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Texas Instruments SN74LVC374APWR
- Part No.:
- SN74LVC374APWR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC374APWR.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,400
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Product details
Overview
SN74LVC374APWR from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for 1.65 V to 3.6 V operation. It features 8-bit data latching on the rising clock edge, output-enable control (OE), 5.5-V-tolerant inputs, and a maximum propagation delay of 7.6 ns at 3.3 V and 125°C - enabling high-speed bus interfacing in mixed-voltage systems.
For engineers reviewing the SN74LVC374APWR datasheet, SN74LVC374APWR pinout, SN74LVC374APWR application, or SN74LVC374APWR equivalent, key selection criteria include 3-state drive capability (±24 mA), Ioff support for live insertion, 1.65–3.6 V supply flexibility, and compatibility with 5-V input signals in 3.3-V domains.
Technical Context
This device implements eight independent D-type flip-flops, each synchronized to the rising edge of CLK. Outputs are controlled collectively by OE, which places all Q pins in high-impedance state when asserted low - decoupling the device from the bus without affecting internal latch states.
It supports mixed-mode signal operation: inputs tolerate up to 5.5 V regardless of VCC (1.65–3.6 V), enabling level translation from 5-V logic to 3.3-V systems. The Ioff circuitry ensures no back-drive current flows when VCC = 0 V, satisfying partial-power-down requirements per JESD78.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - enables direct integration into modern low-voltage digital systems while maintaining compatibility with legacy 3.3-V rails. |
| Input Voltage Tolerance | Up to 5.5 V - allows safe connection to 5-V CMOS/TTL sources without external level shifters. |
| tpd (CLK→Q) | 7.6 ns max at VCC = 3.3 V, TA = 125°C - supports reliable 100-MHz bus operation with timing margin. |
| IOL / IOH | ±24 mA at VCC = 3.0 V - drives heavy capacitive loads (e.g., >10 pF per line) or multiple CMOS inputs without buffering. |
| Ioff Current | ±20 μA max at VI/VO = 5.5 V - prevents damaging current flow during hot-plug or power sequencing events. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded applications including control and interface modules. |
Pinout & Package
TSSOP-20 (PW) package: 6.5 mm × 4.4 mm, 0.65 mm pitch, thermally enhanced for surface-mount assembly in space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable Input | Active-low global control: asserts high-impedance on all Q outputs when low; does not affect internal latch state. |
| 2–9, 12–19 (1Q–8Q, 1D–8D) | Output / Data Input | Paired D/Q channels (1–8); each D samples on CLK↑, Q updates synchronously; bidirectional data path when used with bus transceivers. |
| 10 (GND) | Ground Reference | Primary return path for logic and output currents; must be low-impedance and adjacent to bypass capacitor. |
| 11 (CLK) | Clock Input | Rising-edge-triggered; accepts fast transitions (≤10 ns/V slew rate); requires clean, low-jitter source for setup/hold compliance. |
| 20 (VCC) | Power Supply | Single supply for core and I/O; requires local 0.1-μF ceramic bypass capacitor placed within 3 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| 3-State Outputs | Enables shared-bus architectures by electrically isolating outputs without pull-up resistors or external switches. |
| Mixed-Mode Signal Operation | 5.5-V-tolerant inputs allow direct interfacing between 5-V microcontrollers and 3.3-V FPGAs or ASICs. |
| Ioff Support | Prevents current backflow during power-down, supporting hot-swap and partial-power-down system designs. |
| Low Dynamic Power | Typical Cpd = 54.5 pF at 3.3 V - reduces switching noise and total system power in high-frequency data paths. |
| ESD Robustness | Exceeds 2000-V HBM, 1000-V CDM - improves manufacturing yield and field reliability in handling-sensitive environments. |
Applications
| Industrial PLC I/O Expansion | Embedded Microcontroller Bus Interface |
|---|---|
Use Scenario: Expanding GPIO count of a Cortex-M4-based controller to drive 8-channel relay bank and status LEDs. IC Role / Device Role / Timing Role: Acts as output latch and bus driver, holding relay states across MCU sleep cycles while enabling fast update via parallel write. Use Value: Eliminates need for discrete buffers or level shifters; 24-mA drive directly activates 5-V relays; Ioff protects during firmware update resets. | Use Scenario: Interfacing a 5-V legacy sensor hub to a 3.3-V SoC in automotive infotainment head unit. IC Role / Device Role / Timing Role: Translates and latches 8-bit parallel sensor data on rising CLK edge, with OE synchronized to SoC read strobe. Use Value: 5.5-V input tolerance avoids external voltage translators; tpd ≤7.6 ns meets 100-MHz sampling timing budget. |
| Server Baseboard Management Controller (BMC) | Consumer Set-Top Box Front Panel Control |
Use Scenario: Managing hot-swap status indicators and fan speed registers in a 1U rack server BMC. IC Role / Device Role / Timing Role: Latches configuration bits from SPI-to-parallel bridge and drives LED/fan enable lines with 3-state isolation. Use Value: Ioff enables safe insertion/removal of daughter cards; –40°C to +85°C rating ensures operation under full thermal load. | Use Scenario: Controlling IR emitter array, display segment drivers, and button scan matrix in a cable TV set-top box. IC Role / Device Role / Timing Role: Buffers parallel command words from ARM9 host to peripheral ICs, with OE coordinated to avoid bus contention. Use Value: Low 0.55-V VOL at 24 mA ensures clean logic thresholds for downstream 3.3-V receivers; compact TSSOP-20 saves board area. |
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 |
|---|---|---|---|
| SN74LVCH16374ADGG | 16-bit, dual-rail (1.65–3.6 V), higher pin count (48-pin TSSOP), no 5.5-V input tolerance | Suitable for wider data buses; lacks mixed-voltage translation capability | Select when 16-bit width and lower channel density per package are required; avoid if 5-V input interfacing is needed. |
| 74LVC574APW | Same 8-bit function, identical TSSOP-20 package, but only rated to 3.6 V VCC and lacks Ioff specification | Not qualified for partial-power-down; limited ESD robustness (1500-V HBM vs. 2000-V) | Acceptable for cost-sensitive consumer designs without hot-swap or strict power sequencing; verify thermal derating at 125°C. |
Compared with SN74LVCH16374ADGG and 74LVC574APW, the SN74LVC374APWR uniquely combines 5.5-V input tolerance, Ioff, and full industrial temperature range in an 8-bit TSSOP-20 footprint - making it optimal for mixed-voltage, hot-pluggable, or thermally demanding interfaces.
Availability
SN74LVC374APWR is available at Aetrix Electronics and suitable for industrial automation, embedded microcontroller bus expansion, and consumer electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC374APWR 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 focused on analog and embedded processing technologies, serving industrial, automotive, and communications markets with high-reliability components.
The SN74LVC374A product line delivers octal D-type latches optimized for low-voltage, mixed-signal bus interfacing - specifically engineered for robust level translation, high-speed data capture, and seamless integration into power-aware embedded systems.
FAQ
What is the maximum clock frequency supported by the SN74LVC374APWR?
The SN74LVC374APWR supports up to 100 MHz at VCC = 3.3 V and TA = 85°C, with minimum pulse width of 3.3 ns for CLK high/low. At full industrial range (–40°C to 125°C), maximum frequency drops to 80 MHz under same conditions - verified per TI's SCAS296O switching characteristics tables.
Does the SN74LVC374APWR support 5-V input signals while operating at 3.3 V VCC?
Yes, the SN74LVC374APWR accepts input voltages up to 5.5 V regardless of VCC (1.65–3.6 V), enabling direct connection to 5-V logic families without external level shifters - a key feature confirmed in the "Features" and "Recommended Operating Conditions" sections of the datasheet.
What is the purpose of the Ioff specification for the SN74LVC374APWR?
The Ioff specification ensures that when VCC = 0 V, the SN74LVC374APWR's inputs and outputs are effectively isolated - preventing damaging back-current flow during live insertion, partial power-down, or system reset sequences. Measured at ±20 μA max, this feature is critical for hot-swap-capable designs.
Can the SN74LVC374APWR drive standard 5-V TTL loads directly?
No - while inputs tolerate 5.5 V, the SN74LVC374APWR outputs swing only from GND to VCC (max 3.6 V). Its VOH is typically 2.2 V at 3.0 V VCC and 24-mA load, insufficient for TTL VIH (2.0 V min) under worst-case conditions; use with 3.3-V CMOS loads or add a dedicated level translator for TTL compatibility.
What is the thermal resistance (RθJA) of the SN74LVC374APWR in its TSSOP-20 package?
The SN74LVC374APWR in TSSOP-20 (PW) package has a junction-to-ambient thermal resistance (RθJA) of 102.5°C/W, as specified in the Thermal Information table of the datasheet - requiring attention to PCB copper area and airflow in high-density or high-temperature deployments.
SN74LVC374APWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 100 MHz
- Max Propagation Delay @ V, Max CL:
- 7ns @ 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:
- 4 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74LVC374APWR FAQ
1.How can I place an order for SN74LVC374APWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC374APWR 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 SN74LVC374APWR reliable?
The price and inventory of SN74LVC374APWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC374APWR is usually 5 days.
3.What payment methods are accepted for SN74LVC374APWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC374APWR transactions.
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4.How is shipping managed for SN74LVC374APWR?
SN74LVC374APWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC374APWR 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 SN74LVC374APWR?
For technical support, including SN74LVC374APWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC374APWR requirements.
6.How does Aetrix verify that SN74LVC374APWR is sourced from the original manufacturer or authorized distributors?
All SN74LVC374APWR 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 SN74LVC374APWR meets industry standards.
7.What is the process for return or replacement of SN74LVC374APWR?
All SN74LVC374APWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC374APWR, 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 SN74LVC374APWR part is unused and in its original packaging.
Return procedure for SN74LVC374APWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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