HD74HCT640 datasheet(5/7 Pages) HITACHI

Part #	HD74HCT640

Description	Octal Bus Transceivers (with 3-state outputs)

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Manufacturer	HITACHI [Hitachi Semiconductor]

Direct Link	http://www.renesas.com/eng

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5 / 7 page

HD74HCT640/HD74HCT643

5

DC Characteristics

Ta = 25

°C

Ta = –40 to

+85

°C

Test Conditions

Item

Symbol

Min Typ Max Min

Max

Unit

V

CC (V)

Input voltage

V

IH

2.0

—

2.0

—

V

4.5 to

5.5

V

IL

—

0.8

—

0.8

V

4.5 to

5.5

Output voltage

V

OH

4.4

—

4.4

—

V

4.5

Vin = V

IH or VIL

I

OH = –20 µA

4.18 —

—

4.13

—

4.5

I

OH = –6 mA

V

OL

—

0.1

—

0.1

V

4.5

Vin = V

IH or VIL

I

OL = 20 µA

—

0.26 —

0.33

4.5

I

OL = 6 mA

Off-state output

current

I

OZ

——

±0.5 —

±5.0 µA

5.5

Vin = V

IH or VIL,

Vout = V

CC or GND

Input current

Iin

—

±0.1 —

±1.0 µA

5.5

Vin = V

CC or GND

Quiescent current

I

CC

—

4.0

—

40

µA

5.5

Vin = V

CC or GND, Iout = 0 µA

AC Characteristics (C

L = 50 pF, Input tr = tf = 6 ns)

Ta = 25

°C

Ta = –40 to

+85

°C

Test Conditions

Item

Symbol

Min Typ Max Min

Max

Unit

V

CC (V)

Propagation delay t

PLH

—

13

18

—

23

ns

4.5

time

t

PHL

—

16

18

—

23

4.5

Output enable

t

ZH

—

16

46

—

58

ns

4.5

time

t

ZL

—

16

46

—

58

4.5

Output disable

t

HZ

—

17

43

—

54

ns

4.5

time

t

LZ

—

21

43

—

54

4.5

Output rise/fall

time

t

TLH

t

THL

—

4

12

—

15

ns

4.5

Input capacitance

Cin

—

5

10

—

10

pF

—

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