The 74HC is identical in pinout to the LS The device inputs dimensions section on page 3 of this data sheet. ORDERING INFORMATION. 74hc Flip Flops are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for 74hc Flip Flops. The MM74HC high speed octal D-type flip-flops utilize advanced silicon-gate P-well CMOS technology. They pos- sess the high noise immunity and low.

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(PDF) 74HC574 Datasheet download

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Can any one tell me if the 74HC replaces the 74LS in a circuit of a frequency counter? I looked at their data sheet and found out they are similar regardless their pin out, may be i’m missing some the big picture ao that’s why i’m asking precisely if they do function the same, thanks for any info that helps. This mainly due dataseet Vih min threshold can exceed Voh guaranteed if driven by another 74LSxx part and differences in the Disable function.

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74HC Datasheet PDF – Philips Electronics

THe reason the part numbers changed root number xxx is due to the functional differences in output enable to tri-state for the HC version. But yes they more or less perform the same tasked as a gated 8 bit D latch, except the difference in functions are The HC version is output tri-state enabledwhile the data input clock latch is always active. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

Home Questions Tags Users Unanswered. Look at thresholds and speeds.

In logic terms, yes. Loaded LS outputs are not guaranteed to be able to drive HC inputs.

74hc pinout datasheet & applicatoin notes – Datasheet Archive

Even unloaded outputs aren’t consistent, unless you use a pullup resistor. Does 74HC replaces the 74LS?

If this implies can it be blindly substituted for an existing design using 74LS part? NO This mainly due to Vih min threshold can exceed Voh guaranteed if driven by another 74LSxx part and differences in the Datashet function.

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The LS version is enables changes on input data xatasheet be clocked while the output is always active The HC version is output tri-state enabledwhile the data input clock latch is always active. Tony EE rocketscientist 62k 2 21 Sign up or log in Sign up using Google. Sign up using Facebook.

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