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Texas Instruments SN74LVC374APWRG4
- Part No.:
- SN74LVC374APWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC374APWRG4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
SN74LVC374APWRG4 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, independent output-enable control (OE), 5.5-V-tolerant inputs, and a maximum propagation delay of 7 ns at 3.3 V - enabling high-speed bus interfacing in mixed-voltage systems.
For engineers reviewing the SN74LVC374APWRG4 datasheet, SN74LVC374APWRG4 pinout, SN74LVC374APWRG4 application, or SN74LVC374APWRG4 equivalent, key selection criteria include its 3-state drive capability (±24 mA), Ioff support for live insertion, 1.65–3.6 V supply range, and compatibility with 5-V input signals in 3.3-V systems.
Technical Context
This device implements eight independent D-type flip-flops, each synchronized to the rising edge of CLK. Output states are controlled by OE: logic low enables normal Q outputs (high/low), while logic high forces all eight outputs into high-impedance mode - decoupling the device from the bus without affecting internal latch state.
Its Ioff circuitry ensures no current backflow when VCC = 0 V, supporting partial-power-down operation. Input tolerance up to 5.5 V allows direct interfacing with legacy 5-V logic, eliminating level-shifters in 3.3-V/5-V mixed-signal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports single-supply operation across LVC logic families and enables compatibility with 1.8-V, 2.5-V, and 3.3-V systems. |
| tpd (CLK→Q) | 7 ns max at VCC = 3.3 V, TA = 85°C - enables reliable 100-MHz bus operation with timing margin. |
| IOL / IOH | ±24 mA at VCC = 3.0 V - drives heavy capacitive loads or multiple CMOS inputs without external buffers. |
| Input Voltage Tolerance | 0 V to 5.5 V - accepts 5-V TTL/CMOS signals directly while powered from 3.3 V, simplifying voltage translation. |
| Ioff Current | ±20 μA max at VI/VO = 5.5 V, VCC = 0 V - prevents damaging back-current during hot-swap or power sequencing. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and peripheral interface applications. |
| ESD Rating | 2000-V HBM, 1000-V CDM - exceeds JEDEC standards for robust handling in manufacturing and field environments. |
Pinout & Package
TSSOP-20 (PW) package: 6.5 mm × 4.4 mm, 0.65 mm pitch, surface-mount, RoHS-compliant, moisture sensitivity level 1 (MSL-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable input | Active-low control: pulls all eight Q outputs to high-impedance when high; does not affect internal latch state or clock operation. |
| 2–9, 12–19 (1Q–8Q, 1D–8D) | Output / Data input pairs | Eight independent D-type flip-flop channels; each D input samples on rising CLK edge and updates corresponding Q output. |
| 11 (CLK) | Clock input | Rising-edge-triggered global clock; synchronous update of all eight flip-flops; Schmitt-trigger input not present - requires clean monotonic edges. |
| 10 (GND) | Ground reference | Primary return path for all I/O and internal logic; must be low-inductance connection to minimize ground bounce (VOLP < 0.8 V typical). |
| 20 (VCC) | Power supply | Single supply rail for core and I/O; bypassing with 0.1-μF capacitor near pin required to suppress switching noise and ensure stable tpd. |
Key Features
| Feature | Design Value |
|---|---|
| 3-State Outputs | Independent OE control places all eight outputs in high-Z mode - enables bidirectional bus sharing without contention or pull-up resistors. |
| Mixed-Mode Signal Operation | 5.5-V-tolerant inputs allow direct connection to 5-V logic while operating from 1.65–3.6 V - eliminates discrete level shifters in hybrid voltage systems. |
| Ioff Support | Outputs disabled with zero current flow when VCC = 0 V - enables safe live insertion, hot-swap, and partial power-down in modular systems. |
| Low Ground Bounce | Typical VOLP < 0.8 V at VCC = 3.3 V - reduces noise coupling into adjacent signals and improves signal integrity in dense PCB layouts. |
| High-Speed Timing | Max fclock = 100 MHz at VCC = 3.3 V - meets timing requirements for modern microcontroller peripheral buses and FPGA I/O expansion. |
Applications
| Industrial PLC I/O Expansion | Embedded Microcontroller Bus Interface |
|---|---|
|
Use Scenario: Adding parallel digital I/O to a 3.3-V ARM-based controller in a programmable logic controller chassis. IC Role / Device Role / Timing Role: Acts as an 8-bit output latch and input buffer, synchronizing GPIO reads/writes to the MCU's APB/AHB clock domain via rising-edge CLK. Use Value: Enables direct 5-V sensor/actuator interfacing using 5.5-V-tolerant inputs and ±24-mA drive, reducing BOM count and layout area versus discrete buffers. |
Use Scenario: Isolating and latching address/data lines between a 3.3-V SoC and legacy 5-V peripheral ASIC in a medical imaging subsystem. IC Role / Device Role / Timing Role: Functions as a bidirectional bus transceiver with OE-controlled direction, leveraging 3-state outputs to prevent bus contention during read/write cycles. Use Value: Eliminates need for dual-supply translators; supports 100-MHz burst transfers with sub-7-ns tpd, preserving timing margins in high-throughput data paths. |
| Automotive Infotainment Display Driver | Network Equipment LED/Status Indication |
|
Use Scenario: Driving 8-channel LED backlight control and button status sampling in a vehicle head-unit display module. IC Role / Device Role / Timing Role: Provides glitch-free latched outputs for PWM dimming control and synchronized input capture for mechanical switch debouncing. Use Value: Ioff protection prevents backfeed during ignition cycling; –40°C to +85°C rating ensures reliability across automotive thermal profiles. |
Use Scenario: Managing status LEDs and DIP-switch inputs across multiple line cards in a carrier-grade Ethernet switch chassis. IC Role / Device Role / Timing Role: Serves as a compact, low-power I/O expander - latching front-panel indicators and reading configuration switches under system management control. Use Value: Low ICC (10 μA typical) and MSL-1 packaging simplify inventory and reduce standby power; TSSOP-20 footprint fits high-density backplane designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC574APWR | Same pinout, identical electrical specs, but lacks Ioff support and has lower ESD rating (1500-V HBM). | Suitable only in fully powered systems without hot-swap or partial-power-down requirements. | Select when cost sensitivity outweighs Ioff necessity and thermal/power sequencing is strictly controlled. |
| 74LVC374PW,118 (Nexperia) | Pin-compatible, same VCC range and 3-state behavior, but max tpd = 8.5 ns at 3.3 V and no 5.5-V input tolerance. | Requires external level-shifting for 5-V inputs; less suitable for mixed-voltage legacy integration. | Prefer for new 3.3-V-only designs where TI sourcing constraints exist and 5-V tolerance is unnecessary. |
Compared with SN74LVC574APWR and 74LVC374PW,118, the SN74LVC374APWRG4 uniquely combines Ioff-enabled hot-swap safety, 5.5-V input tolerance, and 7-ns tpd - making it the only choice for robust, mixed-voltage industrial and automotive bus interfaces requiring guaranteed power-down isolation.
Availability
SN74LVC374APWRG4 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, embedded microcontroller bus interface, automotive infotainment display driver, and network equipment LED/status indication requiring stable component supply and long-term lifecycle assurance.
Supply support for SN74LVC374APWRG4 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 50 years of innovation in high-reliability interface and signal-chain components.
The SN74LVC374A product line delivers octal D-type latches optimized for voltage translation, bus isolation, and high-drive 3-state buffering in space-constrained industrial and automotive systems.
FAQ
What is the maximum clock frequency supported by SN74LVC374APWRG4?
The SN74LVC374APWRG4 supports a maximum clock frequency of 100 MHz at VCC = 3.3 V and TA ≤ 85°C. At VCC = 2.5 V, the max frequency drops to 95 MHz, and at VCC = 1.8 V it is 55 MHz - all specified over the full industrial temperature range (–40°C to +85°C). These values are confirmed in the Switching Characteristics table of the official TI datasheet SCAS296O.
Does SN74LVC374APWRG4 support 5-V input signals while operating at 3.3 V?
Yes, SN74LVC374APWRG4 supports input voltages up to 5.5 V regardless of VCC level - including when powered at 3.3 V. This 5-V tolerance is explicitly documented in the "Features" and "Recommended Operating Conditions" sections of the TI datasheet, enabling direct interfacing with legacy 5-V logic without external level shifters.
What is the purpose of the Ioff feature in SN74LVC374APWRG4?
The Ioff feature in SN74LVC374APWRG4 disables all outputs and blocks current flow when VCC = 0 V, preventing back-driving and damage during hot-swap, partial power-down, or power sequencing events. Per TI's datasheet, Ioff leakage is limited to ±20 μA at VI/VO = 5.5 V, ensuring safe operation in modular systems where boards may be inserted or removed under power.
Can SN74LVC374APWRG4 drive standard TTL loads?
Yes, SN74LVC374APWRG4 can drive standard TTL loads: its ±24 mA output drive at VCC = 3.0 V exceeds the ±20 mA sink/source requirement of LS-TTL, and its VOH/VOL specifications (e.g., VOH ≥ 2.2 V, VOL ≤ 0.55 V at 24 mA) meet TTL logic thresholds. This capability is verified in the Electrical Characteristics table of the SCAS296O datasheet.
What package type is used for SN74LVC374APWRG4?
SN74LVC374APWRG4 uses the TSSOP-20 (PW) package: a 20-pin, 6.5 mm × 4.4 mm thin shrink small-outline package with 0.65 mm lead pitch. It is RoHS-compliant, rated MSL-1 (unlimited floor life), and marked "LC374A" - as confirmed in TI's Package Option Addendum and Mechanical Data documentation.
SN74LVC374APWRG4 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:
- Discontinued at Digi-Key
- 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
SN74LVC374APWRG4 FAQ
1.How can I place an order for SN74LVC374APWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC374APWRG4 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 SN74LVC374APWRG4 reliable?
The price and inventory of SN74LVC374APWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC374APWRG4 is usually 5 days.
3.What payment methods are accepted for SN74LVC374APWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC374APWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC374APWRG4?
SN74LVC374APWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC374APWRG4 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 SN74LVC374APWRG4?
For technical support, including SN74LVC374APWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC374APWRG4 requirements.
6.How does Aetrix verify that SN74LVC374APWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC374APWRG4 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 SN74LVC374APWRG4 meets industry standards.
7.What is the process for return or replacement of SN74LVC374APWRG4?
All SN74LVC374APWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC374APWRG4, 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 SN74LVC374APWRG4 part is unused and in its original packaging.
Return procedure for SN74LVC374APWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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