74LVXC3245MTR_技术文档

74LVXC3245

OCTAL DUAL SUPPLY BUS TRANSCEIVER

■

HIGH SPEED:

t

= 8ns (MAX.) at T =25°C

PD

A

V

= 3.3V, V

= 5.0V

CCA

CCB

■

LOW POWER DISSIPATION:

= I = 5µA(MAX.) at T =25°C

I

CCA

CCB

A

LOW NOISE: V

=0.3V (TYP.) at

OLP

V

=3.3V

SOP

TSSOP

T & R

CCA

SYMMETRICAL OUTPUT IMPEDANCE:

|I | = I = 24mA (MIN)

OH

OL

Table 1: Order Codes

PACKAGE

BALANCED PROPAGATION DELAYS:

t

PLH

PHL

OPERATING VOLTAGE RANGE:

SOP

74LVXC3245MTR

74LVXC3245TTR

V

(OPR)=2.7Vto3.6V(1.2VDataRetention)

CCA

TSSOP

V

(OPR)=2.7Vto5.5V(1.2VDataRetention)

CCB

PIN AND FUNCTION COMPATIBLE WITH

74 SERIES C3245

IMPROVED LATCH-UP IMMUNITY

This IC is intended for two-way asynchronous

communication between data buses and the

direction of data transmission is determined by

DIR input. The enable input G can be used to

disable the device so that the buses are effectively

isolated.

■

DESCRIPTION

The 74LVXC3245 is

a dual supply 8 bit

configurable low voltage CMOS OCTAL BUS

TRANSCEIVER fabricated with sub-micron silicon

The A-port interfaces with the 3V bus, the B-port

with the 5V bus.

2

gate and double-layer metal wiring C MOS

technology. Designed for use as an interface

between a 3.3V bus and a 3.3V to 5V bus in a

mixed 3.3V/5V supply systems, it achieves high

speed operation while maintaining the CMOS low

power dissipation.

All inputs are equipped with protection circuits

against static discharge, giving them 2KV ESD

immunity and transient excess voltage.

Figure 1: Pin Connection And IEC Logic Symbols

Rev. 4

1/14

August 2004

74LVXC3245

Figure 2: Input And Output Equivalent Circuit

Table 2: Pin Description

PIN N°

SYMBOL

NAME AND FUNCTION

2

DIR

Directional Control

Data Inputs/Outputs

3, 4, 5, 6, 7,

8, 9, 10

A1 to A8

21, 20, 19,

18, 17, 16,

15, 14

B1 to B8

Data Inputs/Outputs

22

G

Output Enable Input

Ground (0V)

11, 12, 13

GND

NC

23

1

Not Connected

V

Positive Supply Voltage

CCA

24

Positive Supply Voltage

CCB

Table 3: Truth Table

INPUTS

FUNCTION

OUTPUT

G

DIR

A BUS

B BUS

L

H

X

OUTPUT

INPUT

Z

INPUT

OUTPUT

Z

A = B

B = A

Z

H

X : Don’t Care

Z : High Impedance

Table 4: Absolute Maximum Ratings

Symbol

Parameter

Value

Unit

V

Supply Voltage

-0.5 to +7.0

V

CCA

V

Supply Voltage

CCB

V

DC Input Voltage

DC I/O Voltage

-0.5 to V

+ 0.5

V

I

CCA

CCB

V

-0.5 to V

+ 0.5

V

I/OA

V

DC I/O Voltage

V

I/OB

I

DC Input Diode Current

DC Output Diode Current

DC Output Current

± 20

mA

mW

°C

IK

I

± 50

± 200

± 100

180

OK

I

OA

I

OB

I

DC V or Ground Current

CCA

CC

I

DC V or Ground Current

CCB

CC

P

Power Dissipation

d

T

Storage Temperature

Lead Temperature (10 sec)

-65 to +150

300

stg

T

L

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is

not implied

2/14

74LVXC3245

Table 5: Recommended Operating Conditions

Symbol

Parameter

Value

Unit

V

Supply Voltage (note 1)

Input Voltage

2.7 to 3.6

2.7 to 5.5

V

CCA

V

CCB

V

0 to V

V

I

CCA

V

I/O Voltage

0 to V

V

I/OA

CCA

V

I/O Voltage

0 to V

V

I/OB

CCB

T

Operating Temperature

-55 to 125

0 to 10

°C

ns/V

op

dt/dv

Input Rise and Fall Time (note 2)

1) V from 30% to 70% of V

IN

CC

2) V

= 2.7 to 3.6V; V

= 2.7 to 5.5V;

CCA

CCB

Table 6: DC Specifications For V

CCA

Test Condition

Value

T = 25 °C

Symbol

Parameter

-40 to 85 °C -55 to 125°C Unit

A

V

CCB

CCA

(V)

Min. Typ. Max. Min. Max. Min. Max.

V

High Level Input

Voltage

2.7

3.0

3.6

2.7

3.0

3.6

3.0

3.6

5.5

3.0

3.6

5.5

3.0

2.0

IHA

V

Low Level Input

Voltage

0.8

ILA

V

High Level

Output Voltage

I =-100 µA

2.9 2.99

2.56 2.85

2.35 2.65

2.9

2.46

2.25

2.2

2.9

2.46

2.25

2.2

OHA

O

I =-12 mA

3.0

2.7

3.0

2.7

3.0

4.5

3.0

4.5

O

I =-24 mA

V

O

I =-12 mA

2.3

2.1

2.5

2.3

0.0

O

I =-24 mA

2.0

O

V

Low Level Output

Voltage

I =100 µA

0.1

0.44

0.5

0.1

0.44

0.5

OLA

O

I =24 mA

0.21 0.36

0.11 0.36

0.22 0.42

O

I =12 mA

O

I =24 mA

O

I

Input Leakage

Current

IA

V = V or GND

3.6

5.5

± 0.1

± 0.5

± 1

± 5

± 1

± 5

µA

I

CC

I

High Impedance

Output Leakage

Current

V

= V

or V

OZA

IA

IB

IHA

ILA

ILB

= V

IHB

V

= V

or

I/OA

CCA

GND

I

Quiescent Supply 3.6

Current

5.5

V

= V

or GND

5

50

µA

CCtA

IA

IB

CCA

CCB

I

Quiescent V

3.6 Open V = V

or GND

CCtAF

CCA

IA

CCA

Supply Current

as B Port Floats

G= DIR = V

CCA

V

= Open

IB

∆I

Maximum

3.6

5.5

V

= V - 0.6V

CCA

0.35

0.5

0.5 mA

CCtA

IA

Quiescent Supply

Current / Input

(An, DIR, G)

V

= V

or GND

CCB

IB

3/14

74LVXC3245

Table 7: DC Specifications For V

CCB

Test Condition

Value

T = 25 °C

Symbol

Parameter

-40 to 85 °C -55 to 125°C Unit

A

V

CCB

CCA

(V)

Min. Typ. Max. Min. Max. Min. Max.

V

High Level Input

Voltage

2.7

3.0

3.6

2.7

3.0

3.6

3.0

3.6

5.5

3.0

3.6

5.5

3.0

2.0

IHB

V

3.85

V

Low Level Input

Voltage

0.8

ILB

1.65

V

High Level

I =-100 µA

2.9

3.0

2.9

OHB

O

Output Voltage

I =-12 mA

3.0

4.5

3.0

4.5

2.56 2.85

2.35 2.65

3.86 4.25

0.00

2.46

2.25

3.76

2.46

2.25

3.76

O

V

I =-24 mA

O

I =-24 mA

O

V

Low Level Output

Voltage

I =100 µA

0.1

OLB

O

I =24 mA

0.21 0.36

0.18 0.36

0.44

O

I =24 mA

O

I

Input Leakage

Current

IB

V = V

or GND

CCA

3.6

5.5

± 0.1

± 0.5

± 1

± 5

± 1

± 5

µA

I

High Impedance

Output Leakage

Current

V

= V

or V

OZB

IA

IHA ILA

V

= V

or

I/OB

CCB

GND

= V or

CCA

GND

= V

GND

= V

CCA

I

Quiescent Supply 3.6

Current

5.5

V

5

50

µA

CCtB

IA

IB

V

or

CCB

∆I

Maximum

3.6

or

1.35

1.5

1.5 mA

CCtB

IA

Quiescent Supply

Current / Input

GND

= V

V

- 2.1V

CCB

IB

4/14

74LVXC3245

Table 8: Dynamic Switching Characteristics

Test Condition

Value

-40 to 85 °C -55 to 125°C Unit

Min. Typ. Max. Min. Max. Min. Max.

T

= 25 °C

Symbol

Parameter

A

V

CCB

CCA

(V)

V

Dynamic Low Level

Quiet Output

(note 1, 2)

3.3

5.5

1.0

-0.6

0.8

1.5

OLPA

OLPB

V

-1.2

-0.8

Dynamic Low Level

Quiet Output

(note 1, 2)

1.2

-0.5

V

Dynamic High Voltage

Input (note 1, 3)

IHDA

3.3

5.5

2

V

Dynamic Low Voltage

Input (note 1, 3)

ILDA

IHDB

0.8

V

Dynamic High Voltage

Input (note 1, 3)

V

Dynamic Low Voltage

Input (note 1, 3)

ILDB

0.8

1) Worst case package

2) Max number of output defined as (n). Data inputs are driven 0V to 3.3V, (n-1) outputs switching and one output at GND

3) Max number of data inputs (n) switching. (n-1) switching 0V to 3.3V. Inputs under test switching: 3V to threshold (V ). 0V to threshold

ILD

(V ) f = 1MHz

IHD

5/14

74LVXC3245

Table 9: AC Electrical Characteristics (C = 50pF, Input t = t = 3ns)

L

r

f

(3)

Test Condition

Value

Symbol

Parameter

Unit

T = 25°C

-40 to 85°C -55 to 125°C

A

V

CCB

(V)

Min. Typ. Max. Min. Max. Min. Max.

t

Propagation Delay 3.0(*)

Time (An to Bn)

1.0

5.5

4.8

5.2

3.9

6.0

4.7

6.1

4.8

6.3

4.0

4.5

8.5

8.0

6.5

9.0

8.0

9.5

8.5

9.5

8.0

1.0

9.0

8.5

7.0

9.5

8.5

10.0

9.0

10.0

8.5

1.0

9.5

9.

PLH

5.0(**)

ns

Propagation Delay 3.0(*)

9.0

7.5

9.5

8.5

10.5

9.5

10.5

8.5

PHL

Time (An to Bn)

5.0(**)

t

Output Enable

Time (G to Bn)

3.0(*)

5.0(**)

3.0(*)

5.0(**)

3.0(*)

5.0(**)

3.0(*)

5.0(**)

PZL

PZH

t

Output Enable

Time (G to Bn)

t

Output Disable

Time (G to Bn)

PLZ

PHZ

t

Output Disable

Time (G to Bn)

1.0

3.8

7.5

1.0

8.0

1.0

8.5

t

Propagation Delay 3.0(*)

1.0

4.4

3.8

5.1

4.3

6.4

5.9

5.8

5.4

5.2

4.6

3.4

3.1

0.5

7.0

6.5

7.5

10.0

9.5

9.0

9.5

6.5

1.0

7.5

7.0

1.0

7.5

PLH

Time (Bn to An)

5.0(**)

3.0(*)

5.0(**)

3.0(*)

5.0(**)

3.0(*)

5.0(**)

3.0(*)

5.0(**)

3.0(*)

5.0(**)

3.0(*)

5.0(**)

8.0

8.5

Propagation Delay

Time (Bn to An)

PHL

8.0

8.5

t

Output Enable

Time (G to An)

10.5

10.0

9.5

10.5

9.5

PZL

Output Enable

Time (G to An)

PZH

9.5

t

Output Disable

Time (G to An)

10.0

7.0

10.5

7.5

PLZ

PHZ

ns

t

Output Disable

Time (G to An)

7.0

7.5

t

Output To Output

Skew Time (note1,

2)

1.5

OSLH

1.5

OSHL

1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch-

ing in the same direction, either HIGH or LOW (t

2) Parameter guaranteed by design

= | t

- t

|, t

= | t

- t

|

OSLH

PLHm PLHn OSHL

PHLm PHLn

3) Typical values referred at V

= 3.3V, V

= 5.0V or V

= 3.3V, V

= 3.3V

CCB

CCA

CCB

CCA

(*) Voltage Range is 3.0V ± 0.3

(**) Voltage Range is 5.0V ± 0.5

6/14

74LVXC3245

Table 10: Capacitive Characteristics

Test Condition

Value

-40 to 85 °C -55 to 125°C Unit

Min. Typ. Max. Min. Max. Min. Max.

T = 25 °C

Symbol

Parameter

A

V

CCB

(V)

CCA

(V)

C

Input

Capacitance

open open

4.5

10

55

10

V

INA

C

Input/Output

Capacitance

3.3

5.0

I/O

PD

Dynamic Low

Level Quiet

Output (note 1)

A to B

C

Dynamic Low

Level Quiet

Output (note 1)

B to A

3.3

5.0

40

V

PD

1) C is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without

PD

load. (Refer to Test Circuit). Average current can be obtained by the following equation. I

= C x V x f + I /8 (per circuit)

CC(opr)

PD CC IN CC

Figure 3: Test Circuit

TEST

SWITCH

t

, t

Open

PLH PHL

, t

2V

CC

PZLH PLZ

, t

Open

PZH PHZ

C

R

= 50pF or equivalent (includes jig and probe capacitance)

L

T

= R = 500Ω or equivalent

1

OUT

= Z

of pulse generator (typically 50Ω)

7/14

74LVXC3245

Figure 4: Waveform - Propagation Delays (f=1MHz; 50% duty cycle)

Figure 5: Waveform - Output Enable And Disable Time (f=1MHz; 50% duty cycle)

8/14

74LVXC3245

SO-24 MECHANICAL DATA

mm.

inch

TYP.

DIM.

MIN.

TYP

MAX.

MIN.

MAX.

A

A1

B

2.35

2.65

0.093

0.104

0.1

0.33

0.23

15.20

7.4

0.30

0.51

0.32

15.60

7.6

0.004

0.013

0.009

0.598

0.291

0.012

0.020

0.013

0.614

0.299

C

D

E

e

1.27

0.050

H

10.00

0.25

0.4

10.65

0.75

1.27

8°

0.394

0.010

0.016

0°

0.419

0.030

0.050

8°

h

L

k

0°

ddd

0.100

0.004

0070769C

9/14

74LVXC3245

TSSOP24 MECHANICAL DATA

mm.

inch

TYP.

DIM.

MIN.

TYP

MAX.

1.1

MIN.

MAX.

0.043

0.006

A

A1

A2

b

0.05

0.15

0.002

0.9

0.035

0.19

0.09

7.7

0.30

0.20

7.9

0.0075

0.0035

0.303

0.0118

0.0079

0.311

c

D

E

4.3

4.5

0.169

0.177

e

0.65 BSC

0.0256 BSC

H

K

6.25

0°

6.5

8°

0.246

0°

0.256

8°

L

0.50

0.70

0.020

0.028

A2

A

K

L

b

e

A1

H

c

D

E

PIN 1 IDENTIFICATION

1

7047476B

10/14

74LVXC3245

Tape & Reel SO-24 MECHANICAL DATA

mm.

TYP

inch

TYP.

DIM.

MIN.

MAX.

330

MIN.

MAX.

12.992

0.519

A

C

12.8

20.2

60

13.2

0.504

0.795

2.362

D

N

T

30.4

11.0

15.9

3.1

1.197

0.433

0.626

0.122

0.161

0.476

Ao

Bo

Ko

Po

P

10.8

15.7

2.9

0.425

0.618

0.114

0.153

0.468

3.9

4.1

11.9

12.1

11/14

74LVXC3245

Tape & Reel TSSOP24 MECHANICAL DATA

mm.

TYP

inch

TYP.

DIM.

MIN.

MAX.

330

MIN.

MAX.

12.992

0.519

A

C

12.8

20.2

60

13.2

0.504

0.795

2.362

D

N

T

22.4

7

0.882

0.276

0.331

0.075

0.161

0.476

Ao

Bo

Ko

Po

P

6.8

8.2

0.268

0.323

0.067

0.153

0.468

8.4

1.9

4.1

12.1

1.7

3.9

11.9

12/14

74LVXC3245

Table 11: Revision History

Date

Revision

Description of Changes

Ordering Codes Revision - pag. 1.

27-Aug-2004

4

13/14

74LVXC3245

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences

of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted

by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject

to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not

authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.

The ST logo is a registered trademark of STMicroelectronics

All other names are the property of their respective owners

STMicroelectronics group of companies

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www.st.com

14/14


型号：	74LVXC3245MTR
厂家：	ST
描述：	OCTAL DUAL SUPPLY BUS TRANSCEIVER 八路双电源总线收发器总线收发器
文件：	总14页 (文件大小：349K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

74LVXC3245MTR [STMICROELECTRONICS]

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