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EP3C5E144C8N Datasheet, PDF (326/348 Pages) Altera Corporation – Ability to disable external JTAG port
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2–12
Chapter 2: Cyclone III LS Device Data Sheet
Electrical Characteristics
f For more information about receiver input and transmitter output waveforms, and for
other differential I/O standards, refer to the High-Speed Differential Interfaces in
Cyclone III Devices chapter.
Table 2–16. Cyclone III LS Devices Differential SSTL I/O Standard Specifications (1)
I/O Standard
VCCIO (V)
VSwing(DC)
(V)
VX(AC) (V)
VSwing(AC)
(V)
VOX(AC) (V)
Min Typ Max Min Max
Min
Typ Max Min Max Min Typ Max
SSTL-2
Class I, II
2.375
2.5 2.625 0.36 VCCIO VCCIO/2 – 0.2
—
VCCIO/2
+ 0.2
0.7
VCCI
O
VCCIO/2 –
0.125
—
VCCIO/2
+ 0.125
SSTL-18
Class I, II
1.7
1.8 1.90 0.25 VCCIO
VCCIO/2 –
0.175
—
VCCIO/2
+ 0.175
0.5
VCCI
O
VCCIO/2 –
0.125
—
VCCIO/2
+ 0.125
Note to Table 2–16:
(1) Differential SSTL requires a VREF input.
Table 2–17. Cyclone III LS Devices Differential HSTL I/O Standard Specifications (1)
I/O Standard
VCCIO (V)
Min Typ Max
VDIF(DC) (V)
Min Max
HSTL-18
Class I, II
1.71 1.8 1.89 0.2 —
HSTL-15
Class I, II
1.425 1.5 1.575 0.2 —
HSTL-12
Class I, II
1.14 1.2 1.26 0.16 VCCIO
Note to Table 2–17:
(1) Differential HSTL requires a VREF input.
VX(AC) (V)
Min Typ Max
0.85 — 0.95
VCM(DC) (V)
Min Typ Max
0.85 — 0.95
0.71
0.48 *
VCCIO
— 0.79 0.71 — 0.79
—
0.52 *
VCCIO
0.48 *
VCCIO
—
0.52 *
VCCIO
VDIF(AC) (V)
Min Max
0.4 —
0.4 —
0.3
0.48 *
VCCIO
Table 2–18. Differential I/O Standard Specifications (1) (Part 1 of 2)
I/O
Standard
VCCIO (V)
VID (mV)
Min Typ Max Min Max Min
VICM (V)
Condition
VOD (mV) (2)
Max Min Typ Max
VOS (V) (2)
Min Typ Max
LVPECL
(Row
I/Os) (3)
LVPECL
(Column
I/Os) (3)
LVDS
(Row
I/Os)
0 DMAX ≤ 500 Mbps 1.85
2.375
2.5 2.625 100
—
0.5
500 Mbps ≤ DMAX
≤ 700 Mbps
1.85
—
—
—
—
—
—
1 DMAX > 700 Mbps 1.6
0 DMAX ≤ 500 Mbps 1.85
2.375
2.5 2.625 100
—
0.5
500 Mbps ≤ DMAX
≤ 700 Mbps
1.85
—
—
—
—
—
—
1 DMAX > 700 Mbps 1.6
0 DMAX ≤ 500 Mbps 1.85
2.375
2.5 2.625 100
—
0.5
500 Mbps ≤ DMAX
≤ 700 Mbps
1.85 247 —
600 1.125 1.25 1.375
1 DMAX > 700 Mbps 1.6
Cyclone III Device Handbook
Volume 2
December 2011 Altera Corporation
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