Altera Corporation 10–3
September 2008
Recommended Operating Conditions
R
CONF
Value of I/O pin pull-up
resistor before and during
configuration emulation
V
CCIO
=3.0 V (12) 20 50 kΩ
V
CCIO
= 2.375 V (12) 30 80 kΩ
V
CCIO
= 1.71 V (12) 60 150 kΩ
Table 10–4. HardCopy APEX Device Capacitance Note (13)
Symbol Parameter Conditions Min Typ Max
C
IN
Input capacitance V
IN
= 0 V, f = 1.0 MHz 8 pF
C
INCLK
Input capacitance on
dedicated clock pin
V
IN
= 0 V, f = 1.0 MHz 12 pF
C
OUT
Output capacitance V
OUT
= 0 V, f = 1.0 MHz 8 pF
Notes to Tab le 1 0– 1 through 10–4:
(1) Refer to the Operating Requirements for Altera Devices Data Sheet.
(2) Minimum DC input is –0.5 V. During transitions, the inputs may undershoot to –0.5 V or overshoot to 4.6 V for
input currents less than 100 mA and periods shorter than 20 ns.
(3) Numbers in parentheses are for industrial-temperature-range devices.
(4) Maximum V
CC
rise time is 100 ms, and V
CC
must rise monotonically.
(5) All pins (including dedicated inputs, clock, I/O, and JTAG pins) may be driven before V
CCINT
and V
CCIO
are
powered.
(6) Typical values are for T
A
= 25° C, V
CCINT
= 1.8 V, and V
CCIO
= 1.8 V, 2.5 V, or 3.3 V.
(7) These values are specified under the HardCopy device recommended operating conditions, as shown in Table 10–2
on page 10–1.
(8) Refer to AN 117: Using Selectable I/O Standards in Altera Devices for the V
IH
, V
IL
, V
OH
, V
OL
, and I
I
parameters when
V
CCIO
= 1.8 V.
(9) The APEX 20KE input buffers are compatible with 1.8-V, 2.5-V and 3.3-V (LVTTL and LVCMOS) signals.
Additionally, the input buffers are 3.3-V PCI compliant. Input buffers also meet specifications for GTL+, CTT, AGP,
SSTL-2, SSTL-3, and HSTL.
(10) The I
OH
parameter refers to high-level TTL, PCI, or CMOS output current.
(11) This value is specified for normal device operation. The value may vary during power-up.
(12) Pin pull-up resistance values will be lower if an external source drives the pin higher than V
CCIO
.
(13) Capacitance is sample-tested only.
Table 10–3. HardCopy APEX Device DC Operating Conditions (Part 2 of 2) Notes (6), (7), (8)
Symbol Parameter Conditions Min Typ Max Unit
