EPF10K30E Datasheet, PDF (43/100 Pages) Altera Corporation – Embedded Programmable Logic Device

FLEX 10KE Embedded Programmable Logic Devices Data Sheet
The VCCINT pins must always be connected to a 2.5-V power supply.
With a 2.5-V V_CCINT level, input voltages are compatible with 2.5-V, 3.3-
V, and 5.0-V inputs. The VCCIO pins can be connected to either a 2.5-V or
3.3-V power supply, depending on the output requirements. When the
VCCIO pins are connected to a 2.5-V power supply, the output levels are
compatible with 2.5-V systems. When the VCCIO pins are connected to a
3.3-V power supply, the output high is at 3.3 V and is therefore compatible
with 3.3-V or 5.0-V systems. Devices operating with V_CCIO levels higher
than 3.0 V achieve a faster timing delay of t_OD2 instead of t_OD1.
Table 14 summarizes FLEX 10KE MultiVolt I/O support.
Table 14. FLEX 10KE MultiVolt I/O Support
V_CCIO (V)
2.5
3.3
Input Signal (V)
2.5
3.3
5.0
v v(1) v(1)
vv
v(1)
Output Signal (V)
2.5
3.3
5.0
v
v(2)
v
v
Notes:
(1) The PCI clamping diode must be disabled to drive an input with voltages higher
than V_CCIO.
(2) When V_CCIO = 3.3 V, a FLEX 10KE device can drive a 2.5-V device that has 3.3-V
tolerant inputs.
Open-drain output pins on FLEX 10KE devices (with a pull-up resistor to
the 5.0-V supply) can drive 5.0-V CMOS input pins that require a V_IH of
3.5 V. When the open-drain pin is active, it will drive low. When the pin is
inactive, the trace will be pulled up to 5.0 V by the resistor. The open-drain
pin will only drive low or tri-state; it will never drive high. The rise time
is dependent on the value of the pull-up resistor and load impedance. The
I_OL current specification should be considered when selecting a pull-up
resistor.
Power Sequencing & Hot-Socketing
Because FLEX 10KE devices can be used in a mixed-voltage environment,
they have been designed specifically to tolerate any possible power-up
sequence. The V_CCIO and V_CCINT power planes can be powered in any
order.
Signals can be driven into FLEX 10KE devices before and during power
up without damaging the device. Additionally, FLEX 10KE devices do not
drive out during power up. Once operating conditions are reached,
FLEX 10KE devices operate as specified by the user.
Altera Corporation
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