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Diodes Incorporated PI74STX1G79CX
- Part No.:
- PI74STX1G79CX
- Manufacturer:
- Diodes Incorporated
- Category:
- Flip Flops
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
PI74STX1G79CX.pdf
- Description:
- IC SINGLE D-TYPE FLIPFLOP SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,047
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Product details
Overview
PI74STX1G79CX from Diodes Incorporated is a single D-type flip-flop with complementary outputs, designed for high-speed data latching and clocked storage in digital logic systems. It operates at 1.65 V to 5.5 V supply, supports 200 MHz maximum clock frequency, features 2.5 ns typical propagation delay (tPLH/tPHL), and is housed in a compact SC-70-5 package. It is used in serial-to-parallel data conversion and clock domain synchronization circuits.
For engineers reviewing the PI74STX1G79CX datasheet, PI74STX1G79CX pinout, PI74STX1G79CX application, or PI74STX1G79CX equivalent, key selection criteria include supply voltage range, propagation delay, output drive strength, input transition time tolerance, and SC-70 footprint compatibility with space-constrained PCB layouts.
Technical Context
This device implements a positive-edge-triggered D flip-flop with true and inverted Q outputs. It uses CMOS technology for low static power consumption and rail-to-rail output swing, with guaranteed operation across industrial temperature range (–40°C to +85°C) and ESD protection exceeding 2 kV HBM.
The input stage accepts fast edge rates (tr/tf ≤ 3 ns), and the output stage delivers 24 mA sink/source capability at VCC = 3.3 V. Setup and hold times are specified at 1.5 ns and 1.0 ns respectively under standard load conditions (CL = 50 pF).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65 V to 5.5 V - Enables direct interface with 1.8 V, 2.5 V, 3.3 V, and 5 V logic families without level shifting. |
| Max Clock Frequency | 200 MHz - Supports high-speed serial data capture and timing-critical state machine control. |
| tPLH / tPHL (typ) | 2.5 ns - Ensures minimal clock-to-output delay for tight timing budgets in synchronous designs. |
| IOH / IOL (VCC = 3.3 V) | –24 mA / +24 mA - Drives standard CMOS loads and small capacitive buses without external buffers. |
| Input Transition Time | tr/tf ≤ 3 ns - Compatible with fast-switching drivers and low-jitter clock sources. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded and communication equipment deployment. |
Pinout & Package
PI74STX1G79CX is packaged in a 5-pin SC-70 (SOT-353) surface-mount package, measuring 2.10 mm × 1.25 mm × 0.95 mm with 0.65 mm pitch and JEDEC MO-203AA compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - DIN | Data Input | Asynchronous D input; sampled on rising edge of CLK; must meet setup/hold timing relative to clock. |
| 2 - GND | Ground Reference | Primary return path for all internal logic and output currents; requires low-impedance PCB connection. |
| 3 - VCC | Power Supply | Single-supply rail for core logic and output drivers; bypass capacitor (0.1 µF) recommended near pin. |
| 4 - QOUT | True Output | Complementary to /Q; drives downstream logic with full rail-swing CMOS levels. |
| 5 - CLK | Clock Input | Positive-edge-sensitive control signal; internally buffered and Schmitt-triggered for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | 1.65 V to 5.5 V enables interoperability across mixed-voltage system domains. |
| High-Speed Operation | 200 MHz max clock rate supports real-time data sampling in USB, UART, and sensor interface paths. |
| Low Propagation Delay | 2.5 ns typical tPLH/tPHL reduces critical path latency in pipeline and register-transfer logic. |
| SC-70 Footprint | 2.1 mm × 1.25 mm package saves board area in portable and IoT endpoint designs. |
Applications
| USB 2.0 Transceiver Interface | Industrial Sensor Data Acquisition |
|---|---|
Use Scenario: Latching incoming serial data bits from a USB PHY before parallel processing by an MCU. IC Role / Device Role / Timing Role: Edge-triggered data register synchronizing asynchronous USB packet bits to the MCU's internal clock domain. Use Value: Eliminates metastability risk during clock domain crossing while maintaining <1 ns timing margin at 48 MHz symbol rate. | Use Scenario: Capturing analog-to-digital converter (ADC) output words in programmable logic controllers. IC Role / Device Role / Timing Role: Synchronizing parallel ADC data bus to a deterministic system clock for deterministic sampling intervals. Use Value: Guarantees setup/hold compliance for 12-bit ADCs operating up to 1 MSPS with 3.3 V I/O. |
| Automotive LIN Bus Node | Smart Meter Communication Module |
Use Scenario: Storing command bits received over LIN transceiver before decoding and actuator control. IC Role / Device Role / Timing Role: Glitch-free data latch enabling reliable command parsing under noisy automotive electrical environments. Use Value: Maintains >2 kV HBM ESD robustness and –40°C to +85°C operation required for under-hood LIN nodes. | Use Scenario: Buffering RS-485 frame data in AMI (Advanced Metering Infrastructure) concentrator modules. IC Role / Device Role / Timing Role: Isolating high-speed serial receive data from microcontroller timing jitter during protocol framing. Use Value: Provides 24 mA drive strength to reliably load RS-485 receiver inputs with long trace capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G79DBVR | Same SC-70-5 package; 1.65–5.5 V supply; slightly higher tPD (2.9 ns typ); identical pinout. | Validated in TI's automotive AEC-Q100 Grade 1 portfolio; preferred for automotive qualification programs. | Select when AEC-Q100 compliance is mandatory; otherwise, PI74STX1G79CX offers lower propagation delay. |
| 74AUP1G79GW,125 | Lower VCC range (0.8–3.6 V); 3.5 ns tPD (typ); same pinout; optimized for ultra-low power (0.9 µA ICC). | Suitable for battery-powered metering and wearables where sub-1 µA quiescent current is critical. | Choose for energy-constrained applications below 3.6 V; not suitable for 5 V or mixed-voltage systems. |
Compared with SN74LVC1G79DBVR and 74AUP1G79GW,125, PI74STX1G79CX delivers the lowest propagation delay (2.5 ns) within the SC-70-5 D-flip-flop category while supporting full 5 V operation-making it optimal for high-speed, mixed-voltage industrial interfaces requiring timing margin.
Availability
PI74STX1G79CX is available at Aetrix Electronics and suitable for USB interface design, industrial sensor acquisition, automotive LIN node implementation, and smart meter communication modules requiring stable component supply and consistent parametric performance.
Supply support for PI74STX1G79CX 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-performance, high-reliability components for industrial, computing, consumer, and automotive markets.
PI74STX1G79CX belongs to the Precision Logic family, engineered for low-latency, rail-to-rail digital interfacing in space- and power-constrained applications demanding precise timing control.
FAQ
What is the minimum input pulse width (tW) required for reliable CLK operation?
The minimum clock pulse width is 2.5 ns at VCC = 3.3 V, measured at 50% of VCC. This ensures proper internal latch sampling and avoids metastability. Pulse widths below this value may cause unpredictable output states or failure to toggle on valid edges.
Does PI74STX1G79CX support hot insertion or live insertion into powered systems?
No. The device lacks Ioff (power-off protection) and does not guarantee isolation of inputs/outputs when VCC = 0 V. Applying signals to DIN, CLK, or QOUT while unpowered risks latch-up or damage due to parasitic conduction paths.
Can QOUT and /Q be used simultaneously to drive differential signaling lines?
No. PI74STX1G79CX provides only QOUT (true output); /Q is not exposed on a dedicated pin. The complementary output is internal only-this part is not a dual-output flip-flop. Use PI74STX1G74 for true/complement outputs.
Is there an exposed thermal pad on the SC-70-5 package?
No. The SC-70-5 package (JEDEC MO-203AA) used for PI74STX1G79CX has no thermal pad. Thermal dissipation relies solely on copper traces connected to pins 2 (GND) and 3 (VCC); no solder paste or thermal via requirements apply.
PI74STX1G79CX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74STX
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 1
- Clock Frequency:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 32mA
- Voltage - Supply:
- 1.65V ~ 5.5V
- Current - Quiescent (Iq):
- 2 µA
- Input Capacitance:
- 3 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
PI74STX1G79CX FAQ
1.How can I place an order for PI74STX1G79CX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI74STX1G79CX 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 PI74STX1G79CX reliable?
The price and inventory of PI74STX1G79CX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74STX1G79CX is usually 5 days.
3.What payment methods are accepted for PI74STX1G79CX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI74STX1G79CX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI74STX1G79CX?
PI74STX1G79CX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI74STX1G79CX 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 PI74STX1G79CX?
For technical support, including PI74STX1G79CX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74STX1G79CX requirements.
6.How does Aetrix verify that PI74STX1G79CX is sourced from the original manufacturer or authorized distributors?
All PI74STX1G79CX 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 PI74STX1G79CX meets industry standards.
7.What is the process for return or replacement of PI74STX1G79CX?
All PI74STX1G79CX units undergo pre-shipment inspection (PSI). If there is an issue with PI74STX1G79CX, 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 PI74STX1G79CX part is unused and in its original packaging.
Return procedure for PI74STX1G79CX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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