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STMicroelectronics 74LVQ174TTR
- Part No.:
- 74LVQ174TTR
- Manufacturer:
- STMicroelectronics
- Category:
- Flip Flops
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LVQ174TTR.pdf
- Description:
- IC FF D-TYPE SNGL 6BIT 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,140
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Product details
Overview
74LVQ174TTR from STMicroelectronics is a low-voltage CMOS hex D-type flip-flop with asynchronous clear, non-inverting outputs, operating from 2V to 3.6V supply. It features 150 MHz max clock frequency (typ.), 12 mA output drive at 3.0 V, and 4 µA quiescent current (max) at 25°C - optimized for low-noise, low-power 3.3V digital logic systems such as PCI bus interfaces and data latching in embedded controllers.
For engineers reviewing the 74LVQ174TTR datasheet, 74LVQ174TTR pinout, 74LVQ174TTR application, or 74LVQ174TTR equivalent, key selection criteria include propagation delay symmetry (tPLH ≅ tPHL), 75Ω transmission line driving capability, ESD immunity (2 kV), and pin/function compatibility with standard 74-series 174 devices.
Technical Context
This device implements six independent edge-triggered D-type flip-flops sharing a common positive-edge clock and asynchronous active-low clear. Each stage transfers D-input data to Q-output on CLK's rising edge; CLR forces all Q outputs low regardless of clock or data state.
Designed using sub-micron C2MOS technology, it delivers symmetrical output impedance (|IOH| = IOL ≥ 12 mA at VCC = 3.0 V), low dynamic noise (VOLP = 0.3 V typ. at VCC = 3.3 V), and guaranteed PCI bus levels at 24 mA sink/source - enabling robust signal integrity in high-speed digital interconnects.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating Range | 2.0 V to 3.6 V - supports mixed-voltage 3.3V system designs with 1.2V data retention |
| fMAX (Typ.) | 150 MHz at VCC = 3.3 V - enables high-throughput data capture in timing-critical control paths |
| tPLH / tPHL (Typ.) | 5.5 ns / 8.0 ns at VCC = 3.3 V - ensures balanced propagation delays for deterministic setup/hold timing |
| IOL / IOH (Min.) | 12 mA at VCC = 3.0 V - drives 75Ω transmission lines directly without external termination |
| ICC (Max.) | 4 µA at TA = 25°C - minimizes standby power in battery-backed or energy-sensitive applications |
| VOLP (Typ.) | 0.3 V at CL = 50 pF, VCC = 3.3 V - reduces ground bounce and crosstalk in dense PCB layouts |
| ESD Immunity | 2 kV HBM - protects against handling-induced static discharge during assembly and test |
Pinout & Package
TSSOP-16 package (JEDEC MO-153, 4.4 mm × 5.0 mm body, 0.65 mm pitch) with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CLR) | Asynchronous master reset | Active-low global clear: forces all Q outputs low independently of clock or data |
| 2,5,7,10,12,15 (Q0–Q5) | Flip-flop outputs | Non-inverting registered outputs; each mirrors corresponding D input after CLK rising edge |
| 3,4,6,11,13,14 (D0–D5) | Data inputs | Independent parallel data inputs synchronized to CLK edge; no internal latching prior to clock |
| 9 (CLK) | Clock input | Positive-edge triggered; all six flip-flops sample D inputs simultaneously on rising transition |
| 8 (GND) | Ground reference | Primary return path for all I/O and supply currents; requires low-impedance PCB connection |
| 16 (VCC) | Supply voltage | Single 2.0–3.6 V rail powers all logic and output stages; decoupling near pin required |
Key Features
| Feature | Design Value |
|---|---|
| Pin- and function-compatible with 74LS174/74HC174 | Direct drop-in replacement in legacy 3.3V or mixed-voltage board upgrades without layout change |
| 75Ω transmission line driving | Eliminates need for external series termination resistors in point-to-point or stubbed bus topologies |
| Balanced tPLH/tPHL propagation | Reduces skew-induced timing uncertainty in synchronous data capture across multiple channels |
| Low dynamic noise (VOLP = 0.3 V) | Minimizes simultaneous switching output (SSO) noise affecting adjacent analog or RF circuitry |
| Enhanced latch-up immunity | Withstands transient overvoltage events per JEDEC JESD78 without destructive latch-up |
Applications
| PCI Bus Interface | Digital Control Register |
|---|---|
Use Scenario: Latching address/data strobes and command signals between 3.3V PCI controller and peripheral logic. IC Role / Device Role / Timing Role: Hex D-flip-flop providing synchronized, glitch-free register staging for PCI transaction handshaking. Use Value: 24 mA drive capability meets PCI specification for 3.3V signaling; 150 MHz fMAX supports full 33 MHz bus operation. | Use Scenario: Holding configuration bits for FPGA I/O banks, microcontroller peripherals, or programmable logic arrays. IC Role / Device Role / Timing Role: Non-volatile state storage element with asynchronous reset for safe power-on initialization. Use Value: 4 µA ICC enables ultra-low standby current in always-on control registers; 2V min VCC allows operation with brown-out tolerant supplies. |
| Industrial Data Acquisition | Test Equipment Signal Conditioning |
Use Scenario: Capturing parallel sensor readings (e.g., ADC outputs) into synchronized sample buffers before serial transmission. IC Role / Device Role / Timing Role: Parallel-to-serial interface synchronizer aligning multi-channel analog digitization to system clock domain. Use Value: Symmetrical tPLH/tPHL ensures consistent sampling window alignment across all six channels; 2 kV ESD protects against field-induced transients. | Use Scenario: Level-shifting and retiming TTL/CMOS signals in automated test equipment (ATE) pattern generators. IC Role / Device Role / Timing Role: Input signal conditioner that cleans jitter and enforces precise setup/hold margins for downstream comparators or DACs. Use Value: 0.3 V VOLP suppresses false triggering in high-sensitivity measurement circuits; 12 mA drive sustains signal integrity over 15 cm PCB traces. |
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 |
|---|---|---|---|
| SN74LVC174APWR | Higher ICC (10 µA max), lower fMAX (110 MHz typ.), same TSSOP-16 footprint | Lacks 75Ω line driving guarantee; requires external termination for clean edge integrity | Preferred where cost sensitivity outweighs transmission-line optimization needs |
| 74AUP1G74GW,652 | Single DFF (not hex), 1.8–3.6 V range, 3.5 µA ICC, smaller SC-70-6 package | Requires six discrete units for equivalent channel count; increases routing complexity and board area | Suitable only for space-constrained, low-channel-count designs with distributed clocking |
Compared with SN74LVC174APWR and 74AUP1G74GW,652, the 74LVQ174TTR uniquely combines hex integration, 75Ω line driving, and sub-µA quiescent current - making it optimal for compact, noise-sensitive 3.3V control and interface applications requiring minimal external components.
Availability
74LVQ174TTR is available at Aetrix Electronics and suitable for PCI bus interfaces, industrial data acquisition systems, and digital control registers requiring stable component supply and long-term production support.
Supply support for 74LVQ174TTR 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 broad manufacturing and R&D infrastructure.
The 74LVQ series targets low-voltage, low-noise 3.3V logic applications - designed specifically for noise-sensitive digital systems requiring high-speed operation, ESD robustness, and compatibility with legacy TTL and CMOS families.
FAQ
Is the 74LVQ174TTR compatible with 5V-tolerant inputs?
No. The 74LVQ174TTR has absolute maximum input voltage of VCC + 0.5 V. With VCC ≤ 3.6 V, VI must stay within –0.5 V to 4.1 V. Direct connection to 5V logic violates this rating and risks permanent damage. Level-shifting circuitry is required for interfacing with 5V systems.
What is the minimum pulse width required on the CLR input?
At VCC = 3.3 V, the minimum low pulse width on CLR is 3.0 ns (typ.) and 4.0 ns (max) across –55°C to 125°C. This ensures reliable asynchronous reset assertion even under fast-switching conditions in high-frequency control loops.
Does the device support hot insertion or live insertion?
No official hot-insertion qualification is provided. While the 2 kV HBM ESD rating and rail-to-rail input protection improve robustness, the absence of powered-off input protection (Ioff) means unpowered devices may experience back-powering or latch-up when inserted into live backplanes - use only in cold-plug environments.
Can the 74LVQ174TTR drive a 50Ω transmission line?
It is specified for 75Ω line driving (VOLP = 0.3 V typ. at CL = 50 pF). Driving 50Ω loads increases current demand beyond the 12 mA minimum spec, potentially raising VOL and degrading edge fidelity. For 50Ω systems, verify VOL and overshoot empirically or add series termination.
74LVQ174TTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74LVQ
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 8ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 2V ~ 3.6V
- Current - Quiescent (Iq):
- 4 µA
- Input Capacitance:
- 4 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
74LVQ174TTR FAQ
1.How can I place an order for 74LVQ174TTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVQ174TTR 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 74LVQ174TTR reliable?
The price and inventory of 74LVQ174TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVQ174TTR is usually 5 days.
3.What payment methods are accepted for 74LVQ174TTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVQ174TTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVQ174TTR?
74LVQ174TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVQ174TTR 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 74LVQ174TTR?
For technical support, including 74LVQ174TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVQ174TTR requirements.
6.How does Aetrix verify that 74LVQ174TTR is sourced from the original manufacturer or authorized distributors?
All 74LVQ174TTR 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 74LVQ174TTR meets industry standards.
7.What is the process for return or replacement of 74LVQ174TTR?
All 74LVQ174TTR units undergo pre-shipment inspection (PSI). If there is an issue with 74LVQ174TTR, 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 74LVQ174TTR part is unused and in its original packaging.
Return procedure for 74LVQ174TTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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