Overview: SN74HC168 High-Speed Synchronous Binary Counter
The SN74HC168 from Texas Instruments is a high-speed CMOS 4-bit synchronous binary counter with presettable inputs. It offers fast performance for digital sequencing and counting applications, while maintaining compatibility with TTL logic levels. Engineered to support clocked synchronous operation, the SN74HC168 provides superior reliability over asynchronous counters in timing-sensitive applications.
This IC is built into a compact DIP-16 package, making it ideal for standard through-hole mounting and prototyping environments. The device includes features such as a synchronous clear, asynchronous load, and carry output for cascading counters.
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Electrical Specifications and Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Function | Synchronous 4-Bit Binary Counter | – |
| Package | DIP-16 | – |
| Supply Voltage Range | 2 ?C 6 | V |
| Max Clock Frequency | 32 | MHz |
| Input Type | TTL/CMOS Compatible | – |
| Operating Temperature | -40 to +85 | ??C |
| Reset Type | Synchronous Clear | – |
| Load Type | Asynchronous Load | – |
| Carry Output | Yes | – |
Why Choose SN74HC168 Over Traditional Counter ICs?
The SN74HC168 offers distinct advantages in industrial and embedded applications. Unlike ripple counters, its synchronous operation ensures accurate timing without clock skew or propagation delays between bits.
Its asynchronous load allows pre-loading a specific count value during operation, providing flexibility in programmable timers. The device is also designed for ease of cascading, enabling the expansion of counting capacity with minimal external logic.
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Backed by the reliability of IC Manufacturer and the proven design excellence of Texas Instruments, this counter IC supports a wide array of timing and automation control systems.
Detailed Technical Parameters
| Feature | Description |
|---|---|
| Logic Family | HC (High-Speed CMOS) |
| Output Type | Non-inverting |
| Power Supply | Single Supply (2V to 6V) |
| Current Consumption | Low static current draw |
| Pin Count | 16 |
| Mounting Type | Through Hole |
Typical Applications of SN74HC168
- Digital counters in industrial PLCs
- Programmable timers in consumer electronics
- Event counters in automation and robotics
- Clock division and signal timing circuits
- Display sequencing in IoT edge devices
Frequently Asked Questions (FAQ)
What type of counter is the SN74HC168?
It is a synchronous 4-bit binary counter, meaning all bits change state simultaneously on the clock pulse, ensuring accurate timing.
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Is the SN74HC168 compatible with 3.3V systems?
Yes, its 2V to 6V supply range makes it compatible with both 3.3V and 5V logic systems commonly used in embedded electronics.
What distinguishes the SN74HC168 from ripple counters?
Unlike ripple counters, the synchronous architecture ensures that all outputs switch simultaneously, minimizing timing errors in high-speed logic circuits.
Can this IC be used in automotive-grade environments?
With its -40??C to +85??C temperature range and robust electrical characteristics, it is suitable for many automotive electronics applications.
How does the carry output function help in cascaded designs?
The carry output simplifies expanding the counter’s bit-width by chaining multiple ICs together, propagating the count sequence across devices.
