Chapter 1: Cyclone III Device Data Sheet

1–5

Electrical Characteristics

© January 2010

Altera Corporation

Cyclone III Device Handbook, Volume 2

DC Characteristics

This section lists the I/O leakage current, pin capacitance, on-chip termination (OCT)

tolerance, and bus hold specifications for Cyclone III devices.

Supply Current

Standby current is the current the device draws after the device is configured with no

inputs or outputs toggling and no activity in the device. Use the Excel-based early

power estimator (EPE) to get the supply current estimates for your design because

these currents vary largely with the resources used. Table 1–4 lists I/O pin leakage

current for Cyclone III devices.

T

J

Operating junction temperature

For commercial use

0

—

85

°C

For industrial use

–40

—

100

°C

For extended temperature

(5)

–40

—

125

°C

For automotive use

–40

—

125

°C

t

RAM P

Power supply ramp time

Standard power-on reset

(POR) (6)

50 µs

—

50 ms

—

Fast POR (7)

50 µs

—

3 ms

—

I

Diode

Magnitude of DC current across

PCI-clamp diode when enabled

——

—

10

mA

Notes to Table 1–3:

must be powered up and powered down at the same time.

(5) The I7 devices support extended operating junction temperature up to 125°C (usual range is –40°C to 100°C). When using I7 devices at the

devices meet all C8 timing specifications when I7 devices operate beyond 100°C and up to 125°C.

(6) POR time for Standard POR ranges between 50–200 ms. Each individual power supply should reach the recommended operating range within

50 ms.

(7) POR time for Fast POR ranges between 3–9 ms. Each individual power supply should reach the recommended operating range within 3 ms.

Table 1–3. Cyclone III Devices Recommended Operating Conditions

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Table 1–4. Cyclone III Devices I/O Pin Leakage Current (Note 1), (2)

(Part 1 of 2)

Symbol

Parameter

Conditions

Device

Min

Typ

Max

Unit

I

I

Input pin leakage current

V

CCIOMAX

—–10

—

10

μA

I

OZ

Tristated I/O pin leakage

current

V

CCIOMAX

—–10

—

10

μA