ProASIC3 DC and Switching Characteristics
2-96 v1.3
Timing Characteristics
Table 2-109 • FIFO (for all dies except A3P250)
Worst Commercial-Case Conditions: T
J
= 70°C, V
CC
= 1.425 V
Parameter Description –2 –1 Std. –F Units
t
ENS
REN_B, WEN_B Setup Time 1.34 1.52 1.79 2.15 ns
t
ENH
REN_B, WEN_B Hold Time 0.00 0.00 0.00 0.00 ns
t
BKS
BLK_B Setup Time 0.19 0.22 0.26 0.31 ns
t
BKH
BLK_B Hold Time 0.00 0.00 0.00 0.00 ns
t
DS
Input Data (DI) Setup Time 0.18 0.21 0.25 0.29 ns
t
DH
Input Data (DI) Hold Time 0.00 0.00 0.00 0.00 ns
t
CKQ1
Clock HIGH to New Data Valid on DO (flow-through) 2.17 2.47 2.90 3.48 ns
t
CKQ2
Clock HIGH to New Data Valid on DO (pipelined) 0.94 1.07 1.26 1.52 ns
t
RCKEF
RCLK HIGH to Empty Flag Valid 1.72 1.96 2.30 2.76 ns
t
WCKFF
WCLK HIGH to Full Flag Valid 1.63 1.86 2.18 2.62 ns
t
CKAF
Clock HIGH to Almost Empty/Full Flag Valid 6.19 7.05 8.29 9.96 ns
t
RSTFG
RESET_B LOW to Empty/Full Flag Valid 1.69 1.93 2.27 2.72 ns
t
RSTAF
RESET_B LOW to Almost Empty/Full Flag Valid 6.13 6.98 8.20 9.85 ns
t
RSTBQ
RESET_B LOW to Data Out LOW on DO (flow-through) 0.921.051.231.48 ns
RESET_B LOW to Data Out LOW on DO (pipelined) 0.92 1.05 1.23 1.48 ns
t
REMRSTB
RESET_B Removal 0.29 0.33 0.38 0.46 ns
t
RECRSTB
RESET_B Recovery 1.50 1.71 2.01 2.41 ns
t
MPWRSTB
RESET_B Minimum Pulse Width 0.21 0.24 0.29 0.34 ns
t
CYC
Clock Cycle Time 3.23 3.68 4.32 5.19 ns
F
MAX
Maximum Frequency for FIFO 310 272 231 193 MHz
Note: For specific junction temperature and voltage supply levels, refer to Table 2-6 on page 2-6 for derating
values.
