Data Sheet
June 1999
ORCA
Series 3C and 3T FPGAs
Timing Characteristics
(continued)
Table 43. Ripple Mode PFU Timing Characteristics
OR3Cxx Commercial: V
DD
= 5.0 V ± 5%, 0 °C
<
T
A
<
70 °C; Industrial: V
DD
= 5.0 V ± 10%, –40 °C
<
T
A
<
+85 °C.
OR3Txxx Commercial: V
DD
= 3.0 V to 3.6 V, 0 °C
<
T
A
<
70 °C; Industrial: V
DD
= 3.0 V to 3.6 V, –40 °C
<
T
A
<
+85 °C
.
Speed
Parameter
(T
J
= +85 °C, V
DD
= min)
Full Ripple Setup Times (byte wide):
Operands to Clock (Kz[1:0] to CLK)
Bitwise Operands to Clock (Kz[1:0] to CLK at F[z])
Fast Carry-in to Clock (FCIN to CLK)
Carry-in to Clock (CIN to CLK)
Add/Subtract to Clock (ASWE to CLK)
Operands to Clock (Kz[1:0] to CLK at REGCOUT)
Fast Carry-in to Clock (FCIN to CLK at REGCOUT)
Carry-in to Clock (CIN to CLK at REGCOUT)
Add/Subtract to Clock (ASWE to CLK at REGCOUT)
Full Ripple Hold Times (T
J
= all, V
DD
= all):
Fast Carry-in from Clock (FCIN from CLK at REG-
COUT)
All Others
Half Ripple Setup Times (nibble wide):
Operands to Clock (Kz[1:0] to CLK)
Bitwise Operands to Clock (Kz[1:0] to CLK at F[z])
Fast Carry-in to Clock (FCIN to CLK)
Carry-in to Clock (CIN to CLK)
Add/Subtract to Clock (ASWE to CLK)
Operands to Clock (Kz[1:0] to CLK at REGCOUT)
Fast Carry-in to Clock (FCIN to CLK at REGCOUT)
Carry-in to Clock (CIN to CLK at REGCOUT)
Add/Subtract to Clock (ASWE to CLK at REGCOUT)
Half Ripple Hold Times (T
J
= all, V
DD
= all):
Fast Carry-in from Clock (HFCIN from CLK at REG-
COUT)
All Others
Symbol
-4
-5
-6
-7
Unit
Min Max Min Max Min Max Min Max
RIP_SET
FRIP_SET
FCIN_SET
CIN_SET
AS_SET
RIPRC_SET
FCINRC_SET
CINRC_SET
ASRC_SET
FCINRC_HLD
GENERIC_HLD
HRIP_SET
HFRIP_SET
HFCIN_SET
HCIN_SET
HAS_SET
HRIPRC_SET
HFCINRC_SET
HCINRC_SET
HASRC_SET
HFCINRC_HLD
GENERIC_HLD
3.50
1.99
2.55
3.80
8.82
2.09
2.29
3.09
8.14
0.00
0.00
3.91
1.99
2.55
3.80
8.82
3.03
2.29
3.09
8.14
0.00
0.00
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2.50
1.47
1.87
2.79
6.18
1.61
1.76
2.36
5.73
0.00
0.00
2.81
1.47
1.87
2.79
6.18
2.31
1.76
2.36
5.73
0.00
0.00
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1.96
1.08
1.34
1.97
4.68
1.19
1.28
1.73
4.54
0.00
0.00
2.21
1.08
1.34
1.97
4.68
1.68
1.28
1.73
4.54
0.00
0.00
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1.48
0.85
1.04
1.56
3.50
0.93
1.02
1.35
3.39
0.00
0.00
1.66
0.85
1.04
1.56
3.50
1.32
1.02
1.35
3.39
0.00
0.00
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Note: The table shows worst-case delay for the ripple chain.
ORCA
Foundry reports the delay for individual paths within the ripple chain that
will be less than or equal to those listed above.
Lucent Technologies Inc.
107
AGERE [ AGERE SYSTEMS ]
