DC & Switching Characteristics
Table 5–25 shows the external I/O timing parameters for EPM1270
devices
Table 5–25. EPM1270 Global Clock External I/O Timing Parameters
-3 Speed Grade -4 Speed Grade -5 Speed Grade
Symbol
Parameter
Condition
Unit
Min
Max
Min
Max
Min
Max
tPD1
Worst case
pin to pin
10 pF
6.2
8.1
10.0
ns
delaythrough
1 look-up
table (LUT)
tPD2
Best case pin
to pin delay
through 1
LUT
10 pF
3.7
4.8
5.9
ns
tSU
tH
Global clock
setup time
1.2
0.0
2.0
1.5
0.0
2.0
1.9
0.0
2.0
ns
ns
ns
Global clock
hold time
tCO
Global clock
to output
delay
10 pF
4.6
5.9
7.3
tCH
tCL
Global clock
high time
166
166
3.3
216
216
4.0
266
266
5.0
ps
ps
ns
Global clock
low time
tCNT
Minimum
global clock
period for
16-bit
counter
fCNT
Maximum
global clock
frequency for
16-bit
304.0
(1)
247.5
201.1
MHz
counter
Note to Table 5–25:
(1) The maximum frequency is limited by the I/O standard on the clock input pin. The 16-bit counter critical delay
performs faster than this global clock input pin maximum frequency.
Altera Corporation
July 2006
Core Version a.b.c variable
5–23
MAX II Device Handbook, Volume 1
INTEL [ INTEL ]
