Használati útmutató Texas Instruments SN74AHC125D

Texas Instruments nincs kategorizálva SN74AHC125D

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Oldal 1/39

1OE

1A 1Y

2OE

2A 2Y

3OE

3A 3Y

4OE

4A 4Y

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

SN54AHC125

SN74AHC125

SCLS256L – DECEMBER 1995 – REVISED NOVEMBER 2016

SNx4AHC125 Quadruple Bus Buer Gates With 3-State Outputs

1 Features

• Operating Range: 2 V to 5.5 V

• Latch-Up Performance Exceeds 250 mA Per

JESD 17

• Four Individual Output Enable Pins

• All Inputs Have Schmitt-Trigger Action

2 Applications

• Flow Meters

• Programmable Logic Controllers

• Power Over Ethernet (PoE)

• Motor Drives and Controls

• Electronic Point-of-Sale

3 Description

The SNx4AHC125 devices are quadruple bus buer

gates featuring independent line drivers with 3-state

outputs. Each output is disabled when the associated

output-enable (OE) input is high. When OE is low, the

respective gate passes the data from the A input to

its Y output.

To ensure the high-impedance state during power up

or power down, OE must be tied to V CC through a

pullup resistor; the minimum value of the resistor is

determined by the current-sinking capability of the

driver.

Device Information(1)

PART NUMBER PACKAGE (PINS) BODY SIZE (NOM)

SNx4AHC125FK LCCC (20) 8.89 mm 8.89 mm

SNx4AHC125DB SSOP (14) 6.20 mm 5.30 mm

SNx4AHC125D SOIC (14) 8.65 mm × 3.91 mm

SNx4AHC125NS SO (14) 10.30 mm × 5.30 mm

SNx4AHC125W CFP (14) 9.21 mm × 5.97 mm

SNx4AHC125DGV TVSOP (14) 3.60 mm × 4.40 mm

SNx4AHC125PW TSSOP (14) 5.00 mm × 4.40 mm

SNx4AHC125N PDIP (14) 19.30 mm × 6.35 mm

SNx4AHC125RGY VQFN (14) 3.50 mm × 3.50 mm

SNx4AHC125J CDIP (14) 19.56 mm × 6.67 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Logic Diagram (Positive Logic)

Pin numbers shown are for the D, DB, DGV, J, N, NS, PW, RGY, and W packages.

SN54AHC125

SN74AHC125

SCLS256L – DECEMBER 1995 – REVISED NOVEMBER 2016

www.ti.com

Product Folder Links: SN54AHC125 SN74AHC125

Table of Contents

1 Features .................................................................. 1

2 Applications ........................................................... 1

3 Description ............................................................. 1

4 Revision History..................................................... 2

5 Pin Conguration and Functions ......................... 3

6 Specications......................................................... 5

6.1 Absolute Maximum Ratings ...................................... 5

6.2 ESD Ratings.............................................................. 5

6.3 Recommended Operating Conditions ....................... 5

6.4 Thermal Information.................................................. 6

6.5 Electrical Characteristics........................................... 6

6.6 Switching Characteristics: VCC = 3.3 V ±0.3 V ......... 8

6.7 Switching Characteristics: VCC = 5 V ±0.5 V ............ 9

6.8 Noise Characteristics .............................................. 10

6.9 Operating Characteristics........................................ 10

6.10 Typical Characteristics .......................................... 10

7 Parameter Measurement Information ................ 11

8 Detailed Description ............................................ 12

8.1 Overview ................................................................. 12

8.2 Functional Block Diagram ....................................... 12

8.3 Feature Description................................................. 12

8.4 Device Functional Modes........................................ 12

9 Application and Implementation ........................ 13

9.1 Application Information............................................ 13

9.2 Typical Application .................................................. 13

10 Power Supply Recommendations ..................... 15

11 Layout................................................................... 15

11.1 Layout Guidelines ................................................. 15

11.2 Layout Example .................................................... 15

12 Device and Documentation Support ................. 16

12.1 Documentation Support ........................................ 16

12.2 Related Links ........................................................ 16

12.3 Receiving Notication of Documentation Updates 16

12.4 Community Resources.......................................... 16

12.5 Trademarks ........................................................... 16

12.6 Electrostatic Discharge Caution............................ 16

12.7 Glossary ................................................................ 16

13 Mechanical, Packaging, and Orderable

Information ........................................................... 16

4 Revision History

NOTE: Page numbers for previous revisions may dier from page numbers in the current version.

Changes from Revision K (June 2013) to Revision L Page

• Added table, section, ,ESD Ratings Feature Description Device Functional Modes Application and Implementation

section, section, section, section, andPower Supply Recommendations Layout Device and Documentation Support

Mechanical, Packaging, and Orderable Information section. ................................................................................................. 1

• Deleted table; see at the end of the data sheet ......................................Ordering Information Package Option Addendum 1

• Changed Package thermal impedance, RθJA, value in table From: 86°C/W To: 92.6°C/W (D),Thermal Information

From: 96°C/W To: 107.3°C/W (DB), From: 127°C/W To: 134.6°C/W (DGV), From: 80°C/W To: 56.3°C/W (N), From:

76°C/W To: 89.9°C/W (NS), and From: 113°C/W To: 121.5°C/W (PW)................................................................................ 6

Changes from Revision J (December 1995) to Revision K Page

• Changed document format from Quicksilver to DocZone ...................................................................................................... 1

• Extended operating temperature range to 125°C................................................................................................................... 5