EPM7256AETC100-10N Datasheet, PDF (54/64 Pages) Altera Corporation – Programmable Logic Device Family

MAX 7000A Programmable Logic Device Data Sheet
Table 30. EPM7256A Internal Timing Parameters (Part 2 of 2) Note (1)
Symbol
Parameter
Conditions
Speed Grade
Unit
-6
-7
-10
-12
Min Max Min Max Min Max Min Max
t_COMB Combinatorial delay
t_IC
Array clock delay
t_EN
Register enable time
t_GLOB Global control delay
t_PRE Register preset time
t_CLR Register clear time
t_PIA
PIA delay
(2)
t_LPA
Low-power adder
(6)
1.6
2.0
2.7
3.2 ns
2.7
3.4
4.5
5.4 ns
2.5
3.1
4.2
5.0 ns
1.1
1.4
1.8
2.2 ns
2.3
2.9
3.8
4.6 ns
2.3
2.9
3.8
4.6 ns
1.3
1.6
2.1
2.6 ns
11.0
10.0
10.0
10.0 ns
Notes to tables:
(1) These values are specified under the recommended operating conditions shown in Table 14 on page 28. See
Figure 12 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_LPA parameter
must be added to this minimum width if the clear or reset signal incorporates the t_LAD parameter into the signal
path.
(4) This parameter is measured with a 16-bit loadable, enabled, up/down counter programmed into each LAB.
(5) Operating conditions: V_CCIO = 2.5 ± 0.2 V for commercial and industrial use.
(6) The t_LPA parameter must be added to the t_LAD, t_LAC, t_IC, t_EN, t_SEXP, t_ACL, and t_CPPW parameters for macrocells
running in low-power mode.
Power
Consumption
Supply power (P) versus frequency (f_MAX, in MHz) for MAX 7000A
devices is calculated with the following equation:
P = P_INT + P_IO = I_CCINT × V_CC + P_IO
The P_IO 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 I_CCINT value depends on the switching frequency and the application
logic. The I_CCINT value is calculated with the following equation:
I_CCINT =
(A × MC_TON) + [B × (MC_DEV – MC_TON)] + (C × MC_USED × f_MAX × tog_LC)
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