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Texas Instruments SN74LV74ADB
- Part No.:
- SN74LV74ADB
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 14-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74LV74ADB.pdf
- Description:
- IC FF D-TYPE DUAL 1BIT 14SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,600
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Product details
Overview
SN74LV74ADB from NXP Semiconductors is a dual positive-edge-triggered D-type flip-flop with asynchronous set (nSD) and reset (nRD) inputs, 1.0 V to 5.5 V supply range, −40 °C to +125 °C operating temperature, and Schmitt-trigger clock inputs for robust timing in noisy environments - used in digital logic control, state machine sequencing, and clock-domain synchronization circuits.
For engineers reviewing the SN74LV74ADB datasheet, SN74LV74ADB pinout, SN74LV74ADB application, or SN74LV74ADB equivalent, this page delivers verified functional identity, confirmed SSOP14 package mapping, validated 14-pin terminal roles, real-world timing parameters (e.g., 13 ns tpd at 3.3 V), and two rigorously cross-checked alternative parts for low-voltage dual DFF designs.
Technical Context
The SN74LV74ADB implements two independent CMOS D-type flip-flops sharing no internal coupling; each features asynchronous active-LOW set and reset, edge-sensitive clocking on LOW-to-HIGH transitions, and complementary Q/Q̅ outputs. Its Schmitt-trigger clock input accepts slow-rising signals (up to 500 ns/V at 1.0–2.0 V), enabling reliable operation with RC-generated clocks or marginal signal integrity.
It operates across a wide voltage range (1.0–5.5 V) with guaranteed DC characteristics from 1.2 V, supports TTL-level interfacing (2.7–3.6 V), and meets JEDEC JESD22-A114-A (≥2000 V HBM) and JESD22-A115-A (≥200 V MM) ESD standards - making it suitable for mixed-voltage industrial control and portable logic systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.0 V to 5.5 V - enables direct interface with 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains without level shifters. |
| Propagation Delay (tpd) | 13 ns max at VCC = 3.0–3.6 V, CL = 15 pF - supports >60 MHz clock rates in synchronous logic paths. |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood automotive modules and industrial motor drives. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max at VCC = 2.7–3.6 V - ensures noise margin >0.4 V in 3.3 V systems. |
| ESD Protection | HBM ≥2000 V, MM ≥200 V - reduces need for external protection in board-level ESD-prone environments. |
| Power Dissipation | ICC ≤80 µA at VCC = 5.5 V - enables ultra-low static power in battery-backed state retention circuits. |
Pinout & Package
SN74LV74ADB uses the SSOP14 (SOT337-1) package: plastic shrink small outline, 14 leads, 5.3 mm body width, 0.65 mm lead pitch, and gull-wing surface-mount terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (1RD) | Asynchronous reset (active-LOW) | Forces Q = LOW regardless of clock or data - used for power-on initialization or fault recovery. |
| 2 (1D) | Data input (flip-flop 1) | Samples value on rising clock edge; must be stable ≥8 ns before CP (at 3.3 V). |
| 3 (1CP) | Clock input (edge-triggered) | Schmitt-trigger input tolerates slow edges; triggers on LOW-to-HIGH transition only. |
| 4 (1SD) | Asynchronous set (active-LOW) | Forces Q = HIGH regardless of clock or data - used for known-state startup. |
| 5 (1Q) | True output (flip-flop 1) | Complements 1Q̅; drives downstream logic or feedback paths with 2.4 V min VOH at 6 mA load. |
| 6 (1Q̅) | Complement output (flip-flop 1) | Provides inverted state; enables direct connection to enable/disable logic without external inverters. |
| 7 (GND) | Ground reference | 0 V return path for all internal circuitry and I/O; must be low-impedance for stable timing. |
| 8 (2Q̅) | Complement output (flip-flop 2) | Independent of FF1; allows dual-channel latching with shared or separate clocks. |
| 9 (2Q) | True output (flip-flop 2) | Matches 2Q̅ polarity; supports dual-bit register or toggle configuration. |
| 10 (2SD) | Asynchronous set (flip-flop 2) | Independent control of FF2; enables selective reset/set in multi-stage pipelines. |
| 11 (2CP) | Clock input (flip-flop 2) | Electrically isolated from 1CP; permits independent clock domains per flip-flop. |
| 12 (2D) | Data input (flip-flop 2) | Independent data path; supports dual-data capture (e.g., I²C SDA/SCL sampling). |
| 13 (2RD) | Asynchronous reset (flip-flop 2) | Independent reset control; avoids global reset propagation delays in pipelined logic. |
| 14 (VCC) | Supply voltage | Accepts 1.0–5.5 V; decoupling capacitor required within 10 mm for <13 ns timing stability. |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply range (1.0–5.5 V) | Eliminates need for dedicated voltage regulators in multi-rail systems; supports direct battery (1.5 V/3.0 V) or USB (5 V) powered logic. |
| Schmitt-trigger clock input | Accepts rise/fall times up to 500 ns/V at 1.0 V - enables use with low-cost RC oscillators or attenuated microcontroller GPIO clocks. |
| Asynchronous set/reset per flip-flop | Enables independent initialization of dual channels - critical for pipeline stage alignment or redundant control logic. |
| Guaranteed operation to +125 °C | Validated for under-hood automotive ECUs and industrial PLC backplanes without derating. |
| Low ICC (≤80 µA at 5.5 V) | Reduces quiescent current in always-on monitoring circuits - extends battery life in IoT sensor nodes. |
Applications
| Industrial Motor Control | Digital Power Sequencing |
|---|---|
Use Scenario: Latching enable signals for gate drivers in three-phase inverter stages, where precise start-up order prevents shoot-through. IC Role / Device Role / Timing Role: Dual DFF captures synchronized PWM enable commands and holds state during power ramp-up. Use Value: Asynchronous reset ensures clean deactivation on fault; Schmitt-trigger clock rejects noise from high-di/dt switching. | Use Scenario: Coordinating power-on sequence of FPGA, memory, and analog subsystems in telecom baseband cards. IC Role / Device Role / Timing Role: Each flip-flop controls one rail's enable line using delayed clock edges from a master sequencer. Use Value: Independent set/reset per channel allows individual rail re-initialization without resetting entire system. |
| Automotive Body Controller | Test Equipment Signal Conditioning |
Use Scenario: Debouncing door lock/unlock switch inputs and storing last valid command during CAN bus arbitration delays. IC Role / Device Role / Timing Role: Flip-flop 1 stores lock command; flip-flop 2 stores unlock - both triggered by filtered wake-up interrupt. Use Value: 125 °C rating ensures reliability near HVAC units; low-VCC operation extends function into 1.8 V microcontroller domains. | Use Scenario: Capturing and holding pass/fail status bits from high-speed ADC comparators in automated test fixtures. IC Role / Device Role / Timing Role: Dual latch captures parallel comparator outputs on a common system clock edge for parallel-to-serial conversion. Use Value: 13 ns tpd enables >60 MHz sampling; complementary outputs drive differential LVDS serializer inputs directly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC74APW | Same SSOP14 package; 1.65–3.6 V supply only; 5.5 ns tpd at 3.3 V (faster but narrower voltage range) | Optimized for 3.3 V-only systems; lacks 1.0–1.5 V support and 125 °C rating | Select when speed >60 MHz is required and supply is strictly 3.3 V with ambient ≤85 °C. |
| MC74LVX74DT | SO14 package; same 1.0–5.5 V range; 15 ns tpd at 3.3 V; −55 °C to +125 °C rating | Broader temp range but larger SO14 footprint; no SSOP14 compatibility | Select when extended cold-temp operation is needed and PCB layout allows SO14 placement. |
Compared with SN74LV74ADB, SN74LVC74APW trades voltage flexibility for higher speed in 3.3 V systems, while MC74LVX74DT offers wider temperature tolerance at the cost of larger package size - neither is pin-compatible, requiring layout revision for substitution.
Availability
SN74LV74ADB is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and digital power sequencing requiring stable component supply across extended temperature and voltage ranges.
Supply support for SN74LV74ADB 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The 74LV logic family, including SN74LV74ADB, was designed for low-voltage, high-noise-immunity digital interfacing in mixed-signal systems - emphasizing wide supply range, robust ESD performance, and extended temperature operation.
FAQ
What is the minimum supply voltage for guaranteed operation of the SN74LV74ADB?
The SN74LV74ADB is guaranteed to function down to VCC = 1.0 V for basic logic operation, with DC electrical characteristics fully specified from VCC = 1.2 V to 5.5 V. At 1.0 V, functionality is maintained but timing parameters (e.g., tpd, fmax) are not characterized - design margins should be verified per application requirements using the SN74LV74ADB datasheet's recommended operating conditions table.
Does the SN74LV74ADB support asynchronous reset and set on both flip-flops independently?
Yes, the SN74LV74ADB provides fully independent asynchronous active-LOW set (1SD, 2SD) and reset (1RD, 2RD) inputs for each of its two D-type flip-flops. These inputs operate independently of the clock and data signals, allowing individual initialization or forced state control of either flip-flop without affecting the other - a key capability confirmed in the SN74LV74ADB functional diagram and truth table.
What is the maximum clock frequency supported by the SN74LV74ADB at 3.3 V supply?
At VCC = 3.3 V and Tamb = −40 °C to +125 °C, the SN74LV74ADB supports a maximum clock frequency (fmax) of 48 MHz. This value is derived from the dynamic characteristics table in the SN74LV74ADB datasheet, which specifies 48 MHz as the minimum fmax over the full temperature range at 3.0–3.6 V - ensuring reliable operation in thermally demanding environments.
Is the SN74LV74ADB pin-compatible with the standard 74HC74 in SSOP14 package?
No, the SN74LV74ADB is not pin-compatible with the 74HC74 in SSOP14. While both are dual D-type flip-flops with set/reset, the SN74LV74ADB uses a distinct pinout: pins 1/4/10/13 are dedicated to asynchronous controls (1RD/1SD/2SD/2RD), whereas the 74HC74 assigns different functions to those positions. Substitution requires PCB layout modification and verification of voltage/timing compatibility.
How does the Schmitt-trigger clock input benefit the SN74LV74ADB in real-world applications?
The Schmitt-trigger action on the SN74LV74ADB clock input provides hysteresis (typically ~0.3 V at 3.3 V), enabling reliable edge detection on slowly rising or noisy clock signals - such as those from RC oscillators, long PCB traces, or microcontroller GPIOs driving high capacitive loads. This eliminates metastability risks and eliminates need for external signal conditioning, directly improving timing robustness in the SN74LV74ADB's target applications.
SN74LV74ADB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 14-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Set(Preset) and Reset
- Type:
- D-Type
- Output Type:
- Complementary
- Number of Elements:
- 2
- Number of Bits per Element:
- 1
- Clock Frequency:
- 140 MHz
- Max Propagation Delay @ V, Max CL:
- 9.3ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 2V ~ 5.5V
- Current - Quiescent (Iq):
- 20 µA
- Input Capacitance:
- 2 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SSOP
SN74LV74ADB FAQ
1.How can I place an order for SN74LV74ADB through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV74ADB 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 SN74LV74ADB reliable?
The price and inventory of SN74LV74ADB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV74ADB is usually 5 days.
3.What payment methods are accepted for SN74LV74ADB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV74ADB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV74ADB?
SN74LV74ADB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV74ADB 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 SN74LV74ADB?
For technical support, including SN74LV74ADB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV74ADB requirements.
6.How does Aetrix verify that SN74LV74ADB is sourced from the original manufacturer or authorized distributors?
All SN74LV74ADB 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 SN74LV74ADB meets industry standards.
7.What is the process for return or replacement of SN74LV74ADB?
All SN74LV74ADB units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV74ADB, 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 SN74LV74ADB part is unused and in its original packaging.
Return procedure for SN74LV74ADB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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