
30
A1 28 0A T i m i n g C har a c t e r i st i c s
(W or s t - C as e M i l i t a r y Cond i t i o n s , V CC = 4.5 V, TJ = 1 25掳C)
鈥樷€�1鈥� Speed
鈥楽td鈥� Speed
Parameter
Description
Min.
Max.
Min.
Max.
Units
Logic Module Propagation Delays1
tPD1
Single Module
5.2
6.1
ns
tCO
Sequential Clk to Q
5.2
6.1
ns
tGO
Latch G to Q
5.2
6.1
ns
tRS
Flip-Flop (Latch) Reset to Q
5.2
6.1
ns
Logic Module Predicted Routing Delays2
tRD1
FO=1 Routing Delay
2.4
2.8
ns
tRD2
FO=2 Routing Delay
3.4
4.0
ns
tRD3
FO=3 Routing Delay
4.2
4.9
ns
tRD4
FO=4 Routing Delay
5.1
6.0
ns
tRD8
FO=8 Routing Delay
9.2
10.8
ns
Logic Module Sequential Timing3, 4
tSUD
Flip-Flop (Latch) Data Input Setup
0.5
ns
tHD
Flip-Flop (Latch) Data Input Hold
0.0
ns
tSUENA
Flip-Flop (Latch) Enable Setup
1.3
ns
tHENA
Flip-Flop (Latch) Enable Hold
0.0
ns
tWCLKA
Flip-Flop (Latch) Clock Active Pulse
Width
7.4
8.6
ns
tWASYN
Flip-Flop (Latch) Asynchronous Pulse
Width
7.4
8.6
ns
tA
Flip-Flop Clock Input Period
16.4
22.1
ns
tINH
Input Buffer Latch Hold
2.5
ns
tINSU
Input Buffer Latch Setup
鈥�3.5
ns
tOUTH
Output Buffer Latch Hold
0.0
ns
tOUTSU
Output Buffer Latch Setup
0.5
ns
fMAX
Flip-Flop (Latch) Clock Frequency
60
41
MHz
Notes:
1.
For dual-module macros, use tPD1 + tRD1 + tPDn , tCO + tRD1 + tPDn , or tPD1 + tRD1 + tSUD , whichever is appropriate.
2.
Routing delays are for typical designs across worst-case operating conditions. These parameters should be used for estimating device
performance. Post-route timing analysis or simulation is required to determine actual worst-case performance. Post-route timing is
based on actual routing delay measurements performed on the device prior to shipment.
3.
Data applies to macros based on the S-module. Timing parameters for sequential macros constructed from C-modules can be obtained
from the DirectTime Analyzer utility.
4.
Setup and hold timing parameters for the input buffer latch are defined with respect to the PAD and the D input. External setup/hold
timing parameters must account for delay from an external PAD signal to the G inputs. Delay from an external PAD signal to the G input
subtracts (adds) to the internal setup (hold) time.