SN74LVC245DB datasheet(5/22 Pages) TI

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Electrical Characteristics

(1) (2)

SN74LVCH8T245

8-BIT DUAL-SUPPLY BUS TRANSCEIVER

WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS

SCES637A – AUGUST 2005 – REVISED FEBRUARY 2007

over recommended operating free-air temperature range (unless otherwise noted)

PARAMETER

TEST CONDITIONS

VCCA

VCCB

MIN

TYP

MAX

MIN

MAX

UNIT

IOH = –100 µA,

VI = VIH

1.65 V to 4.5 V 1.65 V to 4.5 V

VCCO – 0.1

IOH = –4 mA,

VI = VIH

1.65 V

1.2

VOH

IOH = –8 mA,

VI = VIH

2.3 V

1.9

IOH = –24 mA,

VI = VIH

3 V

2.4

IOH = –32 mA,

VI = VIH

4.5 V

3.8

IOL = 100 µA,

VI = VIL

1.65 V to 4.5 V 1.65 V to 4.5 V

0.1

IOL = 4 mA,

VI = VIL

1.65 V

0.45

VOL

IOL = 8 mA,

VI = VIL

2.3 V

0.3

IOL = 24 mA,

VI = VIL

3 V

0.55

IOL = 32 mA,

VI = VIL

4.5 V

0.55

Control

VI = VCCA or GND

1.65 V to 5.5 V 1.65 V to 5.5 V

±0.5

±1

±2

µA

inputs

VI = 0.58 V

1.65 V

VI = 0.7 V

2.3 V

IBHL(3)

µA

VI = 0.8 V

3 V

VI = 0.1.35 V

4.5 V

100

VI = 1.07 V

1.65 V

–15

VI = 1.7 V

2.3 V

–45

IBHH(4)

µA

VI = 2 V

3 V

–75

VI = 3.15 V

4.5 V

–100

1.95 V

200

2.7 V

300

IBHLO(5)

VI = 0 to VCC

µA

3.6 V

500

5.5 V

900

1.95 V

–200

2.7 V

–300

IBHHO(6)

VI = 0 to VCC

µA

3.6 V

–500

5.5 V

–900

A port

0 V

0 to 5.5 V

±0.5

±1

±2

Ioff

VI or VO = 0 to 5.5 V

µA

B port

0 to 5.5 V

0 V

±0.5

±1

±2

A or B

OE = VIH

1.65 V to 5.5 V 1.65 V to 5.5 V

±1

±2

port

VO = VCCO or GND,

IOZ

µA

B port

VI = VCCI or GND

0 V

5.5 V

±1

±2

OE = don't

care

A port

5.5 V

0 V

±1

±2

1.65 V to 5.5 V 1.65 V to 5.5 V

ICCA

VI = VCCI or GND,

IO = 0

5 V

0 V

µA

0 V

5 V

–2

1.65 V to 5.5 V 1.65 V to 5.5 V

ICCB

VI = VCCI or GND,

IO = 0

5 V

0 V

–2

µA

0 V

5 V

ICCA + ICCB

VI = VCCI or GND,

IO = 0

1.65 V to 5.5 V 1.65 V to 5.5 V

µA

(1)

VCCO is the VCC associated with the output port.

(2)

VCCI is the VCC associated with the input port.

(3)

The bus-hold circuit can sink at least the minimum low sustaining current at VIL max. IBHL should be measured after lowering VIN to GND

and then raising it to VIL max.

(4)

The bus-hold circuit can source at least the minimum high sustaining current at VIH min. IBHH should be measured after raising VIN to

VCC and then lowering it to VIH min.

(5)

An external driver must source at least IBHLO to switch this node from low to high.

(6)

An external driver must sink at least IBHHO to switch this node from high to low.

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