CV-51002
2015.12.04
20
Differential SSTL I/O Standards
VIL(DC) (V)
VIH(DC) (V)
VIL(AC) (V)
Max
VIH(AC) (V)
Min
VOL (V)
Max
VOH (V)
Min
(19)
IOL
I/O Standard
IOH(19) (mA)
(mA)
Min
Max
Min
Max
HSTL-15
Class II
—
VREF – 0.1
VREF + 0.1
—
VREF – 0.2
VREF + 0.2
0.4
VCCIO – 0.4
16
–16
HSTL-12
Class I
–0.15
–0.15
—
VREF – 0.08 VREF + 0.08 VCCIO + 0.15 VREF – 0.15 VREF + 0.15 0.25 × VCCIO 0.75 × VCCIO
VREF – 0.08 VREF + 0.08 VCCIO+ 0.15 VREF – 0.15 VREF + 0.15 0.25 × VCCIO 0.75 × VCCIO
8
–8
–16
—
HSTL-12
Class II
16
—
HSUL-12
VREF – 0.13 VREF + 0.13
—
VREF – 0.22 VREF + 0.22 0.1 × VCCIO 0.9 × VCCIO
Differential SSTL I/O Standards
Table 17: Differential SSTL I/O Standards for Cyclone V Devices
VCCIO (V)
Typ
VSWING(DC) (V)
VX(AC) (V)
VSWING(AC) (V)
I/O Standard
Min
Max
Min
Max
Min
Typ
Max
Min
Max
SSTL-2
2.375
2.5
2.625
0.3
0.25
0.2
VCCIO + 0.6
VCCIO/2 –
0.2
—
VCCIO/2 +
0.2
0.62
VCCIO + 0.6
Class I, II
SSTL-18
1.71
1.425
1.283
1.8
1.5
1.89
1.575
1.45
VCCIO + 0.6
VCCIO/2 –
0.175
—
—
VCCIO/2 +
0.175
0.5
VCCIO + 0.6
2(VIL(AC) – VREF
2(VIL(AC) – VREF)
Class I, II
(20)
SSTL-15
VCCIO/2 –
0.15
VCCIO/2 +
0.15
2(VIH(AC)
–
–
)
Class I, II
VREF)
(20)
SSTL-135
1.35
0.18
VCCIO/2 –
0.15
VCCIO/2
VCCIO/2 +
0.15
2(VIH(AC)
VREF
)
(19)
To meet the IOL and IOH specifications, you must set the current strength settings accordingly. For example, to meet the SSTL15CI specification (8
mA), you should set the current strength settings to 8 mA. Setting at lower current strength may not meet the IOL and IOH specifications in the
datasheet.
The maximum value for VSWING(DC) is not defined. However, each single-ended signal needs to be within the respective single-ended limits (VIH(DC)
and VIL(DC)).
(20)
Cyclone V Device Datasheet
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