SN74LS74AN-NG Texas Instruments In Stock
SN74LS74AN-NG is a dual D-type positive-edge-triggered flip-flop with preset and clear by Texas Instruments. Key specs: 5V supply, 14-pin DIP package, LS TTL logic family with 20 mA output sink current. From $0.45, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- —
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Dual D-type positive-edge-triggered flip-flop with independent preset and clear inputs for each flip-flop, enabling flexible synchronous and asynchronous control
- Low-power Schottky TTL (LS) logic family providing a balance of fast switching speed and reduced power consumption compared to standard TTL
- 14-pin DIP through-hole package compatible with standard IC sockets, ideal for prototyping, education, and legacy circuit maintenance
- Independent clock, data, preset, and clear pins for each flip-flop section, allowing two independent 1-bit storage elements in a single package
Applications
The SN74LS74AN-NG is used in digital sequential circuits for frequency division, data storage, and shift register construction in microprocessor support circuits, counters, and state machines. It is widely employed in educational electronics labs, legacy industrial control systems, and signal synchronization circuits where edge-triggered D flip-flop functionality is required. The asynchronous preset and clear inputs make it versatile for initializing system states on power-up or during reset sequences.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What type of flip-flop is the SN74LS74AN-NG and how many are in the package?
The SN74LS74AN-NG contains two independent D-type positive-edge-triggered flip-flops in a single 14-pin DIP package. Each flip-flop has its own clock, data, active-low preset, and active-low clear inputs, as well as complementary Q and Q-bar outputs, providing full independent control.
What logic family does the SN74LS74AN-NG belong to and what supply voltage does it require?
The SN74LS74AN-NG belongs to the 74LS (Low-power Schottky TTL) logic family and operates from a 5V supply voltage. The LS family offers improved power efficiency over standard 74S TTL while maintaining compatibility with all 74-series TTL and CMOS logic families operating at 5V.
What are the preset and clear inputs on the SN74LS74AN-NG used for?
The active-low preset (PRE) and clear (CLR) inputs on the SN74LS74AN-NG allow asynchronous forcing of the flip-flop output to logic 1 or logic 0 respectively, regardless of the clock state. These inputs are essential for initializing system state on power-up and for implementing synchronous reset circuits in digital designs.
What applications is the SN74LS74AN-NG commonly used in?
The SN74LS74AN-NG is used in divide-by-2 frequency dividers, serial-to-parallel data conversion, shift registers, state machine implementations, and data synchronization circuits. It is a foundational component in digital design education and is used in legacy industrial controllers, retro computing projects, and any application requiring reliable edge-triggered 1-bit data storage.
Is the SN74LS74AN-NG compatible with CMOS logic levels?
The SN74LS74AN-NG outputs are compatible with most CMOS logic families operating at 5V, including 74HCT series devices. However, its TTL input thresholds may require level shifting when interfacing with 3.3V CMOS logic. For 5V system designs, it interfaces directly with 74HC, 74HCT, 74LS, and 74S TTL family devices.
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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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