Data Sheet
June 1999
ORCA Series 2 FPGAs
Timing Characteristics (continued)
Table 34A. OR2CxxA and OR2TxxA Ripple Mode PFU 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.
Speed
Parameter
Symbol
Unit
-2
-3
-4
-5
-6
-7
Min Max Min Max Min Max Min Max Min Max Min Max
Ripple Setup Times
(TJ = +85 °C, VDD = min):
Operands to Clock (A[3:0], B[3:0] to CK)
Bitwise Operands to Clock
(A[i], B[i] to CK at F[i])
RIP_SET
FRIP_SET
6.7
2.4
—
—
5.0
1.7
—
—
3.7
1.3
—
—
3.3
1.2
—
—
2.8
1.0
—
—
2.5
0.9
—
—
ns
ns
Carry-in from Fast Carry to Clock
(CIN to CK)
Carry-in from General Routing to Clock
(B4 to CK)
CIN_SET
B4_SET
4.0
4.0
—
—
3.2
3.2
—
—
1.9
1.9
—
—
1.7
1.7
—
—
1.4
1.4
—
—
1.3
1.3
—
—
ns
ns
Add/Subtract to Clock (A4 to CK)
AS_SET
TH
8.2
0.0
—
—
5.6
0.0
—
—
4.3
0.0
—
—
3.9
0.0
—
—
3.2
0.0
—
—
3.1
0.0
—
—
ns
ns
Ripple Hold Times (TJ = all, VDD = all): All
Ripple Delays (TJ = 85 °C, VDD = min):
Operands to Carry-out (A[3:0], B[3:0]
to COUT)
Operands to Carry-out (A[3:0], B[3:0]
to O4)
Operands to PFU Out (A[3:0], B[3:0]
to F[3:0])
Bitwise Operands to PFU Out (A[i], B[i]
to F[i])
Carry-in from Fast Carry to Carry-out
(CIN to COUT)
Carry-in from Fast Carry to Carry-out
(CIN to O4)
Carry-in from Fast Carry to PFU Out
(CIN to F[3:0])
Carry-in from General Routing to Carry-
out (B4 to COUT)
RIP_CODEL
RIP_O4DEL
RIP_DEL
—
—
—
—
—
—
—
—
—
—
5.4
6.9
8.2
4.0
1.9
3.5
5.6
1.9
3.5
5.6
—
—
—
—
—
—
—
—
—
—
3.8
4.8
6.0
2.8
1.6
2.6
4.2
1.6
2.6
4.2
—
—
—
—
—
—
—
—
—
—
3.3
4.2
4.7
2.1
1.1
2.1
2.9
1.1
2.1
2.9
—
—
—
—
—
—
—
—
—
—
2.6
3.4
3.8
1.7
0.9
1.7
2.3
0.9
1.7
2.3
—
—
—
—
—
—
—
—
—
—
2.1
2.6
3.2
1.6
0.7
1.3
2.2
0.7
1.3
2.2
—
—
—
—
—
—
—
—
—
—
1.8
2.4
2.8
1.5
0.6
1.1
1.7
0.6
1.1
2.1
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
FRIP_DEL
CIN_CODEL
CIN_O4DEL
CIN_DEL
B4_CODEL
B4_O4DEL
B4_DEL
Carry-in from General Routing to Carry-
out (B4 to O4)
Carry-in from General Routing to PFU Out
(B4 to F[3:0])
Add/Subtract to Carry-out (A4 to COUT)
Add/Subtract to Carry-out (A4 to O4)
Add/Subtract to PFU Out (A4 to F[3:0])
AS_CODEL
AS_O4DEL
AS_DEL
—
—
—
6.1
7.6
9.7
—
—
—
4.5
5.6
6.8
—
—
—
3.9
4.9
5.3
—
—
—
3.1
3.9
4.3
—
—
—
2.5
3.1
3.5
—
—
—
2.3
2.8
3.1
ns
ns
ns
Notes:
The new 4 x 1 multiplier and 4-bit comparator submodes use the appropriate ripple mode timing shown above.
Speed grades of -5, -6, and -7 are for OR2TxxA devices only.
136
Lucent Technologies Inc.
ETC [ ETC ]
