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Texas Instruments SN74ALVCH374PW
- Part No.:
- SN74ALVCH374PW
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ALVCH374PW.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:890
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Product details
Overview
SN74ALVCH374PW from Texas Instruments is an octal positive-edge-triggered D-type flip-flop with 3-state outputs, designed for 1.65 V to 3.6 V operation. It features ±24-mA output drive at 3.3 V, 3.6 ns max propagation delay, bus-hold on data inputs, and operates across –40°C to 85°C. It serves as a buffer register or bidirectional bus driver in low-voltage digital systems.
For engineers reviewing the SN74ALVCH374PW datasheet, SN74ALVCH374PW pinout, SN74ALVCH374PW application, or SN74ALVCH374PW equivalent, key selection criteria include its TSSOP-20 package, 3-state output control via OE, edge-triggered latch behavior, and compatibility with mixed-voltage I/O interfaces in compact PCB layouts.
Technical Context
This device implements eight independent D-type latches synchronized to the rising edge of CLK, with each Q output reflecting the corresponding D input state at clock transition. Internal bus-hold circuitry eliminates external pullup/pulldown resistors on all eight data inputs.
The buffered OE input controls all eight outputs simultaneously, placing them in high-impedance (Z) state without affecting internal latch operation - enabling concurrent data retention or update while outputs are disabled. Output drive strength scales with VCC, delivering ±24 mA at 3.0 V and maintaining logic-level compatibility across 1.65–3.6 V supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65 V to 3.6 V - supports mixed-voltage system interfacing and low-power operation |
| Max Propagation Delay (tpd) | 3.6 ns at 3.3 V - enables >150 MHz clock operation in high-speed data paths |
| Output Drive Strength | ±24 mA at 3.0 V - drives heavy capacitive loads or multiple CMOS inputs without buffers |
| Bus-Hold Current | ±25 µA to ±75 µA depending on VCC - maintains valid logic state on floating D inputs, removing need for external resistors |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and communications equipment |
| Input/Output Capacitance | Ci = 5 pF (control), Ci = 6 pF (data), Co = 7.5 pF - minimizes signal distortion and timing skew in dense routing |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - meets robustness requirements for handling and board-level reliability |
Pinout & Package
TSSOP-20 package (PW), 6.6 mm × 4.4 mm footprint, 1.2 mm max height, 0.65 mm lead pitch, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE (Output Enable) | Active-low control for all eight 3-state outputs; high-impedance when high, normal logic levels when low |
| 2–9 | 1Q–8Q (Outputs) | Octal registered outputs; reflect D-input states sampled on CLK↑; tri-stated when OE = high |
| 10 | GND | Ground reference for all internal circuitry and I/O |
| 11 | VCC | Primary power supply (1.65–3.6 V); powers logic core and output drivers |
| 12–19 | 1D–8D (Data Inputs) | Eight asynchronous data inputs with integrated bus-hold; retain last valid state when un-driven |
| 20 | CLK | Global positive-edge clock input; triggers simultaneous capture of all eight D inputs into respective Q outputs |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | 1.65 V to 3.6 V operation enables direct interface with 1.8 V, 2.5 V, and 3.3 V logic domains |
| High-Speed Performance | 3.6 ns tpd at 3.3 V supports >150 MHz clock rates in synchronous data acquisition and buffering |
| Integrated Bus-Hold | Eliminates external pullup/pulldown resistors on all eight D inputs, reducing BOM count and PCB area |
| Robust 3-State Control | OE input remains functional during power-up/down; tying OE to VCC via pullup ensures safe high-Z state at startup |
| Latch-Up Immunity | Exceeds 100 mA per JESD 78 Class II - prevents destructive latch-up under transient overvoltage conditions |
Applications
| Industrial PLC I/O Module | Low-Power FPGA Interface Buffer |
|---|---|
Use Scenario: Isolating and latching sensor input data before transmission to a microcontroller over a shared bus. IC Role / Device Role / Timing Role: Acts as an octal input register synchronized to system clock; holds stable values during bus arbitration cycles. Use Value: Bus-hold eliminates need for external biasing on unused sensor channels; 3.6 ns tpd ensures minimal latency in real-time response loops. |
Use Scenario: Providing level-shifted, registered I/O between a 1.8 V FPGA bank and 3.3 V peripheral subsystem. IC Role / Device Role / Timing Role: Serves as voltage-tolerant bidirectional bus interface with edge-triggered sampling and high-drive capability. Use Value: ±24 mA drive at 3.0 V allows direct connection to legacy peripherals; wide VCC range avoids dedicated level translators. |
| Compact Embedded Data Acquisition | Memory-Mapped Peripheral Register |
Use Scenario: Capturing parallel ADC output bits in battery-powered portable instrumentation. IC Role / Device Role / Timing Role: Functions as a low-quiescent-current input latch, capturing conversion results on CLK↑ with minimal power overhead. Use Value: 10 µA ICC at 3.6 V reduces standby current; TSSOP-20 footprint saves space versus SOIC alternatives. |
Use Scenario: Implementing hardware-configurable control registers accessible via microcontroller address/data bus. IC Role / Device Role / Timing Role: Provides eight programmable output bits with synchronous update and tristate capability for dynamic bus sharing. Use Value: OE-controlled high-Z state allows seamless integration into multiplexed memory-mapped I/O architectures without contention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC374APW | Lower drive (±24 mA only at 3.3 V), no bus-hold, identical TSSOP-20 package | Requires external pullups on unused D inputs; suitable where board space permits discrete biasing | Select when cost sensitivity outweighs bus-hold convenience and layout simplification |
| 74AVC374PW | Higher speed (2.4 ns tpd at 3.3 V), same VCC range, no bus-hold, identical pinout | Demands stricter signal integrity controls due to faster edges; lacks input state retention on float | Choose for maximum throughput in noise-controlled environments where bus-hold is unnecessary |
Compared with SN74ALVCH374PW, SN74LVC374APW removes bus-hold to reduce complexity and cost but increases BOM and layout effort, while 74AVC374PW trades input robustness for higher clock rates - making SN74ALVCH374PW optimal for industrial designs prioritizing reliability, ease of use, and mixed-voltage interoperability.
Availability
SN74ALVCH374PW is available at Aetrix Electronics and suitable for industrial PLC I/O modules, low-power FPGA interface buffers, and compact embedded data acquisition systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74ALVCH374PW 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of experience in high-reliability logic and interface solutions.
The SN74ALVCH374PW belongs to TI's ALVC/ALVCH advanced low-voltage CMOS logic family, engineered for high-speed, low-power, mixed-voltage digital interfacing in industrial, communications, and computing applications.
FAQ
What is the recommended power-up sequence for SN74ALVCH374PW?
TI recommends tying OE to VCC through a pullup resistor during power-up to ensure outputs remain in high-impedance state until system initialization completes. The minimum resistor value depends on the driver's current-sinking capability; typical values range from 4.7 kΩ to 10 kΩ. This prevents bus contention and ensures deterministic behavior before firmware configures the device. SN74ALVCH374PW does not require specific VCC ramp rate or sequencing with other rails.
Does SN74ALVCH374PW support hot insertion?
SN74ALVCH374PW is not explicitly rated for hot insertion per JEDEC standards. Its absolute maximum ratings allow VI and VO up to –0.5 V and VCC + 0.5 V, and it features robust ESD protection (2000-V HBM), but the absence of powered-off protection circuitry means back-driving outputs while VCC is unpowered may violate absolute max limits. For hot-swap applications, external protection or sequencing circuitry is required. SN74ALVCH374PW should be powered before applying signals.
How does bus-hold functionality behave on SN74ALVCH374PW during power-down?
Bus-hold circuitry in SN74ALVCH374PW remains active as long as VCC is above ~0.8 V and ceases operation below that threshold. During controlled power-down, it retains the last valid logic state on each D input until VCC drops below the hold threshold, preventing metastability or undefined sampling at clock edges near shutdown. However, once VCC falls further, inputs float freely. SN74ALVCH374PW does not guarantee bus-hold behavior below 0.8 V.
Can SN74ALVCH374PW drive a 50-pF load at 150 MHz?
Yes - SN74ALVCH374PW specifies fmax = 150 MHz at VCC = 3.3 V with CL = 50 pF (per switching characteristics table). Its 3.6 ns tpd and ±24 mA drive strength ensure clean edge transitions into 50-pF loads at that frequency. Layout best practices - short traces, proper grounding, and decoupling near VCC/GND pins - are essential to maintain signal integrity. SN74ALVCH374PW performance is validated under these exact test conditions.
Is SN74ALVCH374PW pin-compatible with SN74ALVCH374PWR?
Yes - SN74ALVCH374PW and SN74ALVCH374PWR share identical TSSOP-20 (PW) package, pinout, electrical specifications, and thermal characteristics. The only difference is packaging format: SN74ALVCH374PW ships in tubes (70 units), while SN74ALVCH374PWR uses tape-and-reel (2000 units). Both have identical top-side marking "VB374" and MSL Level-1 rating. SN74ALVCH374PW and SN74ALVCH374PWR are functionally and mechanically interchangeable.
SN74ALVCH374PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVCH
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 3.6ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Current - Quiescent (Iq):
- 10 µA
- Input Capacitance:
- 5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74ALVCH374PW FAQ
1.How can I place an order for SN74ALVCH374PW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVCH374PW 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 SN74ALVCH374PW reliable?
The price and inventory of SN74ALVCH374PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVCH374PW is usually 5 days.
3.What payment methods are accepted for SN74ALVCH374PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVCH374PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALVCH374PW?
SN74ALVCH374PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVCH374PW 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 SN74ALVCH374PW?
For technical support, including SN74ALVCH374PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVCH374PW requirements.
6.How does Aetrix verify that SN74ALVCH374PW is sourced from the original manufacturer or authorized distributors?
All SN74ALVCH374PW 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 SN74ALVCH374PW meets industry standards.
7.What is the process for return or replacement of SN74ALVCH374PW?
All SN74ALVCH374PW units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCH374PW, 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 SN74ALVCH374PW part is unused and in its original packaging.
Return procedure for SN74ALVCH374PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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