Chapter 5: DC and Switching Characteristics
5–21
Timing Model and Specifications
Table 5–26 shows the external I/O timing parameters for EPM2210 devices.
Table 5–26. EPM2210 Global Clock External I/O Timing Parameters
MAX II / MAX IIG
–3 Speed Grade –4 Speed Grade –5 Speed Grade
Symbol
tPD1
Parameter
Condition
Min
Max
Min
Max
Min
Max
Unit
Worst case pin-to-pin delay
through 1 look-up table
(LUT)
10 pF
—
7.0
—
9.1
—
11.2
ns
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
Global clock hold time
Global clock to output delay
Global clock high time
Global clock low time
—
—
1.2
0
—
—
4.6
—
—
—
1.5
0
—
—
6.0
—
—
—
1.9
0
—
—
7.4
—
—
—
ns
ns
ns
ps
ps
ns
tCO
tCH
tCL
tCNT
10 pF
—
2.0
166
166
3.3
2.0
216
216
4.0
2.0
266
266
5.0
—
Minimum global clock
period for
—
16-bit counter
fCNT
Maximum global clock
frequency for 16-bit counter
—
—
304.0
(1)
—
247.5
—
201.1
MHz
Note to Table 5–26:
(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.
External Timing I/O Delay Adders
The I/O delay timing parameters for I/O standard input and output adders, and
input delays are specified by speed grade independent of device density.
Table 5–27 through Table 5–31 show the adder delays associated with I/O pins for all
packages. The delay numbers for –3, –4, and –5 speed grades shown in Table 5–27
through Table 5–33 are based on an EPM1270 device target, while –6, –7, and –8 speed
grade values are based on an EPM570Z device target. If an I/O standard other than
3.3-V LVTTL is selected, add the input delay adder to the external tSU timing
parameters shown in Table 5–23 through Table 5–26. If an I/O standard other than
3.3-V LVTTL with 16 mA drive strength and fast slew rate is selected, add the output
delay adder to the external tCO and tPD shown in Table 5–23 through Table 5–26.
Table 5–27. External Timing Input Delay Adders (Part 1 of 2)
MAX II / MAX IIG
MAX IIZ
–3 Speed
Grade
–4 Speed
Grade
–5 Speed
Grade
–6 Speed
Grade
–7 Speed
Grade
–8 Speed
Grade
I/O Standard
3.3-V LVTTL Without Schmitt
Min Max Min Max Min Max Min Max Min Max Min Max Unit
—
0
—
0
—
0
—
0
—
0
—
0
ps
Trigger
With Schmitt
Trigger
—
334
—
434
—
535
—
387
—
434
—
442
ps
© August 2009 Altera Corporation
MAX II Device Handbook
INTEL [ INTEL ]
