Datasheet HD74LVC244A Datasheet (HIT)

HD74LVC244A

Octal Buffers / Line Drivers with 3-state Outputs

ADE-205-110B(Z)

3rd Edition

December 1996

Description

The HD74LVC244A has eight line drivers with three state outputs in a 20 pin package. This device is a
non inverting buffer and has two active low enables (1G and 2G). Each enable independently controls four
buffers. Low voltage and high speed operation is suitable at the battery drive product (note type personal
computer) and low power consumption extends the life of a battery for long time operation.

Features

• VCC = 2.0 V to 5.5 V

• All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V)

• All outputs V

• Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C)

• Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25°C)

• High output current ±24 mA (@VCC = 3.0 V to 5.5 V)

(Max.) = 5.5 V (@VCC = 0 V or output off state)

OUT

Function Table

Inputs

G A Output Y

HX Z
LHH
LL L

H : High level
L : Low level
X : Immaterial
Z : High impedance

HD74LVC244A

Pin Arrangement

1G
1A1
2Y4
1A2
2Y3
1A3
2Y2

V

1
2
3
4
5

6
7

20
19
18
17
16
15
14

CC

2G
1Y1

2A4
1Y2
2A3
1Y3

1A4

2Y1

GND

8

9

10

13
12
11

2A2
1Y4
2A1

(Top view)

Absolute Maximum Ratings

Item Symbol Ratings Unit Conditions

Supply voltage V
Input diode current I
Input voltage V
Output diode current I

Output voltage V

Output current I
VCC, GND current / pin I

IK

OK

O

CC

CC

I

O

or I

GND

Storage temperature Tstg –65 to 150 °C
Note: The absolute maximum ratings are values which must not individually be exceeded, and furthermore,

no two of which may be realized at the same time.

–0.5 to 6.0 V
–50 mA VI = –0.5 V
–0.5 to 6.0 V
–50 mA VO = –0.5 V
50 mA VO = V

+0.5 V

CC

–0.5 to VCC +0.5 V Output "H" or "L"
–0.5 to 6.0 V Output "Z" VCC:OFF
±50 mA
100 mA

2

HD74LVC244A

Recommended Operating Conditions

Item Symbol Ratings Unit Conditions

Supply voltage V

Input / output voltage V

CC

I

V

O

Operating temperature Ta –40 to 85 °C
Output current I

Input rise / fall time

*1

OH

I

OL

tr, t

f

Notes: 1. This item guarantees maximum limit when one input switches.

Waveform : Refer to test circuit of switching characteristics.

2. duty cycle ≤ 50%

1.5 to 5.5 V Data retention

2.0 to 5.5 V At operation
0 to 5.5 V G, A
0 to V

CC

V Output "H" or "L"

0 to 5.5 V Output "Z" or VCC:OFF

–12 mA VCC = 2.7 V

*2

–24

mA VCC = 3.0 V to 5.5 V

12 mA VCC = 2.7 V

*2

24

mA VCC = 3.0 V to 5.5 V

10 ns/V

3

HD74LVC244A

Electrical Characteristics

Item Symbol V

Input voltage V

Output voltage V

Input current I
Off state output current I

Output leak current I
Quiescent supply current I

V

V

∆I

IH

IL

OH

OL

IN

OZ

OFF

CC

CC

Ta = –40 to 85°C

(V) Min Max Unit Test Conditions

CC

2.7 to 3.6 2.0 — V

4.5 to 5.5 VCC×0.7 — V

2.7 to 3.6 — 0.8 V

4.5 to 5.5 — VCC×0.3 V

2.7 to 5.5 V

–0.2 — V IOH = –100 µA

CC

2.7 2.2 — V IOH = –12 mA

3.0 2.4 — V

3.0 2.2 — V IOH = –24 mA

4.5 3.8 — V

2.7 to 5.5 — 0.2 V IOL = 100 µA

2.7 — 0.4 V IOL = 12 mA

3.0 — 0.55 V IOL = 24 mA

4.5 — 0.55 V
0 to 5.5 — ±5.0 µAVIN = 5.5 V or GND

2.7 to 5.5 — ±5.0 µAVIN = VCC, GND
V

= 5.5 V or GND

OUT

0—20µAVIN / V

2.7 to 3.6 — ±10 µAVIN / V

= 5.5 V

OUT

= 3.6 to 5.5 V

OUT

2.7 to 5.5 — 10 µAVIN = VCC or GND

3.0 to 3.6 — 500 µAVIN = one input at (V
other inputs at V

CC

–0.6)V,

CC

or GND

4

HD74LVC244A

Switching Characteristics

Ta = –40 to 85°C

Item Symbol VCC (V) Min Typ Max Unit From (Input) To (Output)

Propagation delay time t

Output enable time t

Output disable time t

Between outut pins skew *1t

Input capacitance C
Output capacitance C

t

t

t

t

PLH

PHL

ZH

ZL

ZH

LZ

OSLH

OSHL

IN

O

Note: 1. This parameter is characterized but not tested.

tos

LH

= | t

PLHm

- t

PLHn

|, tosHL = | t

2.7 — — 7.5 ns A Y

3.3±0.3 1.5 — 6.5 ns

5.0±0.5 — — 5.0 ns

2.7 — — 9.0 ns G Y

3.3±0.3 1.5 — 8.0 ns

5.0±0.5 — — 6.5 ns

2.7 — — 8.0 ns G Y

3.3±0.3 1.5 — 7.0 ns

5.0±0.5 — — 6.0 ns

2.7 — — — ns

3.3±0.3 — — 1.0 ns

5.0±0.5 — — 1.0 ns

2.7 — 3.0 — pF

2.7 — 15.0 — pF

- t

PHLn

|

PHLm

5

HD74LVC244A

Test Circuit

V

CC

V

CC

1G, 2G

Input

1Y1 to 2Y4

Pulse generator

Z = 50

out

Ω

1A1 to 2A4

See Function Table

Note: 1. CL includes probe and jig capacitance.

Waveforms – 1

t

r

90 %

V

Input A

10 %

ref

Output

C =

L

50 pF

Symbol

t / t

PLH PHL

90 %

V

Ω

50 Scope

t / t

ZH HZ

t / t

ZL LZ

t

f

ref

500

450

10 %

Ω

S1

Ω

Vcc=2.7V,

3.3±0.3V

OPEN

GND

6 V

OPEN

*1 See under table

GND

S1

Vcc=5.0±0.5V

OPEN

GND

2×Vcc

V

IH

GND

Output Y

Notes: 1. tr = 2.5 ns, tf = 2.5 ns

2. Input waveform : PRR = 10 MHz, duty cycle 50%

6

t

PLH

t

PHL

V

OH

V

ref

V

ref

V

OL

Waveforms – 2

HD74LVC244A

t

f

Input G

90 %

V

ref

10 %

Waveform - A

Waveform - B

Notes: 1. tr = 2.5 ns, tf = 2.5 ns

2. Input waveform : PRR = 10 MHz, duty cycle 50%

3. Waveform – A shows input conditions such that the output is "L" level when enable by the
output control.

4. Waveform – B shows input conditions such that the output is "H" level when enable by the
output control.

t

r

V

GND

≈V

V
V

≈V

50%Vcc

Vcc

GND

IH

OH1

OL

OH

OL1

90 %

V

ref

10 %

t

ZL

V

ref

t

ZH

V

ref

t

t

HZ

LZ

TEST

V

IH

V

ref

V

OH1

V

OL1

V + 0.3 V

OL

V – 0.3 V

OH

Vcc=2.7V,

3.3±0.3V

2.7 V Vcc

1.5 V
3 V

GND

Vcc=5.0±0.5V

7

20 11

110

+0.08

*0.22

–0.07

0.20 ± 0.06

6.50

6.80 Max

0.65 Max

0.65

0.13

Unit: mm

4.40

1.0

M

6.40 ± 0.20

0.10

1.10 Max

*Dimension including the plating thickness

Base material dimension

0.15 ± 0.04

*0.17 ± 0.05

+0.03

–0.04

0.07

0° – 8°

Hitachi Code
JEDEC
EIAJ

(reference value)

Weight

0.50 ± 0.10

TTP-20DA
—
—

0.07 g

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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 fail­safes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
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5. This product is not designed to be radiation resistant.

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