My Inquiry
My Account
Nexperia USA Inc. 74HCT273BQ,115
- Part No.:
- 74HCT273BQ,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
74HCT273BQ,115.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,540
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74HCT273BQ,115 from Nexperia is an octal positive-edge-triggered D-type flip-flop with asynchronous master reset (MR), designed for synchronous data latching in digital logic systems. It operates from 4.5 V to 5.5 V, delivers 8-bit parallel output registration with 15 ns typical propagation delay (VCC = 4.5 V, CL = 50 pF), and supports industrial temperature range (–40 °C to +125 °C). It is used in microcontroller I/O expansion, address/data bus buffering, and state-holding circuits in industrial control modules.
For engineers reviewing the 74HCT273BQ,115 datasheet, 74HCT273BQ,115 pinout, 74HCT273BQ,115 application, or 74HCT273BQ,115 equivalent, this device is selected when TTL-compatible input thresholds, low-power CMOS operation, deterministic edge-triggered behavior, and compact thermal-enhanced packaging are required in space-constrained embedded logic designs.
Technical Context
The 74HCT273BQ,115 implements eight independent D-type flip-flops sharing a common clock (CP) and active-low master reset (MR). Each flip-flop captures the logic state of its Dn input on the LOW-to-HIGH transition of CP, provided setup (12 ns min at VCC = 4.5 V) and hold (3 ns min) timing requirements are met. MR overrides clock and data, forcing all Qn outputs LOW asynchronously.
Its TTL-level inputs (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5 V to 5.5 V) ensure compatibility with legacy 5 V logic families, while CMOS output stages deliver VOH ≥ 3.98 V (IO = –4.0 mA) and VOL ≤ 0.26 V (IO = 5.2 mA), enabling direct interfacing with downstream HC/HCT loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HCT - TTL-compatible input thresholds, CMOS output drive, 5 V supply optimized |
| Function | Octal D-type flip-flop with common clock and asynchronous master reset (active LOW) |
| Propagation Delay (tpd) | 16 ns typical (CP to Qn, VCC = 4.5 V, CL = 50 pF) - enables reliable 30 MHz operation |
| Supply Voltage Range | 4.5 V to 5.5 V - ensures robust operation across standard 5 V rail tolerances |
| Operating Temperature | –40 °C to +125 °C - qualified for extended industrial environments |
| Input Capacitance (CI) | 3.5 pF - minimizes loading on driving logic and preserves signal integrity |
| Power Dissipation Cap. (CPD) | 23 pF - used to calculate dynamic power: PD = CPD × VCC² × fi + Σ(CL × VCC² × fo) |
Pinout & Package
DHVQFN20 package (SOT764-1): 2.5 mm × 4.5 mm × 0.85 mm body, 20-terminal no-lead quad flat design with exposed thermal pad (non-soldered by default); optimized for high-density PCB layouts and improved thermal performance over SO20/TSSOP20.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | MR | Master reset input - active LOW; forces all Qn outputs LOW regardless of CP or Dn state |
| 2 | Q0 | Flip-flop 0 output - registered value of D0 sampled on rising CP edge |
| 3 | D0 | Data input 0 - sampled at CP rising edge if setup/hold times met |
| 4 | D3 | Data input 3 - one of eight parallel data inputs aligned to Q3–Q7 outputs |
| 5 | Q2 | Flip-flop 2 output - registered value of D2, synchronized to CP |
| 6 | Q5 | Flip-flop 5 output - provides deterministic timing-controlled output for bus management |
| 7 | D2 | Data input 2 - part of 8-bit parallel input group supporting byte-wide latching |
| 8 | D5 | Data input 5 - enables full octal data capture without external multiplexing |
| 9 | Q4 | Flip-flop 4 output - matches D4 state after CP edge, used in address latch applications |
| 10 | GND | Ground reference - 0 V return path for all internal circuitry and I/O |
| 11 | CP | Clock input - LOW-to-HIGH transition triggers simultaneous sampling of all Dn inputs |
| 12 | Q7 | Flip-flop 7 output - final bit of octal register, critical for complete data word retention |
| 13 | D4 | Data input 4 - central bit in 8-bit group, often used for status or control signal latching |
| 14 | D7 | Data input 7 - MSB input; paired with Q7 for full-byte interface to microcontrollers |
| 15 | Q6 | Flip-flop 6 output - supports dual-nibble or segmented bus control architectures |
| 16 | Q1 | Flip-flop 1 output - provides first registered bit after Q0, used in sequential I/O expansion |
| 17 | D1 | Data input 1 - second bit in octal chain, essential for coherent multi-bit sampling |
| 18 | D6 | Data input 6 - LSB-aligned input supporting bidirectional data flow control |
| 19 | Q3 | Flip-flop 3 output - middle-bit output used in address/data separation logic |
| 20 | VCC | Supply voltage - 4.5 V to 5.5 V input powering internal logic and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V - interoperates directly with 74LS/74F logic |
| Asynchronous master reset | MR forces all Qn LOW independently of CP timing - enables system-wide initialization without clock dependency |
| Low dynamic power | CPD = 23 pF - reduces switching power in high-frequency clocked applications vs. older 74LS273 |
| Industrial temperature grade | Specified from –40 °C to +125 °C - validated for use in motor drives, PLCs, and outdoor electronics |
| ESD robustness | HBM > 2000 V, CDM > 1000 V - withstands handling and board-level ESD events per JEDEC JS-001/JS-002 |
Applications
| Microcontroller I/O Expansion | Address Latching in 8-bit Systems |
|---|---|
|
Use Scenario: Expanding GPIO count of an 8-bit MCU (e.g., ATmega328P) to drive 8 LEDs, relays, or sensors without consuming core pins. IC Role / Device Role / Timing Role: Acts as an 8-bit output latch synchronized to MCU write strobe (mapped to CP), with MR tied to system reset. Use Value: Enables deterministic output update on single clock edge; eliminates bus contention during partial writes. |
Use Scenario: Capturing 8-bit address bus signals (A0–A7) from an 8051-based system to enable memory-mapped peripheral access. IC Role / Device Role / Timing Role: Serves as address latch - CP driven by ALE signal, MR held HIGH during normal operation. Use Value: Provides glitch-free address hold during memory read/write cycles; meets 12 ns setup requirement at 12 MHz bus speed. |
| Industrial Bus Interface Buffer | State Register for Control Logic |
|
Use Scenario: Isolating and synchronizing parallel control signals (e.g., enable, direction, fault flags) between FPGA and motor driver ICs. IC Role / Device Role / Timing Role: Functions as a level-shifting, edge-triggered buffer - accepts 3.3 V FPGA outputs via pull-up, drives 5 V driver inputs. Use Value: Eliminates metastability risk with 3 ns hold time margin; supports 24 MHz control loop rates. |
Use Scenario: Holding operational mode bits (e.g., RUN/STOP/FAULT) in a programmable logic controller's sequencer module. IC Role / Device Role / Timing Role: Stores persistent state across clock cycles - MR used for emergency stop override, CP driven by system timer. Use Value: Guarantees atomic state updates; prevents partial-bit corruption during power-up or reset 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 |
|---|---|---|---|
| 74HCT273PW,118 | TSSOP20 package (4.4 mm width); 10.0 mW/K thermal derating above 100 °C vs. 12.9 mW/K for BQ | Lower profile but reduced thermal performance; suitable where board height < 1.2 mm is mandatory | Select when footprint area allows TSSOP and thermal load is < 150 mW |
| SN74HCT273PWR | Texas Instruments variant; VIH = 2.0 V min, but ICC = 160 μA max (–40 °C to +125 °C) vs. Nexperia's 80 μA | Higher quiescent current impacts battery-powered or ultra-low-power systems | Prefer for TI-design ecosystems requiring identical pinout and qualification documentation |
Compared with 74HCT273PW,118 and SN74HCT273PWR, the 74HCT273BQ,115 offers superior thermal dissipation (12.9 mW/K derating), lower ICC (80 μA max), and smallest footprint (2.5 × 4.5 mm), making it optimal for thermally constrained, high-reliability industrial PCBs.
Availability
74HCT273BQ,115 is available at Aetrix Electronics and suitable for industrial control systems, programmable logic controllers, and embedded microcontroller peripherals requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT273BQ,115 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
Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for industrial and automotive markets.
The 74HCT273BQ,115 belongs to Nexperia's 74HCT logic family - engineered for TTL-compatible interfacing in 5 V systems where low power, precise timing, and extended temperature operation are critical.
FAQ
What is the minimum pulse width required on the MR pin to ensure reliable reset?
The MR pin requires a minimum LOW pulse width of 16 ns at VCC = 4.5 V to guarantee all outputs are forced LOW. This is specified under tW (pulse width) in the dynamic characteristics table. Shorter pulses may result in incomplete or metastable reset behavior, especially near temperature extremes.
Can the 74HCT273BQ,115 operate with a 3.3 V supply?
No. The 74HCT273BQ,115 is rated only for 4.5 V to 5.5 V operation. Its TTL-compatible inputs require VIH ≥ 2.0 V, but VCC must be within the recommended range to ensure proper output drive strength (VOH ≥ 3.98 V) and timing compliance. For 3.3 V systems, use the 74LVC273 or 74ALVC273 instead.
Is the exposed thermal pad on the DHVQFN20 package required to be soldered?
No. Per Nexperia's datasheet note, the thermal pad (terminal 1 index area) has no electrical or mechanical requirement to be soldered. If soldered, it must remain electrically floating or be connected to GND - never left as a floating copper island to avoid parasitic coupling or solder voiding risks.
How does the 74HCT273BQ,115 handle input signals that violate setup or hold time?
Violating setup (tsu = 12 ns min) or hold (th = 3 ns min) times on Dn inputs relative to CP can cause metastability, resulting in unpredictable Qn output states or extended settling time. The device does not include built-in metastability hardening; external synchronization logic or slower clocking must be used in asynchronous interfaces.
74HCT273BQ,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 20-VFQFN Exposed Pad
- 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:
- 36 MHz
- Max Propagation Delay @ V, Max CL:
- 30ns @ 4.5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 4mA, 5.2mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-DHVQFN (4.5x2.5)
74HCT273BQ,115 FAQ
1.How can I place an order for 74HCT273BQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT273BQ,115 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 74HCT273BQ,115 reliable?
The price and inventory of 74HCT273BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT273BQ,115 is usually 5 days.
3.What payment methods are accepted for 74HCT273BQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT273BQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT273BQ,115?
74HCT273BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT273BQ,115 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 74HCT273BQ,115?
For technical support, including 74HCT273BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT273BQ,115 requirements.
6.How does Aetrix verify that 74HCT273BQ,115 is sourced from the original manufacturer or authorized distributors?
All 74HCT273BQ,115 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 74HCT273BQ,115 meets industry standards.
7.What is the process for return or replacement of 74HCT273BQ,115?
All 74HCT273BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT273BQ,115, 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 74HCT273BQ,115 part is unused and in its original packaging.
Return procedure for 74HCT273BQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT273BQ,115 Tags
-
SN74HC74DR
Texas Instruments
-
SN74HC74PWR
Texas Instruments
-
74LVC1G74GT,115
Nexperia USA Inc.
-
SN74LVC2G74DCUR
Texas Instruments
-
CD4013BM96
Texas Instruments
-
SN74HCT273PWR
Texas Instruments
-
SN74LVC1G74DCUR
Texas Instruments
-
SN74HC574DWR
Texas Instruments
-
74LVC1G74DC,125
Nexperia USA Inc.
-
SN74HC273DWR
Texas Instruments
-
SN74HCT574DWR
Texas Instruments
-
SN74LVC1G74DCTR
Texas Instruments
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
