EP3C80F780C8N datasheet(8/34 Pages) ALTERA

部件名	EP3C80F780C8N

功能描述	This chapter describes the electric characteristics, switching characteristics, and I/O timing for Cyclone짰 III devices. A glossary is also included for your reference.

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制造商	ALTERA [Altera Corporation]

网页	http://www.altera.com

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Chapter 1: Cyclone III Device Datasheet

Electrical Characteristics

Cyclone III Device Handbook

July 2012

Altera Corporation

Volume 2

Example 1–1 shows you the example to calculate the change of 50 I/O impedance

from 25°C at 3.0 V to 85°C at 3.15 V:

Pin Capacitance

Table 1–9 lists the pin capacitance for Cyclone III devices.

Example 1–1.

R

V = (3.15 – 3) × 1000 × –0.026 = –3.83

R

T = (85 – 25) × 0.262 = 15.72

Because

R

V is negative,

MFV = 1 / (3.83/100 + 1) = 0.963

Because

R

T is positive,

MFT = 15.72/100 + 1 = 1.157

MF = 0.963 × 1.157 = 1.114

Rfinal = 50 × 1.114 = 55.71 

Table 1–9. Cyclone III Devices Pin Capacitance

Symbol

Parameter

Typical –

QFP

Typical –

FBGA

Unit

CIOTB

Input capacitance on top/bottom I/O pins

7

6

pF

CIOLR

Input capacitance on left/right I/O pins

7

5

pF

CLVDSLR

Input capacitance on left/right I/O pins with dedicated

LVDS output

87

pF

CVREFLR

(1)

Input capacitance on left/right dual-purpose VREF pin

when used as VREF or user I/O pin

21

pF

CVREFTB

(1)

Input capacitance on top/bottom dual-purpose VREF pin

when used as VREF or user I/O pin

23 (2)

pF

CCLKTB

Input capacitance on top/bottom dedicated clock input

pins

76

pF

CCLKLR

Input capacitance on left/right dedicated clock input pins

6

5

pF

Notes to Table 1–9:

(1) When VREF pin is used as regular input or output, a reduced performance of toggle rate and tCO is expected due to

higher pin capacitance.

(2) CVREFTB for EP3C25 is 30 pF.

类似零件编号 - EP3C80F780C8N

制造商	部件名	数据表	功能描述
Altera Corporation	EP3C80F780C8	836Kb / 34P	The following sections provide information about the absolute maximum ratings, recommended operating conditions, DC characteristics, and other specifications for Cyclone IIIdevices

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