Lattice Semiconductor
DC and Switching Characteristics
LatticeSC/M Family Data Sheet
LatticeSC/M External Switching Characteristics3
Over Recommended Commercial Operating Conditions at VCC = 1.2V +/- 5%
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Parameter
Description
Min. Max. Min. Max. Min. Max. Units
General I/O Pin Parameters (using Primary Clock without PLL)2
tCO
Global Clock Input to Output - PIO Output Reg-
ister
2.83
5.74
2.83
6.11
2.83
6.49
ns
tSU
Global Clock Input Setup - PIO Input Register
without fixed input delay
-0.66
—
-0.66
—
-0.66
—
ns
tH
Global Clock Input Hold - PIO Input Register
without fixed input delay
1.73 — 1.95 — 2.16 —
ns
tSU_IDLY
Global Clock Input Setup - PIO Input Register
with input delay
0.86
—
1.03
—
1.20
—
ns
tH_IDLY
Global Clock Input Hold - PIO Input Register
with input delay
-0.17 — -0.17 — -0.17 —
ns
fMAX_PFU Global Clock frequency of PFU register
—
700
—
700
—
700 MHz
fMAX_IO
Global Clock frequency of I/O register
— 1000 — 1000 — 1000 MHz
tGC_SKEW Global Clock skew
—
89
—
103
—
116
ps
General I/O Pin Parameters (using Primary Clock with PLL)1, 2
tCO
Global Clock Input to Output - PIO Output Reg-
ister
2.25
4.81
2.25
5.08
2.25
5.37
ns
tSU
Global Clock Input Setup - PIO Input Register
without fixed input delay
-0.07
—
-0.07
—
-0.07
—
ns
tH
Global Clock Input Hold - PIO Input Register
without fixed input delay
0.80 — 0.93 — 1.04 —
ns
General I/O Pin Parameters (using Edge Clock without PLL)2
tCO
Edge Clock Input to Output - PIO Output Regis-
ter
2.38
4.77
2.38
5.04
2.38
5.33
ns
tSU
Edge Clock Input Setup - PIO Input Register
without fixed input delay
-0.08 — -0.08 — -0.08 —
ns
tH
Edge Clock Input Hold - PIO Input Register
0.49 — 0.58 — 0.66 —
ns
tSU_IDLY
Edge Clock Input Setup - PIO Input Register
with input delay
0.81 — 0.97 — 1.12 —
ns
tH_IDLY
Edge Clock Input Hold - PIO Input Register with
input delay
-0.34
—
-0.34
—
-0.34
—
ns
tEC_SKEW Edge Clock skew
—
28
—
32
—
36
ps
General I/O Pin Parameters (using Latch FF without PLL)2
tSU
Latch FF, Input Setup - PIO Input Register with-
out fixed input delay
-0.14
—
-0.14
—
-0.14
—
ns
tH
Latch FF, Input Hold - PIO Input Register without
fixed input delay
0.58
—
0.68
—
0.77
—
ns
tSU_IDLY
Latch FF, Input Setup - PIO Input Register with
input delay
0.70
—
0.68
—
0.77
—
ns
tH_IDLY
Latch FF, Input Hold - PIO Input Register with
input delay
-0.30
—
-0.30
—
-0.30
—
ns
1. No PLL delay tuning (clock injection removal mode, system clock feedback).
2. Using LVCMOS25 12mA I/O. Timing adders for other supported I/O technologies are specified in the LatticeSC Family Timing Adders table.
3. Complete Timing Parameters for a user design are incorporated when running ispLEVER. This is a sampling of the key timing parameters.
Timing specs are for non-AIL applications.
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