Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
74HC688Comparator ID 8 BIT 20PD(18) Feature Basic Information: Type: Parallel Priority Encoder Family: 74HC (High Speed CMOS) Function: Converts 8 input lines into a 3 bit binary output, providing priority to the highest order active input. Pin Configuration: Inputs: A0 to A7 (8 inputs) Outputs: Y0, Y1, Y2 (3 bit binary output) Control Inputs: G (Enable): Activates the device. A (Active Low): When low, it allows the encoder to function. Operation: The
Comparator ID 8-BIT 20PD(18)
Feature
Basic Information:
- Type: Parallel Priority Encoder
- Family: 74HC (High-Speed CMOS)
- Function: Converts 8 input lines into a 3-bit binary output, providing priority to the highest-order active input.
Pin Configuration:
- Inputs: A0 to A7 (8 inputs)
- Outputs: Y0, Y1, Y2 (3-bit binary output)
Control Inputs:
- G (Enable): Activates the device.
- A (Active Low): When low, it allows the encoder to function.
Operation:
- The 74HC688 encodes the highest priority active input (from A0 to A7) into a binary output.
- If no inputs are active, the outputs are set to a predefined state (usually all low).
Electrical Characteristics:
- Supply Voltage (Vcc): Typically operates at 2V to 6V.
- High Level Input Voltage (VIH): Minimum value required for a high logic level.
- Low Level Input Voltage (VIL): Maximum value for a low logic level.
- Output High Voltage (VOH): Minimum value for a high output.
- Output Low Voltage (VOL): Maximum value for a low output.
Additional Information
| Device | Comparator |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 1633 reviews
Sort
Product Reviews
★★★★★ 5
Good reading
Format: Hardcover
How could you go wrong with a book like this? Great for kids and adults alike
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 22, 2026
★★★★★ 5
Such an Adorable Book
Format: Kindle
This book was one I originally borrowed on Kindle to read to my twin niece and nephew to hopefully help them stop fighting. The book was so adorable, I bought it for Kindle to make sure I always had a copy. While the message is great, treating others with kindness, the illustrations and rhymes are what make it unique. There are some larger words used, but they are all in a clear context to help build vocabulary. The twins loved the farm animals and I actually used the book as part of a lesson on kindness for my Sunday school class who also enjoyed it. Even though I already have the Kindle version, I am ordering paper copies to give as Christmas gifts this year. I love this author, the illustrations, and the message. This is the type of children's book everyone can enjoy and agree on.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 27, 2021
★★★★★ 5
Bonito y fácil de leer
Format: Paperback
Es un libro muy bonito, fácil de leer, entretenido. A mi niño le gustó mucho.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 14, 2026
★★★★★ 5
A must book for children
Format: Paperback
I got this book 15 years ago at a garage sale and it was one of my kids favorite books of all time. We took it with us everywhere we went (in the car, on vacation etc). My daughter is now in her 20's and she works at a daycare center. She wanted to get some books for their library and when I reminded her of this book she had to get it for them. It has quickly become the classroom favorite, the children ask for her to read it to them daily.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 5, 2025
★★★★★ 5
charming and fun guessing game for little ones
Format: Paperback
charming and fun guessing game for little ones. my daughter is 15 months old and loves this book, we have to read it everyday. the drawings are so charming, we also play our own observation games, like there is a little ladybug on every page and I ask her where is the ladybug and she can always find it!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 2, 2015