1.5-VLVCMOS datasheet(11/34 Pages) ALTERA

11 / 34 page

Chapter 1: Cyclone III Device Datasheet

1–11

Electrical Characteristics

July 2012

Altera Corporation

Cyclone III Device Handbook

Volume 2

Table 1–14. Cyclone III Devices Single-Ended SSTL and HSTL I/O Reference Voltage Specifications (1)

I/O

Standard

VCCIO (V)

VREF (V)

VTT (V) (2)

Min

Typ

Max

Min

Typ

Max

Min

Typ

Max

SSTL-2

Class I, II

2.375

2.5

2.625

1.19

1.25

1.31

VREF –

0.04

VREF

VREF +

0.04

SSTL-18

Class I, II

1.7

1.8

1.9

0.833

0.9

0.969

VREF –

0.04

VREF

VREF +

0.04

HSTL-18

Class I, II

1.71

1.8

1.89

0.85

0.9

0.95

0.85

0.9

0.95

HSTL-15

Class I, II

1.425

1.5

1.575

0.71

0.75

0.79

0.71

0.75

0.79

HSTL-12

Class I, II

1.14

1.2

1.26

0.48 * VCCIO (3)

0.5 * VCCIO (3)

0.52 * VCCIO (3)

—

0.5 *

VCCIO

—

0.47 * VCCIO (4)

0.5 * VCCIO (4)

0.53 * VCCIO (4)

Notes to Table 1–14:

(1) For an explanation of terms used in Table 1–14, refer to “Glossary” on page 1–27.

(2) VTT of transmitting device must track VREF of the receiving device.

(3) Value shown refers to DC input reference voltage, VREF(DC).

(4) Value shown refers to AC input reference voltage, VREF(AC).

Table 1–15. Cyclone III Devices Single-Ended SSTL and HSTL I/O Standards Signal Specifications

I/O

Standard

VIL(DC) (V)

VIH(DC) (V)

VIL(AC) (V)

VIH(AC) (V)

VOL (V)

VOH (V)

IOL

(mA)

IOH

(mA)

Min

Max

Min

Max

Min

Max

Min

Max

Min

SSTL-2

Class I

—

VREF –

0.18

VREF +

0.18

——

VREF –

0.35

VREF +

0.35

—

VTT –

0.57

VTT +

0.57

8.1

–8.1

SSTL-2

Class II

—

VREF –

0.18

VREF +

0.18

——

VREF –

0.35

VREF +

0.35

—

VTT –

0.76

VTT +

0.76

16.4

–16.4

SSTL-18

Class I

—

VREF –

0.125

VREF +

0.125

——

VREF –

0.25

VREF +

0.25

—

VTT –

0.475

VTT +

0.475

6.7

–6.7

SSTL-18

Class II

—

VREF –

0.125

VREF +

0.125

——

VREF –

0.25

VREF +

0.25

—0.28

VCCIO –

0.28

13.4

–13.4

HSTL-18

Class I

—

VREF –

0.1

VREF +

0.1

——

VREF –

0.2

VREF +

0.2

—0.4

VCCIO –

0.4

8–8

HSTL-18

Class II

—

VREF –

0.1

VREF +

0.1

——

VREF –

0.2

VREF +

0.2

—0.4

VCCIO –

0.4

–16

HSTL-15

Class I

—

VREF –

0.1

VREF +

0.1

——

VREF –

0.2

VREF +

0.2

—0.4

VCCIO –

0.4

8–8

HSTL-15

Class II

—

VREF –

0.1

VREF +

0.1

——

VREF –

0.2

VREF +

0.2

—0.4

VCCIO –

0.4

–16

HSTL-12

Class I

–0.15

VREF –

0.08

VREF +

0.08

VCCIO + 0.15 –0.24

VREF –

0.15

VREF +

0.15

VCCIO +

0.24

0.25 ×

VCCIO

0.75 ×

VCCIO

8–8

HSTL-12

Class II

–0.15

VREF –

0.08

VREF +

0.08

VCCIO + 0.15 –0.24

VREF –

0.15

VREF +

0.15

VCCIO +

0.24

0.25 ×

VCCIO

0.75 ×

VCCIO

–14

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