SN74ALS161BD Texas Instruments In Stock
SN74ALS161BD is a 4-bit synchronous binary counter with synchronous clear and parallel load by Texas Instruments. Key specs: 4-bit count, 25MHz typical clock frequency, 5V supply voltage, DIP-16 package. From $0.28, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- —
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- Price
- From $0.2800(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74ALS161BD?
- 4-bit synchronous binary counter with synchronous parallel load and clear
- High-speed ALS (Advanced Low-power Schottky) CMOS technology for reliable logic performance
- Synchronous clear and load operations minimize timing complexity in system design
- Compatible with TTL logic levels, ideal for direct interface with standard 5V logic systems
- Low propagation delay for high-frequency counting applications up to 25MHz
What is SN74ALS161BD used for?
The SN74ALS161BD is widely used in digital timing circuits, frequency dividers, and event counters in industrial control systems and embedded electronics. It is suitable for address generation in memory interfacing, clock division in communication systems, and sequencer circuits in programmable logic designs. Its synchronous operation makes it an excellent choice for applications requiring predictable, glitch-free counting behavior.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
What are equivalent replacements for SN74ALS161BD?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum clock frequency of the SN74ALS161BD?
The SN74ALS161BD supports a typical maximum clock frequency of 25MHz, making it suitable for high-speed digital counting applications. Its ALS technology ensures low propagation delay and reliable performance at these frequencies.
What are typical applications for the SN74ALS161BD?
The SN74ALS161BD is commonly used in digital counters, frequency dividers, event counters, address generators for memory interfaces, and sequencer logic circuits in industrial and embedded systems. Its synchronous clear and load functions make it versatile for a wide range of timing and control applications.
What package does the SN74ALS161BD come in and what is its supply voltage?
The SN74ALS161BD is available in a DIP-16 (BDIP) through-hole package, which is well-suited for prototyping and traditional PCB assembly. It operates on a standard 5V supply voltage, compatible with TTL and ALS logic families.
What is the difference between synchronous clear and asynchronous clear in the SN74ALS161BD?
The SN74ALS161BD features a synchronous clear input, meaning the counter resets to zero on the next rising clock edge when the clear signal is asserted. This differs from asynchronous clear, which would immediately reset the counter regardless of the clock, providing more predictable and glitch-free operation in synchronous designs.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.6000 | $0.60 |
| 41+ | $0.4000 | $16.40 |
| 151+ | $0.2800 | $42.28 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”