HD74ACT244P - Hitachi Semiconductor

HD74AC244/HD74ACT244

Octal Buffer/Line Driver with 3-State Output

ADE-205-383 (Z)

1st. Edition

Sep. 2000

Description

The HD74AC244/HD74ACT244 is an octal buffer and line driver designed to be employed as a memory

address driver, clock driver and bus-oriented transmitter/receive which provides improved PC board

density.

Features

• 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers

• Outputs Source/Sink 24 mA

• HD74ACT244 has TTL-Compatible Inputs

Pin Arrangement

10 11

GND

OE1V

OE2

(Top view)

1A1

2Y4

1A2

2Y3

1A3

2Y2

1A4

2Y1

1Y1

2A4

1Y2

2A3

1Y3

2A2

2A1

1Y4

HD74AC244/HD74ACT244

Truth Tables

Inputs Outputs (Pins 12, 14, 16, 18)

OE1AY

LLL

LHH

HXZ

Inputs Outputs (Pins 3, 5, 7, 9)

OE2AY

LLL

LHH

HXZ

H : High Voltage Level

L : Low Voltage Level

X : Immaterial

Z : High Impedance

DC Characteristics (unless otherwise specified)

Item Symbol Max Unit Condition

Maximum quiescent supply current ICC 80 µAV

IN = VCC or ground, VCC = 5.5 V,

Ta = Worst case

Maximum quiescent supply current ICC 8.0 µAV

IN = VCC or ground, VCC = 5.5 V,

Ta = 25°C

Maximum additional ICC/input

(HD74ACT244) ICCT 1.5 mA VIN = VCC – 2.1 V, VCC = 5.5 V,

Ta = Worst case

HD74AC244/HD74ACT244

AC Characteristics: HD74AC244

Ta = +25°C

CL = 50 pF Ta = –40°C to +85°C

CL = 50 pF

Item Symbol VCC (V)*1Min Typ Max Min Max Unit

Propagation delay tPLH 3.3 1.0 6.5 9.0 1.0 10.0 ns

Data to output 5.0 1.0 5.0 7.0 1.0 7.5

Propagation delay tPHL 3.3 1.0 6.5 9.0 1.0 10.0 ns

Data to output 5.0 1.0 5.0 7.0 1.0 7.5

Output enable time tZH 3.3 1.0 6.0 10.5 1.0 11.0 ns

5.0 1.0 5.0 7.0 1.0 8.0

Output enable time tZL 3.3 1.0 7.5 10.0 1.0 11.0 ns

5.0 1.0 5.5 8.0 1.0 8.5

Output disable time tHZ 3.3 1.0 7.0 10.0 1.0 10.5 ns

5.0 1.0 6.5 9.0 1.0 9.5

Output disable time tLZ 3.3 1.0 7.5 10.5 1.0 11.5 ns

5.0 1.0 6.5 9.0 1.0 9.5

Note: 1. Voltage Range 3.3 is 3.3 V ± 0.3 V

Voltage Range 5.0 is 5.0 V ± 0.5 V

AC Characteristics: HD74ACT244

Ta = +25°C

CL = 50 pF Ta = –40°C to +85°C

CL = 50 pF

Item Symbol VCC (V)*1Min Typ Max Min Max Unit

Propagation delay

Data to output tPLH 5.0 1.0 6.5 9.0 1.0 10.0 ns

Propagation delay

Data to output tPHL 5.0 1.0 7.0 9.0 1.0 10.0 ns

Output enable time tZH 5.0 1.0 6.0 8.5 1.0 9.5 ns

Output enable time tZL 5.0 1.0 7.0 9.5 1.0 10.5 ns

Output disable time tHZ 5.0 1.0 7.0 9.5 1.0 10.5 ns

Output disable time tLZ 5.0 1.0 7.5 10.0 1.0 10.5 ns

Note: 1. Voltage Range 5.0 is 5.0 V ± 0.5 V

HD74AC244/HD74ACT244

Capacitance

Item Symbol Typ Unit Condition

Input capacitance CIN 4.5 pF VCC = 5.5 V

Power dissipation capacitance CPD 45.0 pF VCC = 5.0 V

HD74AC244/HD74ACT244

Package Dimensions

Hitachi Code

JEDEC

EIAJ

Mass

(reference value)

DP-20N

—

Conforms

1.26 g

Unit: mm

0.51 Min

2.54 Min 5.08 Max

7.62

0.25

+ 0.11

– 0.05

2.54 ± 0.25 0.48 ± 0.10

24.50

25.40 Max

0.89 1.30

6.30

7.00 Max

110

1120

0° – 15°

1.27 Max

Hitachi Code

JEDEC

EIAJ

Mass

(reference value)

FP-20DA

—

Conforms

0.31 g

Unit: mm

*Dimension including the plating thickness

Base material dimension

*0.42 ± 0.08

0.12

0.15

*0.22 ± 0.05

0.80 Max

12.6

5.5

2.20 Max

13 Max

0° – 8°

0.70 ± 0.20

+ 0.20

– 0.30

7.80

1.27

0.10 ± 0.10

1.15

0.40 ± 0.06

0.20 ± 0.04

HD74AC244/HD74ACT244

Hitachi Code

JEDEC

EIAJ

Mass

(reference value)

FP-20DB

Conforms

—

0.52 g

Unit: mm

*Dimension including the plating thickness

Base material dimension

0.12

0.15

0° – 8°

20 11

0.20 ± 0.10

1.27

12.8

13.2 Max

7.50

2.65 Max

*0.27 ± 0.05

*0.42 ± 0.08

+ 0.57

– 0.30

0.70

+ 0.25

– 0.40

10.40

1.45

0.935 Max

0.40 ± 0.06

0.25 ± 0.04

Hitachi Code

JEDEC

EIAJ

Mass

(reference value)

TTP-20DA

—

0.07 g

Unit: mm

*Dimension including the plating thickness

Base material dimension

0.50 ± 0.10

0° – 8°

*0.17 ± 0.05

6.40 ± 0.20

0.10

1.10 Max

0.13 M

0.65

110

20 11

4.40

6.50

6.80 Max

*0.22

+0.08

–0.07

0.07

+0.03

–0.04

1.0

0.65 Max

0.20 ± 0.06

0.15 ± 0.04

HD74AC244/HD74ACT244

Cautions

1. Hitachi neither warrants nor grants licenses of any rights of Hitachi’s or any third party’s patent,

Hitachi bears no responsibility for problems that may arise with third party’s rights, including

intellectual property rights, in connection with use of the information contained in this document.

2. Products and product specifications may be subject to change without notice. Confirm that you have

received the latest product standards or specifications before final design, purchase or use.

3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,

contact Hitachi’s sales office before using the product in an application that demands especially high

quality and reliability or where its failure or malfunction may directly threaten human life or cause risk

of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,

traffic, safety equipment or medical equipment for life support.

4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly

for maximum rating, operating supply voltage range, heat radiation characteristics, installation

conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used

beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable

failure rates or failure modes in semiconductor devices and employ systemic measures such as fail-

safes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other

consequential damage due to operation of the Hitachi product.

5. This product is not designed to be radiation resistant.

6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without

written approval from Hitachi.

7. Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductor

products.

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