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Texas Instruments SN74LV374ANS
- Part No.:
- SN74LV374ANS
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
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SN74LV374ANS.pdf
- Description:
- BUS DRIVER
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Product details
Overview
SN74LV374ANS 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 and used in bus interface, I/O port buffering, and register applications. It delivers 9.5 ns maximum propagation delay at 5 V, supports mixed-mode voltage operation on all ports, and features Ioff partial-power-down capability.
For engineers reviewing the SN74LV374ANS datasheet, SN74LV374ANS pinout, SN74LV374ANS application, or SN74LV374ANS equivalent, key selection criteria include its 20-pin SO (NS) package, 3-state output control via OE, guaranteed timing across –40°C to +125°C, and compatibility with 3.3 V/5 V systems requiring low ground bounce and high noise immunity.
Technical Context
The SN74LV374ANS implements eight independent D-type latches triggered on the rising edge of CLK, with synchronous data capture and asynchronous 3-state output control via OE. Its CMOS design ensures rail-to-rail output swing, overvoltage-tolerant inputs (up to 5.5 V), and Ioff protection enabling safe back-drive prevention during power sequencing.
It operates across a wide VCC range (2 V–5.5 V) with specified switching characteristics at 2.5 V, 3.3 V, and 5 V, including fmax up to 205 MHz (at 5 V, CL = 15 pF) and tpd as low as 4.9 ns (typical). The device meets JESD17 latch-up requirements (>250 mA) and supports industrial temperature operation (–40°C to +125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - enables interoperability between 2.5 V, 3.3 V, and 5 V logic domains without level shifters. |
| tpd (max) | 9.5 ns at VCC = 5 V - guarantees fast data registration for high-speed digital control and sampling applications. |
| fmax | 205 MHz at VCC = 5 V, CL = 15 pF - supports high-throughput bus buffering in programmable logic and industrial controllers. |
| Ioff Support | Yes - prevents damaging current backflow when powered down, critical for hot-swap and partial-power-down system designs. |
| Operating Temp | –40°C to +125°C - qualified for use in harsh environments including motor drives, rail transit, and industrial automation. |
| ESD Rating | ±2000 V HBM - provides robust handling margin during PCB assembly and field service. |
| Output Drive | ±16 mA at VCC = 5 V - sufficient to drive moderate capacitive loads (e.g., 50 pF buses) without external buffers. |
Pinout & Package
SN74LV374ANS is supplied in a 20-pin SO (Small Outline) package (NS), measuring 12.60 mm × 5.30 mm, with gull-wing leads and standard JEDEC MO-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Output Enable input | Active-low control: drives all eight Q outputs into high-impedance state when low; no effect on internal latch operation. |
| 2–9, 12, 15–19 (Q1–Q8) | 3-state output terminals | Octal registered outputs; each reflects corresponding D-input state after CLK↑ when OE is high. |
| 3–4, 7–8, 13–14, 17–18 (D1–D8) | Data input terminals | Eight asynchronous data inputs synchronized to CLK rising edge; tolerant to voltages up to 5.5 V regardless of VCC. |
| 11 (CLK) | Clock input | Rising-edge-triggered; minimum pulse width 5 ns at 5 V ensures reliable setup/hold timing in high-speed designs. |
| 10 (GND) | Ground reference | Primary return path for all I/O and internal circuitry; must be low-inductance connection to minimize ground bounce. |
| 20 (VCC) | Power supply | Single-supply rail supporting 2 V–5.5 V; decoupling capacitor required near pin to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage operation | Inputs accept up to 5.5 V while VCC = 2.5 V or 3.3 V - eliminates need for external level translators in multi-voltage systems. |
| Low ground bounce (VOLP <0.8 V) | Reduces noise coupling to adjacent signals and improves signal integrity in dense PCB layouts with shared ground planes. |
| Output undershoot control (VOHV >2.3 V) | Minimizes false triggering on downstream CMOS inputs by limiting negative voltage excursions during fast transitions. |
| Partial-power-down support (Ioff) | Enables safe isolation of powered-down sections in modular systems - essential for PLC backplane and distributed I/O designs. |
| Industrial temperature range | Rated from –40°C to +125°C - validated for continuous operation in AC inverter drives, train control units, and factory-floor equipment. |
Applications
| Programmable Logic Controller (PLC) | DCS and PAC: Analog Input Module |
|---|---|
Use Scenario: Latching analog channel selection and status flags in modular I/O racks with isolated power domains. IC Role / Device Role / Timing Role: Octal D-flip-flop providing synchronized, glitch-free register storage for multiplexer control and fault reporting bits. Use Value: 3-state outputs enable clean bus sharing among multiple modules; Ioff prevents backfeed during hot-swap insertion/removal. |
Use Scenario: Buffering and isolating ADC result registers before transmission to a central controller over a shared parallel bus. IC Role / Device Role / Timing Role: Edge-triggered register capturing conversion completion signals and digitized values with precise timing alignment. Use Value: Low propagation delay (≤9.5 ns) ensures minimal latency in closed-loop feedback paths; mixed-voltage tolerance simplifies interface to 3.3 V ADCs and 5 V microcontrollers. |
| Trains, Trams, and Subway Carriages | AC Inverter Drives |
Use Scenario: Capturing door status, brake command, and sensor alerts in safety-critical vehicle control subsystems. IC Role / Device Role / Timing Role: Reliable data register holding real-time operational states synchronized to vehicle master clock. Use Value: Extended temperature rating (–40°C to +125°C) and latch-up immunity (>250 mA) meet EN 50155 rail environment requirements. |
Use Scenario: Isolating gate driver control signals from MCU outputs in motor phase control logic. IC Role / Device Role / Timing Role: Output-buffering register driving insulated-gate bipolar transistor (IGBT) gate drivers with controlled slew rate. Use Value: Low ground bounce and undershoot suppression prevent spurious turn-on of power devices; 3-state capability allows dynamic bus reconfiguration during fault recovery. |
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 |
|---|---|---|---|
| SN74LV374APWR | TSSOP-20 (PW) package, 6.50 mm × 4.40 mm - 44% smaller footprint than NS SO package; identical electrical specs and pinout. | Better suited for space-constrained PCBs; requires finer-pitch soldering process and tighter layout control for thermal management. | Select SN74LV374APWR when board area is constrained and automated SMT capability supports 0.65 mm pitch. |
| SN74LV374ADWR | SOIC-20 (DW) package, 12.80 mm × 7.50 mm - larger body size and higher RθJA (102.3°C/W) vs. NS (76.7°C/W); same logic function and timing. | Preferred for manual prototyping or legacy designs using wider trace spacing; lower thermal efficiency limits sustained high-frequency operation. | Choose SN74LV374ADWR for ease of hand-soldering, test fixture compatibility, or backward compatibility with existing DW footprints. |
Compared with SN74LV374APWR and SN74LV374ADWR, the SN74LV374ANS offers the best balance of compactness (vs. DW), manufacturability (vs. PW), and thermal performance (RθJA = 76.7°C/W), making it optimal for industrial control boards requiring reliability, density, and thermal headroom.
Availability
SN74LV374ANS is available at Aetrix Electronics and suitable for programmable logic controllers, distributed control systems, rail vehicle electronics, and AC inverter drives requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LV374ANS 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The SN74LV374A family was developed for robust, low-power bus interfacing in industrial automation - emphasizing wide VCC range, Ioff protection, and noise-immune 3-state operation in harsh operating environments.
FAQ
What is the maximum clock frequency supported by the SN74LV374ANS at 3.3 V?
The SN74LV374ANS supports a maximum clock frequency (fmax) of 150 MHz at VCC = 3.3 V ± 0.3 V with a 15 pF load, and 110 MHz under full industrial temperature range (–40°C to +125°C). These values are measured per TI's SCLS408L specification and reflect guaranteed performance with proper decoupling and layout.
Does the SN74LV374ANS support partial-power-down operation?
Yes, the SN74LV374ANS includes Ioff circuitry that disables outputs and prevents damaging current backflow when VCC = 0 V. This feature is explicitly documented in the datasheet and enables safe integration into systems with staggered power sequencing, such as modular PLC backplanes and hot-swappable I/O cards.
What is the pin-compatible alternative to SN74LV374ANS with a smaller footprint?
The SN74LV374APWR in TSSOP-20 (PW) package is pin-compatible with SN74LV374ANS and shares identical logic behavior, timing, and electrical specifications. Its 6.50 mm × 4.40 mm body reduces PCB area by ~44% compared to the NS package, though it requires tighter SMT process control.
Can the SN74LV374ANS inputs tolerate 5 V when VCC is 3.3 V?
Yes - the SN74LV374ANS inputs are overvoltage tolerant up to 5.5 V regardless of VCC level. When VCC = 3.3 V, inputs may safely accept 5 V logic signals, enabling direct interfacing with legacy 5 V microcontrollers or FPGAs without external level-shifting components.
What is the thermal resistance (RθJA) of the SN74LV374ANS package?
The SN74LV374ANS in SO (NS) package has a junction-to-ambient thermal resistance (RθJA) of 76.7°C/W, as specified in Section 6.4 of the TI datasheet SCLS408L. This value assumes standard JEDEC 2-layer board conditions and informs thermal design margins for continuous operation at elevated ambient temperatures.
SN74LV374ANS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74LV374ANS FAQ
1.How can I place an order for SN74LV374ANS through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV374ANS 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 SN74LV374ANS reliable?
The price and inventory of SN74LV374ANS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV374ANS is usually 5 days.
3.What payment methods are accepted for SN74LV374ANS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV374ANS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV374ANS?
SN74LV374ANS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV374ANS 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 SN74LV374ANS?
For technical support, including SN74LV374ANS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV374ANS requirements.
6.How does Aetrix verify that SN74LV374ANS is sourced from the original manufacturer or authorized distributors?
All SN74LV374ANS 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 SN74LV374ANS meets industry standards.
7.What is the process for return or replacement of SN74LV374ANS?
All SN74LV374ANS units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV374ANS, 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 SN74LV374ANS part is unused and in its original packaging.
Return procedure for SN74LV374ANS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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