EP4CE15F23C6N Datasheet, PDF (12/42 Pages) Altera Corporation – This section lists the I/O leakage current, pin capacitance, on-chip termination (OCT) tolerance, and bus hold specifications for Cyclone IV devices.

1–12
Chapter 1: Cyclone IV Device Datasheet
Operating Conditions
Schmitt Trigger Input
Cyclone IV devices support Schmitt trigger input on the TDI, TMS, TCK, nSTATUS,
nCONFIG, nCE, CONF_DONE, and DCLK pins. A Schmitt trigger feature introduces
hysteresis to the input signal for improved noise immunity, especially for signals with
slow edge rate. Table 1–14 lists the hysteresis specifications across the supported
V_CCIO range for Schmitt trigger inputs in Cyclone IV devices.
Table 1–14. Hysteresis Specifications for Schmitt Trigger Input in Cyclone IV Devices
Symbol
Parameter
Conditions (V)
Minimum
Unit
V_SCHMITT
Hysteresis for Schmitt trigger
input
V_CCIO = 3.3
V_CCIO = 2.5
V_CCIO = 1.8
V_CCIO = 1.5
200
mV
200
mV
140
mV
110
mV
I/O Standard Specifications
The following tables list input voltage sensitivities (V_IH and V_IL), output voltage (V_OH
and V_OL), and current drive characteristics (I_OH and I_OL), for various I/O standards
supported by Cyclone IV devices. Table 1–15 through Table 1–20 provide the I/O
standard specifications for Cyclone IV devices.
Table 1–15. Single-Ended I/O Standard Specifications for Cyclone IV Devices ^{(1), (2)}
I/O Standard
V_CCIO (V)
Min Typ Max
V_IL (V)
Min Max
V_IH (V)
Min
Max
V_OL (V)
Max
V_OH (V)
Min
I_OL
(mA)
(4)
I_OH
(mA)
(4)
3.3-V LVTTL ⁽³⁾ 3.135 3.3 3.465 — 0.8
1.7
3.6
0.45
2.4
4
–4
3.3-V LVCMOS ⁽³⁾ 3.135 3.3 3.465 — 0.8
1.7
3.6
0.2
V_CCIO – 0.2 2
–2
3.0-V LVTTL ⁽³⁾
2.85 3.0 3.15 –0.3 0.8
1.7 V_CCIO + 0.3 0.45
2.4
4
–4
3.0-V LVCMOS ⁽³⁾ 2.85 3.0 3.15 –0.3 0.8
1.7 V_CCIO + 0.3
0.2
V_CCIO – 0.2 0.1 –0.1
2.5 V ⁽³⁾
2.375 2.5 2.625 –0.3 0.7
1.7 V_CCIO + 0.3
0.4
2.0
1
–1
1.8 V
1.71
1.8
1.89
–0.3
0.35 x
V_CCIO
0.65 x
V_CCIO
2.25
0.45
V_CCIO –
0.45
2
–2
1.5 V
1.425 1.5
1.575
–0.3
0.35 x
V_CCIO
0.65 x
V_CCIO
V_CCIO + 0.3
0.25 x
V_CCIO
0.75 x
V_CCIO
2
–2
1.2 V
1.14
1.2
1.26
–0.3
0.35 x
V_CCIO
0.65 x
V_CCIO
V_CCIO + 0.3
0.25 x
V_CCIO
0.75 x
V_CCIO
2
–2
3.0-V PCI
2.85
3.0
3.15
—
0.3 x
V_CCIO
0.5 x
V_CCIO
V_CCIO + 0.3 0.1 x V_CCIO 0.9 x V_CCIO
1.5
–0.5
3.0-V PCI-X
2.85
3.0
3.15
—
0.35 x
V_CCIO
0.5 x
V_CCIO
V_CCIO + 0.3 0.1 x V_CCIO 0.9 x V_CCIO
1.5
–0.5
Notes to Table 1–15:
(1) For voltage-referenced receiver input waveform and explanation of terms used in Table 1–15, refer to “Glossary” on page 1–37.
(2) AC load CL = 10 pF
(3) For more information about interfacing Cyclone IV devices with 3.3/3.0/2.5-V LVTTL/LVCMOS I/O standards, refer to AN 447: Interfacing Cyclone III
and Cyclone IV Devices with 3.3/3.0/2.5-V LVTTL/LVCMOS I/O Systems.
(4) To meet the IOL and IOH specifications, you must set the current strength settings accordingly. For example, to meet the 3.3-V LVTTL specification (4
mA), set the current strength settings to 4 mA or higher. Setting at lower current strength may not meet the IOL and IOH specifications in the handbook.
Cyclone IV Device Handbook,
Volume 3
December 2013 Altera Corporation