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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 |
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4.1 ★★★★★
Based on 83 reviews
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Product Reviews
★★★★★ 5
Good
Color: 2 Packs Croissants
The product is good. But my two dogs did not like. But urs may tryb
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Reviewed in the United States on May 24, 2026
★★★★★ 3
Good quality
Color: Croissant
The quality is good, the material is very hard and heavier than I expected. My dog is too smart for this. After the first time she figured out to just let it sit and melt then drink it up in 10 seconds.
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Great for Aggressive Chewers
Color: Octopus
Great great entertainment for aggressive chewers - frozen yogurt works wonderfully! Thank you! These pups have destroyed many a toy - yours is #1 Best toy/snack!
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Reviewed in the United States on June 6, 2026
★★★★★ 5
Love it
Color: Croissant
Dogs love it, I froze Greek yogurt in the container and kept both of them busy for about 10 minutes. Big dogs. Great for mind stimulation, great quality,
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Reviewed in the United States on March 6, 2026
★★★★★ 5
The Best!
Color: Croissant
Out of all the stuffable, freezable dog treat toys I’ve tried over many years with several dogs, this one is #1! So easy to clean and freezing the little goodie cup that you insert in to the toy is so much easier than trying to stuff a small hole! The extra little grooves on the outside I fill with no sugar no salt peanut butter and my pup loves it! This is a heavier toy, so not sure how a small dog would do picking it up or carrying it around, but our 45 lb guy has no problem! Seems like it is very durable and just might last forever!
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Reviewed in the United States on January 10, 2026