Diodes 74AHC126 User Manual

74AHC126

QUADRUPLE 3-STATE BUFFERS OE HIGH

Description

The 74AHC126 provides provides four independent buffer gates with

3-state outputs. Each buffer has a separate enable pin that when

driven with a low logic level places the corresponding output in the

high impedance state. The device is designed for operation with a

power supply range of 2.0V to 5.5V. The inputs are tolerant to 5.5V

allowing this device to be used in a mixed voltage environment.

Pin Assignments

Features

• Wide Supply Voltage Range from 2.0V to 5.5V

• Outputs Sink or Source 8mA at V

• CMOS Low Power Consumption

• Schmitt Trigger Action at All Inputs

• Inputs can be driven by 3.3V or 5.5V allowing for voltage

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translation applications.

• ESD Protection Exceeds JESD 22

 200-V Machine Model (A115-A)

 2000-V Human Body Model (A114-A)

 Exceeds 1000-V Charged Device Model (C101C)

• Latch-Up Exceeds 250mA per JESD 78, Class II

• Range of Package Options SO-14 and TSSOP-14

• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

• Halogen and Antimony Free. “Green” Device (Note 3)

Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.

= 4.5V

CC

Applications

• General Purpose Logic

• Wide array of products such as:

 PCs, Networking, Notebooks, Netbooks

 Computer Peripherals, Hard Drives, CD/DVD ROM

 TV, DVD, DVR, Set Top Box

Click here for ordering information, located at the end of datasheet

74AHC126

Document number: DS35346 Rev. 3 - 2

1 of 9

www.diodes.com

January 2013

© Diodes Incorporated

Pin Descriptions

Pin

Number

1 1OE Data Enable Input (active low)

2 1A Data Input

3 1Y Data Output

4 2OE Data Enable Input (active low)

5 2A Data Input

6 2Y Data Output

7 GND Ground

8 3Y Data Output

9 3A Data Input

10 3OE Data Enable Input (active low)

11 4Y Data Output

12 4A Data Input

13 4OE Data Enable Input (active low)

14

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Pin Name Function

CC

Supply Voltage

V

Logic Diagram

Function Table

Inputs Output

OE

H H H

H L L

L X Z

Absolute Maximum Ratings (Note 4) (@T

Symbol Description Rating Unit

ESD HBM Human Body Model ESD Protection 2 KV

ESD CDM Charged Device Model ESD Protection 1 KV

ESD MM Machine Model ESD Protection 200 V

VCC

VI

IIK Input Clamp Current VI < -0.5V

IOK Output Clamp Current VO < -0.5V

IOK Output Clamp Current VO > VCC +0.5V

IO Continuous Output Current -0.5V < V

ICC Continuous Current Through VCC

I

GND

TJ

T

STG

P

TOT

Note: 4. Stresses beyond the absolute maximum may result in immediate failure or reduced reliability. These are stress values and device operation should
be within recommend values.

A Y

= +25°C, unless otherwise specified.)

A

Supply Voltage Range -0.5 to +7.0 V

Input Voltage Range -0.5 to +7.0 V

-20 mA

-20 mA

25 mA

+0.5V

O VCC

Continuous Current Through GND -75 mA

Operating Junction Temperature -40 to +150 °C

Storage Temperature -65 to +150 °C

Total Power Dissipation 500 mW

+/- 25 mA

75 mA

74AHC126

74AHC126

Document number: DS35346 Rev. 3 - 2

2 of 9

www.diodes.com

January 2013

© Diodes Incorporated

Recommended Operating Conditions (Note 5) (@T

Symbol Parameter Conditions Min Max Unit

VCC

VI

VO

Δt/ΔV Input Transition Rise or Fall Rate

TA

Note: 5. Unused inputs should be held at VCC or Ground.

Operating Free-Air Temperature -40 +125 °C

Electrical Characteristics (@T

Symbol Parameter Test Conditions

Supply Voltage 2.0 5.5 V

Input Voltage 0 5.5 V

Output Voltage 0

V

CC

VCC = 4.5V to 5.5V

= +25°C, unless otherwise specified.)

A

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VIH

VIL

VOH

VOL

IOZ

II

ICC

High-Level

Input Voltage

Low-Level Input

Voltage

High-Level

Output Voltage

Low-Level

Output Voltage

Z State

Leakage

Current

Input Current

Supply Current

VI = GND or VCC, IO = 0

74AHC126

Document number: DS35346 Rev. 3 - 2

V

VI = GND to 5.5V

2.0V 1.5 1.5

3.0V 2.1 2.1

5.5V 3.85 3.85

2.0V 0.5 0.5

3.0V 0.9 0.9

5.5V 1.65 1.65

= -50μA

I

OH

IOH = -50μA

IOH = -50μA

IOH = -4mA

IOH = -8mA

= 50μA

I

OL

IOL = 50μA

IOL = 50μA

IOL = 4mA

IOL = 8mA

= 0 to 5.5V

V

O

= GND or 5.5V

I

74AHC126

= +25°C, unless otherwise specified.)

A

VCC

= 3.0V to 3.6V

T

V

CC

2.0V 1.9 1.9

3.0V 2.9 2.9

4.5V 4.4 4.4

3.0V 2.48 2.40

4.5V 3.80 3.70

2.0V 0.1 0.1

3.0V 0.1 0.1

4.5V 0.1 0.1

3.0V 0.44 0.55

4.5V 0.44 0.55

5.5V ±2.5 ±10 μA

3.6V ±1 ±2 μA

3.6V 20 40 μA

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A

Min Max Min Max

3 of 9

100

20

= -40°C to +85°C TA = -40°C to +125°C

© Diodes Incorporated

V

ns/V

Unit

V

V

V

V

January 2013