SN7474DR Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN7474DR is a TTL dual D-type positive edge-triggered flip-flop IC with preset and clear inputs, operating at up to 15 MHz in a 14-pin SOIC package. Each of the two flip-flop elements provides true and complementary outputs with 16 mA sink current capability. Available from stock worldwide at competitive prices.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- OBSOLETE
- Datasheet
- SN7474DR Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN7474DR?
- Dual D flip-flop with independent preset and clear inputs per element, enabling direct register initialization without relying on clock cycles
- Positive edge-triggered operation at up to 15 MHz, supporting reliable data latching in TTL-speed digital control and sequencing circuits
- 14-pin SOIC surface-mount package with 16 mA output sink current, compatible with standard TTL bus loads and indicator drive
What is SN7474DR used for?
The SN7474DR is widely used in digital logic design for data storage, register building, and frequency division by two, where its edge-triggered behavior ensures glitch-free state capture on the rising clock edge. It is applied in state machines, event counters, and synchronization circuits within industrial controllers, communication interfaces, and legacy TTL-based embedded systems. The dual-element configuration allows two independent storage bits in a single package, minimizing board space in register arrays and pipeline stages.
What are the specifications of SN7474DR?
| Pbfree Code | No |
| YTEOL | 0 |
| Family | TTL/H/L |
| JESD-30 Code | R-PDSO-G14 |
| Load Capacitance (CL) | 15pF |
| Logic IC Type | D FLIP-FLOP |
| Max Frequency@Nom-Sup | 15000000Hz |
| Max I(ol) | 0.016A |
| Number of Bits | 1 |
| Number of Functions | 2 |
| Output Polarity | COMPLEMENTARY |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Power Supply Current-Max (ICC) | 15mA |
| Prop. Delay@Nom-Sup | 40ns |
| Propagation Delay (tpd) | 40ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.25V |
| Supply Voltage-Min (Vsup) | 4.75V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 15MHz |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Where can I find the SN7474DR datasheet?
SN7474DR Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN7474DR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What type of flip-flop is the SN7474DR and how many are in the package?
The SN7474DR contains two independent D-type positive edge-triggered flip-flops in a single 14-pin SOIC package. Each element captures the data input on the rising clock edge and provides both true (Q) and complementary (Q-bar) outputs.
What is the maximum clock frequency of the SN7474DR?
The SN7474DR supports a maximum operating frequency of 15 MHz at nominal supply voltage, making it suitable for medium-speed TTL synchronous logic designs including counters, dividers, and state machine registers in embedded and industrial systems.
Does the SN7474DR have asynchronous preset and clear inputs?
Yes. Each flip-flop in the SN7474DR has active-low asynchronous preset and clear inputs that override the clock and data inputs to force the output to a known state immediately, regardless of clock activity. This is essential for initialization and reset sequences in digital circuits.
What package does the SN7474DR use?
The SN7474DR is housed in a 14-pin SOIC (Small Outline IC) package, JESD-30 code R-PDSO-G14, suited for surface-mount PCB assembly. The compact footprint and standard pin pitch of 1.27 mm make it compatible with automated pick-and-place manufacturing processes.
Is the SN7474DR RoHS compliant?
No. The SN7474DR has a Pbfree Code of 'No,' indicating it uses standard tin-lead solder finish and is not RoHS lead-free compliant. Designers requiring a RoHS-compliant alternative should look for the equivalent part with a lead-free suffix or the SN74HC74 CMOS replacement.
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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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