• • 10/28/2024
  • TI-CSC

  SN74AHC8541: 1-bit Register Single-Chip Solution

  Part Number: SN74AHC8541

  Tool/software:

  Hello E2E Experts,

  Good day.

  Is there a single-chp solution that performs similarly to the schematic below?

  

  That is a 1-Bit Register, with Read (On Clock), Write, Clear and Invert.

  I've attached images of 8 of these 1-Bit registers in parallel operation.

  With the expected pins being Vcc, Data In, Read, Write, Clock, Clear, Invert and Ground.

  In operation this register requires the assistance of external latches, but those tend to change based on the need.

  Currently I am using 2x Quad 2-Input AND, 1x Quad 2-Input OR and 1x the Hex Inverter

  
  Regards,

  TI-CSC

  Logic forum Logic
• • 6/18/2019
  • user4773172

  SN74AHC8541: Inquire customer SCH concern

  Part Number: SN74AHC8541

  Hi Sir,

  May I have your help on following question from my customer?

  1. Please refer SCH from customer, when the Host pull low, SN74AHC8541 output be pulled low to reset other device, is there any concern that SN74AHC8541 will be damaged by discharge current from C5? (Please be noted that R5, R6, C6 and 66ohm can't be changed)

  

  2. May I know what the definition of Low-level output current? What is the Y pin current-sinking capability when output pull-low?

  

  3. May I confirm with you that there is push-pull circuit inside the Y pin to control the high/low? What resistor value of Y pin during pull-low status?

  Thank you.

  Edward Chen

  Logic forum Logic
• • 6/20/2019
  • Shuji Ishiwata

  SN74AHC8541: Protection circuit in Y pin

  Part Number: SN74AHC8541

  Hi Team,

  I have a question at SN74AHC8541.

  
  Is there a protection circuit in Y pin? For example, ESD protection circuit.
  If there is a protection circuit, is it VDD or GND? Or both?
  If the Ypin is broken, is it open or short?

  
  Best Regards,
  Ishiwata

  Logic forum Logic
• • 7/21/2022
  • Tsuyoshi Makino

  SN74AHC541：undershoot for about 5ns

  Part Number: SN74AHC541

  Hi. Team.

   

  I’m using SN74AHC541N , SN74AHC8541N , SN74HC273N and SN74AHC273PWR.

   

  I have some questions to undershoot of VI and VO.

  The undershoot may be exceeded -0.5V in the application. which exceeding abs max rating of VI and VO.

   

  Each devices datasheet say  “The input and output voltage ratings may be exceeded if the input and output current ratings are observed.” .

   

  So I believe each device can exceed -0.5V as long as IIK and IOK are lower than -20mA and ±20mA respectively.

  It is my understanding. correct?

  If so , could you advise damping resistor value to suppress the current for each devices?

   

   

  Thanks.

   

  Regards,

   

  Tsuyoshi

  Logic forum Logic

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