SN74AVC8T245DGVR_技术文档

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SCES517E − DECEMBER 2003 − REVISED OCTOBER 2004

D

Control Inputs V /V Levels Are

D

Max Data Rates:

− 170 Mbps (1.2 V 3 (V

− 320 Mbps (1.8 V 3 (V

IH IL

Referenced to V

Voltage

or V

) 3 3.3 V)

CCA

CCB

V

Isolation Feature − If Either V

Input

CC

Is at GND, All I/O Ports Are in the

High-Impedance State

D

Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

D

I

Supports Partial-Power-Down Mode

ESD Protection Exceeds JESD 22

− 2000-V Human-Body Model (A114-A)

− 200-V Machine Model (A115-A)

off

Operation

Fully Configurable Dual-Rail Design Allows

Each Port to Operate Over the Full 1.4-V to

3.6-V Power-Supply Range

− 1000-V Charged-Device Model (C101)

D

I/Os Are 4.6-V Tolerant

DGV OR PW PACKAGE

(TOP VIEW)

RHL PACKAGE

(TOP VIEW)

1

24

23

22

21

20

19

18

17

16

15

14

13

V

CCA

DIR

CCB

2

1

24

3

A1

A2

A3

A4

A5

A6

A7

A8

OE

B1

B2

B3

B4

B5

B6

B7

B8

GND

23

22

21

20

19

18

17

16

15

14

2

V

CCB

DIR

A1

A2

A3

A4

A5

A6

A7

A8

4

3

OE

B1

B2

B3

B4

B5

B6

B7

B8

5

4

6

5

7

6

8

7

9

8

10

11

12

9

GND

10

11

GND

12

13

description/ordering information

This 8-bit noninverting bus transceiver uses two separate configurable power-supply rails. The SN74AVC8T245

is optimized to operate with V /V set at 1.4 V to 3.6 V. It is operational with V /V as low as 1.2 V.

CCA CCB

CCA CCA

CCA CCB

The A port is designed to track V

. V

accepts any supply voltage from 1.2 V to 3.6 V. The B port is designed

to track V

. V

accepts any supply voltage from 1.2 V to 3.6 V. This allows for universal low-voltage

bidirectional translation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes.

CCB CCB

ORDERING INFORMATION

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

†

PACKAGE

T

A

QFN − RHL

Tape and reel SN74AVC8T245RHLR

Tube SN74AVC8T245PW

WE245

−40°C to 85°C

TSSOP − PW

TVSOP − DGV

WE245

Tape and reel SN74AVC8T245PWR

Tape and reel SN74AVC8T245DGVR

†

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines

are available at www.ti.com/sc/package.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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Copyright  2004, Texas Instruments Incorporated

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1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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ꢕꢍ ꢈ ꢖ ꢆ ꢗꢁ ꢘꢍ ꢙꢏ ꢓ ꢄꢌꢐ ꢔ ꢅ ꢗꢐꢈꢄꢙ ꢔ ꢈꢓ ꢄꢁ ꢀꢐ ꢄꢈ ꢍꢗ ꢁ ꢄꢁꢎ ꢚ ꢋꢀꢈꢄꢈ ꢔ ꢗ ꢏꢈ ꢑꢏꢈ ꢀ

SCES517E − DECEMBER 2003 − REVISED OCTOBER 2004

description/ordering information (continued)

The SN74AVC8T245 is designed for asynchronous communication between data buses. The device transmits

data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the

direction-control (DIR) input. The output-enable (OE) input can be used to disable the outputs so the buses are

effectively isolated.

The SN74AVC8T245 is designed so the control pins (DIR and OE) are supplied by V

.

CCA

The SN74AVC8T245 solution is compatible with a single-supply system and can be replaced later with a ’245

function, with minimal printed circuit board redesign.

This device is fully specified for partial-power-down applications using I . The I circuitry disables the outputs,

off

preventing damaging current backflow through the device when it is powered down.

The V isolation feature ensures that if either V input is at GND, both ports are in the high-impedance state.

CC

To ensure the high-impedance state during power up or power down, OE shall be tied to V

resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

through a pullup

CC

FUNCTION TABLE

(each 8-bit section)

INPUTS

OPERATION

OE

L

DIR

L

B data to A bus

A data to B bus

All outputs Hi-Z

L

H

X

logic diagram (positive logic)

2

3

DIR

22

21

OE

B1

A1

To Seven Other Channels

2

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SCES517E − DECEMBER 2003 − REVISED OCTOBER 2004

†

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Supply voltage range, V

and V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 4.6 V

CCA

CCB

Input voltage range, V (see Note 1): I/O ports (A port) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 4.6 V

I

I/O ports (B port) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 4.6 V

Control inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 4.6 V

Voltage range applied to any output in the high-impedance or power-off state, V

O

(see Note 1): A port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 4.6 V

B port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 4.6 V

Voltage range applied to any output in the high or low state, V

O

(see Notes 1 and 2): A port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to V

B port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to V

+ 0.5 V

CCA

CCB

Input clamp current, I (V < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −50 mA

IK

OK

I

Output clamp current, I

(V < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −50 mA

O

Continuous output current, I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA

Continuous current through V

O

, V

, or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 mA

CCA CCB

Package thermal impedance, θ (see Note 3):DGV package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86°C/W

JA

PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88°C/W

RHL package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C

Storage temperature range, T

stg

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES: 1. The input voltage and output negative-voltage ratings may be exceeded if the input and output current ratings are observed.

2. The output positive-voltage rating may be exceeded up to 4.6 V maximum if the output current rating is observed.

3. The package thermal impedance is calculated in accordance with JESD 51-7.

3

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ꢑꢏꢈ ꢀ

SCES517E − DECEMBER 2003 − REVISED OCTOBER 2004

recommended operating conditions (see Notes 4 through 6)

V

CCI

V

CCO

MIN

1.2

MAX

3.6

UNIT

V

Supply voltage

CCA

1.2

3.6

V

CCB

1.2 V to 1.95 V

1.95 V to 2.7 V

2.7 V to 3.6 V

1.2 V to 1.95 V

1.95 V to 2.7 V

2.7 V to 3.6 V

1.2 V to 1.95 V

1.95 V to 2.7 V

2.7 V to 3.6 V

1.2 V to 1.95 V

1.95 V to 2.7 V

2.7 V to 3.6 V

V

× 0.65

1.6

CCI

High-level

input voltage

V

IH

V

IL

V

IH

V

IL

Data inputs

V

2

V

× 0.35

CCI

Low-level

input voltage

0.7

0.8

V

CCA

× 0.65

1.6

High-level

input voltage

DIR

(referenced to V

)

CCA

2

V

CCA

× 0.35

0.7

Low-level

input voltage

DIR

(referenced to V

CCA

0.8

V

Input voltage

0

3.6

V

I

Active state

3-state

V

CCO

Output voltage

O

3.6

−3

−6

−8

−9

−12

3

1.2 V

1.4 V to 1.6 V

1.65 V to 1.95 V

2.3 V to 2.7 V

3 V to 3.6 V

1.2 V

I

High-level output current

Low-level output current

mA

OH

1.4 V to 1.6 V

1.65 V to 1.95 V

2.3 V to 2.7 V

3 V to 3.6 V

6

8

I

OL

9

12

5

∆t/∆v

Input transition rise or fall rate

Operating free-air temperature

ns/V

T

A

−40

85

°C

NOTES: 4. V

is the V

associated with the data input port.

associated with the output port.

6. All unused data inputs of the device must be held at V

CCI

CC

5.

V

is the V

CC

CCO

or GND to ensure proper device operation. Refer to the TI application report,

CCI

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

4

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SCES517E − DECEMBER 2003 − REVISED OCTOBER 2004

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted) (see Notes 7 and 8)

T

A

= 25°C

−40°C to 85°C

MIN MAX

V − 0.2 V

CCO

PARAMETER

TEST CONDITIONS

UNIT

V

CCB

CCA

MIN

TYP

MAX

I

= −100 µA

= −3 mA

= −6 mA

1.2 V to 3.6 V 1.2 V to 3.6 V

OH

OL

1.2 V

1.4 V

1.65 V

2.3 V

3 V

1.2 V

1.4 V

1.65 V

2.3 V

3 V

0.95

1.05

1.2

V

OH

V = V

I IH

V

= −8 mA

= −9 mA

= −12 mA

= 100 µA

= 3 mA

1.75

2.3

1.2 V to 3.6 V 1.2 V to 3.6 V

0.2

1.2 V

1.4 V

1.65 V

2.3 V

3 V

1.2 V

1.4 V

1.65 V

2.3 V

3 V

0.15

= 6 mA

0.35

0.45

0.55

0.7

V

OL

V = V

I IL

V

= 8 mA

= 9 mA

= 12 mA

Control

inputs

I

V = V

CCA

or GND

1.2 V to 3.6 V 1.2 V to 3.6 V

0.025

0.1

0.25

1

5

µA

I

A or B

port

0 V

0 to 3.6 V

3.6 V

0 to 3.6 V

0 V

V or V = 0 to 3.6 V

off

I

O

A or B

port

0.1

1

V

= V or GND,

CCO

CCI

A or B

port

O

†

OE = V

IH

3.6 V

0.5

2.5

µA

I

OZ

V = V

I

or GND

1.2 V to 3.6 V 1.2 V to 3.6 V

15

−2

15

−2

25

0 V

3.6 V

0 V

V = V

or GND

I

O

= 0

CCA

I

CCI

3.6 V

1.2 V to 3.6 V 1.2 V to 3.6 V

0 V

3.6 V

0 V

I

V = V

or GND

I

= 0

µA

CCB

I

CCI

O

3.6 V

+ I

V = V

1.2 V to 3.6 V 1.2 V to 3.6 V

µA

CCA CCB

Control

I

CCI

O

C

V = 3.3 V or GND

I

3.3 V

3.5

6

4.5

7

pF

i

inputs

A or B

port

C

V

O

= 3.3 V or GND

pF

io

†

For I/O ports, the parameter I

includes the input leakage current.

associated with the output port.

OZ

NOTES: 7. V

is the V

CC

CCO

is the V

8.

V

associated with the input port.

CC

CCI

5

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SCES517E − DECEMBER 2003 − REVISED OCTOBER 2004

switching characteristics over recommended operating free-air temperature range,

= 1.2 V (see Figure 10)

V

CCA

V

= 1.2 V

V

= 1.5 V

V

= 1.8 V

V

= 2.5 V

V

= 3.3 V

FROM

(INPUT)

TO

(OUTPUT)

CCB

TYP

3.1

CCB

TYP

2.6

CCB

TYP

2.5

CCB

TYP

CCB

TYP

3.5

PARAMETER

UNIT

ns

t

3

PLH

PHL

PLH

PHL

PZH

PZL

PZH

PZL

PHZ

PLZ

PHZ

PLZ

A

B

A

B

A

B

t

3.1

5.3

5.1

4.8

4.7

2.6

2.7

5.3

4

2.5

5.3

3.5

4.8

4.1

3.5

2.3

5.3

3.1

4.8

5.1

2.4

5.3

3.2

4.8

4.3

B

ns

OE

ns

4

4.8

4

ns

4

switching characteristics over recommended operating free-air temperature range,

= 1.5 V 0.1 V (see Figure 10)

V

CCA

V

= 1.5 V

0.1 V

V

= 1.8 V

0.15 V

V

= 2.5 V

0.2 V

V

= 3.3 V

CCB

0.3 V

V

= 1.2 V

CCB

TYP

2.7

FROM

(INPUT)

TO

(OUTPUT)

PARAMETER

UNIT

MIN

0.5

1.1

0.5

MAX

5.4

8.7

7.6

8.6

8.4

MIN

0.5

1.1

0.5

MAX

4.6

5.1

8.7

7.1

8.6

7.6

MIN

0.5

1.1

1

MAX

4.9

4.7

8.7

5.6

8.6

7.2

MIN

MAX

6.8

4.5

8.7

5.2

8.6

7.8

t

0.5

1.1

1

PLH

PHL

PLH

PHL

PZH

PZL

PZH

PZL

PHZ

PLZ

PHZ

PLZ

A

B

A

B

A

B

ns

t

2.7

2.6

3.7

4.8

3.1

4.1

B

OE

1

0.5

6

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ꢀꢁ ꢂꢃ ꢄꢅ ꢆꢇ ꢈꢉ ꢃꢊ

ꢇ ꢋꢌꢍ ꢈ ꢎꢏꢄ ꢐꢋꢀ ꢏꢑꢑꢐꢒ ꢌꢏꢀ ꢈ ꢓꢄꢁꢀ ꢆꢔ ꢍ ꢅꢔ ꢓ

ꢕ ꢍ ꢈꢖ ꢆꢗ ꢁꢘ ꢍ ꢙꢏ ꢓ ꢄꢌꢐ ꢔ ꢅꢗ ꢐꢈꢄꢙ ꢔ ꢈ ꢓꢄꢁꢀ ꢐꢄꢈ ꢍꢗ ꢁ ꢄꢁꢎ ꢚ ꢋꢀꢈꢄꢈ ꢔ ꢗ ꢏꢈ ꢑꢏ ꢈꢀ

SCES517E − DECEMBER 2003 − REVISED OCTOBER 2004

switching characteristics over recommended operating free-air temperature range,

= 1.8 V 0.15 V (see Figure 10)

V

CCA

V

= 1.5 V

0.1 V

V

= 1.8 V

0.15 V

V

= 2.5 V

0.2 V

V

= 3.3 V

0.3 V

CCB

V

= 1.2 V

CCB

TYP

2.5

FROM

(INPUT)

TO

(OUTPUT)

PARAMETER

UNIT

MIN

0.5

1

MAX

5.1

4.6

6.8

8.2

7.1

7.8

MIN

0.5

1

MAX

4.4

6.8

6.7

7.1

6.9

MIN

0.5

1

MAX

4

MIN

0.5

1

MAX

3.9

3.7

6.8

4.5

7.1

5.8

t

PLH

PHL

PLH

PHL

PZH

PZL

PZH

PZL

PHZ

PLZ

PHZ

PLZ

A

B

A

B

A

B

ns

t

2.5

3

4

3.9

6.8

5.1

7.1

6

B

OE

3

1

4.6

2.8

3.9

1.1

0.5

1

0.5

1

0.5

6

switching characteristics over recommended operating free-air temperature range,

= 2.5 V 0.2 V (see Figure 10)

V

CCA

V

= 1.5 V

0.1 V

V

= 1.8 V

0.15 V

V

= 2.5 V

0.2 V

V

= 3.3 V

0.3 V

CCB

V

= 1.2 V

CCB

TYP

2.4

FROM

(INPUT)

TO

(OUTPUT)

PARAMETER

UNIT

MIN

0.5

1.1

0.5

MAX

4.7

4.9

4.8

7.9

5.1

7.1

MIN

0.5

MAX

3.9

4

MIN

0.5

MAX

3.1

4.8

4.6

5.1

MIN

0.5

MAX

2.8

2.9

4.8

4

t

PLH

PHL

PLH

PHL

PZH

PZL

PZH

PZL

PHZ

PLZ

PHZ

PLZ

A

B

A

B

A

B

ns

t

2.4

3

B

3

4

2.2

4.5

1.8

3.6

4.8

6.4

5.1

6.3

OE

4

5.1

3.9

7

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

ꢀ ꢁꢂ ꢃꢄꢅꢆ ꢇ ꢈ ꢉ ꢃꢊ

ꢇꢋ ꢌꢍ ꢈ ꢎ ꢏꢄ ꢐ ꢋꢀ ꢏꢑ ꢑꢐꢒ ꢌꢏ ꢀ ꢈꢓ ꢄꢁ ꢀꢆ ꢔꢍ ꢅ ꢔ ꢓ

ꢕꢍ ꢈ ꢖ ꢆ ꢗꢁ ꢘꢍ ꢙꢏ ꢓ ꢄꢌꢐ ꢔ ꢅ ꢗꢐꢈꢄꢙ ꢔ ꢈꢓ ꢄꢁ ꢀꢐ ꢄꢈ ꢍꢗ ꢁ ꢄꢁꢎ ꢚ ꢋꢀꢈꢄꢈ ꢔ ꢗ ꢏꢈ ꢑꢏꢈ ꢀ

SCES517E − DECEMBER 2003 − REVISED OCTOBER 2004

switching characteristics over recommended operating free-air temperature range,

= 3.3 V 0.3 V (see Figure 10)

V

CCA

V

= 1.5 V

0.1 V

V

= 1.8 V

0.15 V

V

= 2.5 V

0.2 V

V

= 3.3 V

0.3 V

CCB

V

= 1.2 V

CCB

TYP

2.3

FROM

(INPUT)

TO

(OUTPUT)

PARAMETER

UNIT

MIN

0.5

1.1

0.5

MAX

4.5

6.8

4

MIN

0.5

MAX

3.7

3.9

4

MIN

0.5

MAX

2.9

2.8

4

MIN

0.5

MAX

2.5

4

t

PLH

PHL

PLH

PHL

PZH

PZL

PZH

PZL

PHZ

PLZ

PHZ

PLZ

A

B

A

B

A

B

ns

t

2.3

3.5

2

B

OE

2

4

4.5

1.7

3.4

7.8

4

6.2

4

4.5

4

3.9

4

6.9

6

4.8

4.2

6

operating characteristics, T = 25°C

A

V

=

V

=

V

=

V

=

V

=

CCA

= 1.5 V

CCA

= 1.8 V

CCA

TEST

CONDITIONS

V

= 1.2 V

V

= 2.5 V

V

= 3.3 V

PARAMETER

CCB

TYP

CCB

UNIT

TYP

Outputs

Enabled

1

A to B

B to A

A to B

B to A

Outputs

Disabled

C

= 0,

L

†

pdA

C

f = 10 MHz,

t = t =1 ns

pF

Outputs

Enabled

r

f

12

1

12

1

12

1

13

1

14

1

Outputs

Disabled

Outputs

Enabled

12

1

12

1

12

1

13

1

14

1

Outputs

Disabled

C

= 0,

L

†

pdB

C

pF

f = 10 MHz,

t = t =1 ns

Outputs

Enabled

1

r

f

Outputs

Disabled

1

†

Power-dissipation capacitance per transceiver

8

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

ꢀꢁ ꢂꢃ ꢄꢅ ꢆꢇ ꢈꢉ ꢃꢊ

ꢇ ꢋꢌꢍ ꢈ ꢎꢏꢄ ꢐꢋꢀ ꢏꢑꢑꢐꢒ ꢌꢏꢀ ꢈ ꢓꢄꢁꢀ ꢆꢔ ꢍ ꢅꢔ ꢓ

ꢕ ꢍ ꢈꢖ ꢆꢗ ꢁꢘ ꢍ ꢙꢏ ꢓ ꢄꢌꢐ ꢔ ꢅꢗ ꢐꢈꢄꢙ ꢔ ꢈ ꢓꢄꢁꢀ ꢐꢄꢈ ꢍꢗ ꢁ ꢄꢁꢎ ꢚ ꢋꢀꢈꢄꢈ ꢔ ꢗ ꢏꢈ ꢑꢏ ꢈꢀ

SCES517E − DECEMBER 2003 − REVISED OCTOBER 2004

typical total static power consumption (I

+ I

)

CCA

CCB

Table 1

V

CCA

V

UNIT

CCB

0 V

0

1.2 V

<0.5

<1

1.5 V

<0.5

<1

1.8 V

<0.5

<1

2.5 V

<0.5

<1

3.3 V

<0.5

1

0 V

1.2 V

1.5 V

1.8 V

2.5 V

3.3 V

<0.5

<1

1

µA

<1

1

<1

1

<1

9

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

ꢀ ꢁꢂ ꢃꢄꢅꢆ ꢇ ꢈ ꢉ ꢃꢊ

ꢇꢋ ꢌꢍ ꢈ ꢎ ꢏꢄ ꢐ ꢋꢀ ꢏꢑ ꢑꢐꢒ ꢌꢏ ꢀ ꢈꢓ ꢄꢁ ꢀꢆ ꢔꢍ ꢅ ꢔ ꢓ

ꢕꢍ ꢈ ꢖ ꢆ ꢗꢁ ꢘꢍ ꢙꢏ ꢓ ꢄꢌꢐ ꢔ ꢅ ꢗꢐꢈꢄꢙ ꢔ ꢈꢓ ꢄꢁ ꢀꢐ ꢄꢈ ꢍꢗ ꢁ ꢄꢁꢎ ꢚ ꢋꢀꢈꢄꢈ ꢔ ꢗ ꢏꢈ ꢑꢏꢈ ꢀ

SCES517E − DECEMBER 2003 − REVISED OCTOBER 2004

TYPICAL CHARACTERISTICS

TYPICAL PROPAGATION DELAY (A to B) vs LOAD CAPACITANCE

T = 25°C, V

= 1.2 V

A

CCA

6

5

4

3

2

1

0

V

= 1.2 V

= 1.5 V

= 1.8 V

CCB

V

= 2.5 V

= 3.3 V

CCB

0

10

20

30

40

50

60

C

− pF

L

Figure 1

TYPICAL PROPAGATION DELAY (A to B) vs LOAD CAPACITANCE

T = 25°C, V

= 1.5 V

A

CCA

6

5

4

3

2

1

0

6

5

4

3

2

1

0

V

= 1.2 V

CCB

V

= 1.2 V

= 1.5 V

= 1.8 V

CCB

V

= 1.5 V

CCB

V

= 1.8 V

V

= 2.5 V

= 3.3 V

V

= 2.5 V

= 3.3 V

CCB

10

20

30

40

50

60

0

10

20

30

− pF

40

50

60

0

C

− pF

L

C

L

Figure 2

Figure 3

10

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ꢀꢁ ꢂꢃ ꢄꢅ ꢆꢇ ꢈꢉ ꢃꢊ

ꢇ ꢋꢌꢍ ꢈ ꢎꢏꢄ ꢐꢋꢀ ꢏꢑꢑꢐꢒ ꢌꢏꢀ ꢈ ꢓꢄꢁꢀ ꢆꢔ ꢍ ꢅꢔ ꢓ

ꢕ ꢍ ꢈꢖ ꢆꢗ ꢁꢘ ꢍ ꢙꢏ ꢓ ꢄꢌꢐ ꢔ ꢅꢗ ꢐꢈꢄꢙ ꢔ ꢈ ꢓꢄꢁꢀ ꢐꢄꢈ ꢍꢗ ꢁ ꢄꢁꢎ ꢚ ꢋꢀꢈꢄꢈ ꢔ ꢗ ꢏꢈ ꢑꢏ ꢈꢀ

SCES517E − DECEMBER 2003 − REVISED OCTOBER 2004

TYPICAL PROPAGATION DELAY (A to B) vs LOAD CAPACITANCE

T = 25°C, V = 1.8 V

A

CCA

6

5

4

3

2

1

0

6

V

= 1.2 V

= 1.5 V

= 1.8 V

V

= 1.2 V

= 1.5 V

= 1.8 V

CCB

5

4

3

2

1

0

V

= 2.5 V

= 3.3 V

V

= 2.5 V

= 3.3 V

CCB

10

20

30

− pF

40

50

60

0

10

20

30

40

50

60

0

C

− pF

L

Figure 4

Figure 5

TYPICAL PROPAGATION DELAY (A to B) vs LOAD CAPACITANCE

T = 25°C, V

= 2.5 V

A

CCA

6

5

4

3

2

1

0

V

= 1.2 V

= 1.5 V

= 1.8 V

V

= 1.2 V

= 1.5 V

= 1.8 V

CCB

V

5

4

3

2

1

0

V

= 2.5 V

= 3.3 V

V

= 2.5 V

= 3.3 V

CCB

10

20

30

− pF

40

50

60

10

20

30

− pF

40

50

60

0

C

L

Figure 7

Figure 6

11

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

ꢀ ꢁꢂ ꢃꢄꢅꢆ ꢇ ꢈ ꢉ ꢃꢊ

ꢇꢋ ꢌꢍ ꢈ ꢎ ꢏꢄ ꢐ ꢋꢀ ꢏꢑ ꢑꢐꢒ ꢌꢏ ꢀ ꢈꢓ ꢄꢁ ꢀꢆ ꢔꢍ ꢅ ꢔ ꢓ

ꢕꢍ ꢈ ꢖ ꢆ ꢗꢁ ꢘꢍ ꢙꢏ ꢓ ꢄꢌꢐ ꢔ ꢅ ꢗꢐꢈꢄꢙ ꢔ ꢈꢓ ꢄꢁ ꢀꢐ ꢄꢈ ꢍꢗ ꢁ ꢄꢁꢎ ꢚ ꢋꢀꢈꢄꢈ ꢔ ꢗ ꢏꢈ ꢑꢏꢈ ꢀ

SCES517E − DECEMBER 2003 − REVISED OCTOBER 2004

TYPICAL PROPAGATION DELAY (A to B) vs LOAD CAPACITANCE

T = 25°C, V

= 3.3 V

A

CCA

6

5

4

3

2

1

0

V

= 1.2 V

= 1.5 V

= 1.8 V

CCB

V

= 1.2 V

= 1.5 V

= 1.8 V

CCB

V

5

4

3

2

1

CCB

V

= 2.5 V

= 3.3 V

CCB

V

= 2.5 V

= 3.3 V

CCB

0

10

20

30

− pF

40

50

60

10

20

30

− pF

40

50

60

0

C

L

Figure 8

Figure 9

12

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

ꢀꢁ ꢂꢃ ꢄꢅ ꢆꢇ ꢈꢉ ꢃꢊ

ꢇ ꢋꢌꢍ ꢈ ꢎꢏꢄ ꢐꢋꢀ ꢏꢑꢑꢐꢒ ꢌꢏꢀ ꢈ ꢓꢄꢁꢀ ꢆꢔ ꢍ ꢅꢔ ꢓ

ꢕ

ꢍ

ꢈ

ꢖ

ꢆ

ꢗ

ꢁ

ꢘ

ꢍ

ꢙꢏ

ꢓ

ꢄ

ꢌ

ꢐ

ꢔ

ꢅ

ꢗ

ꢐ

ꢈ

ꢄ

ꢙ

ꢔ

ꢈ

ꢓ

ꢄ

ꢁ

ꢀ

ꢐ

ꢄꢈ

ꢍ

ꢗ

ꢁ

ꢄ

ꢁ

ꢎ

ꢚ

ꢋ

ꢀ

ꢈ

ꢄ

ꢈ

ꢔ

ꢗ

ꢏ

ꢈ

ꢑ

ꢏ

ꢈ

ꢀ

SCES517E − DECEMBER 2003 − REVISED OCTOBER 2004

PARAMETER MEASUREMENT INFORMATION

2 × V

CCO

TEST

S1

R

Open

GND

t

Open

L

pd

/t

From Output

Under Test

t

2 × V

CCO

GND

PLZ PZL

/t

PHZ PZH

t

C

L

R

L

(see Note A)

t

LOAD CIRCUIT

w

V

CCI

V /2

CCI

V /2

CCI

Input

V

TP

C

R

V

CCO

L

0 V

1.2 V

2 kΩ

0.1 V

15 pF

VOLTAGE WAVEFORMS

PULSE DURATION

1.5 V 0.1 V

1.8 V 0.15 V

2.5 V 0.2 V

3.3 V 0.3 V

0.15 V

0.3 V

V

CCA

Output

Control

(low-level

enabling)

V

CCA

/2

V

CCA

/2

0 V

t

PLZ

PZL

V

CCO

Output

Waveform 1

V

CCI

V

CCO

/2

Input

V /2

CCI

V /2

CCI

V

OL

+ V

TP

S1 at 2 × V

CCO

OL

0 V

(see Note B)

t

PZH

PHZ

t

PHL

PLH

Output

Waveform 2

S1 at GND

V

OH

V

OH

V

OH

− V

TP

V

CCO

Output

V

CCO

/2

V

/2

CCO

(see Note B)

0 V

V

OL

VOLTAGE WAVEFORMS

PROPAGATION DELAY TIMES

VOLTAGE WAVEFORMS

ENABLE AND DISABLE TIMES

NOTES: A.

C

includes probe and jig capacitance.

L

B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.

Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.

C. All input pulses are supplied by generators having the following characteristics: PRRv10 MHz, Z = 50 Ω, dv/dt ≥ 1 V/ns.

O

D. The outputs are measured one at a time, with one transition per measurement.

E.

F.

G.

H.

I.

t

V

and t

PHL

are the same as t

.

dis

PLZ

PZL

PLH

PHZ

PZH

are the same as t

are the same as t .

pd

.

en

is the V associated with the input port.

CCI

CC

is the V

CC

associated with the output port.

CCO

Figure 10. Load Circuit and Voltage Waveforms

13

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

MECHANICAL DATA

MPDS006C – FEBRUARY 1996 – REVISED AUGUST 2000

DGV (R-PDSO-G**)

PLASTIC SMALL-OUTLINE

24 PINS SHOWN

0,23

0,13

M

0,07

0,40

24

13

0,16 NOM

4,50

4,30

6,60

6,20

Gage Plane

0,25

0°–ā8°

0,75

1

12

0,50

A

Seating Plane

0,08

0,15

0,05

1,20 MAX

PINS **

14

16

20

24

38

48

56

DIM

A MAX

A MIN

3,70

3,50

3,70

3,50

5,10

4,90

5,10

4,90

7,90

7,70

9,80

9,60

11,40

11,20

4073251/E 08/00

NOTES: A. All linear dimensions are in millimeters.

B. This drawing is subject to change without notice.

C. Body dimensions do not include mold flash or protrusion, not to exceed 0,15 per side.

D. Falls within JEDEC: 24/48 Pins – MO-153

14/16/20/56 Pins – MO-194

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

MECHANICAL DATA

MTSS001C – JANUARY 1995 – REVISED FEBRUARY 1999

PW (R-PDSO-G**)

PLASTIC SMALL-OUTLINE PACKAGE

14 PINS SHOWN

0,30

0,19

M

0,10

0,65

14

8

0,15 NOM

4,50

4,30

6,60

6,20

Gage Plane

0,25

1

7

0°–8°

A

0,75

0,50

Seating Plane

0,10

0,15

0,05

1,20 MAX

PINS **

8

14

16

20

24

28

DIM

3,10

2,90

5,10

4,90

5,10

4,90

6,60

6,40

7,90

9,80

9,60

A MAX

A MIN

7,70

4040064/F 01/97

NOTES: A. All linear dimensions are in millimeters.

B. This drawing is subject to change without notice.

C. Body dimensions do not include mold flash or protrusion not to exceed 0,15.

D. Falls within JEDEC MO-153

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

IMPORTANT NOTICE

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amplifier.ti.com

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www.ti.com/automotive

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dsp.ti.com

Broadband

Digital Control

Military

www.ti.com/broadband

www.ti.com/digitalcontrol

www.ti.com/military

Interface

Logic

interface.ti.com

logic.ti.com

Power Mgmt

Microcontrollers

power.ti.com

Optical Networking

Security

www.ti.com/opticalnetwork

www.ti.com/security

www.ti.com/telephony

www.ti.com/video

microcontroller.ti.com

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Video & Imaging

Wireless

www.ti.com/wireless

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Post Office Box 655303 Dallas, Texas 75265


型号：	SN74AVC8T245DGVR
厂家：	TEXAS INSTRUMENTS
描述：	8 BIT DUAL SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS 可配置电压转换和三态输出的8位双电源总线收发器总线收发器输出元件
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SN74AVC8T245DGVR [TI]

相关型号：

SN74AVC8T245PW

SN74AVC8T245PWE4

SN74AVC8T245PWG4

SN74AVC8T245PWR

SN74AVC8T245PWRE4

SN74AVC8T245PWRG4

SN74AVC8T245QPWRQ1

SN74AVC8T245RGYR

SN74AVC8T245RHLR

SN74AVC8T245_07

SN74AVC8T245_10

SN74AVC8T245_101