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Texas Instruments SN74ALVCH374DWRG4
- Part No.:
- SN74ALVCH374DWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74ALVCH374DWRG4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,828
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Product details
Overview
SN74ALVCH374DWRG4 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 circuitry 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 SN74ALVCH374DWRG4 datasheet, SN74ALVCH374DWRG4 pinout, SN74ALVCH374DWRG4 application, or SN74ALVCH374DWRG4 equivalent, key selection criteria include its 20-pin TSSOP package, 3-state output control via OE, edge-triggered latch behavior, and compatibility with mixed-voltage I/O interfaces in industrial and embedded control designs.
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, reducing BOM count and layout complexity.
The buffered OE input controls all eight outputs simultaneously, placing them in high-impedance (Z) state without affecting internal latch operation-enabling data retention or new sampling while outputs are disabled. Output drive strength scales with VCC, delivering ±24 mA at 3.0 V and maintaining logic integrity down to 1.65 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports mixed-voltage system interfacing and battery-powered 1.8 V/2.5 V/3.3 V domains |
| tpd (max) | 3.6 ns at 3.3 V - enables reliable operation in high-speed digital control loops up to 150 MHz clock frequency |
| Output Drive | ±24 mA at 3.0 V - drives standard CMOS loads and short PCB traces without external buffers |
| Bus-Hold | Integrated on all D inputs - prevents floating inputs and eliminates need for 10-kΩ pullup/pulldown resistors |
| tSU / tH | 2.1 ns / 0.5 ns at 3.3 V - tight timing margins allow use with fast microcontroller GPIO or FPGA I/O |
| Ioff Current | ±10 µA at 3.6 V - ensures minimal leakage during power-down or hot-swap conditions |
| ESD Rating | 2000-V HBM - meets industrial IEC 61000-4-2 level for robust board-level ESD immunity |
Pinout & Package
TSSOP-20 (PW) package: 6.95 mm × 4.4 mm × 1.2 mm body, 0.65 mm lead pitch, exposed pad not present, 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 when low |
| 2–9 | 1D–8D | Data inputs for eight D-type latches; each has integrated bus-hold circuitry |
| 10 | GND | Ground reference for all internal logic and output drivers |
| 11 | VCC | Primary power supply (1.65–3.6 V); powers both logic core and output drivers |
| 12–19 | 1Q–8Q | Registered outputs; reflect D-input states sampled on rising CLK edge |
| 20 | CLK | Global clock input; positive-edge sensitive; synchronizes all eight latches |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range | 1.65 V to 3.6 V operation enables direct interface between 1.8 V FPGAs and 3.3 V peripherals |
| Bus-hold inputs | Eliminates external biasing components on all eight D inputs, reducing PCB area and assembly cost |
| High-output drive | ±24 mA per output at 3.0 V supports driving multiple CMOS loads or longer trace runs |
| Low propagation delay | 3.6 ns max tpd at 3.3 V allows use in timing-critical applications such as address latching or pipeline staging |
| 3-state output control | Single OE pin disables all outputs simultaneously without disrupting internal latch state |
Applications
| Industrial PLC I/O Expansion | FPGA Configuration Interface |
|---|---|
|
Use Scenario: Expanding digital I/O capacity in programmable logic controller backplanes with space-constrained modules. IC Role / Device Role / Timing Role: Acts as an octal output latch and input buffer, isolating field-side signals from the main controller bus. Use Value: Bus-hold inputs prevent spurious transitions during hot-swap insertion; 3-state outputs enable shared bus arbitration without contention. |
Use Scenario: Latching configuration data between FPGA configuration memory and I/O banks during power-up sequencing. IC Role / Device Role / Timing Role: Serves as a voltage-translating register stage, capturing parallel configuration bits before FPGA initialization. Use Value: 1.65–3.6 V VCC range matches both 1.8 V configuration memory and 3.3 V I/O standards; low tpd ensures setup time compliance. |
| Automotive Body Control Module | Test Equipment Digital Pattern Generator |
|
Use Scenario: Driving LED indicators, relays, and sensor interface lines in automotive body electronics with strict EMC requirements. IC Role / Device Role / Timing Role: Functions as a buffered output register, decoupling MCU GPIO from noisy actuator loads. Use Value: ±24 mA drive handles typical 10–20 mA LED loads directly; 2000-V HBM rating withstands vehicle-level ESD events. |
Use Scenario: Generating synchronized digital stimulus waveforms for IC functional testing using pattern memory and timing controllers. IC Role / Device Role / Timing Role: Provides precise edge-aligned data capture and stable output hold for test vector delivery. Use Value: 0.5 ns hold time and 2.1 ns setup time support >150 MHz pattern rates; 3-state outputs allow multiplexed channel sharing. |
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 |
|---|---|---|---|
| SN74LVC374APWR | Lower drive (±24 mA only at 3.3 V), no bus-hold, identical 20-pin TSSOP package | Requires external pullups on unused D inputs; suitable where board space permits discrete biasing | Choose when cost sensitivity outweighs bus-hold convenience and system-level noise immunity is managed elsewhere |
| 74AVC374PW | Wider VCC range (1.2–3.6 V), higher speed (2.1 ns tpd), same pinout but different marking and thermal specs | Better suited for ultra-low-voltage 1.2 V/1.5 V domains; requires revalidation of power sequencing and timing margins | Prefer for next-gen 1.2 V systems where maximum speed and lowest voltage operation are critical |
Compared with SN74ALVCH374DWRG4, SN74LVC374APWR lacks bus-hold and increases design overhead for input biasing, while 74AVC374PW extends voltage range downward but introduces tighter power-supply sequencing constraints and higher thermal impedance in TSSOP.
Availability
SN74ALVCH374DWRG4 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, FPGA configuration interfaces, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74ALVCH374DWRG4 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 logic solutions, with over 90 years of innovation in industrial, automotive, and communications markets.
The SN74ALVCH374 series belongs to TI's advanced low-voltage logic family, engineered for high-speed, low-power, mixed-voltage digital interfacing in space- and power-constrained embedded systems.
FAQ
What is the recommended operating voltage range for SN74ALVCH374DWRG4?
The SN74ALVCH374DWRG4 operates reliably from 1.65 V to 3.6 V. This wide supply range allows seamless integration between 1.8 V, 2.5 V, and 3.3 V logic domains without level shifters. Operation outside this range may cause functional failure or permanent damage, as confirmed by TI's absolute maximum ratings table specifying –0.5 V to 4.6 V as non-operational stress limits.
Does SN74ALVCH374DWRG4 require external pullup resistors on its data inputs?
No, SN74ALVCH374DWRG4 does not require external pullup or pulldown resistors on its D inputs due to integrated bus-hold circuitry. This feature actively maintains valid logic levels on unused or undriven inputs, eliminating floating states. TI explicitly warns against combining external resistors with bus-hold, as it may degrade noise margin or increase power consumption.
What is the maximum clock frequency supported by SN74ALVCH374DWRG4 at 3.3 V?
At 3.3 V, SN74ALVCH374DWRG4 supports a maximum clock frequency of 150 MHz, as specified in the switching characteristics table under fmax. This is enabled by its 3.6 ns maximum propagation delay and tight 2.1 ns setup / 0.5 ns hold timing requirements. Performance degrades at lower VCC: 100 MHz at 1.8 V and 2.5 V per the same datasheet table.
How does the OE pin function during power-up sequences?
The OE pin of SN74ALVCH374DWRG4 must be tied to VCC through a pullup resistor during power-up to ensure outputs remain in high-impedance state until system control is established. TI specifies minimum pullup resistance based on driver sink capability; failure to do so risks bus contention or undefined logic states. OE has no effect on internal latch operation-data can be clocked regardless of OE state.
Is SN74ALVCH374DWRG4 compatible with JEDEC-standard PCB footprints for TSSOP-20 packages?
Yes, SN74ALVCH374DWRG4 uses the standard TSSOP-20 (PW) package per JEDEC MO-153, with 0.65 mm lead pitch and 6.95 mm × 4.4 mm body dimensions. TI provides verified land patterns, stencil designs, and solder paste recommendations aligned with IPC-7351. The device has no exposed thermal pad, simplifying thermal relief design compared to thermally enhanced variants.
SN74ALVCH374DWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVCH
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-SOIC
SN74ALVCH374DWRG4 FAQ
1.How can I place an order for SN74ALVCH374DWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVCH374DWRG4 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 SN74ALVCH374DWRG4 reliable?
The price and inventory of SN74ALVCH374DWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVCH374DWRG4 is usually 5 days.
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4.How is shipping managed for SN74ALVCH374DWRG4?
SN74ALVCH374DWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVCH374DWRG4 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 SN74ALVCH374DWRG4?
For technical support, including SN74ALVCH374DWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVCH374DWRG4 requirements.
6.How does Aetrix verify that SN74ALVCH374DWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74ALVCH374DWRG4 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 SN74ALVCH374DWRG4 meets industry standards.
7.What is the process for return or replacement of SN74ALVCH374DWRG4?
All SN74ALVCH374DWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCH374DWRG4, 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 SN74ALVCH374DWRG4 part is unused and in its original packaging.
Return procedure for SN74ALVCH374DWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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