SN74AVC20T245

20BIT DUALSUPPLY BUS TRANSCEIVER

WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3STATE OUTPUTS

SCES566F − MAY 2004 − REVISED APRIL 2005

4

POST OFFICE BOX 655303

recommended operating conditions (see Notes 4 through 8)

VCCI

VCCO

MIN

MAX

UNIT

VCCA

Supply voltage

1.2

3.6

V

VCCB

Supply voltage

1.2

3.6

V

High-level input

Data inputs

1.2 V to 1.95 V

VCCI × 0.65

VIH

High-level input

voltage

Data inputs

(see Note 7)

1.95 V to 2.7 V

1.6

V

VIH

voltage

(see Note 7)

2.7 V to 3.6 V

2

V

Low-level input

Data inputs

1.2 V to 1.95 V

VCCI × 0.35

VIL

Low-level input

voltage

Data inputs

(see Note 7)

1.95 V to 2.7 V

0.7

V

VIL

voltage

(see Note 7)

2.7 V to 3.6 V

0.8

V

High-level input

DIR

1.2 V to 1.95 V

VCCA × 0.65

VIH

High-level input

voltage

DIR

(referenced to VCCA)

1.95 V to 2.7 V

1.6

V

VIH

voltage

(referenced to VCCA)

(see Note 8)

2.7 V to 3.6 V

2

V

Low-level input

DIR

1.2 V to 1.95 V

VCCA × 0.35

VIL

Low-level input

voltage

DIR

(referenced to VCCA)

1.95 V to 2.7 V

0.7

V

VIL

voltage

(referenced to VCCA)

(see Note 8)

2.7 V to 3.6 V

0.8

V

VI

Input voltage

0

3.6

V

VO

Output voltage

Active state

0

VCCO

V

VO

Output voltage

3-state

0

3.6

V

1.2 V

−3

1.4 V to 1.6 V

−6

IOH

High-level output current

1.65 V to 1.95 V

−8

mA

IOH

High-level output current

2.3 V to 2.7 V

−9

mA

3 V to 3.6 V

−12

1.2 V

3

1.4 V to 1.6 V

6

IOL

Low-level output current

1.65 V to 1.95 V

8

mA

IOL

Low-level output current

2.3 V to 2.7 V

9

mA

3 V to 3.6 V

12

∆t/∆v

Input transition rise or fall rate

5

ns/V

TA

Operating free-air temperature

−40

85

°C

NOTES:

4. VCCI is the VCC associated with the data input port.

5. VCCO is the VCC associated with the output port.

6. All unused data inputs of the device must be held at VCCI or GND to ensure proper device operation. Refer to the TI application report,

Implications of Slow or Floating CMOS Inputs, literature number SCBA004.

7. For VCCI values not specified in the data sheet, VIH(min) = VCCI x 0.7 V, VIL(max) = VCCI x 0.3 V.

8. For VCCI values not specified in the data sheet, VIH(min) = VCCA x 0.7 V, VIL(max) = VCCA x 0.3 V.