SN74LS161AN-NG Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
SN74LS161AN-NG is a synchronous 4-bit binary counter IC by Texas Instruments in a 16-pin PDIP package. Key specs: 4.75-5.25V supply, positive-edge triggered clock, synchronous clear and load functions. From $0.60, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- SN74LS161AN-NG Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Synchronous 4-bit binary counting with parallel load for flexible preset counting sequences
- Positive edge-triggered clocking ensures predictable timing in synchronous digital designs
- Synchronous clear function allows glitch-free reset without disrupting system clock
- 16-pin PDIP package provides easy breadboard prototyping and through-hole PCB assembly
Applications
The SN74LS161AN-NG is widely used in digital frequency dividers, address generators, and event counters in embedded systems and digital logic education platforms. Its synchronous load and clear features make it suitable for building programmable counters and sequencers in industrial control and test equipment. The device is a staple in legacy TTL-based designs requiring reliable 4-bit counting with minimal external components.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74LS161AN-NG:
Frequently Asked Questions
What counting range does the SN74LS161AN-NG support?
The SN74LS161AN-NG counts from 0 to 15 (4-bit binary), completing a full cycle of 16 clock pulses before rolling over. The parallel load input allows presetting any starting count value from 0 to 15 synchronously.
What package does the SN74LS161AN-NG use?
The SN74LS161AN-NG is housed in a 16-pin PDIP (Plastic Dual In-Line Package), which is suitable for through-hole PCB assembly and breadboard prototyping, making it a popular choice for educational and legacy design applications.
What are common applications of the SN74LS161AN-NG?
Common applications include frequency dividers, digital clock generation, address counters in memory systems, timing sequence generators, and programmable counters in industrial automation where synchronous TTL logic counting is required.
Does the SN74LS161AN-NG have a synchronous or asynchronous clear?
The SN74LS161AN-NG features a synchronous clear input, meaning the counter resets to zero on the next rising clock edge when the clear signal is asserted, ensuring glitch-free operation in synchronous digital systems.
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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.
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