My Inquiry
My Account
STMicroelectronics 74LVQ74TTR
- Part No.:
- 74LVQ74TTR
- Manufacturer:
- STMicroelectronics
- Category:
- Flip Flops
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LVQ74TTR.pdf
- Description:
- IC FF D-TYPE DUAL 1BIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,216
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74LVQ74TTR from STMicroelectronics is a low-voltage CMOS dual D-type flip-flop with asynchronous preset and clear, operating from 2V to 3.6V supply. It delivers symmetrical output drive (±12 mA), balanced propagation delays (tPLH ≅ tPHL), and 250 MHz max clock frequency at 3.3V - enabling reliable data latching in high-speed 3.3V digital interfaces such as PCI bus drivers and clock-synchronized control logic.
For engineers reviewing the 74LVQ74TTR datasheet, 74LVQ74TTR pinout, 74LVQ74TTR application, or 74LVQ74TTR equivalent, key selection criteria include guaranteed PCI bus drive capability (24 mA), 75Ω transmission line compatibility, sub-10 ns propagation delay at 3.3V, ESD immunity (2 kV), and pin/function compatibility with standard 74-series logic.
Technical Context
The 74LVQ74TTR implements two independent edge-triggered D flip-flops, each with asynchronous active-low preset (1PR/2PR) and clear (1CLR/2CLR) inputs, triggered on the rising edge of CK. Its C2MOS process ensures latch-up immunity and low-noise operation (VOLP = 0.2 V typical).
All inputs and outputs feature integrated ESD protection (2 kV HBM), and DC specifications are fully guaranteed across –55°C to +125°C. The device supports data retention down to 1.2V and meets strict dynamic noise limits for mixed-signal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating Range | 2.0 V to 3.6 V - enables direct interface with 3.3V LVTTL and mixed-voltage systems; 1.2V data retention supports low-power suspend modes. |
| fMAX | 250 MHz (typ.) at VCC = 3.3V - supports high-throughput data sampling in timing-critical control paths. |
| tPLH / tPHL | 6.3 ns / 6.3 ns (typ.) at VCC = 3.3V - ensures deterministic setup/hold timing margins in synchronous state machines. |
| IOL / IOH | ±12 mA (min.) at VCC = 3.0V - drives 75Ω transmission lines directly without external termination or buffers. |
| VOLP | 0.2 V (typ.) at VCC = 3.3V - minimizes switching noise coupling into adjacent analog or RF sections. |
| ICC Quiescent | 2 µA (max.) at TA = 25°C - reduces standby power in battery-backed or always-on logic subsystems. |
| ESD Immunity | 2 kV HBM - eliminates need for external TVS diodes in board-level ESD protection schemes. |
Pinout & Package
TSSOP-14 package (JEDEC MO-153, 4.4 mm × 5.0 mm × 1.05 mm height), lead pitch 0.65 mm, RoHS-compliant matte tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 | 1CLR, 2CLR | Asynchronous active-low reset - forces Q = LOW independently of clock; critical for system initialization and fault recovery. |
| 2, 12 | 1D, 2D | Data input - sampled on rising clock edge; must be stable ≥3.0 ns before and ≥2.0 ns after CK transition per AC specs. |
| 3, 11 | 1CK, 2CK | Positive-edge-triggered clock - synchronizes data transfer; minimum pulse width 3.0 ns HIGH/LOW required. |
| 4, 10 | 1PR, 2PR | Asynchronous active-low set - forces Q = HIGH regardless of clock; used for known-state assertion in control sequencers. |
| 5, 9 | 1Q, 2Q | True output - reflects stored D value after clock edge; drives loads up to 24 mA (PCI-compliant). |
| 6, 8 | 1Q̄, 2Q̄ | Inverted output - complements Q; enables differential signaling or complementary logic gating without external inverters. |
| 7 | GND | Digital ground reference - must be low-impedance connection to minimize ground bounce during simultaneous switching. |
| 14 | VCC | Positive supply - decoupling capacitor (100 nF ceramic) required within 5 mm for stable high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| PCI Bus Level Compliance | Guaranteed 24 mA drive strength supports direct interfacing with legacy PCI slot signaling requirements. |
| 75Ω Transmission Line Drive | Enables point-to-point routing over controlled-impedance traces without series termination resistors. |
| Symmetrical Output Impedance | |IOH| = IOL = 12 mA (min.) ensures matched rise/fall times and reduced signal distortion. |
| Low Dynamic Noise (VOLP) | 0.2 V typical quiet-output noise allows co-location with sensitive analog or RF circuitry. |
| Extended Temperature Range | –55°C to +125°C operation validated - suitable for automotive under-hood and industrial motor-control applications. |
Applications
| PCI Bus Interface Logic | Digital Control Sequencing |
|---|---|
Use Scenario: Latching address/data strobes and command signals in 32-bit 33 MHz PCI add-in cards. IC Role / Device Role / Timing Role: Dual D flip-flop provides synchronized capture of parallel bus signals with precise edge alignment and glitch-free output hold. Use Value: Eliminates need for external level shifters or buffer ICs due to native 3.3V PCI-compliant drive and TTL-compatible outputs. |
Use Scenario: State register in programmable logic controllers managing solenoid actuation timing and sensor feedback loops. IC Role / Device Role / Timing Role: Stores control bits for real-time I/O states; asynchronous preset/clear enables immediate emergency shutdown or startup initialization. Use Value: Sub-10 ns propagation and 2 kV ESD immunity ensure deterministic response and field reliability in electrically noisy factory environments. |
| High-Speed Data Acquisition | Industrial Clock Distribution |
Use Scenario: Sampling parallel ADC outputs in oscilloscope front-ends where multi-channel synchronization is required. IC Role / Device Role / Timing Role: Captures concurrent 8-bit or 16-bit digital samples on a common clock edge with matched tPLH/tPHL. Use Value: Balanced delays (<1 ns skew) preserve inter-channel timing integrity for accurate waveform reconstruction. |
Use Scenario: Fan-out and level translation of master clock signals to multiple FPGA configuration or DSP timing domains. IC Role / Device Role / Timing Role: Buffers and retimes clock edges while maintaining duty cycle symmetry and minimizing jitter accumulation. Use Value: 75Ω drive capability and low VOLP reduce reflections and crosstalk when distributing clocks across PCB backplanes. |
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 |
|---|---|---|---|
| SN74LVC74APWR | Wider VCC range (1.65–5.5V); higher ICC (10 µA max); no guaranteed 24 mA PCI drive. | Better suited for mixed-voltage systems (1.8V/2.5V/3.3V/5V), but lacks PCI compliance margin. | Select when voltage flexibility outweighs PCI-level drive assurance. |
| 74AUP2G74DC | Ultra-low power (ICC = 0.9 µA typ.), but lower drive (4 mA), slower fMAX (125 MHz), and narrower temp range (–40°C to +125°C). | Optimized for portable battery-powered logic, not industrial or bus-interface use. | Select only for ultra-low-quiescent applications where speed and drive are secondary. |
Compared with SN74LVC74APWR and 74AUP2G74DC, the 74LVQ74TTR uniquely combines PCI-compliant 24 mA drive, 250 MHz speed, and –55°C to +125°C operation - making it the only choice for ruggedized 3.3V bus interface and industrial control latching.
Availability
74LVQ74TTR is available at Aetrix Electronics and suitable for PCI bus interface design, industrial control sequencing, high-speed data acquisition, and clock distribution requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for 74LVQ74TTR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management ICs with vertical manufacturing capabilities and broad IP portfolio.
The 74LVQ series targets low-voltage, high-speed logic applications in industrial automation and communications infrastructure, emphasizing noise immunity, bus compatibility, and extended temperature resilience.
FAQ
Is the 74LVQ74TTR pin-compatible with standard 74HC74 or 74LS74 devices?
Yes - the 74LVQ74TTR maintains identical pinout and logic function (dual D-type with preset/clear) as 74-series 7474 variants. However, it operates only from 2V–3.6V and is not 5V-tolerant; direct replacement requires confirming system VCC and input voltage levels.
Does the 74LVQ74TTR support hot-swap or live-insertion on a powered backplane?
No - the device lacks Ioff (power-off protection) and bus-hold features. Applying inputs while VCC = 0V may cause excessive current flow through internal clamps. Power sequencing must ensure VCC is stable before asserting any input signals.
What is the maximum capacitive load the 74LVQ74TTR can drive while maintaining 250 MHz operation?
AC characteristics (including fMAX) are specified with CL = 50 pF. Driving >50 pF increases propagation delay and skew; for >100 pF loads, derate fMAX to ≤120 MHz and verify timing margins using worst-case tPLH/tPHL values from Table 8.
Can both flip-flops share the same clock signal without skew-induced metastability?
Yes - output-to-output skew is guaranteed ≤1.0 ns (tOSLH/tOSHL) under all conditions. This ensures deterministic, correlated edge alignment between Q1/Q2 outputs, eliminating race conditions in dual-channel synchronous logic.
74LVQ74TTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74LVQ
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Set(Preset) and Reset
- Type:
- D-Type
- Output Type:
- Complementary
- Number of Elements:
- 2
- Number of Bits per Element:
- 1
- Clock Frequency:
- 250 MHz
- Max Propagation Delay @ V, Max CL:
- 9ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 2V ~ 3.6V
- Current - Quiescent (Iq):
- 2 µA
- Input Capacitance:
- 4 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
74LVQ74TTR FAQ
1.How can I place an order for 74LVQ74TTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVQ74TTR 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 74LVQ74TTR reliable?
The price and inventory of 74LVQ74TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVQ74TTR is usually 5 days.
3.What payment methods are accepted for 74LVQ74TTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVQ74TTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVQ74TTR?
74LVQ74TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVQ74TTR 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 74LVQ74TTR?
For technical support, including 74LVQ74TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVQ74TTR requirements.
6.How does Aetrix verify that 74LVQ74TTR is sourced from the original manufacturer or authorized distributors?
All 74LVQ74TTR 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 74LVQ74TTR meets industry standards.
7.What is the process for return or replacement of 74LVQ74TTR?
All 74LVQ74TTR units undergo pre-shipment inspection (PSI). If there is an issue with 74LVQ74TTR, 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 74LVQ74TTR part is unused and in its original packaging.
Return procedure for 74LVQ74TTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVQ74TTR Tags
-
SN74HC74DR
Texas Instruments
-
SN74HC74PWR
Texas Instruments
-
74LVC1G74GT,115
Nexperia USA Inc.
-
SN74LVC2G74DCUR
Texas Instruments
-
CD4013BM96
Texas Instruments
-
SN74HCT273PWR
Texas Instruments
-
SN74LVC1G74DCUR
Texas Instruments
-
SN74HC574DWR
Texas Instruments
-
74LVC1G74DC,125
Nexperia USA Inc.
-
SN74HC273DWR
Texas Instruments
-
SN74HCT574DWR
Texas Instruments
-
SN74LVC1G74DCTR
Texas Instruments
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
