EP4CE6E22C6 Altera Corporation, EP4CE6E22C6 Datasheet - Page 10

• Manufacturer Part Number: EP4CE6E22C6
• Description: IC CYCLONE IV FPGA 6K 144EQFP
• Manufacturer: Altera Corporation
• Series: CYCLONE® IV Er

Specifications of EP4CE6E22C6

• Number Of Logic Elements/cells: 6272
• Number Of Labs/clbs: 392
• Total Ram Bits: 276480
• Number Of I /o: 91
• Number Of Gates: -
• Voltage - Supply: 1.15 V ~ 1.25 V
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 144-LQFP Exposed Pad
• Lead Free Status: Contains lead
• Rohs Status: RoHS non-compliant

1–10
Table 1–11. Pin Capacitance for Cyclone IV Devices —Preliminary
Cyclone IV Device Handbook,
Volume 3
C
C
C
C
C
C
C
Notes to
(1) When you use the VREF pin as a regular input or output, you can expect a reduced performance of toggle rate and t
(2) C
(1)
(1)
Symbol
IOTB
IOLR
LVDSLR
VREFLR
VREFTB
CLKTB
CLKLR
capacitance.
VREFTB
Table
for the EP4CE22 device is 30 pF.
Input capacitance on top and bottom I/O pins
Input capacitance on right I/O pins
Input capacitance on right I/O pins with dedicated LVDS output
Input capacitance on right dual
V
Input capacitance on top and bottom dual
used as V
Input capacitance on top and bottom dedicated clock input pins
Input capacitance on right dedicated clock input pins
REF
1–11:
or user I/O pin
REF
Example 1–1
3.0 V to 85°C at 3.15 V.
Example 1–1. Impedance Change
Because R
Because R
Pin Capacitance
Table 1–11
or user I/O pin
R
R
MF
MF
MF = 0.963 × 1.157 = 1.114
R
final
V
T
V
T
= (85 – 25) × 0.262 = 15.72
= 15.72/100 + 1 = 1.157
= (3.15 – 3) × 1000 × –0.026 = –3.83
= 1 / (3.83/100 + 1) = 0.963
= 50 × 1.114 = 55.71 
V
T
lists the pin capacitance for Cyclone IV devices.
is positive,
is negative,
shows how to calculate the change of 50-I/O impedance from 25°C at
Parameter
- purpose VREF pin when used as
- purpose VREF pin when
Quad Flat
Typical –
(QFP)
23
Pack
21
7
7
8
7
6
(2)
Chapter 1: Cyclone IV Device Datasheet
Quad Flat
Typical –
No Leads
November 2011 Altera Corporation
(QFN)
21
23
7
7
8
7
6
CO
because of higher pin
Typical –
Fineline
(FBGA)
Operating Conditions
BGA
21
23
6
5
7
6
5
Unit
pF
pF
pF
pF
pF
pF
pF