MAX 7000A Programmable Logic Device Data Sheet
Table 27. 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
tRD
Register delay
1.6
1.6
2.7
2.5
1.1
2.3
2.3
1.3
11.0
2.0
2.0
3.4
3.1
1.4
2.9
2.9
1.6
10.0
2.7
2.7
4.5
4.2
1.8
3.8
3.8
2.1
10.0
3.2
3.2
5.4
5.0
2.2
4.6
4.6
2.6
ns
ns
ns
ns
ns
ns
ns
ns
tCOMB
tIC
Combinatorial delay
Array clock delay
Register enable time
Global control delay
Register preset time
Register clear time
PIA delay
tEN
tGLOB
tPRE
tCLR
tPIA
(2)
(6)
tLPA
Low-power adder
10.0 ns
Notes to tables:
(1) These values are specified under the recommended operating conditions shown in Table 11 on page 24. 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
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) This parameter is measured with a 16-bit loadable, enabled, up/down counter programmed into each LAB.
(5) Operating conditions: V = 2.5 ± 0.2 V for commercial and industrial use.
CCIO
(6) 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 7000A
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
)
50
Altera Corporation
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