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Data Sheet
ORCA Series 2 FPGAs
June 1999
156
Lucent Technologies Inc.
Timing Characteristics (continued)
Notes:
If the input buffer is placed in delay mode, the chip hold time to the nearest PFU latch is guaranteed to be 0 if the clock is routed using the
primary clock network; (TJ = all, VDD
from the input buffer do not get delayed at any time.
The delays for all input buffers assume an input rise/fall time of
≤1 V/ns.
Speed grades of -5, -6, and -7 are for OR2TxxA devices only
Table 46A. OR2CxxA/OR2TxxA Programmable I/O Cell Timing Characteristics
OR2CxxA Commercial: VDD = 5.0 V ± 5%, 0 °C
≤ TA ≤ 70 °C; OR2CxxA Industrial: VDD = 5.0 V ± 10%, –40 °C ≤ TA ≤ +85 °C.
OR2TxxA Commercial: VDD = 3.0 V to 3.6 V, 0 °C
≤ TA ≤ 70 °C; OR2TxxA Industrial: VDD = 3.0 V to 3.6 V, –40 °C ≤ TA ≤ +85 °C.
Parameter
Symbol
Speed
Unit
-2
-3
-4
-5
-6
-7
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Inputs (TJ = 85 °C, VDD = min)
Input Rise Time
TR
—
500
—
500
—
500
—
500
—
500
—
500
ns
Input Fall Time
TF
—
500
—
500
—
500
—
500
—
500
—
500
ns
Pad to In Delay
PAD_IN_DEL
—
1.7
—
1.5
—
1.3
—
1.2
—
1.2
—
1.1
ns
Pad to Nearest PFU Latch Output
CHIP_LATCH
—
6.2
—
4.7
—
4.1
—
3.5
—
3.1
—
2.9
ns
Delay Added to General Routing
(input buffer in delay mode for
OR2C/2T15A and smaller
devices)
—
8.1
—
7.0
—
6.0
—
5.9
—
6.2
—
5.8
ns
Delay Added to General Routing
(input buffer in delay mode for
OR2C/2T26A and OR2C/2T40A)
—
11.0
—
9.7
—
8.6
—
8.6
—
9.0
—
8.6
ns
Delay Added to Direct-FF Routing
(input buffer in delay mode for
OR2C/2T15A and smaller
devices)
—
8.0
—
6.8
—
5.9
—
6.0
—
6.4
—
6.0
ns
Delay Added to Direct-FF Routing
(input buffer in delay mode for
OR2C/2T26A and OR2C/2T40A)
—
10.9
—
10.2
—
8.5
—
8.6
—
9.1
—
7.9
ns
Outputs (TJ = 85 °C, VDD = min, CL = 50 pF)
PFU CK to Pad Delay (DOUT[3:0] to
PAD):
Fast
Slewlim
Sinklim
DOUT_DEL(F)
DOUT_DEL(SL)
DOUT_DEL(SI)
—
7.1
9.4
11.2
—
6.2
8.4
10.5
—
5.5
7.4
9.4
—
5.0
6.4
9.5
—
4.4
5.6
8.3
—
3.3
4.1
7.2
ns
Output to Pad Delay (OUT[3:0] to
PAD):
Fast
Slewlim
Sinklim
OUT_DEL(F)
OUT_DEL(SL)
OUT_DEL(SI)
—
5.0
6.7
9.8
—
4.0
6.3
7.2
—
3.6
5.5
7.5
—
3.1
4.5
7.6
—
2.7
3.9
6.5
—
2.3
3.1
6.2
ns
3-state Enable Delay (TS[3:0] to
PAD):
Fast
Slewlim
Sinklim
TS_DEL(F)
TS_DEL(SL)
TS_DEL(SI)
—
5.8
7.5
10.6
—
4.7
7.0
7.9
—
4.0
6.3
8.4
—
3.5
5.2
9.3
—
3.1
4.7
8.0
—
2.5
3.7
7.6
ns