EP4CE30F29C6N datasheet(11/42 Pages) ALTERA

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Chapter 1: Cyclone IV Device Datasheet

1–11

Operating Conditions

December 2013

Altera Corporation

Cyclone IV Device Handbook,

Volume 3

Internal Weak Pull-Up and Weak Pull-Down Resistor

Table 1–12 lists the weak pull-up and pull-down resistor values for Cyclone IV

devices.

Hot-Socketing

Table 1–13 lists the hot-socketing specifications for Cyclone IV devices.

1 During hot-socketing, the I/O pin capacitance is less than 15 pF and the clock pin

capacitance is less than 20 pF.

Table 1–12. Internal Weak Pull

-Up and Weak Pull-Down Resistor Values for Cyclone IV Devices (1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

R_PU

Value of the I/O pin pull-up resistor

before and during configuration, as

well as user mode if you enable the

programmable pull-up resistor option

VCCIO = 3.3 V ± 5% (2), (3)

725



VCCIO = 3.0 V ± 5% (2), (3)

728



VCCIO = 2.5 V ± 5% (2), (3)

835



VCCIO = 1.8 V ± 5% (2), (3)

108



VCCIO = 1.5 V ± 5% (2), (3)

163



VCCIO = 1.2 V ± 5% (2), (3)

143

351



R_PD

Value of the I/O pin pull-down resistor

before and during configuration

VCCIO = 3.3 V ± 5% (4)

619



VCCIO = 3.0 V ± 5% (4)

622



VCCIO = 2.5 V ± 5% (4)

625



VCCIO = 1.8 V ± 5% (4)

735



VCCIO = 1.5 V ± 5% (4)

112



Notes to Table 1–12:

(1) All I/O pins have an option to enable weak pull

-up except the 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.

(3) R_PU = (VCCIO –VI)/IR_PU

Minimum condition: –40°C; VCCIO = VCC + 5%, VI = VCC + 5% – 50 mV;

Typical condition: 25°C; VCCIO = VCC, VI = 0 V;

Maximum condition: 100°C; VCCIO = VCC – 5%, VI = 0 V; in which VI refers to the input voltage at the I/O pin.

(4) R_PD = VI/IR_PD

Minimum condition: –40°C; VCCIO = VCC + 5%, VI = 50 mV;

Typical condition: 25°C; VCCIO = VCC, VI = VCC –5%;

Maximum condition: 100°C; VCCIO = VCC – 5%, VI = VCC – 5%; in which VI refers to the input voltage at the I/O pin.

Table 1–13. Hot

-Socketing Specifications for Cyclone IV Devices

Symbol

Parameter

Maximum

IIOPIN(DC)

DC current per I/O pin

300

A

IIOPIN(AC)

AC current per I/O pin

8 mA (1)

IXCVRTX(DC)

DC current per transceiver TX pin

100 mA

IXCVRRX(DC)

DC current per transceiver RX pin

50 mA

Note to Table 1–13:

(1) The I/O ramp rate is 10 ns or more. For ramp rates faster than 10 ns, |IIOPIN| = C dv/dt, in which C is the I/O pin

capacitance and dv/dt is the slew rate.

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