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Texas Instruments SN74LVTH273PW
- Part No.:
- SN74LVTH273PW
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVTH273PW.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,797
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Product details
Overview
SN74LVTH273PW from Texas Instruments is an octal positive-edge-triggered D-type flip-flop with direct-clear input, designed for 3.3-V VCC operation while supporting 5-V TTL-level inputs and outputs. It features bus-hold circuitry on all data inputs, Ioff partial-power-down capability, and operates down to 2.7 V. It is used in mixed-voltage interface buffering and clock-synchronized data latching in industrial control backplanes.
For engineers reviewing the SN74LVTH273PW datasheet, SN74LVTH273PW pinout, SN74LVTH273PW application, or SN74LVTH273PW equivalent, key selection criteria include its 8-bit synchronous latch function, TSSOP-20 package thermal performance (θJA = 83°C/W), bus-hold current specification (±750 µA), and compatibility with 3.3-V systems interfacing legacy 5-V logic.
Technical Context
This device implements eight independent edge-triggered D flip-flops sharing a common clock and asynchronous clear. Each flip-flop transfers data from D to Q on the rising edge of CLK, with setup time (tsu) as low as 2.3 ns at VCC = 2.7 V and hold time (th) of 0 ns - enabling high-speed synchronous capture without hold constraints.
The integrated bus-hold circuitry actively maintains valid logic states on undriven data inputs without external resistors, and the Ioff feature disables outputs during power-down to prevent backflow current. Input voltage tolerance extends to 7 V, allowing safe interfacing with 5-V signals while powered from 3.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - supports unregulated battery supply and brownout resilience in portable or industrial systems |
| Max Clock Frequency | 150 MHz - enables high-throughput data staging in real-time control and communication interfaces |
| tsu (Setup Time) | 2.3 ns min at VCC = 2.7 V - allows tight timing margins in fast synchronous buses |
| Ioff | ±100 µA max at VCC = 0 - prevents damaging current flow during hot-insertion or partial power-down |
| Bus-Hold Current | ±750 µA max at VCC = 3.6 V - ensures robust input state retention without pull-up/pull-down components |
| Output Drive | IOL = 64 mA / IOH = −32 mA - drives standard TTL loads directly, eliminating level-shifter requirements |
| θJA | 83°C/W - defines thermal derating in compact PCB layouts using TSSOP-20 package |
Pinout & Package
TSSOP-20 (PW) package: 6.6 mm × 4.5 mm × 1.2 mm body, 0.65 mm lead pitch, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Data Inputs (D1–D8) | Asynchronous data inputs with integrated bus-hold; tolerate 5-V signals while VCC = 3.3 V |
| 9 | Ground (GND) | Reference return path for all internal logic and output drivers |
| 10, 11, 12, 13, 14, 15, 16, 17 | Q Outputs (Q1–Q8) | Registered outputs synchronized to CLK↑; drive TTL-compatible loads up to 64 mA sink |
| 18 | VCC | 3.3-V supply input; supports operation down to 2.7 V with full functionality |
| 19 | CLK | Positive-edge-triggered clock input; threshold referenced to VCC, not signal transition rate |
| 20 | CLR | Asynchronous active-low clear; resets all Q outputs to low independently of CLK |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal interface | Accepts 5-V TTL inputs and delivers 5-V compatible outputs while operating from 3.3-V supply - eliminates external level shifters |
| Integrated bus-hold | Eliminates need for external pull-up/pull-down resistors on all eight D inputs - reduces BOM count and layout area |
| Ioff protection | Disables outputs when VCC = 0 - prevents back-current damage during hot-swap or partial system power-down |
| Low ground bounce (VOLP) | <0.8 V typical at VCC = 3.3 V - minimizes noise coupling into shared ground planes in dense digital systems |
| Latch-up immunity | >500 mA per JESD 17 - ensures robustness against transient overvoltage events in industrial environments |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Synchronizing sensor data from multiple 5-V analog front-ends into a 3.3-V microcontroller domain via shared backplane clock. IC Role / Device Role / Timing Role: Octal D flip-flop acting as a voltage-translating, clock-domain boundary register with simultaneous parallel capture. Use Value: Enables direct 5-V-to-3.3-V data handoff without discrete level shifters or timing-critical glue logic - reducing component count and board space. |
Use Scenario: Latching door lock status, window position, and mirror control signals from legacy 5-V sensors before feeding to 3.3-V CAN controller. IC Role / Device Role / Timing Role: Asynchronous input conditioner and synchronous register providing ESD-hardened, glitch-free signal staging prior to MCU sampling. Use Value: Bus-hold prevents floating inputs during sensor disconnection; Ioff protects during module sleep mode - improving functional safety compliance. |
| Test Equipment Digital Pattern Generator | Network Switch Management Interface |
|
Use Scenario: Generating precise, skew-controlled 8-bit parallel stimulus patterns synchronized to a master test clock in automated test equipment. IC Role / Device Role / Timing Role: High-speed data latch ensuring deterministic setup/hold timing across all eight bits under 150-MHz clocking. Use Value: 2.3-ns setup time and 0-ns hold time allow minimal clock-to-output skew - critical for bit-accurate pattern generation and repeatability. |
Use Scenario: Buffering configuration register writes from a 3.3-V management CPU to legacy 5-V PHY registers in Gigabit Ethernet switch ASICs. IC Role / Device Role / Timing Role: Bidirectional voltage-tolerant interface register isolating CPU write cycles from PHY timing constraints. Use Value: 5-V input tolerance and 64-mA output drive ensure reliable register updates even under noisy board-level conditions - increasing firmware update success rate. |
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 |
|---|---|---|---|
| SN74LVC273PW | No bus-hold; lower drive (IOL = 24 mA); no 5-V tolerant inputs - requires external level shifting for 5-V interface | Suitable only in fully 3.3-V systems; cannot replace SN74LVTH273PW in mixed-voltage designs | Select when cost reduction is prioritized and 5-V signal compatibility is unnecessary |
| 74ALVC273MTCX | Higher speed (225 MHz fmax); no Ioff; 3.3-V-only I/O - lacks 5-V tolerance and partial-power-down protection | Used in high-frequency FPGA I/O expansion where voltage translation is handled elsewhere | Choose for pure 3.3-V, high-clock-rate applications where bus-hold and Ioff are not required |
Compared with SN74LVC273PW and 74ALVC273MTCX, the SN74LVTH273PW uniquely combines 5-V input tolerance, bus-hold, Ioff, and 150-MHz operation - making it the only drop-in solution for legacy-to-modern voltage interface bridging without redesign.
Availability
SN74LVTH273PW is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, and test equipment digital pattern generators requiring stable component supply and long-term manufacturability.
Supply support for SN74LVTH273PW 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 decades of experience in industrial, automotive, and communications markets.
The SN74LVTH273PW belongs to TI's LVTH logic family, engineered specifically for mixed-voltage system interfacing - delivering robust 3.3-V core operation with seamless 5-V signal compatibility and enhanced ESD/latch-up resilience.
FAQ
What is the maximum clock frequency supported by the SN74LVTH273PW?
The SN74LVTH273PW supports a maximum clock frequency of 150 MHz across its full operating temperature range (−40°C to 85°C) and VCC range (2.7 V to 3.6 V). This value is guaranteed under load conditions of CL = 50 pF and is validated per TI's switching characteristics table in the SCBS136M datasheet. The SN74LVTH273PW achieves this performance while maintaining 2.3 ns minimum setup time and zero hold time.
Does the SN74LVTH273PW require external pull-up or pull-down resistors on its data inputs?
No, the SN74LVTH273PW does not require external pull-up or pull-down resistors on its data inputs because it integrates active bus-hold circuitry on all eight D inputs. This feature maintains valid logic states on unused or undriven inputs, with bus-hold current specified as ±750 µA at VCC = 3.6 V. Using external resistors with the SN74LVTH273PW is explicitly discouraged in the datasheet.
Can the SN74LVTH273PW safely interface with 5-V logic while powered from 3.3 V?
Yes, the SN74LVTH273PW is explicitly designed for mixed-mode operation: it accepts 5-V TTL-level inputs (VI up to 5.5 V) and delivers 5-V compatible outputs while operating from a 3.3-V VCC. Its absolute maximum input voltage rating is 7 V, and its VIH/VIL thresholds (2.0 V / 0.8 V) align with standard TTL logic levels - enabling direct connection to legacy 5-V systems without level-shifting components.
What is the purpose of the Ioff feature in the SN74LVTH273PW?
The Ioff feature in the SN74LVTH273PW disables all outputs when VCC = 0 V, preventing damaging current backflow through the device during partial power-down or hot-swap events. With Ioff ≤ ±100 µA at VCC = 0 and VI/VO = 0–4.5 V, the SN74LVTH273PW meets JEDEC standards for live-insertion safety - a critical requirement in modular industrial and telecom systems.
What package type and dimensions does the SN74LVTH273PW use?
The SN74LVTH273PW uses a TSSOP-20 (PW) package: 6.6 mm × 4.5 mm body size, 1.2 mm maximum height, 0.65 mm lead pitch, and gull-wing surface-mount leads. Its thermal resistance is θJA = 83°C/W. The package drawing is documented as PW0020A per JEDEC MO-153, and it is RoHS-compliant with NiPdAu lead finish and MSL Level-1 rating.
SN74LVTH273PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVTH
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 4.9ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Current - Quiescent (Iq):
- 190 µA
- Input Capacitance:
- 4 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74LVTH273PW FAQ
1.How can I place an order for SN74LVTH273PW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVTH273PW 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 SN74LVTH273PW reliable?
The price and inventory of SN74LVTH273PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH273PW is usually 5 days.
3.What payment methods are accepted for SN74LVTH273PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVTH273PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVTH273PW?
SN74LVTH273PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVTH273PW 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 SN74LVTH273PW?
For technical support, including SN74LVTH273PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH273PW requirements.
6.How does Aetrix verify that SN74LVTH273PW is sourced from the original manufacturer or authorized distributors?
All SN74LVTH273PW 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 SN74LVTH273PW meets industry standards.
7.What is the process for return or replacement of SN74LVTH273PW?
All SN74LVTH273PW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH273PW, 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 SN74LVTH273PW part is unused and in its original packaging.
Return procedure for SN74LVTH273PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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