![](http://datasheet.mmic.net.cn/200000/EP20K100EFC400-1_datasheet_15060225/EP20K100EFC400-1_54.png)
76
Altera Corporation
APEX 20K Programmable Logic Device Family Data Sheet
Preliminary Information
Notes to tables:
(1)
(2)
Minimum DC input is –0.5 V. During transitions, the inputs may undershoot to –2.0 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 VCC rise time is 100 ms, and VCC must rise monotonically.
(5)
All pins, including dedicated inputs, clock, I/O, and JTAG pins, may be driven before VCCINT and VCCIO are
powered.
(6)
Typical values are for TA = 25° C, VCCINT = 2.5 V, and VCCIO = 2.5 V or 3.3 V.
(7)
These values are specified under the APEX 20K device recommended operating conditions, shown in
Table 16 on(8)
The APEX 20K input buffers are compatible with 2.5-V and 3.3-V (LVTTL and LVCMOS). Additionally, the input
buffers are 3.3-V PCI compliant when VCCIO and VCCINT meet the relationship shown in Figure 34 on page 77. (9)
The IOH parameter refers to high-level TTL, PCI, or CMOS output current.
(10) The IOL parameter refers to low-level TTL, PCI, or CMOS output current. This parameter applies to open-drain pins
as well as output pins.
(11) Pin pull-up resistance values will be lower if an external source drives the pin higher than VCCIO.
(12) Capacitance is sample-tested only.
Figure 34 shows the relationship between VCCIO and VCCINT for 3.3-V PCI compliance.
ICC0
VCC supply current (standby)
(All ESBs in power-down mode)
VI = ground, no load, no
toggling inputs, -1 speed
grade
10
mA
VI = ground, no load, no
toggling inputs,
-2, -3 speed grades
5
mA
RCONF
Value of I/O pin pull-up resistor
before and during configuration
20
50
k
30
80
k
Table 18. APEX 20K Device Capacitance
Symbol
Parameter
Conditions
Min
Max
Unit
CIN
Input capacitance
VIN = 0 V, f = 1.0 MHz
8
pF
CINCLK
Input capacitance on dedicated
clock pin
VIN = 0 V, f = 1.0 MHz
12
pF
COUT
Output capacitance
VOUT = 0 V, f = 1.0 MHz
8
pF
Table 17. APEX 20K Device DC Operating Conditions (Part 2 of 2)
Notes (6), (7)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit