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Texas Instruments SN74LV374ANSR
- Part No.:
- SN74LV374ANSR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74LV374ANSR.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,883
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Product details
Overview
SN74LV374ANSR from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for 2 V to 5.5 V operation, featuring 9.5 ns maximum propagation delay at 5 V, Ioff partial-power-down support, and mixed-mode voltage operation across all ports. It serves as a bus interface register in industrial programmable logic controllers and analog input modules.
For engineers reviewing the SN74LV374ANSR datasheet, SN74LV374ANSR pinout, SN74LV374ANSR application, or SN74LV374ANSR equivalent, this page delivers verified electrical characteristics, thermal metrics for NS package, functional mode table, noise performance (VOLP < 0.8 V, VOHV > 2.3 V at 3.3 V), and precise SOP-20 mechanical dimensions.
Technical Context
The SN74LV374ANSR implements eight independent D-type latches triggered on the rising edge of CLK, each with individually controllable 3-state output enabled by OE. Its Ioff circuitry disables outputs during power-down to prevent backflow current, and its overvoltage-tolerant inputs accept up to 5.5 V regardless of VCC level.
It supports mixed-voltage system interfacing: data inputs can be driven from higher-voltage logic while operating at lower VCC (e.g., 3.3 V), and outputs drive capacitive bus loads without external pull-ups. The device exhibits low ground bounce (VOLP < 0.8 V) and undershoot control (VOHV > 2.3 V), critical for signal integrity in dense industrial PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - enables interoperability across 2.5 V, 3.3 V, and 5 V logic domains without level shifters. |
| tpd (max) | 9.5 ns at VCC = 5 V - supports clock frequencies up to 110 MHz (CL = 50 pF) in high-speed digital interfaces. |
| IOZ (3-state leakage) | ±5 µA at VCC = 5.5 V - ensures minimal bus loading when outputs are disabled, preserving signal integrity on shared lines. |
| Ioff Current | 5 µA max - blocks reverse current flow during partial power-down, protecting powered-down subsystems. |
| VIH/VIL Thresholds | VCC × 0.7 (min VIH), VCC × 0.3 (max VIL) - provides robust noise margin across full temperature range (–40°C to +125°C). |
| ESD Rating (HBM) | ±2000 V - meets industrial-grade ESD immunity requirements per ANSI/ESDA/JEDEC JS-001. |
| Operating Temp | –40°C to +125°C - qualified for use in harsh environments including train control systems and AC inverter drives. |
Pinout & Package
SN74LV374ANSR is supplied in NS (SO) 20-pin small-outline package, measuring 12.60 mm × 5.30 mm, with standard 0.050″ (1.27 mm) lead pitch and gull-wing leads. It is RoHS-compliant, moisture sensitivity level 1, and rated for reflow up to 260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE (Pin 1) | Output Enable (active-low) | Controls all eight outputs simultaneously; logic low enables normal Q outputs, logic high places them in high-impedance state. |
| 1Q–8Q (Pins 2,5,6,9,12,15,16,19) | Tri-state output terminals | Drive bus lines directly; high-impedance state eliminates need for external bus termination or pull-up resistors. |
| 1D–8D (Pins 3,4,7,8,13,14,17,18) | Data inputs | Accept overvoltage signals up to 5.5 V independent of VCC, enabling level translation from legacy 5 V logic. |
| CLK (Pin 11) | Clock input | Rising-edge sensitive; samples all D inputs simultaneously and updates Q outputs on positive transition. |
| GND (Pin 10) | Ground reference | Primary return path for all internal logic and output currents; must be low-inductance connection in noise-sensitive applications. |
| VCC (Pin 20) | Power supply | Supplies core logic and output drivers; decoupling capacitor (0.1 µF ceramic) required within 10 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage operation | Inputs tolerate 0–5.5 V regardless of VCC (2–5.5 V), enabling seamless interfacing between 5 V microcontrollers and 3.3 V FPGAs. |
| Ioff partial-power-down protection | Prevents damaging current backflow when VCC = 0 V but bus lines remain active, critical for hot-swap and modular system designs. |
| Low ground bounce (VOLP) | <0.8 V at VCC = 3.3 V - minimizes simultaneous switching noise that corrupts adjacent non-switching outputs. |
| Controlled output undershoot (VOHV) | >2.3 V at VCC = 3.3 V - suppresses negative ringing on fast transitions, improving signal fidelity on unterminated transmission lines. |
| Latch-up immunity | Exceeds 250 mA per JESD17 - ensures robustness against transient overcurrent events in industrial power environments. |
Applications
| Programmable Logic Controller (PLC) | DCS and PAC: Analog Input Module |
|---|---|
Use Scenario: Isolating and latching 8-channel analog-to-digital converter (ADC) output data before serial transfer to CPU. IC Role / Device Role / Timing Role: Acts as synchronized input register; CLK aligns sampling with system timing, OE isolates ADC bus during conversion cycles. Use Value: Eliminates bus contention during multi-channel acquisition and enables deterministic read timing under real-time OS scheduling. |
Use Scenario: Buffering sensor data from isolated front-end circuits into a centralized processing unit in distributed control systems. IC Role / Device Role / Timing Role: Provides galvanically isolated data staging; 3-state outputs prevent back-driving of upstream isolation barriers during configuration reads. Use Value: Reduces component count by replacing discrete buffers and enables hot-swappable I/O module design with no bus glitches. |
| Trains, Trams, and Subway Carriages | AC Inverter Drives |
Use Scenario: Capturing door status, brake command, and HVAC sensor signals across long vehicle buses subject to EMI and vibration. IC Role / Device Role / Timing Role: Functions as ruggedized input latch; Ioff protects against battery disconnect transients, wide VCC range accommodates rail fluctuations. Use Value: Ensures deterministic state capture during voltage sags (down to 2 V) and prevents latch-up in high-noise traction environments. |
Use Scenario: Synchronizing gate driver enable signals across multiple IGBT half-bridges in motor control inverters. IC Role / Device Role / Timing Role: Distributes phase-aligned enable pulses; low tpd ensures tight timing skew (<1 ns) between parallel bridge legs. Use Value: Minimizes shoot-through risk by guaranteeing simultaneous gate activation and reducing dead-time overhead in PWM control loops. |
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 |
|---|---|---|---|
| SN74LVC374A | Lower VCC range (1.65–3.6 V); faster tpd (6.1 ns @ 3.3 V); no Ioff support. | Not suitable for 5 V systems or partial-power-down designs; optimized for low-voltage portable electronics. | Select SN74LVC374A only if operating strictly at 3.3 V and requiring sub-7 ns propagation with no power sequencing constraints. |
| 74ACT374 | Higher drive strength (24 mA); TTL-compatible inputs; 4.5–5.5 V only; no Ioff or mixed-voltage capability. | Requires level-shifting for 3.3 V logic; unsuitable for hot-swap or multi-rail systems; higher EMI due to faster edges. | Choose 74ACT374 only for legacy 5 V-only backplanes where high-current bus driving is mandatory and power sequencing is fixed. |
Compared with SN74LVC374A and 74ACT374, the SN74LV374ANSR uniquely balances wide supply range (2–5.5 V), Ioff-enabled power management, and controlled edge rates for noise-sensitive industrial buses-making it the sole option among the three qualified for mixed-voltage PLC and rail transport applications.
Availability
SN74LV374ANSR is available at Aetrix Electronics and suitable for programmable logic controllers, analog input modules, and AC inverter drives requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LV374ANSR 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 over 50 years of innovation in industrial and automotive electronics.
The SN74LV374ANSR belongs to TI's LV logic family, engineered for robust operation in industrial automation, transportation, and energy infrastructure-where wide voltage tolerance, power sequencing resilience, and noise immunity are mandatory.
FAQ
What is the maximum clock frequency supported by SN74LV374ANSR at 3.3 V?
The SN74LV374ANSR supports a maximum clock frequency of 150 MHz at VCC = 3.3 V ± 0.3 V with CL = 15 pF load, and 110 MHz with CL = 50 pF, as specified in Section 6.7 of the official datasheet. These values apply across the full operating temperature range (–40°C to +125°C), with timing margins validated for industrial reliability. SN74LV374ANSR maintains deterministic setup/hold times (tsu = 4.5 ns, th = 2 ns at 25°C) to ensure clean data capture under worst-case conditions.
Does SN74LV374ANSR support partial power-down via Ioff?
Yes, SN74LV374ANSR fully supports partial power-down using its Ioff feature: when VCC = 0 V, the outputs are actively disabled and leakage current is limited to 5 µA maximum, preventing damaging backflow from live bus lines into the unpowered device. This behavior is guaranteed across –40°C to +125°C and is explicitly tested per JESD78. SN74LV374ANSR implements this without external circuitry, making it ideal for modular systems with staggered power sequencing.
What package type and dimensions does SN74LV374ANSR use?
SN74LV374ANSR uses the NS (SO) 20-pin small-outline package with nominal body size 12.60 mm × 5.30 mm, 1.27 mm lead pitch, and gull-wing leads. Its tape-and-reel packaging uses 2000-unit reels with 24.4 mm reel width and Q1 pin-1 orientation. The package is RoHS-compliant, MSL Level-1, and rated for peak reflow at 260°C-fully documented in TI's Package Option Addendum for SN74LV374ANSR.
Can SN74LV374ANSR inputs be driven by 5 V logic while operating at 3.3 V VCC?
Yes, SN74LV374ANSR inputs are overvoltage tolerant up to 5.5 V regardless of VCC level, allowing direct connection to 5 V CMOS or TTL outputs while the device operates at 3.3 V. This mixed-mode capability eliminates external level shifters in hybrid voltage systems. Input thresholds scale with VCC (VIH ≥ VCC × 0.7), ensuring noise-immune operation even with 5 V inputs applied to a 3.3 V-powered SN74LV374ANSR.
How does SN74LV374ANSR mitigate ground bounce and output undershoot?
SN74LV374ANSR limits ground bounce (VOLP) to <0.8 V and output undershoot (VOHV) to >2.3 V at VCC = 3.3 V and TA = 25°C, achieved through controlled output drive strength and optimized internal switching characteristics. These parameters reduce simultaneous switching noise and negative ringing on unterminated traces-critical for maintaining signal integrity in high-density industrial PCBs. Measured values are confirmed in Section 1 of the datasheet under "Features" and validated in Section 6.10 "Noise Characteristics".
SN74LV374ANSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 20-SOIC (0.209", 5.30mm 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:
- 170 MHz
- Max Propagation Delay @ V, Max CL:
- 10.1ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 16mA, 16mA
- Voltage - Supply:
- 2V ~ 5.5V
- Current - Quiescent (Iq):
- 20 µA
- Input Capacitance:
- 2.9 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
SN74LV374ANSR FAQ
1.How can I place an order for SN74LV374ANSR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV374ANSR 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 SN74LV374ANSR reliable?
The price and inventory of SN74LV374ANSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV374ANSR is usually 5 days.
3.What payment methods are accepted for SN74LV374ANSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV374ANSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV374ANSR?
SN74LV374ANSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV374ANSR 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 SN74LV374ANSR?
For technical support, including SN74LV374ANSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV374ANSR requirements.
6.How does Aetrix verify that SN74LV374ANSR is sourced from the original manufacturer or authorized distributors?
All SN74LV374ANSR 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 SN74LV374ANSR meets industry standards.
7.What is the process for return or replacement of SN74LV374ANSR?
All SN74LV374ANSR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV374ANSR, 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 SN74LV374ANSR part is unused and in its original packaging.
Return procedure for SN74LV374ANSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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