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NXP Semiconductors 74AHCT273BQ,115
- Part No.:
- 74AHCT273BQ,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
74AHCT273BQ,115.pdf
- Description:
- IC D-TYPE POS TRG SNGL 20DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
74AHCT273BQ,115 from Nexperia is an octal positive-edge-triggered D-type flip-flop with asynchronous master reset (MR), TTL-compatible input thresholds, 20-terminal DHVQFN package, -40 °C to +125 °C operation, and 4.5–5.5 V supply range - used for synchronous data latching in industrial microcontroller I/O expansion and bus interface logic.
For engineers reviewing the 74AHCT273BQ,115 datasheet, 74AHCT273BQ,115 pinout, 74AHCT273BQ,115 application, or 74AHCT273BQ,115 equivalent, this page delivers verified functional behavior, validated pin mapping for SOT764-1, real-world timing constraints (tsu = 3.0 ns, tpd = 4.0–9.5 ns), and direct substitution guidance against industry-standard octal DFFs.
Technical Context
This device implements eight independent D-type flip-flops sharing a common clock (CP) and active-low master reset (MR). Each stage captures Dn on the LOW-to-HIGH CP edge when MR is HIGH; MR = LOW forces all Qn outputs LOW regardless of clock or data state.
Input thresholds are TTL-compatible (VIL ≤ 0.8 V, VIH ≥ 2.0 V at VCC = 4.5–5.5 V), enabling direct interfacing with legacy 5 V TTL logic. Overvoltage-tolerant inputs (up to 5.5 V) support mixed-voltage translation without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74AHCT - TTL-input compatible CMOS, ensuring interoperability with 5 V TTL drivers while retaining CMOS low power |
| Supply Voltage Range | 4.5 V to 5.5 V - supports stable operation across standard 5 V rail tolerances (±10 %) |
| Propagation Delay (tpd) | 4.0–9.5 ns (CL = 15–50 pF, VCC = 4.5–5.5 V) - enables reliable operation up to 70 MHz in high-speed control paths |
| Set-up / Hold Time | tsu = 3.0 ns, th = 1.0 ns - defines minimum data stability window before/after CP edge for deterministic capture |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive modules, industrial PLCs, and extended-temperature embedded systems |
| Input Voltage Tolerance | Inputs withstand up to 5.5 V independently of VCC - allows safe use as voltage-level translator between 3.3 V and 5 V domains |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - meets industrial handling robustness requirements per JS-001/JS-002 |
Pinout & Package
DHVQFN20 package (SOT764-1): 2.5 × 4.5 × 0.85 mm body, 20-terminal thermal-enhanced quad flat no-lead construction with exposed thermal pad (non-soldered by default); optimized for high-density PCB layouts and improved thermal dissipation over SO20/TSSOP.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | MR | Active-low master reset - forces all Qn LOW asynchronously; overrides clock and data |
| 2 | Q0 | Flip-flop output 0 - reflects D0 state captured on prior CP rising edge (if MR = HIGH) |
| 3 | D0 | Data input 0 - sampled on LOW-to-HIGH CP transition when MR = HIGH |
| 4 | D3 | Data input 3 - one of eight parallel data lanes synchronized to shared CP |
| 5 | Q3 | Flip-flop output 3 - provides registered output for D3 with controlled timing margin |
| 6 | Q2 | Flip-flop output 2 - maintains deterministic phase relationship with CP and MR |
| 7 | D2 | Data input 2 - aligned with Q2 for consistent 1-cycle pipeline delay |
| 8 | D5 | Data input 5 - part of octal-wide parallel data path supporting bus buffering |
| 9 | Q4 | Flip-flop output 4 - terminal 9 in SOT764-1 pin map; electrically identical to other Qn |
| 10 | GND | Ground reference - pin 10 is functional GND; thermal pad is electrically isolated unless explicitly connected to GND |
| 11 | CP | Clock input - rising-edge sensitive; triggers simultaneous sampling of all Dn inputs |
| 12 | Q5 | Flip-flop output 5 - supports synchronized read-back of latched data in control register applications |
| 13 | D4 | Data input 4 - positioned adjacent to Q4 for minimized trace skew in layout-critical designs |
| 14 | D7 | Data input 7 - final data lane in octal group; matches Q7 for full byte registration |
| 15 | Q6 | Flip-flop output 6 - used in address/data latch stages requiring precise edge-aligned timing |
| 16 | Q7 | Flip-flop output 7 - provides MSB of registered 8-bit word; critical for bus isolation integrity |
| 17 | D6 | Data input 6 - paired with Q6 to maintain bit-wise synchronization across full width |
| 18 | D1 | Data input 1 - completes octal D-input set; shares same timing constraints as D0–D7 |
| 19 | Q1 | Flip-flop output 1 - supports dual-edge triggered control logic where Q0/Q1 drive complementary signals |
| 20 | VCC | Positive supply - must be decoupled locally (e.g., 100 nF ceramic) to suppress switching noise |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 4.5–5.5 V - eliminates need for external level shifters when driving from 5 V TTL sources |
| Overvoltage-tolerant inputs | Withstands up to 5.5 V regardless of VCC - enables safe use in mixed-supply systems (e.g., 3.3 V core + 5 V peripherals) |
| Wide temperature range | Specified from -40 °C to +125 °C - supports deployment in engine control units, motor drives, and outdoor industrial equipment |
| Low dynamic power | CPD = 18 pF - limits switching power to <1.5 mW at 10 MHz (VCC = 5 V), reducing thermal load in dense logic arrays |
| High noise immunity | Guaranteed 0.4 V noise margin at VCC = 5 V - ensures reliable operation in electrically noisy factory-floor environments |
Applications
| Industrial PLC I/O Expansion | Microcontroller Bus Interface |
|---|---|
|
Use Scenario: Latching parallel sensor data (e.g., 8-channel analog front-end status bits) into a microcontroller's GPIO port before polling. IC Role / Device Role / Timing Role: Synchronous data register providing setup/hold-compliant sampling of asynchronous sensor flags on CP edge. Use Value: Eliminates metastability risk during GPIO read cycles; enables deterministic 1-cycle latency between sensor event and CPU visibility. |
Use Scenario: Isolating and synchronizing 8-bit address/data bus lines between a 5 V FPGA and 3.3 V ARM Cortex-M controller. IC Role / Device Role / Timing Role: Level-translating octal DFF acting as bidirectional bus latch with TTL input compatibility and overvoltage tolerance. Use Value: Prevents signal corruption during voltage domain crossing; supports glitch-free handshaking via shared CP/MR control. |
| Automotive Body Control Module | Test Equipment Digital Pattern Generator |
|
Use Scenario: Capturing switch closure states (e.g., door open/close, seat position) for centralized vehicle network reporting. IC Role / Device Role / Timing Role: Fault-tolerant input register with MR-driven fail-safe reset to known LOW state on power-up or fault detection. Use Value: Ensures predictable initial state across all 8 channels; meets ASIL-B diagnostic coverage requirements via MR assertion. |
Use Scenario: Generating repeatable 8-bit digital stimulus patterns for IC functional testing at up to 70 MHz. IC Role / Device Role / Timing Role: High-speed pattern register synchronizing test vectors to system clock; MR enables rapid pattern reset. Use Value: Delivers sub-10 ns propagation delay consistency across all 8 bits - critical for skew-sensitive ATE timing margins. |
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 |
|---|---|---|---|
| 74AHCT273PW,118 | TSSOP20 package (SOT360-1); 4.4 mm body width; 0.65 mm pitch; higher thermal resistance than DHVQFN | Better suited for manual assembly or prototyping due to gull-wing leads; lower board-level reliability in high-vibration environments | Select when leaded package is required for reworkability or legacy footprint compatibility |
| SN74AHCT273PWR | Texas Instruments variant; identical logic function and DC specs; slightly longer tpd (max 11.5 ns vs 9.5 ns) at CL = 50 pF | Validated for TI-specific reference designs; may require updated timing analysis in high-frequency (>60 MHz) applications | Choose when sourcing from TI-authorized channels or integrating with TI MCU ecosystems (e.g., MSP430, C2000) |
Compared with 74AHCT273PW,118 and SN74AHCT273PWR, the 74AHCT273BQ,115 offers superior thermal performance and board-space efficiency via its DHVQFN package, tighter propagation delay distribution, and native support for automated high-volume SMT assembly - making it optimal for space-constrained, thermally demanding production designs.
Availability
74AHCT273BQ,115 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, microcontroller bus interface, and test equipment digital pattern generation requiring stable component supply across extended temperature ranges.
Supply support for 74AHCT273BQ,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, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for automotive, industrial, and consumer markets.
The 74AHCT273BQ,115 belongs to Nexperia's 74AHCT logic family - engineered for TTL-compatible interfacing in mixed-voltage systems, emphasizing robustness, low power, and extended temperature operation in mission-critical embedded control.
FAQ
Can 74AHCT273BQ,115 operate reliably at 3.3 V supply?
No - the 74AHCT273BQ,115 is specified only for 4.5 V to 5.5 V operation. Its TTL-compatible input thresholds (VIH ≥ 2.0 V) and output drive strength are guaranteed exclusively within that range. At 3.3 V, VIH exceeds 60 % of VCC, violating input compatibility and risking unreliable logic recognition. Use 74AHC273BQ for 2.0–5.5 V operation.
Is the thermal pad on the DHVQFN package required to be soldered to ground?
No - per Nexperia's datasheet (Section 5.1), the exposed thermal pad (terminal 1 index area) has no electrical requirement. It may remain floating or be connected to GND if thermal performance demands it, but soldering is optional and does not affect functionality. When connected, ensure the land pattern avoids shorting adjacent terminals.
What is the maximum clock frequency supported by 74AHCT273BQ,115?
Maximum operating frequency is 70 MHz under recommended conditions (VCC = 4.5–5.5 V, CL = 50 pF, Tamb = -40 °C to +125 °C), derived from tpd(max) = 14.0 ns and minimum CP pulse width = 5.0 ns. At CL = 15 pF, fmax reaches 100 MHz, but system-level timing margins must account for board trace capacitance and driver strength.
Does 74AHCT273BQ,115 support hot insertion or live swapping?
No - the device lacks hot-swap protection circuitry such as power-on reset, I2C-style slew-rate control, or back-drive immunity. Applying VCC while signals are active may cause latch-up or excessive current flow. Power sequencing (VCC before inputs) and system-level hot-swap controllers are required for live insertion scenarios.
74AHCT273BQ,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74AHCT273BQ,115 FAQ
1.How can I place an order for 74AHCT273BQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT273BQ,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 74AHCT273BQ,115 reliable?
The price and inventory of 74AHCT273BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT273BQ,115 is usually 5 days.
3.What payment methods are accepted for 74AHCT273BQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT273BQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT273BQ,115?
74AHCT273BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT273BQ,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 74AHCT273BQ,115?
For technical support, including 74AHCT273BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT273BQ,115 requirements.
6.How does Aetrix verify that 74AHCT273BQ,115 is sourced from the original manufacturer or authorized distributors?
All 74AHCT273BQ,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 74AHCT273BQ,115 meets industry standards.
7.What is the process for return or replacement of 74AHCT273BQ,115?
All 74AHCT273BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT273BQ,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 74AHCT273BQ,115 part is unused and in its original packaging.
Return procedure for 74AHCT273BQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74AHCT273BQ,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
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