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EP3C25F780C8 Datasheet(PDF) 5 Page - Altera Corporation |
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EP3C25F780C8 Datasheet(HTML) 5 Page - Altera Corporation |
5 / 34 page Chapter 1: Cyclone III Device Datasheet 1–5 Electrical Characteristics July 2012 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. f For more information about power estimation tools, refer to the PowerPlay Early Power Estimator User Guide and the PowerPlay Power Analysis chapter in the Quartus II Handbook. Bus Hold Bus hold retains the last valid logic state after the source driving it either enters the high impedance state or is removed. Each I/O pin has an option to enable bus hold in user mode. Bus hold is always disabled in configuration mode. Table 1–5 lists bus hold specifications for Cyclone III devices. Table 1–4. Cyclone III Devices I/O Pin Leakage Current (1), (2) Symbol Parameter Conditions Min Typ Max Unit II Input pin leakage current VI = 0 V to VCCIOMAX –10 — 10 A IOZ Tristated I/O pin leakage current VO = 0 V to VCCIOMAX –10 — 10 A Notes to Table 1–4: (1) This value is specified for normal device operation. The value varies during device power-up. This applies for all VCCIO settings (3.3, 3.0, 2.5, 1.8, 1.5, and 1.2 V). (2) 10 A I/O leakage current limit is applicable when the internal clamping diode is off. A higher current can be the observed when the diode is on. Table 1–5. Cyclone III Devices Bus Hold Parameter (Part 1 of 2) (1) Parameter Condition VCCIO (V) Unit 1.2 1.5 1.8 2.5 3.0 3.3 Min Max Min Max Min Max Min Max Min Max Min Max Bus-hold low, sustaining current VIN > VIL (maximum) 8 — 12 — 30—50—70 — 70 — A Bus-hold high, sustaining current VIN < VIL (minimum) –8 — –12 — –30 — –50 — –70 — –70 — A |
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