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Texas Instruments CD74ACT273MPWREP
- Part No.:
- CD74ACT273MPWREP
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CD74ACT273MPWREP.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,157
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Product details
Overview
CD74ACT273MPWREP from Texas Instruments is an octal D-type flip-flop with asynchronous master reset, fabricated in ACT CMOS technology. It operates at 4.5V–5.5V supply, delivers ±24mA output drive, exhibits 3.5ns typical propagation delay (CP to Qn, VCC = 5V), and supports industrial temperature range (–55°C to +125°C). It serves as a synchronous data latch in digital control logic, bus interface buffering, and state register stages.
For engineers reviewing the CD74ACT273MPWREP datasheet, CD74ACT273MPWREP pinout, CD74ACT273MPWREP application, or CD74ACT273MPWREP equivalent, key selection criteria include its TTL-compatible input thresholds, rail-to-rail output swing, 97MHz maximum clock frequency, and TSSOP-20 packaging for high-density PCB layouts.
Technical Context
The CD74ACT273MPWREP implements eight edge-triggered D flip-flops sharing a common rising-edge clock (CP) and active-low asynchronous master reset (!MR). Its ACT logic family ensures TTL-level input compatibility (VIL ≤ 0.8V, VIH ≥ 2.0V at VCC = 4.5–5.5V) and robust noise immunity across the full operating temperature range.
Each output provides ±24mA DC drive capability-sufficient to fan out to 15 FAST™ ICs or directly terminate 50Ω transmission lines. The device features SCR-latchup-resistant construction and meets ±2000V HBM ESD rating, enabling reliable operation in harsh industrial environments without external protection circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ACT (Advanced CMOS TTL-compatible), ensuring interoperability with legacy 74LS/FAST systems without level shifters |
| Supply Voltage Range | 4.5V–5.5V - fixed-rail operation compatible with standard 5V digital systems; no 3.3V support |
| Propagation Delay (CP→Qn) | 3.5ns typical at VCC = 5V, TA = 25°C - enables reliable operation up to 97MHz clock frequency |
| Output Drive Current | ±24mA per output - sufficient to drive 50Ω transmission lines or load 15 FAST™ inputs directly |
| Operating Temperature | –55°C to +125°C - qualified for extended industrial, aerospace, and defense applications |
| ESD Rating (HBM) | ±2000V - exceeds JEDEC JS-001 requirements, reducing need for board-level ESD protection |
| Input Thresholds | VIH ≥ 2.0V, VIL ≤ 0.8V - guarantees clean recognition of TTL logic levels across full voltage and temperature range |
Pinout & Package
TSSOP-20 package (PW), 5.00 mm × 6.4 mm body size, 0.65 mm lead pitch, 2.0 mm max height, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 !MR | Asynchronous master reset input | Active-low; forces all Q outputs low independently of clock edge; requires stable low pulse ≥4.4ns |
| 2 Q0 | Data output 0 | Non-inverted registered output corresponding to D0; drives ±24mA, rail-to-rail swing |
| 3 D0 | Data input 0 | Synchronously latched on rising CP edge; TTL-compatible thresholds ensure robust noise margin |
| 4 D1 | Data input 1 | Independent D input for second flip-flop; identical timing and electrical characteristics to D0 |
| 5 Q1 | Data output 1 | Non-inverted output for D1; electrically isolated from other outputs except shared VCC/GND |
| 6 Q2 | Data output 2 | Third registered output; maintains 3.5ns tPLH/tPHL matching across all eight channels |
| 7 D2 | Data input 2 | Third D input; part of octal group with common CP and !MR control signals |
| 8 D3 | Data input 3 | Fourth D input; supports parallel data capture from 8-bit buses or microcontroller GPIO ports |
| 9 Q3 | Data output 3 | Fourth Q output; capable of driving transmission lines or logic loads without external buffers |
| 10 GND | Ground reference | Primary power return; must be low-impedance connection to minimize ground bounce during switching |
| 11 CP | Clock input | Rising-edge triggered; minimum pulse width 5.3ns; setup/hold times both 2ns for Dn and !MR |
| 12 Q4 | Data output 4 | Fifth Q output; matches timing specs of Q0–Q3; supports cascaded register chains |
| 13 D4 | Data input 4 | Fifth D input; enables full 8-bit parallel data capture synchronized to single clock edge |
| 14 D5 | Data input 5 | Sixth D input; used in byte-wide data path applications such as address latching or status capture |
| 15 Q5 | Data output 5 | Sixth Q output; maintains consistent propagation delay and output drive across all channels |
| 16 Q6 | Data output 6 | Seventh Q output; supports multi-stage pipeline registers where skew between outputs must be minimized |
| 17 D6 | Data input 6 | Seventh D input; allows full utilization of octal structure for compact 8-bit storage elements |
| 18 D7 | Data input 7 | Eighth D input; completes parallel interface for microprocessor data bus or sensor array outputs |
| 19 Q7 | Data output 7 | Eighth Q output; final stage of octal register; enables complete byte-wide storage with single-clock update |
| 20 VCC | Positive supply | 4.5V–5.5V DC supply; requires local 0.1µF ceramic bypass capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input thresholds | Ensures direct interfacing with 74LS, 74F, and FAST logic families without level-shifting circuitry |
| ±24mA output drive per pin | Eliminates need for external buffer drivers when terminating 50Ω lines or loading multiple logic inputs |
| SCR-latchup-resistant process | Guarantees immunity to destructive latch-up events under transient overvoltage or ESD stress |
| Industrial temperature range (–55°C to +125°C) | Supports deployment in avionics, downhole tools, and motor control systems without derating |
| Low 3.5ns typical propagation delay | Enables high-speed synchronous designs including real-time control loops and data acquisition pipelines |
Applications
| Industrial PLC I/O Expansion | Avionics Data Acquisition Interface |
|---|---|
|
Use Scenario: Latching 8-bit sensor data from analog-to-digital converters in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Synchronous data register capturing parallel ADC output on system clock edge; !MR clears stale values during power-up or fault recovery. Use Value: Eliminates metastability risk via controlled edge-triggered sampling and provides deterministic reset behavior across –55°C to +125°C. |
Use Scenario: Buffering discrete flight-control signals (gear position, flap angle, brake status) before multiplexing into ARINC 429 transmitters. IC Role / Device Role / Timing Role: Octal D flip-flop acting as a synchronized input conditioner, aligning asynchronous mechanical switch closures to the avionics master clock domain. Use Value: ±24mA drive ensures clean signal integrity over long harness runs; HBM ±2000V rating withstands aircraft static discharge events. |
| Motor Drive Control Register | Test Equipment Digital Pattern Generator |
|
Use Scenario: Holding PWM duty-cycle commands and direction bits for three-phase inverter gate drivers in servo amplifiers. IC Role / Device Role / Timing Role: Static configuration register updated only during motion idle periods; outputs drive optocoupler inputs or level translators feeding IGBT gate drivers. Use Value: Rail-to-rail CMOS outputs provide full logic swing to downstream isolation stages; low propagation delay (<13.5ns max) ensures precise timing alignment. |
Use Scenario: Generating repeatable 8-bit stimulus patterns for functional testing of microcontroller peripherals (UART, SPI, GPIO). IC Role / Device Role / Timing Role: Pattern register clocked by test sequencer; !MR initializes known state before each test vector sequence. Use Value: 97MHz max clock frequency supports high-speed digital test vectors; TSSOP-20 footprint enables dense placement on automated test equipment PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D flip-flop with reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT273PWR | Same ACT logic family, identical pinout and timing, but commercial-grade (–40°C to +85°C) and non-extended temperature qualified | Limited to commercial/industrial environments; lacks radiation-hardened screening and extended temp validation | Select when cost sensitivity outweighs extended temperature or enhanced reliability requirements |
| CD74AC273M96 | AC-family variant: wider 1.5V–5.5V supply range, slower 12.3ns typical tPLH, lower ±24mA drive, and reduced ESD rating (±1500V HBM) | Compatible with mixed-voltage systems (e.g., 3.3V logic domains); unsuitable for high-speed 97MHz operation | Choose for multi-supply designs needing voltage flexibility over speed or ruggedness |
Compared with SN74ACT273PWR, CD74ACT273MPWREP offers guaranteed operation to –55°C and +125°C with enhanced ESD robustness; compared with CD74AC273M96, it delivers faster timing, stronger drive, and superior noise immunity at fixed 5V operation.
Availability
CD74ACT273MPWREP is available at Aetrix Electronics and suitable for industrial automation, avionics subsystems, and motor control applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74ACT273MPWREP 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 high-reliability logic families.
The CD74ACT273MPWREP belongs to TI's military-qualified "MPWREP" (Enhanced Product) logic portfolio, engineered for mission-critical applications demanding extended temperature operation, rigorous screening, and long-term supply assurance.
FAQ
What is the maximum clock frequency supported by CD74ACT273MPWREP?
The CD74ACT273MPWREP supports a maximum clock frequency of 97MHz at VCC = 5V and TA = 25°C, with guaranteed minimum of 85MHz across the full –55°C to +125°C operating range. This is derived from its 3.5ns typical propagation delay and validated timing margins in the official datasheet's switching characteristics table.
Does CD74ACT273MPWREP support 3.3V operation?
No, CD74ACT273MPWREP does not support 3.3V operation. Its ACT-family specification mandates a minimum supply voltage of 4.5V. For 3.3V-compatible octal D flip-flops, consider AC-family variants like CD74AC273M96, which operate from 1.5V to 5.5V but with slower timing and reduced drive strength.
What is the function of pin 1 (!MR) on CD74ACT273MPWREP?
Pin 1 of CD74ACT273MPWREP is the active-low master reset (!MR) input. When asserted low, it asynchronously forces all eight Q outputs to logic low, independent of the clock signal. The minimum pulse width required is 4.4ns at VCC = 5V, and the input threshold is VIL ≤ 0.8V.
Is CD74ACT273MPWREP pin-compatible with standard 74ACT273 devices?
Yes, CD74ACT273MPWREP is pin-compatible with industry-standard 74ACT273 devices in TSSOP-20 (PW) packaging. It shares identical pin numbering, electrical characteristics, and timing behavior-but adds enhanced product qualifications including extended temperature range, tighter parametric limits, and controlled manufacturing lot traceability.
What package type is used for CD74ACT273MPWREP?
CD74ACT273MPWREP uses the TSSOP-20 (PW) package: 5.00 mm × 6.4 mm body size, 0.65 mm lead pitch, 2.0 mm maximum height, RoHS-compliant NIPDAU lead finish, and moisture sensitivity level (MSL) Level-1. This surface-mount package supports high-density PCB layouts and automated assembly.
CD74ACT273MPWREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 85 MHz
- Max Propagation Delay @ V, Max CL:
- 13.5ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- -
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
CD74ACT273MPWREP FAQ
1.How can I place an order for CD74ACT273MPWREP through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74ACT273MPWREP 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 CD74ACT273MPWREP reliable?
The price and inventory of CD74ACT273MPWREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74ACT273MPWREP is usually 5 days.
3.What payment methods are accepted for CD74ACT273MPWREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74ACT273MPWREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74ACT273MPWREP?
CD74ACT273MPWREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74ACT273MPWREP 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 CD74ACT273MPWREP?
For technical support, including CD74ACT273MPWREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74ACT273MPWREP requirements.
6.How does Aetrix verify that CD74ACT273MPWREP is sourced from the original manufacturer or authorized distributors?
All CD74ACT273MPWREP 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 CD74ACT273MPWREP meets industry standards.
7.What is the process for return or replacement of CD74ACT273MPWREP?
All CD74ACT273MPWREP units undergo pre-shipment inspection (PSI). If there is an issue with CD74ACT273MPWREP, 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 CD74ACT273MPWREP part is unused and in its original packaging.
Return procedure for CD74ACT273MPWREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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