Diodes 74AHCT126 User Manual

74AHCT126

QUADRUPLE 3-STATE BUFFERS OE HIGH

Description

The 74AHCT126 provides provides four independent buffer gates

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

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 4.5V to 5.5V.

Pin Assignments

Features

• Wide Supply Voltage Range from 4.5V to 5.5V

• Inputs Are TTL Voltage Level Compatible

• Outputs Sink or Source 8mA at V

• CMOS Low Power Consumption

• Schmitt Trigger Action at All Inputs

• ESD Protection Exceeds JESD 22

NEW PRODUCT

 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)

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

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

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

74AHCT126

Document number: DS35356 Rev. 2 - 2

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January 2013

74AHCT126

Pin Descriptions

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)

NEW PRODUCT

14

Pin Name Function

V

Supply Voltage

CC

Logic Diagram

Function Table

Inputs Output

OE

L H H

L L L

H 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 V

IOK Output Clamp Current VO > VCC

IO Continuous Output Current 0V < 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.

74AHCT126

Document number: DS35356 Rev. 2 - 2

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

< VCC

O

Continuous Current Through GND -50 mA

Operating Junction Temperature -40 to +150 °C

Storage Temperature -65 to +150 °C

Total Power Dissipation 500 mW

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+/- 25 mA

50 mA

January 2013

Recommended Operating Conditions (Note 5) (@T

Symbol Parameter Min Max Unit

VCC

VI

VO

Supply Voltage 4.5 5.5 V

Input Voltage 0 5.5 V

Output Voltage 0

Δt/ΔV Input transition Rise or Fall Rate 20 ns/V

TA

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

Operating Free-Air Temperature -40 +125 °C

Electrical Characteristics (@T

= +25°C, unless otherwise specified.)

A

Symbol Parameter Test Conditions Vcc

NEW PRODUCT

VIH

VIL

VOH

VOL

IOZ

II

ICC

ΔICC

High-Level Input Voltage

Low-Level Input Voltage

High-Level Output Voltage

Low-Level Output Voltage

Z State Leakage Current

Input Current

Supply Current

Additional Supply Current

4.5V to 5.5V 2.0 2.0 V

4.5V to 5.5V 0.8 0.8 V

= -50μA

I

OH

IOH = -8mA

= 50μA

I

OL

IOL = 8mA

VO = 0 to 5.5V

VI = GND to 5.5V

VI = GND or VCC, IO = 0

One input at V Other pins at V

–2.1V

CC

or GND

CC

Operating Characteristics

Test

Conditions

f = 1MHz 14.8 pF

= V

V

– or

i

CC

GND

Cpd

Ci

Parameter

Power Dissipation

Capacitance per Gate

Input Capacitance

Switching Characteristics (V

= 4.5V to 5.5V)

CC

Symbol Parameter Test Conditions

tPD Propagation Delay AN to YN

tEN

t

DIS

Enable Time OE

Disable Time OE

to YN

N

to YN

N

Figure 1 C

Figure 1 CL = 50pF

Figure 1 C

Figure 1 CL = 50pF

Figure 1 C

Figure 1 CL = 50pF

= 15pF

L

= 15 pF

L

= 15pF

L

74AHCT126

Document number: DS35356 Rev. 2 - 2

74AHCT126

= +25°C, unless otherwise specified.)

A

VCC

TA = -40°C to +85°C TA = -40°C to +125°C

Min Max Min Max

4.5V 4.4 4.4

4.5V 3.80 3.70

4.5V 0.1 0.1

4.5V 0.44 0.55

5.5V ±2.5 ±10 μA

3.6V ±1 ±2 μA

3.6V 20 40 μA

5.5V 1.35 5 mA

= 5.5V

V

CC

Typ

Unit

4.0 pF

= +25°C

T

A

Min Typ Max Min Max Min Max

0.5 3.0 5.5 0.5 6.5 0.5 7.0

0.5 4.3 7.5 0.5 8.5 0.5 9.5

0.5 3.3 5.1 0.5 6.0 0.5 6.5

0.5 4.7 7.1 0.5 8.0 0.5 9.0

0.5 4.8 6.8 0.5 8.0 0.5 8.5

0.5 6.5 8.9 0.5 10.0 0.5 11.5

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V

-40°C to +85°C -40°C to +125°C

January 2013

Unit

V

Unit

ns