ProASIC3 DC and Switching Characteristics
2-104
Revision 13
Table 2-121 A3P250 FIFO 1k×4
Worst Commercial-Case Conditions: TJ = 70°C, VCC = 1.425 V
Parameter
Description
–2
–1
Std.
Units
tENS
REN, WEN Setup Time
4.05
4.61
5.42
ns
tENH
REN, WEN Hold Time
0.00
ns
tBKS
BLK Setup Time
0.19
0.22
0.26
ns
tBKH
BLK Hold Time
0.00
ns
tDS
Input Data (WD) Setup Time
0.18
0.21
0.25
ns
tDH
Input Data (WD) Hold Time
0.00
ns
tCKQ1
Clock High to New Data Valid on RD (flow-through)
2.36
2.68
3.15
ns
tCKQ2
Clock High to New Data Valid on RD (pipelined)
0.89
1.02
1.20
ns
tRCKEF
RCLK High to Empty Flag Valid
1.72
1.96
2.30
ns
tWCKFF
WCLK High to Full Flag Valid
1.63
1.86
2.18
ns
tCKAF
Clock High to Almost Empty/Full Flag Valid
6.19
7.05
8.29
ns
tRSTFG
RESET Low to Empty/Full Flag Valid
1.69
1.93
2.27
ns
tRSTAF
RESET Low to Almost Empty/Full Flag Valid
6.13
6.98
8.20
ns
tRSTBQ
RESET Low to Data Out Low on RD (flow-through)
0.92
1.05
1.23
ns
RESET Low to Data Out Low on RD (pipelined)
0.92
1.05
1.23
ns
tREMRSTB
RESET Removal
0.29
0.33
0.38
ns
tRECRSTB
RESET Recovery
1.50
1.71
2.01
ns
tMPWRSTB
RESET Minimum Pulse Width
0.21
0.24
0.29
ns
t
Clock Cycle Time
3.23
3.68
4.32
ns
FMAX
Maximum Frequency for FIFO
310
272
231
MHz