U74AHC640G-R20-R [UTC]

OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS;


型号：	U74AHC640G-R20-R
厂家：	Unisonic Technologies
描述：	OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS 输出元件
文件：	总7页 (文件大小：208K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

UNISONIC TECHNOLOGIES CO., LTD

U74HC640

CMOS IC

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

DESCRIPTION

The U74AHC640 is a octal bus transceivers with 3-state

outputs. It is designed for asynchronous two-way communication

between data buses. Depending on the direction-control (DIR) input,

data are transmitted from the A bus to the B bus or from the B bus to

the A bus.

When OE is high, the buses are effectively isolated. When

OE is low, the buses are enable.

FEATURES

* Wide Supply Voltage Range from 2V to 6V

* Typical t_PDof 8ns at 6V, C_L=50pF

* Low Power Consumption, I_CC= 8μA (Max) at 5.5V

* ±7.8mA Output Driver at 6V

ORDERING INFORMATION

Ordering Number

Lead Free

Package

Packing

Halogen Free

U74AHC640L-R20-R

U74AHC640L-R20-T

U74AHC640G-R20-R

U74AHC640G-R20-T

SSOP-20

Tape Reel

Tube

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CMOS IC

PIN CONFIGURATION

V_CC

DIR

13 B6

GND

11 B8

FUNCTION TABLE

INPUTS

OPERATION

DIR

B data to A bus

A data to B bus

Isolation

LOGIC DIAGRAM

DIR

To seven other transceivers

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U74HC640

CMOS IC

ABSOLUTE MAXIMUM RATING (unless otherwise specified)

PARAMETER

SYMBOL

V_CC

RATINGS

-0.5~7

UNIT

Supply Voltage

Input Voltage

Output Voltage

V_IN

-0.5~7

V_OUT

I_IK

-0.5~V_CC+0.5

±20

Input Clamp Current (V_IN<0)

Output Clamp Current (V_OUT<0, or V_OUT>V_CC

Output Current

°C

)

I_OK

±20

I_OUT

I_CC

±35

V_CCor GND Current

±70

Storage Temperature

T_STG

-65 ~ +150

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

2. Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress ratings only and functional device operation is not implied.

RECOMMENDED OPERATING COMDITIONS

PARAMETER

Supply Voltage

SYMBOL

V_CC

CONDITIONS

MIN

TYP

MAX

UNIT

V_CC= 2V

1.5

3.15

4.2

High-Level Input Voltage

Low-Level Input Voltage

V_IH

V_IL

V_CC= 4.5V

V_CC= 6V

V_CC= 2V

V_CC= 4.5V

V_CC= 6V

0.5

1.35

1.8

Input Voltage

V_IN

V_CC

1000

500

400

Output Voltage

V_OUT

V_CC= 2V

V_CC= 4.5V

V_CC= 6V

Input Transition Rise or Fall Rate

Operating Temperature

Δt/Δv

ns/V

°C

T_A

-40

ELECTRICAL CHARACTERISTICS (T_A=25°C , unless otherwise specified)

PARAMETER

SYMBOL

V_OH

TEST CONDITIONS

MIN

1.9

TYP

1.998

4.499

5.999

4.3

MAX

UNIT

_OH= -20μA, V_CC= 2V

I_OH= -20μA, V_CC= 4.5V

I_OH= -20μA, V_CC= 6V

I_OH= -6mA, V_CC= 4.5V

I_OH= -7.8mA, V_CC= 6V

I_OL= 20μA, V_CC= 2V

4.4

High-Level Output Voltage

Low-Level Output Voltage

5.9

3.98

5.48

5.8

0.002

0.001

0.17

0.1

I_OL= 20μA, V_CC= 4.5V

I_OL= 20μA, V_CC= 6V

V_OL

0.1

I_OL= 6mA, V_CC= 4.5V

I_OL= 7.8mA, V_CC= 6V

V_IN= V_CCor 0, V_CC= 6V

V_OUT= V_CCor 0, V_CC= 6V

V_IN=V_CCor 0,I_OUT=0,V_CC=6V

V_IN=V_CCor 0,V_CC=2V to 6V

0.26

±100

±0.5

0.15

Input Leakage Current(DIR or OE )

High-Impedance State Current (A or B)

Quiescent Supply Current

I_I(LEAK)

I_OZ

±0.1

μA

±0.01

I_CC

Input Capacitance (DIR or OE )

C_IN

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U74HC640

CMOS IC

SWITCHING CHARACTERISTICS (T_A=25°C)

C_L=50pF, R_L=1kΩ

PARAMETER

SYMBOL

t_PD

TEST CONDITIONS

V_CC=2V

MIN TYP MAX UNIT

29 105

Propagation Delay from A to B or B to A

Enable Times from OE to A or B

Disable Times from OE to A or B

Output Rise or fall Time

V_CC=4.5V

V_CC=6V

V_CC=2V

V_CC=4.5V

V_CC=6V

V_CC=2V

V_CC=4.5V

V_CC=6V

V_CC=2V

V_CC=4.5V

V_CC=6V

10 21

109 230

27 46

20 39

40 150

18 30

16 26

20 60

t_EN

t_DIS

t_T

C_L=150pF, R_L=1kΩ

PARAMETER

SYMBOL

t_PD

TEST CONDITIONS

MIN TYP MAX UNIT

44 190

V_CC=2V

V_CC=4.5V

V_CC=6V

V_CC=2V

V_CC=4.5V

V_CC=6V

V_CC=2V

V_CC=4.5V

V_CC=6V

Propagation Delay from A to B or B to A

Enable Times from OE to A or B

OUTPUT rise or fall Time

14 38

11 33

124 315

31 63

23 54

45 210

17 42

13 36

t_EN

t_T

OPERATING CHARACTERISTICS (T_A=25°C)

PARAMETER

Power Dissipation Capacitance

SYMBOL

C_PD

TEST CONDITIONS

No load

TYP

UNIT

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CMOS IC

TEST CIRCUIT AND WAVEFORMS

TEST

t_PLH/t_PHL

t_PLZ/t_PZL

t_PHZ/t_PZH

Open

V_LOAD

GND

Input

V_Δ

V_CC

V_M

V_LOAD

V_CC

C_L

R_L

V_IN

t_R, t_F

50pF

150pF

50pF

3.3V±0.3V

5V±0.5V

V_CC

≤3ns

V_CC/2

1kΩ

0.3V

0.5V

V_CC

≤3ns

V_CC

150pF

V_CC

90%

Input

10%

t_R

t_F

Voltage Waveforms Input Rise and Fall Times

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U74HC640

CMOS IC

TEST CIRCUIT AND WAVEFORMS(Cont.)

V_IN

V_M

Input

V_M

t_PHL

t_PLH

V_OH

90%

V_M

90%

Output

V_M

10%

t_PHL

10%

V_OL

t_R

t_F

t_PLH

V_OH

90%

V_M

Output

V_M

10%

V_OL

t_R

t_F

Voltage Waveforms Propagation Delay and Output Transition Times

V_IN

Input

V_M

t_PZL

t_PLZ

V_LOAD

Output

V_M

S1 at V_LOAD

V_OL+V_Δ

V_OL

t_PHZ

t_PZH

V_OH

V_OH-V_Δ

Output

V_M

S1 at GND

VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES

Notes: 1. C_Lincludes probe and jig capacitance.

2. All input pulses are supplied by generators having the following characteristics: P_RR≤1MHz, Z_O= 50Ω,

t_R=6ns, t_F=6ns.

3. t_PLHand t_PHLare the same as t_PD

4. t_PLZand t_PHZare the same as t_DIS

5. t_PZHand t_PZLare the same as t_EN

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U74HC640

CMOS IC

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.

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U74AHC640G-R20-R [UTC]

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