Data Sheet
June 1999
ORCA Series 3C and 3T FPGAs
Timing Characteristics (continued)
(continued)
Table 43. Ripple Mode 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.
Speed
Parameter
Unit
Symbol
-4
-5
-6
-7
J
DD
(T = +85 °C, V = min)
Min Max Min Max Min Max Min Max
Full Ripple Delays (byte wide):
RIPCO_DEL
RIPFCO_DEL
RIP_DEL
Operands to Carry-out (Kz[1:0] to COUT)
Operands to Carry-out (Kz[1:0] to FCOUT)
Operands to PFU Out (Kz[1:0] to F[7:0])
Bitwise Operands to PFU Out (Kz[1:0] to F[z])
Fast Carry-in to Carry-out (FCIN to COUT)
Fast Carry-in to Fast Carry-out (FCIN to FCOUT)
Carry-in to Carry-out (CIN to COUT)
Carry-in to Fast Carry-out (CIN to FCOUT)
Fast Carry-in PFU Out (FCIN to F[7:0])
Carry-in PFU Out (CIN to F[7:0])
—
—
—
—
—
—
—
—
—
—
—
—
—
5.32
5.30
7.37
2.34
2.59
2.57
3.47
3.46
6.03
6.91
8.28
8.11
10.66
—
—
—
—
—
—
—
—
—
—
—
—
—
4.11
4.10
5.60
1.80
1.99
1.98
2.65
2.64
4.55
5.21
5.89
5.78
7.55
—
—
—
—
—
—
—
—
—
—
—
—
—
2.98
2.98
4.18
1.32
1.43
1.41
1.79
1.78
3.21
3.53
4.58
4.48
5.85
—
—
—
—
—
—
—
—
—
—
—
—
—
2.32 ns
2.32 ns
3.10 ns
1.05 ns
1.14 ns
1.13 ns
1.43 ns
1.43 ns
2.51 ns
3.05 ns
3.45 ns
3.38 ns
4.38 ns
FRIP_DEL
FCINCO_DEL
FCINFCO_DEL
CINCO_DEL
CINFCO_DEL
FCIN_DEL
CIN_DEL
ASCO_DEL
ASFCO_DEL
AS_DEL
Add/Subtract to Carry-out (ASWE to COUT)
Add/Subtract to Carry-out (ASWE to FCOUT)
Add/Subtract to PFU Out (ASWE to F[7:0])
Half Ripple Delays (nibble wide):
HRIPCO_DEL
HRIPFCO_DEL
HRIP_DEL
Operands to Carry-out (Kz[1:0] to COUT)
Operands to Fast Carry-out (Kz[1:0] to FCOUT)
Operands to PFU Out (Kz[1:0] to F[3:0])
Bitwise Operands to PFU Out (Kz[1:0] to F[z])
Fast Carry-in to Carry-out (FCIN to COUT)
Fast Carry-in to Fast Carry-out (FCIN to FCOUT)
Carry-in to Carry-out (CIN to COUT)
Carry-in to Carry-out (CIN to FCOUT)
Fast Carry-in PFU Out (FCIN to F[3:0])
Carry-in PFU Out (CIN to F[3:0])
—
—
—
—
—
—
—
—
—
—
—
—
—
5.32
5.30
5.50
2.34
2.59
2.57
3.47
3.46
3.76
4.65
8.28
8.11
9.12
—
—
—
—
—
—
—
—
—
—
—
—
—
4.11
4.10
4.07
1.80
1.99
1.98
2.65
2.64
2.84
3.50
5.89
5.78
6.49
—
—
—
—
—
—
—
—
—
—
—
—
—
2.98
2.98
3.20
1.32
1.43
1.41
1.79
1.78
2.01
2.33
4.58
4.48
4.86
—
—
—
—
—
—
—
—
—
—
—
—
—
2.32 ns
2.32 ns
2.40 ns
1.05 ns
1.14 ns
1.13 ns
1.43 ns
1.43 ns
1.58 ns
2.12 ns
3.45 ns
3.38 ns
3.69 ns
HFRIP_DEL
HFCINCO_DEL
HFCINFCO_DEL
HCINCO_DEL
HCINFCO_DEL
HFCIN_DEL
HCIN_DEL
HASCO_DEL
HASFCO_DEL
HAS_DEL
Add/Subtract to Carry-out (ASWE to COUT)
Add/Subtract to Carry-out (ASWE to FCOUT)
Add/Subtract to PFU Out (ASWE to F[3:0])
ORCA
Note: The table shows worst-case delay for the ripple chain.
be less than or equal to those listed above.
Foundry reports the delay for individual paths within the ripple chain that will
108
Lucent Technologies Inc.
AGERE [ AGERE SYSTEMS ]
