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Texas Instruments SN74LV374APWR
- Part No.:
- SN74LV374APWR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LV374APWR.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,988
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Product details
Overview
SN74LV374APWR 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. It delivers 9.5 ns maximum propagation delay at 5 V, supports mixed-mode voltage operation on all ports, and features Ioff for partial-power-down mode-enabling use in industrial I/O port buffering and bus interface applications.
For engineers reviewing the SN74LV374APWR datasheet, SN74LV374APWR pinout, SN74LV374APWR application, or SN74LV374APWR equivalent, key selection criteria include its 20-pin TSSOP package, guaranteed 3-state output control via OE, low ground bounce (<0.8 V at 3.3 V), and compatibility with 3.3 V/5 V mixed-signal systems.
Technical Context
The SN74LV374APWR implements eight independent D-type latches triggered on the rising edge of CLK, each with individually controllable 3-state outputs enabled by a common OE input. Its CMOS design ensures rail-to-rail output swing, overvoltage-tolerant inputs (up to 5.5 V), and latch-up immunity exceeding 250 mA per JESD17.
It operates across –40°C to +125°C, supports dynamic noise suppression via low VOLP/VOHV, and integrates Ioff circuitry to block current backflow during power sequencing-critical for hot-swap and multi-rail system designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - enables direct interfacing with 2.5 V, 3.3 V, and 5 V logic domains without level shifters |
| tpd (max) | 9.5 ns at 5 V - supports >100 MHz clock rates in high-speed data capture and register staging |
| IOH/IOL | –16 mA / +16 mA at 5 V - drives moderate capacitive loads (≤50 pF) while limiting ringing and EMI |
| Ioff | ≤5 µA - prevents damaging back-current during partial power-down, satisfying IEC 61000-4-2 system-level ESD robustness requirements |
| VIH/VIL | VCC × 0.77 / VCC × 0.3 - ensures reliable switching margin across full VCC range and temperature |
| Operating Temp | –40°C to +125°C - qualified for industrial control, motor drive, and transportation electronics |
| ESD Rating | ±2000 V HBM - meets standard handling requirements for automated PCB assembly |
Pinout & Package
TSSOP-20 (PW) package: 6.50 mm × 4.40 mm body, 0.65 mm pitch, thin-profile surface-mount construction optimized for high-density PCB layouts and thermal performance (RθJA = 102.4°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE (Pin 1) | Output enable control | Active-low global 3-state enable; must be pulled high via resistor during power-up to guarantee high-impedance default state |
| CLK (Pin 11) | Clock input | Rising-edge sensitive; synchronizes all eight D→Q transfers; requires clean, monotonic transitions to avoid metastability |
| D1–D8 (Pins 3,4,7,8,13,14,17,18) | Data inputs | Overvoltage-tolerant (to 5.5 V); accept 2.5 V/3.3 V/5 V signals regardless of VCC, enabling level translation |
| Q1–Q8 (Pins 2,5,6,9,12,15,16,19) | 3-state outputs | Tri-state capable; high-impedance state isolates bus lines without pull-ups; outputs retain last valid state when OE is inactive |
| VCC (Pin 20) | Power supply | Single-supply rail; decoupling capacitor (0.1 µF) required within 5 mm for stable switching performance |
| GND (Pin 10) | Ground reference | Common return path; must be connected to low-impedance PCB plane to minimize ground bounce (VOLP <0.8 V) |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage operation | Inputs tolerate up to 5.5 V independent of VCC, allowing seamless interfacing between 3.3 V controllers and 5 V peripherals |
| Low ground bounce (VOLP) | Typical <0.8 V at 3.3 V - reduces noise coupling into adjacent analog or RF circuits in mixed-signal boards |
| Ioff partial-power-down support | Blocks current flow when VCC = 0 V - essential for hot-plug I/O modules and modular PLC backplanes |
| 3-state output control | Single OE pin disables all eight outputs simultaneously - simplifies bus arbitration logic and eliminates need for external bus buffers |
| Latch-up immunity | >250 mA per JESD17 - ensures robustness against transient overcurrent events in industrial environments |
Applications
| Programmable Logic Controller (PLC) | DCS and PAC: Analog Input Module |
|---|---|
Use Scenario: Buffering and latching 8-channel analog-to-digital converter (ADC) outputs before serial transmission to CPU. IC Role / Device Role / Timing Role: Edge-triggered register holding sampled data; OE synchronized with ADC conversion complete signal. Use Value: Eliminates need for discrete latches and glue logic; 9.5 ns tpd ensures timing margin for 10 MSPS sampling rates. | Use Scenario: Isolating sensor signal paths in distributed control systems using shared backplane buses. IC Role / Device Role / Timing Role: Bidirectional bus driver with 3-state control; OE managed by master controller to prevent bus contention. Use Value: Ioff protection prevents backfeed during module hot-swap; mixed-voltage tolerance accommodates legacy 5 V and modern 3.3 V sensors. |
| Trains, Trams, and Subway Carriages | AC Inverter Drives |
Use Scenario: Interfacing door control, lighting, and HVAC status signals to central train management unit. IC Role / Device Role / Timing Role: Level-translating I/O expander; D inputs read contact closures, Q outputs drive LED indicators and relays. Use Value: –40°C to +125°C rating ensures reliability in unconditioned under-carriage enclosures; ±2000 V HBM withstands rail-induced ESD. | Use Scenario: Capturing gate driver enable/disable commands and fault feedback from IGBT modules in motor control inverters. IC Role / Device Role / Timing Role: Synchronized command latch; CLK driven by PWM controller, OE tied to system fault flag. Use Value: Low VOLP minimizes noise coupling into sensitive current-sense amplifiers; 3-state outputs allow safe reset without bus disruption. |
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 VCC range (1.65–3.6 V); faster tpd (6.1 ns @ 3.3 V); no 5 V tolerance on inputs | Optimized for 3.3 V-only systems; unsuitable where 5 V peripheral interfacing is required | Select SN74LVC374APWR only if system operates strictly at 3.3 V and demands sub-7 ns timing. |
| 74ACT374SCX | Higher drive (±24 mA); 5 V only; TTL-compatible inputs; no Ioff or mixed-voltage support | Legacy 5 V bus designs with strict TTL thresholds; lacks partial-power-down capability | Choose 74ACT374SCX only for retrofitting existing 5 V TTL systems where Ioff is not needed. |
Compared with SN74LVC374APWR and 74ACT374SCX, the SN74LV374APWR uniquely balances wide VCC range, 5 V-tolerant inputs, Ioff, and industrial temperature support-making it the sole choice for new mixed-voltage, hot-swap-capable industrial I/O designs.
Availability
SN74LV374APWR is available at Aetrix Electronics and suitable for programmable logic controllers, distributed control systems, rail transportation electronics, and AC inverter drives requiring stable component supply across extended temperature and mixed-voltage operating conditions.
Supply support for SN74LV374APWR 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 SN74LV374APWR belongs to TI's LV logic family, engineered for low-voltage, high-noise-immunity digital interfacing in harsh industrial environments with emphasis on power sequencing resilience and mixed-signal compatibility.
FAQ
What is the maximum clock frequency supported by the SN74LV374APWR?
The SN74LV374APWR supports up to 110 MHz maximum clock frequency at 3.3 V with 50 pF load, and up to 75 MHz at 5 V under same conditions. These values derive from fmax specifications in Section 6.7 and 6.8 of the datasheet, measured across the full industrial temperature range (–40°C to +125°C). The actual usable frequency depends on board layout, load capacitance, and signal integrity margins.
Does the SN74LV374APWR require external pull-up resistors on the OE pin?
Yes - to ensure outputs remain in high-impedance state during power-up or power-down, OE must be tied to VCC through an external pull-up resistor. The minimum resistance value depends on the driving source's current-sinking capability; typical values range from 4.7 kΩ to 10 kΩ. This requirement is explicitly stated in Section 8.1 of the SN74LV374APWR datasheet.
Can the SN74LV374APWR interface directly with 5 V logic while powered at 3.3 V?
Yes - the SN74LV374APWR features overvoltage-tolerant inputs rated to 5.5 V regardless of VCC level. When powered at 3.3 V, it safely accepts 5 V input signals (e.g., from legacy microcontrollers or sensors) without damage or level-shifting components, as confirmed in Section 6.3 (Recommended Operating Conditions) and Section 8.3 (Feature Description) of the datasheet.
What thermal metrics apply to the SN74LV374APWR in its TSSOP-20 package?
The SN74LV374APWR in PW (TSSOP-20) package has RθJA = 102.4°C/W, RθJC(top) = 36.5°C/W, and ψJT = 2.4°C/W, per Section 6.4 of the datasheet. These values assume JEDEC-standard PCB mounting (2-layer board, 1-in² copper area). For sustained operation near 125°C ambient, derating is required above ~25 mA total output current due to self-heating.
Is the SN74LV374APWR pin-compatible with other members of the SN74LV374A family?
Yes - all SN74LV374A variants (DB, DW, NS, PW, RGY packages) share identical pin configuration and function mapping per Table 5-1 and Figure 5-1. The SN74LV374APWR uses the same 20-pin layout as SN74LV374ADBR, SN74LV374ADWR, and SN74LV374ANSR, enabling drop-in replacement across package types without PCB redesign.
SN74LV374APWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- 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:
- 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-TSSOP
SN74LV374APWR FAQ
1.How can I place an order for SN74LV374APWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV374APWR 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 SN74LV374APWR reliable?
The price and inventory of SN74LV374APWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV374APWR is usually 5 days.
3.What payment methods are accepted for SN74LV374APWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV374APWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV374APWR?
SN74LV374APWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV374APWR 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 SN74LV374APWR?
For technical support, including SN74LV374APWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV374APWR requirements.
6.How does Aetrix verify that SN74LV374APWR is sourced from the original manufacturer or authorized distributors?
All SN74LV374APWR 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 SN74LV374APWR meets industry standards.
7.What is the process for return or replacement of SN74LV374APWR?
All SN74LV374APWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV374APWR, 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 SN74LV374APWR part is unused and in its original packaging.
Return procedure for SN74LV374APWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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