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104
Lattice Semiconductor
Data Sheet
November 2006
ORCA Series 3C and 3T FPGAs
Timing Characteristics (continued)
Table 42. Sequential PFU Timing Characteristics
OR3Cxx Commercial: VDD = 5.0 V ± 5%, 0 °C < TA < 70 °C; Industrial: VDD = 5.0 V ± 10%, –40 °C < TA < +85 °C.
OR3Txxx Commercial: VDD = 3.0 V to 3.6 V, 0 °C < TA < 70 °C; Industrial: VDD = 3.0 V to 3.6 V, –40 °C < TA < +85 °C.
Parameter
Symbol
Speed
Unit
-4
-5
-6
-7
Min
Max
Min Max Min Max Min Max
Input Requirements
Clock Low Time
CLKL_MPW
3.36
—
2.07
—
0.94
—
0.72
—
ns
Clock High Time
CLKH_MPW
1.61
—
1.06
—
0.54
—
0.45
—
ns
Global S/R Pulse Width (GSRN)
GSR_MPW
3.36
—
2.07
—
0.94
—
0.72
—
ns
Local S/R Pulse Width
LSR_MPW
3.36
—
2.07
—
0.94
—
0.72
—
ns
Combinatorial Setup Times (TJ = +85 °C, VDD = min):
Four-input Variables to Clock (Kz[3:0] to CLK)*
Five-input Variables to Clock (F5[A:D] to CLK)
Data In to Clock (DIN[7:0] to CLK)
Carry-in to Clock, DIRECT to REGCOUT (CIN to CLK)
Clock Enable to Clock (CE to CLK)
Clock Enable to Clock (ASWE to CLK)
Local Set/Reset to Clock (SYNC) (LSR to CLK)
Data Select to Clock (SEL to CLK)
Two-level LUT to Clock (Kz[3:0] to CLK w/feedbk)*
Two-level LUT to Clock (F5[A:D] to CLK w/feedbk)
Three-level LUT to Clock (Kz[3:0] to CLK w/feedbk)*
Three-level LUT to Clock (F5[A:D] to CLK w/feedbk)
F4_SET
F5_SET
DIN_SET
CINDIR_SET
CE1_SET
CE2_SET
LSR_SET
SEL_SET
SWL2_SET
SWL2F5_SET
SWL3_SET
SWL3F5_SET
1.99
1.79
0.47
1.25
2.86
1.68
1.86
1.37
3.98
4.06
6.49
6.39
—
1.47
1.33
0.32
0.99
2.15
1.30
1.36
1.00
2.99
2.97
4.81
4.73
—
1.08
1.03
0.18
0.71
1.80
0.95
0.86
0.92
2.13
2.29
3.42
3.34
—
0.85
0.81
0.16
0.58
1.37
0.77
0.68
0.70
1.63
1.68
2.64
2.57
—
ns
Combinatorial Hold Times (TJ = all, VDD = all):
Data In (DIN[7:0] from CLK)
Carry-in from Clock, DIRECT to REGCOUT (CIN from
CLK)
Clock Enable (CE from CLK)
Clock Enable from Clock (ASWE from CLK)
Local Set/Reset from Clock (sync) (LSR from CLK)
Data Select from Clock (SEL from CLK)
All Others
DIN_HLD
CINDIR_HLD
CE1_HLD
CE2_HLD
LSR_HLD
SEL_HLD
—
0.00
—
0.00
—
0.00
—
0.00
—
ns
Output Characteristics
Sequential Delays (TJ = +85 °C, VDD = min):
Local S/R (async) to PFU Out (LSR to Q[7:0], REG-
COUT)
Global S/R to PFU Out (GSRN to Q[7:0], REGCOUT)
Clock to PFU Out—Register (CLK to Q[7:0], REG-
COUT)
Clock to PFU Out—Latch (CLK to Q[7:0])
Transparent Latch (DIN[7:0] to Q[7:0])
LSR_DEL
GSR_DEL
REG_DEL
LTCH_DEL
LTCHD_DEL
—
7.02
5.21
2.38
2.51
2.73
—
5.29
3.90
1.75
1.88
2.10
—
3.64
2.55
1.26
1.21
1.38
—
2.90
2.00
0.97
0.96
1.12
ns
* Four-input variables’ (KZ[3:0]) setup times are valid for LUTs in both F4 (four-input LUT) and F5 (ve-input LUT) modes.
Note: The table shows worst-case delays. ispLEVER reports the delays for individual paths within a group of paths representing the same
timing parameter and may accurately report delays that are less than those listed.
Select
devices
have
been
discontinued.
See
Ordering
Information
section
for
product
status.