Community. An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications. 74HCTD, Nexperia Buffers & Line Drivers OCTAL BUFFER 3-STATE datasheet, inventory, & pricing. 74HC; 74HCT Octal buffer/line driver; 3-state. Rev. 03 — 22 December Product data sheet. Table 1: Quick reference data. GND = 0 V; Tamb =

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Important Information for this Arm website This site uses cookies to store information on your computer. Export might require a prior authorization from competent authorities. The substrate is attached to this pad using conductive die attach material. Thanks all, with an added cheer for Hexley dominating the mbed challenge!

And it’s datasheeet in an easy-to-use datashdet package. No offer to sell or license — Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights.

The device features two output enables 1 OE and 2 OEeach controlling four of the 3-state outputs.

74HCTD – Nexperia – PCB Footprint & Symbol Download

As a result magic translators tend to have limited drive or are open-drain with a pull up. Search Search Cross reference Parametric search. All referenced brands, 74hcg244d names, service names and trademarks are the property of their respective owners. Actually, it’s just the opposite.

74HC244; 74HCT244 Octal Buffer, Line Driver; 3-state

NXP Semiconductors takes no responsibility for the content in this document if provided by an information source outside of NXP Semiconductors.

Applications — Applications that are described herein for any of these products are for illustrative purposes only. These are also nice level converters and in DIP package available too: The latest product status information is available on the Internet at URL http: You do not have the correct permissions to perform this operation.

Access Warning You do not have the correct permissions to perform this operation. Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. There is no electrical or mechanical requirement to solder this pad. For output direct connection without problems. But I attribute this to lack of coffee – I should have verified my claims: The problem is that generally you can detect a pin going to or from tristate OR transmit to the pin, but not both.


Table 7 on page 45 gives the following limits for standard port pins: A digital pin can drive 40mA, up to a total of mA. Given that the LPC, and much other 3.

Constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. HC, or look for some with schmitt-trigger. I’ve seen discrete versions of bidirectional level translators consisting of just one FET. However, if it is soldered, the solder land should remain floating or be connected to GND.

Please, contact us at support mbed. Product [short] data sheet Production This document contains the product specification. Normally for input I connect direct or with a resistor divider. The device can datasheet used as two 4-bit buffers or one 8-bit buffer. I tried several HCT buffer type parts and all of them worked!

Limiting values — Stress above one or more limiting values as defined in the Absolute Maximum Ratings System of IEC will cause permanent damage to the device.

All information provided in this document is subject to legal disclaimers. In no event shall NXP Semiconductors be liable for any indirect, incidental, punitive, special or consequential damages including – without limitation – lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges whether or not such damages are based on tort including negligencewarranty, breach of contract or any other legal theory.

It is neither qualified nor tested in accordance with automotive testing or application requirements. But I wouldn’t rely on “typical” values if you want a robust design. I notice that the 74LVC8T mentioned above has a direction pin, and does not rely on auto-sensing.


For detailed and full information see the relevant full data sheet, which is available on request via the local NXP Semiconductors sales office. Contents 1 2 3 4 5 5. If your external devices are of 74HC or 74LS series, you can connect them safely and they will work reliably. Run HCT parts on 5V and directly drive the inputs from 3.

Sample As a Nexperia customer you can order samples via our sales organization or directly via our Online Sample Store: Inputs include clamp diodes that enable the use of current limiting resistors to interface inputs to voltages in excess of VCC.

However, NXP Semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information.

However the mopst popular device in my arsenal, which will translate both ways, from a variety of voltages to a variety of voltages is the 74LVC8T If available you can find information in our Nexperia Support Community or you can find Nexperia models and Design tools.

So a 74 HCT is indeed the proper choice. Find answers to your design questions on this page. Preliminary [short] data sheet Qualification This document contains data from the preliminary specification. IEC logic symbol All information provided in this document is subject to legal disclaimers. A short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information.

74HCT244 Octal buffer/line driver

This document supersedes and replaces all information supplied prior to the publication hereof. The content is still under internal review and subject to formal approval, which may result in modifications or additions. As Hendrik has found, it happens that HC parts also work much of the time, since at room temperature their “typical” spec for VIH actually falls below their guaranteed “minimum” spec of 3.

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