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STMicroelectronics 74LVX74TTR
- Part No.:
- 74LVX74TTR
- Manufacturer:
- STMicroelectronics
- Category:
- Flip Flops
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LVX74TTR.pdf
- Description:
- IC FF D-TYPE DUAL 1BIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,549
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Product details
Overview
74LVX74TTR from STMicroelectronics is a dual D-type flip-flop with asynchronous preset and clear, 5V-tolerant inputs, operating from 2V to 3.6V supply. It delivers tPLH/tPHL ≤11.5 ns (typ.), fMAX = 145 MHz (typ. at VCC = 3.3V), and ICC ≤2 µA (max. at TA = 25°C). Designed for low-noise, battery-powered 3.3V logic interfacing between 5V and 3V systems.
For engineers reviewing the 74LVX74TTR datasheet, 74LVX74TTR pinout, 74LVX74TTR application, or 74LVX74TTR equivalent, key selection criteria include 5V-tolerant input voltage range (0–5.5V), symmetrical output drive (|IOH| = IOL = 4 mA min), balanced propagation delays, power-down input protection, and TSSOP-14 package compatibility with 74-series logic footprints.
Technical Context
This device implements two independent edge-triggered D-type flip-flops with active-low asynchronous set (PR) and reset (CLR) inputs. Each stage operates on the rising edge of its dedicated clock (1CK/2CK), with data transfer from D to Q determined solely by the clock transition - independent of PR/CLR timing except during assertion.
Input protection enables safe operation with 0–7V input voltages regardless of VCC, supporting hot-swap and mixed-voltage bus interfacing. The sub-micron C2MOS process ensures latch-up immunity and 2 kV HBM ESD tolerance on all pins, while dynamic noise control yields VOLP = 0.3 V (typ.) at VCC = 3.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating Range | 2.0 V to 3.6 V - supports single-supply 3.3V systems with 1.2V data retention margin |
| fMAX (Typ.) | 145 MHz at VCC = 3.3V - enables high-speed synchronous logic in portable and interface applications |
| tPLH / tPHL (Max) | 11.5 ns at VCC = 3.3V, CL = 15 pF - ensures tight timing alignment between Q and Q̅ outputs |
| 5V-Tolerant Inputs | VI = 0–5.5 V - allows direct connection to legacy 5V TTL/CMOS without level shifters |
| ICC (Max) | 2 µA at TA = 25°C - enables ultra-low static power in always-on or battery-backed circuits |
| IOH / IOL (Min) | ±4 mA - provides robust drive strength for fan-out to multiple 3.3V CMOS loads |
| VOLP (Typ.) | 0.3 V at VCC = 3.3V - minimizes switching noise coupling into adjacent signal lines |
Pinout & Package
TSSOP-14 package: 4.9 mm × 6.4 mm body, 0.65 mm pitch, 14-pin surface-mount with exposed pad not present. RoHS-compliant, moisture sensitivity level MSL3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 | 1CLR, 2CLR | Active-low asynchronous reset - forces Q = L, Q̅ = H independent of clock or D state |
| 2, 12 | 1D, 2D | Data input - sampled on rising clock edge; latched value appears at Q after tPLH/tPHL |
| 3, 11 | 1CK, 2CK | Positive-edge-triggered clock - initiates synchronous data capture; requires ≥6 ns minimum pulse width |
| 4, 10 | 1PR, 2PR | Active-low asynchronous preset - forces Q = H, Q̅ = L independent of clock or D state |
| 5, 9 | 1Q, 2Q | True output - reflects stored D value after clock edge; driven to valid logic levels under ±4 mA load |
| 6, 8 | 1Q̅, 2Q̅ | Inverted output - complementary to Q; matched impedance and delay ensure clean differential signaling |
| 7 | GND | Ground reference - must be low-impedance return path for all internal switching currents |
| 14 | VCC | Positive supply - powers both flip-flop sections; decoupling capacitor required within 1 cm |
Key Features
| Feature | Design Value |
|---|---|
| 5V-tolerant inputs with power-down protection | Accepts 0–7V inputs regardless of VCC state - eliminates external clamping diodes in mixed-voltage designs |
| Symmetrical output drive capability | |IOH| = IOL = 4 mA (min) - ensures consistent rise/fall times and reduced skew across logic families |
| Balanced propagation delays (tPLH ≈ tPHL) | ≤1.5 ns skew between Q and Q̅ - critical for glitch-free clock distribution and sampling windows |
| Ultra-low quiescent current | ICC ≤ 2 µA (max) at 25°C - extends battery life in standby modes without sacrificing speed |
| Enhanced latch-up immunity | Qualified per JEDEC JESD78 - prevents destructive parasitic SCR activation during overvoltage transients |
Applications
| Industrial PLC I/O Modules | Portable Medical Sensor Interfaces |
|---|---|
|
Use Scenario: Synchronizing opto-isolated digital inputs from field sensors into a 3.3V microcontroller bus. IC Role / Device Role / Timing Role: Dual-edge-aligned register buffering 5V sensor signals before ADC sampling or interrupt generation. Use Value: 5V-tolerant inputs eliminate level-shifter ICs; low ICC reduces thermal load in sealed enclosures. |
Use Scenario: Capturing real-time biopotential waveform edges (ECG/EMG) in battery-powered diagnostic wearables. IC Role / Device Role / Timing Role: Edge-triggered data capture staging for low-latency digital filtering and wireless transmission. Use Value: 145 MHz fMAX supports oversampling at >1 MSPS; VOLP = 0.3 V minimizes noise coupling into analog front-end. |
| Automotive Body Control Units | IoT Edge Node Status Latching |
|
Use Scenario: Debouncing and synchronizing door-lock switch signals before CAN message framing in 12V vehicle systems. IC Role / Device Role / Timing Role: Asynchronous preset/clear enables hardware-initiated fault recovery without MCU intervention. Use Value: -55°C to +125°C operating range meets AEC-Q100 Grade 2 requirements; latch-up immunity withstands load-dump transients. |
Use Scenario: Storing last-known network status (Wi-Fi/BLE link up/down) during deep-sleep cycles in smart home hubs. IC Role / Device Role / Timing Role: Nonvolatile state retention via 1.2V data hold capability during VCC brownout events. Use Value: 2 µA max ICC enables multi-year coin-cell operation; TSSOP-14 footprint simplifies layout in space-constrained modules. |
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 | Lower VCC min (1.65V), higher fMAX (200 MHz), but only 3.6V max input tolerance | Requires external clamping for 5V inputs; better suited for pure 3.3V systems needing higher speed | Select when system uses only 3.3V peripherals and demands >145 MHz operation |
| 74AUP2G74DC | Ultra-low ICC (0.9 µA typ.), smaller X2SON-8 package, but single-channel only and no 5V tolerance | Lacks dual-channel integration and mixed-voltage support; requires two units for same functionality | Select for space-constrained, single-bit latching where 5V interfacing is unnecessary |
Compared with SN74LVC74APWR and 74AUP2G74DC, the 74LVX74TTR uniquely balances 5V-tolerant interfacing, dual-channel integration, and sub-µA static power - making it optimal for cost-sensitive, mixed-voltage embedded control nodes requiring guaranteed timing margins.
Availability
74LVX74TTR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, portable medical sensor interfaces, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVX74TTR 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 microcontrollers, power management, analog, and discrete devices for industrial, automotive, and consumer markets.
The 74LVX series targets low-voltage, low-power 3.3V logic interoperability - specifically engineered to bridge legacy 5V systems with modern energy-efficient digital architectures while maintaining pin and functional compatibility with standard 74-series logic.
FAQ
Can 74LVX74TTR operate reliably at 1.8V supply?
No. The recommended operating VCC range is strictly 2.0 V to 3.6 V per datasheet Section 3. Absolute minimum VCC is 2.0 V; operation below this violates guaranteed AC/DC specifications including tPLH, VIH/VIL thresholds, and output drive strength. At 1.8V, timing margins collapse and DC parameters fall outside specification.
Is the TSSOP-14 package of 74LVX74TTR lead-free and RoHS-compliant?
Yes. STMicroelectronics certifies the 74LVX74TTR in TSSOP-14 as fully RoHS-compliant and lead-free per EU Directive 2011/65/EU, with homogeneous material analysis confirming Pb content < 1000 ppm. The device carries the "E3" marking indicating matte tin termination and qualifies for SnPb reflow profiles.
What is the maximum capacitive load supported at 145 MHz operation?
At fMAX = 145 MHz (typ., VCC = 3.3V), the device is characterized with CL = 15 pF per output. Driving >15 pF increases propagation delay and may violate setup/hold timing at full speed; for 50 pF loads, fMAX drops to 85 MHz (max) per AC Electrical Characteristics Table on page 5 of the datasheet.
How does power-down protection function on inputs when VCC = 0V?
Each input features integrated diode clamping to VCC and GND. When VCC = 0V, the upper clamp diode conducts any positive input voltage >0.3V into the (unpowered) VCC rail, while the lower diode shunts negative excursions to GND. This allows safe 0–5.5V input application even with VCC unpowered - preventing latch-up or damage.
74LVX74TTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74LVX
- 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:
- 85 MHz
- Max Propagation Delay @ V, Max CL:
- 13.2ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 4mA, 4mA
- 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
74LVX74TTR FAQ
1.How can I place an order for 74LVX74TTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVX74TTR 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 74LVX74TTR reliable?
The price and inventory of 74LVX74TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVX74TTR is usually 5 days.
3.What payment methods are accepted for 74LVX74TTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVX74TTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVX74TTR?
74LVX74TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVX74TTR 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 74LVX74TTR?
For technical support, including 74LVX74TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVX74TTR requirements.
6.How does Aetrix verify that 74LVX74TTR is sourced from the original manufacturer or authorized distributors?
All 74LVX74TTR 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 74LVX74TTR meets industry standards.
7.What is the process for return or replacement of 74LVX74TTR?
All 74LVX74TTR units undergo pre-shipment inspection (PSI). If there is an issue with 74LVX74TTR, 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 74LVX74TTR part is unused and in its original packaging.
Return procedure for 74LVX74TTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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