MAX 3000A Programmable Logic Device Family Data Sheet
Table 22. EPM3512A Internal Timing Parameters (Part 2 of 2)
Note (1)
Speed Grade
Symbol
Parameter
Conditions
Unit
-7
-10
Min
Max
Min
Max
tPRE
tCLR
tPIA
Register preset time
Register clear time
PIA delay
1.0
1.0
3.0
4.5
1.4
1.4
4.0
5.0
ns
ns
ns
ns
(2)
(5)
tLPA
Low-power adder
Notes to tables:
(1) These values are specified under the recommended operating conditions, as shown in Table 10 on page 19. See
Figure 11 on page 23 for more information on switching waveforms.
(2) These values are specified for a PIA fan–out of one LAB (16 macrocells). For each additional LAB fan–out in these
devices, add an additional 0.1 ns to the PIA timing value.
(3) This minimum pulse width for preset and clear applies for both global clear and array controls. The t
parameter
LPA
must be added to this minimum width if the clear or reset signal incorporates the t
parameter into the signal
LAD
path.
(4) These parameters are measured with a 16–bit loadable, enabled, up/down counter programmed into each LAB.
(5) The t parameter must be added to the t , t , t , t , t , t , and t parameters for macrocells
LPA
LAD LAC IC EN SEXP ACL
CPPW
running in low–power mode.
Supply power (P) versus frequency (fMAX, in MHz) for MAX 3000A
devices is calculated with the following equation:
Power
Consumption
P = PINT + PIO = ICCINT × VCC + PIO
The PIO value, which depends on the device output load characteristics
and switching frequency, can be calculated using the guidelines given in
Application Note 74 (Evaluating Power for Altera Devices).
The ICCINT value depends on the switching frequency and the application
logic. The ICCINT value is calculated with the following equation:
ICCINT
=
(A × MCTON) + [B × (MCDEV – MCTON)] + (C × MCUSED × fMAX × togLC
)
The parameters in the ICCINT equation are:
34
Altera Corporation
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