input register path
1.2
—
1.7
—
1.7
—
ns
GLB register setup time before clock with zero hold
2.2
—
2.7
—
2.7
—
ns
GLB register hold time after clock
0.0
—
0.0
—
0.0
—
ns
GLB register hold time after clock with T-type register
0.0
—
0.0
—
0.0
—
ns
GLB register hold time after clock, input register path
1.0
—
1.0
—
1.0
—
ns
t
HIRZ
GLB register hold time after clock, input register path with
zero hold
0.0
—
0.0
—
0.0
—
ns
t
CO
t
R
t
RW
t
PTOE/DIS
t
GPTOE/DIS
t
GOE/DIS
t
CW
GLB register clock-to-output delay
—
3.4
—
4.5
—
6.0
ns
External reset pin to output delay
—
6.3
—
9.0
—
10.5
ns
External reset pulse duration
2.0
—
4.0
—
4.0
—
ns
Input to output local product term output enable/disable
—
7.0
—
9.0
—
10.5
ns
Input to output global product term output enable/disable
—
9.0
—
10.3
—
12.0
ns
Global OE input to output enable/disable
—
5.0
—
7.0
—
8.0
ns
Global clock width, high or low
2.2
—
3.3
—
4.0
—
ns
t
GW
Global gate width low (for low transparent) or high (for
high transparent)
2.2
—
3.3
—
4.0
—
ns
t
WIR
f
MAX
f
MAX
(Ext.) Clock frequency with external feedback, [1/ (t
S
+ t
CO
)]
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.
Input register clock width, high or low
2.2
—
3.3
—
4.0
—
ns
4
Clock frequency with internal feedback
227
—
168
—
125
—
MHz
156
—
111
—
86
—
MHz
Timing v.3.2