Device Architecture
Timing Characteristics
Table 2-1 • Combinatorial Cell Propagation Delays
Commercial-Case Conditions: TJ = 70°C, Worst-Case VCC = 1.425 V
Combinatorial Cell
INV
Equation
Y = !A
Parameter
tPD
–2
–1
Std.
0.54
0.63
0.63
0.65
0.65
0.99
0.93
1.17
0.68
0.75
Units
ns
0.40
0.47
0.47
0.49
0.49
0.74
0.70
0.87
0.51
0.56
0.46
0.54
0.54
0.55
0.55
0.84
0.79
1.00
0.58
0.64
AND2
Y = A · B
tPD
ns
NAND2
OR2
Y = !(A · B)
Y = A + B
tPD
ns
tPD
ns
NOR2
Y = !(A + B)
Y = A ⊕ B
Y = MAJ(A, B, C)
Y = A ⊕ B ⊕ C
Y = A !S + B S
Y = A · B · C
tPD
ns
XOR2
tPD
ns
MAJ3
tPD
ns
XOR3
tPD
ns
MUX2
AND3
tPD
ns
tPD
ns
Note: For the derating values at specific junction temperature and voltage supply levels, refer to Table 3-7 on
page 3-9.
Sample VersaTile Specifications—Sequential Module
The Fusion library offers a wide variety of sequential cells, including flip-flops and latches. Each has
a data input and optional enable, clear, or preset. In this section, timing characteristics are
presented for a representative sample from the library (Figure 2-5). For more details, refer to the
Fusion, IGLOO/e and ProASIC3/E Macro Library Guide.
2-6
Preliminary v1.7
ACTEL [ Actel Corporation ]
