Pay in installments of $3.74 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Sep 18 - Sep 23
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
74191Synchronous Up Down Binary Counter Specifications Logic Family: TTL (74xx series) Function: 4 bit synchronous up down binary counter Package: 16 pin DIP Count Range: 0 to 15 (binary) Clock Input: Synchronous clock Count Direction Control: Up Down input Parallel Data Inputs: 4 (AD) Parallel Load: Active LOW load input Outputs: Q0Q3 Terminal Count Outputs: Ripple Carry (RC) Terminal Count (TC) for cascading Enable Inputs: Count enable control inputs
Synchronous Up/Down Binary Counter
Specifications
- Logic Family: TTL (74xx series)
- Function: 4-bit synchronous up/down binary counter
- Package: 16-pin DIP
- Count Range: 0 to 15 (binary)
- Clock Input: Synchronous clock
- Count Direction Control: Up/Down input
- Parallel Data Inputs: 4 (A–D)
- Parallel Load: Active LOW load input
- Outputs: Q0–Q3
- Terminal Count Outputs:
- Ripple Carry (RC)
- Terminal Count (TC) for cascading
- Enable Inputs: Count enable/control inputs
- Supply Voltage (Vcc): 4.75 V – 5.25 V (5 V nominal)
- Absolute Max Vcc: ~7 V
- Input Voltage Range: –0.5 V to Vcc
- Logic HIGH (VIH): ≥ 2.0 V
- Logic LOW (VIL): ≤ 0.8 V
- Output HIGH (VOH): ≥ 2.4 V
- Output LOW (VOL): ≤ 0.4 V
- Propagation Delay: ~20–35 ns typical
- Max Clock Frequency: ~25 MHz (typical TTL conditions)
- Power Dissipation: ~60 mW typical
- Operating Temperature: 0 °C to 70 °C
Feature
- Synchronous up/down counting
- Parallel preset capability
- Cascade connection for larger counters
- High-speed TTL operation
- Terminal count outputs for expansion
Typical Applications
- Digital counters
- Frequency division
- Position counting
- Timers
- Control systems and sequencing
Additional Information
| Keywords | Counter |
| Device | Counter |
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
4.3 ★★★★★
Based on 19 reviews
Sort
Product Reviews
★★★★★ 5
Bouncy, not hard, and good value.
Style: Fetch Balls (Pack of 10), Size: 2.5 inch
Great balls for the ball launcher and not rockhard like some of the solid rubber balls. These have great bounce, and because of the two holes, they make a fun whistling noise as they fly through the air. My dogs love them and they are a good value.
By the way, if you throw them too hard, they will go through chain-link and no climb fence because they squish a bit!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 16, 2026
★★★★★ 5
Excellent dog balls — safe design and very durable
Style: Fetch Balls (Pack of 3), Size: 2.5 inch
These fetch balls from Amazon Basics are fantastic, and my dog absolutely loves them. One of the biggest reasons I prefer these over other brands is the hole that runs through the center of the ball. This is a very important safety feature: if a dog were to accidentally get the ball stuck in the back of the throat, the hole allows air to pass through. That small detail could literally make a life-saving difference.
Aside from the safety benefit, they bounce well, are easy to clean, and hold up to a lot of playtime. They’re firm but not rock-hard, and my dog goes crazy for them. Great value, great quality, and a thoughtful design.
Highly recommended for dog owners who want a safer alternative to standard solid rubber balls.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 1, 2025
★★★★★ 5
Great ball for heavy chewers
Style: Assorted Balls (Pack of 3), Size: 2.5 inch
Great toy for my Doberman. She chews through tennis balls in about 15 minutes but these are very durable. She likes to chase them but also just chew on them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026
★★★★★ 5
Durable
Style: Fetch Balls (Pack of 2), Size: 3 inch
Very bouncy. I like the noise it makes when you throw it. Pretty durable. Good size. Dog loves to play with them. Good material. Easy to use.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 5, 2026
★★★★★ 4
My dog loves glowing fetch at night!
Style: Glow Balls (Pack of 3), Size: 2.5 inch
Fantastic. Sturdy. My dog loves them
Glow in the dark is great for fetch at night. I keep a flashlight with me because the glow doesn't last really long. But they charge very quickly and are really bright.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 22, 2026