HITACHI HD74LVC125A User Manual

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Quad. Bus Buffer Gates with 3-state Outputs

Description

The HD74LVC125A has four bus buffer gates in a 14 pin package. The device require the three state
control input C to be taken high to put the output into the high impedance condition, whereas the device
requires the control input to be low to put the output into high impedance. 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.

HD74LVC125A

ADE-205-108B(Z)

3rd Edition

December 1996

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 (@V

OUT

= 0 V or output off state)

CC

Function Table

Inputs

C A Outputs Y

HX Z
LL L
LHH

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

HD74LVC125A

Pin Arrangement

1C
1A
1Y
2C
2A
2Y

GND

1
2
3
4
5

6
7

14
13
12
11
10

V

CC

4C
4A

4Y
3C
3A

9
8

3Y

(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" or VCC:OFF
±50 mA
100 mA

2

HD74LVC125A

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 hold

2.0 to 5.5 V At operation
0 to 5.5 V C, 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

HD74LVC125A

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

IOZ

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 VCC 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

HD74LVC125A

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 output pins skew *1t

Input capacitance C
Output capacitance C

t

t

t

t

PLH

PHL

ZH

ZL

HZ

LZ

OSLH

OSHL

IN

O

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

tos

LH

= | t

PLHm

- t

PLHn

|, tosHL = | t

2.7 — — 6.5 ns A Y

3.3±0.3 1.5 — 6.0 ns

5.0±0.5 — — 5.0 ns

2.7 — — 8.0 ns C Y

3.3±0.3 1.5 — 7.0 ns

5.0±0.5 — — 6.0 ns

2.7 — — 6.5 ns C Y

3.3±0.3 1.5 — 5.5 ns

5.0±0.5 — — 4.5 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

HD74LVC125A

Test Circuit

V

CC

V

CC

Input

Pulse Generator

Z = 50

out

Ω

See Function Table

Note: 1. CL includes probe and jig capacitance.

Output

C =

L

50 pF

Ω

50 Scope

Symbol

t / t

PLH PHL

t / t

ZH HZ

t / t

ZL LZ

500

450

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

6

Waveforms – 1

HD74LVC125A

Input A

10 %

Output Y

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

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

Waveforms – 2

t

f

Input C

Waveform - A

Waveform - B

90 %

10 %

V

ref

t

r

V

t

PLH

90 %

ref

V

ref

90 %

t

r

10 %

t

ZL

V

ref

t

ZH

V

ref

V

ref

V

ref

90 %

t

t

HZ

LZ

t

f

V

IH

10 %

t

PHL

V

ref

GND

V

OH

V

OL

V

IH

GND

≈V

OH1

V + 0.3 V

OL

V – 0.3 V

OH

V
V

≈V

OL

OH

OL1

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.

TEST

V

IH

V

ref

V

OH1

V

OL1

Vcc=2.7V,

3.3±0.3V

Vcc=5.0±0.5V

2.7 V Vcc

1.5 V

50%Vcc

3 V

GND

Vcc

GND

7

Hitachi Code
JEDEC
EIAJ
Weight

(reference value)

TTP-14D
—
—

0.05 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

17

14 8

4.40

5.00

5.30 Max

0.83 Max

*0.22

+0.08
–0.07

0.07

+0.03

–0.04

0.20 ± 0.06

0.15 ± 0.04

1.0

Cautions

1. Hitachi neither warrants nor grants licenses of any rights of Hitachi’s or any third party’s patent,
copyright, trademark, or other intellectual property rights for information contained in this document.
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 fail­safes, 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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Tel: Tokyo [phone] Fax: [phone]

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Copyright ' Hitachi, Ltd., 1999. All rights reserved. Printed in Japan.

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