EP4SGX180DF29I3N Datasheet, PDF (19/82 Pages) Altera Corporation – Stratix IV Device Handbook Volume 4: Device Datasheet and Addendum

Chapter 1: DC and Switching Characteristics for Stratix IV Devices
Electrical Characteristics
1–11
Table 1–14. Pin Capacitance for Stratix IV Devices (Part 2 of 2)
Symbol
C_OUTFB
C_CLK1, C_CLK3, C_CLK8,
and C_CLK10
Description
Input capacitance on the dual-purpose clock output and feedback pins
Input capacitance for dedicated clock input pins
Value
Unit
5
pF
2
pF
Hot Socketing
Table 1–15 lists the hot socketing specifications for Stratix IV devices.
Table 1–15. Hot Socketing Specifications for Stratix IV Devices
Symbol
Description
Maximum
I_{IOPIN (DC)}
I_{IOPIN (AC)}
DC current per I/O pin
AC current per I/O pin
300 A
8 mA ⁽¹⁾
I_{XCVR-TX (DC)}
DC current per transceiver TX pin
100 mA
I_{XCVR-RX (DC)}
DC current per transceiver RX pin
50 mA
Note to Table 1–15:
(1) The I/O ramp rate is 10 ns or more. For ramp rates faster than 10 ns, |I_IOPIN| = C dv/dt, in which C is the I/O pin
capacitance and dv/dt is the slew rate.
Internal Weak Pull-Up Resistor
Table 1–16 lists the weak pull-up resistor values for Stratix IV devices.
Table 1–16. Internal Weak Pull-Up Resistor for Stratix IV Devices ⁽¹⁾, ⁽³⁾
Symbol
Description
Conditions (V)
Value ⁽⁴⁾
Unit
V_CCIO = 3.0 ±5% ⁽²⁾
Value of the I/O pin pull-up resistor before
V_CCIO = 2.5 ±5% ⁽²⁾
R_PU
and during configuration, as well as user
mode if the programmable pull-up resistor
V_CCIO = 1.8 ±5% ⁽²⁾
option is enabled.
V_CCIO = 1.5 ±5% ⁽²⁾
V_CCIO = 1.2 ±5% ⁽²⁾
25
k
25
k
25
k
25
k
25
k
Notes to Table 1–16:
(1) All I/O pins have an option to enable weak pull-up except configuration, test, and JTAG pins.
(2) Pin pull-up resistance values may be lower if an external source drives the pin higher than V_CCIO.
(3) The internal weak pull-down feature is only available for the JTAG TCK pin. The typical value for this internal weak pull-down resistor is
approximately 25 k 
(4) These specifications are valid with ±10% tolerances to cover changes over PVT.
January 2014 Altera Corporation
Stratix IV Device Handbook
Volume 4: Device Datasheet and Addendum