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Texas Instruments SN74LV174AD
- Part No.:
- SN74LV174AD
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74LV174AD.pdf
- Description:
- IC FF D-TYPE SNGL 6BIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,024
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Product details
Overview
SN74LV174AD from Texas Instruments is a hex D-type positive-edge-triggered flip-flop with asynchronous clear, designed for 2 V to 5.5 V operation, featuring 7.5 ns maximum propagation delay at 5 V, Ioff support for partial-power-down mode, and mixed-mode voltage interface capability. It serves as a synchronous data latch in LED matrix and 7-segment display drivers.
For engineers reviewing the SN74LV174AD datasheet, SN74LV174AD pinout, SN74LV174AD application, or SN74LV174AD equivalent, key selection criteria include its 16-pin SOIC (D) package, 6-bit edge-triggered storage function, guaranteed timing across 2.5 V/3.3 V/5 V supply rails, and compatibility with 5-V-tolerant inputs in mixed-voltage systems.
Technical Context
The SN74LV174AD implements six independent D-type flip-flops sharing a common clock (CLK) and asynchronous clear (CLR) input. Each stage latches data on the rising edge of CLK while CLR forces all Q outputs low regardless of clock state. Its CMOS push-pull outputs provide balanced sourcing/sinking capability up to ±25 mA per pin.
It supports partial-power-down via Ioff, which disables all outputs when VCC = 0 V, limiting leakage to ≤5 µA. Input thresholds scale with VCC (VIH = 0.7×VCC, VIL = 0.3×VCC), enabling interoperability between 3.3 V logic domains and 5 V peripherals without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - enables direct use in 2.5 V, 3.3 V, and 5 V systems without external regulators |
| tpd (max) | 7.5 ns at 5 V - ensures sub-10 ns timing margin for 100 MHz clock domains with light loads |
| Ioff Leakage | ≤5 µA at VCC = 0 V - prevents backfeeding and signal corruption during hot-swap or power sequencing |
| Input Voltage Tolerance | VI up to 5.5 V - allows 5 V signals to drive inputs even when VCC = 2.5 V or 3.3 V |
| Output Drive | ±25 mA per output - sufficient to directly drive LEDs or small logic loads without buffers |
| Operating Temp | –40°C to +85°C - qualified for industrial ambient environments without derating |
| ESD Rating | HBM ±2000 V - meets standard handling requirements for automated assembly lines |
Pinout & Package
SN74LV174AD is supplied in a 16-pin SOIC (D) package measuring 9.00 mm × 3.90 mm with standard 1.27 mm lead pitch. The body height is ≤2.00 mm, compatible with IPC-7351B SOIC-16 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLR | Asynchronous reset input | Active-low global clear: forces all six Q outputs low independently of CLK |
| CLK | Clock input | Rising-edge sensitive; triggers simultaneous capture of all six D inputs into respective Q outputs |
| 1D–6D | Data inputs | Independent D inputs for each of six flip-flop stages; accept 5 V-tolerant logic levels |
| 1Q–6Q | True outputs | Non-inverting registered outputs; each sourced/sunk with ±25 mA capability |
| GND | Ground reference | Primary return path for all internal logic and output currents; must be low-impedance |
| VCC | Power supply | Single-supply rail supporting 2 V–5.5 V; bypassing with 0.1 µF capacitor required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-voltage interface | 5-V-tolerant inputs allow connection to legacy 5 V buses while operating from 2.5 V or 3.3 V supplies |
| Partial-power-down (Ioff) | Outputs enter high-impedance state with ≤5 µA leakage when VCC = 0 V - critical for system-level power gating |
| Low ground bounce (VOLP) | <0.8 V at VCC = 3.3 V - reduces noise coupling into shared ground planes in dense PCB layouts |
| Latch-up immunity | Exceeds 250 mA per JESD17 - eliminates risk of destructive latch-up under transient overvoltage conditions |
| Wide temperature range | –40°C to +85°C operation without performance degradation - suitable for uncontrolled industrial enclosures |
Applications
| LED Matrix Control | 7-Segment Display Driver |
|---|---|
Use Scenario: Driving rows/columns of multiplexed LED arrays in signage or status panels. IC Role / Device Role / Timing Role: Hex flip-flop provides synchronized column enable latching with precise timing control via shared CLK and CLR. Use Value: Eliminates ghosting by ensuring all column drivers switch simultaneously; Ioff prevents current leakage during blanking intervals. | Use Scenario: Latching digit segments in multi-digit 7-segment displays for instrumentation or HMI panels. IC Role / Device Role / Timing Role: Stores segment patterns for each digit position; CLR resets display during digit change transitions. Use Value: Enables flicker-free static display rendering using minimal MCU GPIOs; 5-V-tolerant inputs simplify interface to microcontroller ports. |
| Industrial I/O Expansion | Programmable Logic Interface |
Use Scenario: Adding synchronous digital outputs to PLC modules or sensor interface boards. IC Role / Device Role / Timing Role: Acts as a 6-bit output register synchronized to system clock domain; CLR provides hardware-initiated reset. Use Value: Provides deterministic update timing for safety-critical outputs; ±25 mA drive supports direct relay coil or optocoupler interfacing. | Use Scenario: Interfacing FPGA or CPLD configuration data paths requiring registered input staging. IC Role / Device Role / Timing Role: Buffers and synchronizes control signals (e.g., address strobes, enable pulses) before routing to logic fabric. Use Value: Mitigates metastability in asynchronous crossings; low tpd preserves setup/hold margins in high-speed logic designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LV574AD | Octal D-type with 3-state outputs; no CLR pin; higher drive (±32 mA); same VCC range | Requires external reset logic; suited for bus-hold applications where output tri-stating is needed | Select when 8-bit width and output enable are required over 6-bit + dedicated clear |
| 74LVC174AD | Same pinout/function but rated only to 3.6 V VCC max; lower tpd (6.7 ns @ 3.3 V); identical Ioff | Not suitable for 5 V systems; better performance in 3.3 V-only designs with tighter timing budgets | Prefer for cost-sensitive 3.3 V applications where 5 V tolerance is unnecessary |
Compared with SN74LV574AD and 74LVC174AD, the SN74LV174AD uniquely combines 6-bit width, dedicated asynchronous clear, 5-V-tolerant inputs, and full 2–5.5 V operation - making it optimal for industrial display and I/O expansion where robust reset behavior and mixed-voltage interoperability are essential.
Availability
SN74LV174AD is available at Aetrix Electronics and suitable for LED matrix control, 7-segment display driver circuits, and industrial I/O expansion requiring stable component supply across extended temperature ranges and mixed-voltage environments.
Supply support for SN74LV174AD includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a U.S.-based semiconductor company specializing in analog and embedded processing technologies, with leadership in logic, power management, and signal chain products.
The SN74LV174AD belongs to TI's LV-A family of low-voltage, high-speed CMOS logic devices engineered for industrial and automotive applications demanding wide supply range, robust ESD immunity, and reliable operation across temperature extremes.
FAQ
What is the maximum clock frequency supported by the SN74LV174AD?
The SN74LV174AD supports up to 240 MHz maximum operating frequency at VCC = 5 V with CL = 15 pF load, as specified in the switching characteristics table. At 3.3 V, fmax drops to 170 MHz under the same conditions. These values assume proper layout, decoupling, and signal integrity - actual system-level frequency may be limited by board parasitics and load capacitance.
Does the SN74LV174AD require external pull-up or pull-down resistors on unused inputs?
Yes - all unused inputs of the SN74LV174AD must be tied to either VCC or GND to prevent floating states that cause increased power consumption, logic instability, or potential damage. This requirement is explicitly stated in Section 6.3 of the datasheet and applies to any unconnected D, CLK, or CLR pins in partial-use configurations.
Can the SN74LV174AD drive LEDs directly without current-limiting resistors?
No - the SN74LV174AD must always be used with external current-limiting resistors when driving LEDs. Although its outputs support ±25 mA, sustained current above 6 mA per output (per electrical characteristics at 3 V) risks exceeding safe operating area limits and thermal stress. Resistors ensure compliance with VOL/VOLP specifications and prevent latch-up under overload.
Is the SN74LV174AD pin-compatible with older 74LS174 or 74HC174 devices?
No - while the SN74LV174AD shares identical logic functionality and pin assignment (16-pin SOIC), it is not electrically pin-compatible with 74LS174 (TTL) or 74HC174 (higher-drive CMOS). Differences in input thresholds, output drive strength, and VCC range mean direct substitution requires verification of voltage translation, timing margins, and fan-out loading in the target circuit.
What is the purpose of the Ioff specification in the SN74LV174AD?
The Ioff specification defines the maximum leakage current (≤5 µA) that flows through SN74LV174AD outputs when VCC = 0 V. This feature enables safe partial-power-down operation - for example, during hot-plug events or multi-rail power sequencing - by preventing back-driving of powered sections of the system through the device's I/O pins.
SN74LV174AD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 6
- Clock Frequency:
- 180 MHz
- Max Propagation Delay @ V, Max CL:
- 9.2ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 2V ~ 5.5V
- Current - Quiescent (Iq):
- 20 µA
- Input Capacitance:
- 1.7 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SN74LV174AD FAQ
1.How can I place an order for SN74LV174AD through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV174AD on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74LV174AD reliable?
The price and inventory of SN74LV174AD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV174AD is usually 5 days.
3.What payment methods are accepted for SN74LV174AD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV174AD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV174AD?
SN74LV174AD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV174AD order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74LV174AD?
For technical support, including SN74LV174AD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV174AD requirements.
6.How does Aetrix verify that SN74LV174AD is sourced from the original manufacturer or authorized distributors?
All SN74LV174AD products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74LV174AD meets industry standards.
7.What is the process for return or replacement of SN74LV174AD?
All SN74LV174AD units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV174AD, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74LV174AD part is unused and in its original packaging.
Return procedure for SN74LV174AD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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