
Chapter 1: Device Datasheet for Arria II Devices
1–13
Electrical Characteristics
December 2013
Altera Corporation
Table 1–17 lists the pin capacitance for Arria II GZ devices.
Internal Weak Pull-Up and Weak Pull-Down Resistors
Table 1–18 lists the weak pull-up and pull-down resistor values for Arria II GX
devices.
Table 1–17. Pin Capacitance for Arria II GZ Devices
Symbol
Description
Typical
Unit
CIOTB
Input capacitance on the top and bottom I/O pins
4
pF
CIOLR
Input capacitance on the left and right I/O pins
4
pF
CCLKTB
Input capacitance on the top and bottom non-dedicated clock input pins
4
pF
CCLKLR
Input capacitance on the left and right non-dedicated clock input pins
4
pF
COUTFB
Input capacitance on the dual-purpose clock output and feedback pins
5
pF
CCLK1, CCLK3, CCLK8,
and CCLK10
Input capacitance for dedicated clock input pins
2
pF
Table 1–18. Internal Weak Pull-up and Weak Pull-Down Resistors for Arria II GX Devices
Symbol
Description
Conditions
Min
Typ
Max
Unit
RPU
Value of I/O pin pull-up resistor
before and during configuration,
as well as user mode if the
programmable pull-up resistor
option is enabled.
725
41
k
728
47
k
835
61
k
10
57
108
k
13
82
163
k
19
143
351
k
RPD
Value of TCK pin pull-down
resistor
VCCIO = 3.3 V ±5%
6
19
29
k
VCCIO = 3.0 V ±5%
6
22
32
k
VCCIO = 2.5 V ±5%
6
25
42
k
VCCIO = 1.8 V ±5%
7
35
70
k
VCCIO = 1.5 V ±5%
8
50
112
k
(1) All I/O pins have an option to enable weak pull-up except configuration, test, and JTAG pins. The weak pull-down feature is only available for
JTAG TCK.
(2) Pin pull-up resistance values may be lower if an external source drives the pin higher than VCCIO.