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Texas Instruments SN74ABT273PWR
- Part No.:
- SN74ABT273PWR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ABT273PWR.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,728
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Product details
Overview
SN74ABT273PWR from Texas Instruments is an octal positive-edge-triggered D-type flip-flop with asynchronous clear, designed for high-speed digital logic buffering and storage in 5-V systems. It delivers 64-mA sink and –32-mA source drive strength, supports 150-MHz clock operation at 5 V, and operates across –40°C to 85°C. It is used in address latching, data register staging, and synchronous control path isolation in industrial PLC I/O modules.
For engineers reviewing the SN74ABT273PWR datasheet, SN74ABT273PWR pinout, SN74ABT273PWR application, or SN74ABT273PWR equivalent, key selection criteria include its TSSOP-20 package thermal profile (θJA = 128°C/W), guaranteed setup/hold timing (tsu = 2.5 ns, th = 1.2 ns), and BiCMOS output drive capability under industrial temperature stress.
Technical Context
The SN74ABT273PWR implements eight independent D-type flip-flops sharing a common clock (CLK) and asynchronous clear (CLR) input. Each stage transfers data from D to Q on the rising edge of CLK, with no effect when CLK is static high or low - enabling precise edge-synchronized state capture in pipeline registers.
Its EPIC-IIB BiCMOS process ensures latch-up immunity (>500 mA per JESD-17), low ground bounce (VOLP < 1 V), and rail-to-rail output swing compatible with TTL and CMOS logic families. Input thresholds are fixed at VIH = 2 V and VIL = 0.8 V, eliminating dependency on supply variation for logic-level recognition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Octal D-type flip-flop with asynchronous active-low CLR |
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with regulated 5-V rails and tolerance to line ripple |
| Max Clock Frequency | 150 MHz - supports high-throughput data staging in bus interface logic |
| Output Drive | –32 mA (IOH), +64 mA (IOL) - drives heavy capacitive loads and multiple TTL inputs without external buffers |
| Propagation Delay | tPLH/tPHL ≤ 6.5 ns (CLK→Q) - enables sub-7-ns timing margin in 100+ MHz synchronous designs |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient environments including factory automation controllers |
| Package | TSSOP-20 (PW), 4.4 mm × 6.5 mm, 0.65 mm pitch - surface-mount compatible with automated assembly and space-constrained PCBs |
Pinout & Package
TSSOP-20 (PW) package: 4.4 mm × 6.5 mm body, 0.65 mm lead pitch, 1.2 mm max height, exposed pad not present, RoHS-compliant NiPdAu lead finish, MSL Level-1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CLR | Asynchronous active-low clear - forces all Q outputs low regardless of CLK state |
| 2–9 | D1–D8 | Data inputs - sampled on next CLK↑ if CLR is high |
| 10 | GND | Power ground reference - must be low-impedance for noise suppression and stable switching |
| 11–18 | Q1–Q8 | Registered outputs - retain state until next valid CLK↑ or CLR assertion |
| 19 | VCC | Positive supply (4.5–5.5 V) - requires local 0.1-µF ceramic decoupling adjacent to pin |
| 20 | CLK | Global clock input - triggers simultaneous sampling of all D inputs on rising edge |
Key Features
| Feature | Design Value |
|---|---|
| High-Drive Outputs | 64-mA sink / –32-mA source capability eliminates need for external drivers in backplane or bus-hold applications |
| Low Ground Bounce | VOLP < 1 V at VCC = 5 V ensures signal integrity during simultaneous output switching |
| Latch-Up Immunity | Exceeds 500 mA per JEDEC JESD-17 - prevents destructive failure under transient overvoltage or ESD events |
| Edge-Triggered Timing | Setup time tsu = 2.5 ns and hold time th = 1.2 ns enable reliable operation in fast synchronous pipelines |
| Industrial Temp Range | –40°C to +85°C operation - validated for use in programmable logic controllers and motor drive control boards |
Applications
| Industrial Bus Interface | Programmable Logic Controller (PLC) I/O Staging |
|---|---|
|
Use Scenario: Latching parallel sensor data from analog-to-digital converters before transmission over Modbus RTU or CANopen networks. IC Role / Device Role / Timing Role: Synchronizes asynchronous ADC output bursts into a deterministic clock domain using shared CLK and isolated D/Q paths. Use Value: Eliminates metastability risk during data handoff while supporting 150-MHz internal clocking for real-time response. |
Use Scenario: Holding output command states (e.g., relay actuation signals) between PLC scan cycles in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Acts as an output register bank with global CLR for emergency shutdown sequencing. Use Value: Provides fail-safe state retention and atomic reset capability across eight channels under industrial EMI conditions. |
| Digital Pattern Generation | Address Register Buffering |
|
Use Scenario: Generating repetitive test patterns for memory controller validation in embedded test equipment. IC Role / Device Role / Timing Role: Stores and sequences 8-bit pattern words synchronized to a master system clock. Use Value: Delivers sub-7-ns propagation delay and rail-compatible drive to directly drive FPGA configuration pins or test fixture loads. |
Use Scenario: Isolating microcontroller address bus lines from peripheral decoder logic in multi-chip industrial gateways. IC Role / Device Role / Timing Role: Buffers and retimes address bits to reduce skew and improve timing margin at decoder inputs. Use Value: Enables clean address sampling at 100+ MHz with 64-mA drive strength to overcome trace capacitance and fanout loading. |
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 |
|---|---|---|---|
| SN74ACT273PWR | AC-family TTL-compatible inputs; lower drive (–24 mA / +24 mA); higher ICC (30 mA typical) | Lower speed (125 MHz max), less suitable for high-fanout 5-V bus driving | Prefer when interfacing legacy AC logic or where lower power consumption is secondary to input threshold compatibility |
| SN74LVC273PWR | 3.3-V only supply; LVCMOS thresholds; 24-mA drive; supports partial-power-down (Ioff) | Not 5-V tolerant; requires level-shifting for mixed-voltage systems | Choose for modern low-voltage designs where 3.3-V operation and Ioff protection are required |
Compared with SN74ACT273PWR and SN74LVC273PWR, the SN74ABT273PWR uniquely balances 5-V robustness, 150-MHz performance, and 64-mA drive - making it optimal for industrial 5-V bus interfaces where signal integrity and load driving are critical.
Availability
SN74ABT273PWR is available at Aetrix Electronics and suitable for industrial bus interface, PLC I/O staging, digital pattern generation, and address register buffering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74ABT273PWR 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 heritage in industrial-grade logic families.
The SN74ABT273PWR belongs to TI's ABT-series advanced bi-directional bus transceivers and registers, engineered specifically for high-drive, low-noise, industrial 5-V digital system interfacing and data staging.
FAQ
What is the maximum clock frequency supported by the SN74ABT273PWR?
The SN74ABT273PWR supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C, CL = 50 pF). This rating is maintained across its full industrial temperature range (–40°C to +85°C), with timing parameters derated per datasheet specifications to ensure reliable edge-triggered operation in real-world PCB layouts.
Does the SN74ABT273PWR require external pull-up or pull-down resistors on unused inputs?
Yes - per the SN74ABT273PWR datasheet, all unused inputs must be held high or low to prevent floating. Floating inputs can cause increased ICC, erratic switching, or localized heating due to undefined input stage biasing. For unused D or CLK inputs, tie to VCC or GND via ≤10-kΩ resistor; unused CLR should be tied high to maintain normal operation.
Can the SN74ABT273PWR operate reliably at 4.5 V supply voltage?
Yes - the SN74ABT273PWR is fully specified from 4.5 V to 5.5 V. At VCC = 4.5 V, it maintains tsu = 2.5 ns, th = 1.2 ns, and output drive of –32 mA / +64 mA, ensuring compatibility with brown-out conditions and aging 5-V supplies in industrial power systems.
What is the thermal resistance (θJA) of the SN74ABT273PWR in its TSSOP-20 package?
The SN74ABT273PWR in the PW (TSSOP-20) package has a specified junction-to-ambient thermal resistance (θJA) of 128°C/W under standard JEDEC test conditions. This value assumes a two-layer PCB with minimal copper pour; actual thermal performance improves significantly with internal ground/power planes and thermal vias beneath the package body.
Is the SN74ABT273PWR pin-compatible with other members of the '273 family such as SN74LS273 or SN74HC273?
No - the SN74ABT273PWR is not pin-compatible with SN74LS273 (DIP-20) or SN74HC273 (SOIC-20 or TSSOP-20). While all share identical logic function and pin numbering, the SN74ABT273PWR uses the PW (TSSOP-20) footprint with 0.65-mm pitch, whereas LS273 uses 2.54-mm DIP spacing and HC273 variants use either 1.27-mm SOIC or 0.65-mm TSSOP - requiring board redesign for substitution.
SN74ABT273PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 6.8ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 400 µA
- Input Capacitance:
- 7 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74ABT273PWR FAQ
1.How can I place an order for SN74ABT273PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT273PWR 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 SN74ABT273PWR reliable?
The price and inventory of SN74ABT273PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT273PWR is usually 5 days.
3.What payment methods are accepted for SN74ABT273PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT273PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT273PWR?
SN74ABT273PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT273PWR 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 SN74ABT273PWR?
For technical support, including SN74ABT273PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT273PWR requirements.
6.How does Aetrix verify that SN74ABT273PWR is sourced from the original manufacturer or authorized distributors?
All SN74ABT273PWR 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 SN74ABT273PWR meets industry standards.
7.What is the process for return or replacement of SN74ABT273PWR?
All SN74ABT273PWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT273PWR, 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 SN74ABT273PWR part is unused and in its original packaging.
Return procedure for SN74ABT273PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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