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Nexperia USA Inc. 74AHCT273PW,112
- Part No.:
- 74AHCT273PW,112
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74AHCT273PW,112.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,467
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Product details
Overview
74AHCT273PW,112 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, features TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V), delivers propagation delay as low as 4.0 ns (CL = 15 pF, VCC = 5 V), and supports industrial temperature range (–40 °C to +125 °C). It is used in microcontroller I/O expansion, address/data bus registration, and clock-synchronized control logic.
For engineers reviewing the 74AHCT273PW,112 datasheet, 74AHCT273PW,112 pinout, 74AHCT273PW,112 application, or 74AHCT273PW,112 equivalent, key selection criteria include its TTL-level input compatibility, 20-pin TSSOP package with 0.65 mm pitch, guaranteed 100 MHz maximum frequency at 5 V/15 pF, and robust 2 kV HBM ESD protection - critical for mixed-voltage interface and noise-immune digital control designs.
Technical Context
The 74AHCT273PW,112 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 transition of CP, provided setup (tsu = 3.0 ns) and hold (th = 1.0 ns) times are met. MR overrides clock and data, forcing all Qn outputs LOW regardless of CP state.
Its TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) enable direct interfacing with legacy 5 V TTL logic families, while CMOS output drive (VOH ≥ 3.94 V at IO = –8 mA, VOL ≤ 0.36 V at IO = 8 mA) ensures reliable fanout to downstream AHC/AHCT loads. Input Schmitt-trigger action is not present - inputs are standard TTL-compliant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | AHCT - TTL-compatible inputs, CMOS outputs; enables direct replacement of 74LS273 in 5 V systems without level-shifting. |
| Supply Voltage Range | 4.5 V to 5.5 V - ensures stable operation across ±5 % tolerance of nominal 5 V rail; not rated below 4.5 V. |
| Propagation Delay (tpd) | 4.0 ns (min), 7.5 ns (max) at VCC = 5 V, CL = 15 pF - supports high-speed bus registration up to 100 MHz. |
| Input Thresholds | VIH = 2.0 V (min), VIL = 0.8 V (max) - guarantees interoperability with 74LS, 74F, and other TTL-family drivers. |
| Output Drive | ±8 mA (IOH/ IOL) - sufficient to drive 10 LSTTL loads or 20 AHC/AHCT inputs under worst-case conditions. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - meets JEDEC JS-001/JS-002 Class 2/C3, suitable for board-level handling without special precautions. |
| Operating Temperature | –40 °C to +125 °C - qualified for extended industrial and under-hood automotive auxiliary applications (non-AEC-Q100). |
Pinout & Package
TSSOP20 plastic thin shrink small outline package (SOT360-1); 20 leads; body width 4.4 mm; 0.65 mm lead pitch; exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Master Reset input | Asynchronous active-LOW signal; forces all Qn outputs LOW independently of clock edge or data state. |
| 2 (VCC) | Positive supply | Primary 4.5–5.5 V power connection; decoupling capacitor must be placed adjacent to this pin. |
| 3–4, 7–8, 13–14, 17–18 (D0–D7) | Data inputs | Eight parallel asynchronous data inputs; sampled on rising edge of CP if setup/hold timing is satisfied. |
| 5, 6, 9, 12, 15, 16, 19 (Q0–Q7) | Flip-flop outputs | Eight registered outputs; retain state between clock edges; driven full-rail (0 V to VCC) with ±8 mA capability. |
| 10 (GND) | Ground reference | 0 V return path for supply and signals; must be low-impedance and tied to system ground plane. |
| 11 (CP) | Clock input | LOW-to-HIGH edge-triggered; minimum pulse width 5.0 ns; Schmitt-trigger action not present. |
| 20 (VCC) | Positive supply (duplicate) | Second VCC connection for improved power distribution; must be tied to same 4.5–5.5 V rail as Pin 2. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input levels | Enables plug-in replacement of 74LS273 in legacy 5 V systems without redesigning input drive circuitry. |
| Common clock and master reset | Single CP and MR lines simplify PCB routing and reduce control logic overhead in multi-bit register applications. |
| High noise immunity | Guaranteed 0.4 V noise margin at VCC = 5 V (VIH – VIL = 1.2 V), reducing susceptibility to crosstalk and ground bounce. |
| Low static power consumption | ICC ≤ 4.0 μA typical at VCC = 5.5 V, enabling use in always-on logic sections with minimal quiescent load. |
| Overvoltage tolerant inputs | Inputs withstand up to 5.5 V regardless of VCC level - allows safe interfacing with higher-voltage peripherals during power sequencing. |
Applications
| Microcontroller I/O Expansion | Address Bus Latching |
|---|---|
|
Use Scenario: Expanding GPIO count of an ARM Cortex-M0+ MCU by adding parallel output latches for LED arrays and relay drivers. IC Role / Device Role / Timing Role: Synchronizes 8-bit parallel data from MCU's GPIO port to external loads on each rising clock edge, isolating timing-critical peripherals from software latency. Use Value: Enables deterministic, jitter-free output updates aligned to system clock domain - eliminating race conditions in real-time control loops. |
Use Scenario: Capturing 8-bit segments of a 16-bit address bus in an 8051-based embedded controller to drive external memory or peripheral ICs. IC Role / Device Role / Timing Role: Registers lower/upper address byte on rising edge of ALE-equivalent clock, holding stable address during memory access cycles. Use Value: Provides clean, glitch-free address strobing with <7.5 ns propagation delay - ensuring reliable setup time for SRAM or EPROM access. |
| Industrial PLC Input Conditioning | Digital Control Signal Synchronization |
|
Use Scenario: Debouncing and synchronizing 8 discrete 24 V DC sensor inputs (limit switches, proximity sensors) into a safety-rated PLC backplane. IC Role / Device Role / Timing Role: Samples isolated, optocoupled inputs on system clock edge and holds state until next scan cycle; MR resets all channels on fault detection. Use Value: Eliminates metastability risk via two-stage synchronization (external RC + internal FF), meeting IEC 61000-4-4 surge immunity requirements. |
Use Scenario: Aligning asynchronous control signals (e.g., emergency stop, mode select) from panel-mounted hardware to a synchronized FPGA control fabric. IC Role / Device Role / Timing Role: Acts as a synchronous register bank, transferring user inputs into the FPGA's clock domain using a dedicated 50 MHz system clock. Use Value: Prevents setup/hold violations in FPGA logic with guaranteed tsu/th of 3.0 ns / 1.0 ns - critical for deterministic state machine transitions. |
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 |
|---|---|---|---|
| 74AHC273PW,112 | CMOS input thresholds (VIH = 3.85 V @ VCC = 5.5 V); wider 2.0–5.5 V supply range; slightly higher tpd (4.2 ns min). | Requires 3.3 V or 5 V CMOS-compatible drivers; unsuitable for direct 74LS interface without level translation. | Select when operating from 3.3 V or mixed-supply systems; preferred for ultra-low ICC (<1 μA) and wide-VCC flexibility. |
| SN74ACT273PWR | TTL-compatible inputs like AHCT; 4.5–5.5 V range; tpd = 6.5 ns (max) at 5 V/50 pF; higher ICC (20 μA typ). | Pinout identical to 74AHCT273 but different manufacturer; requires TI-specific layout guidelines for thermal management. | Select when sourcing from TI-authorized channels; verify compatibility with existing 74AHCT273PCB footprints (TSSOP-20 same pitch). |
Compared with 74AHC273PW,112 and SN74ACT273PWR, the 74AHCT273PW,112 uniquely balances TTL interoperability, sub-5 ns speed, and <4 μA quiescent current - making it optimal for cost-sensitive, noise-prone 5 V industrial control where legacy logic integration is required.
Availability
74AHCT273PW,112 is available at Aetrix Electronics and suitable for microcontroller I/O expansion, address bus latching, and industrial PLC input conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74AHCT273PW,112 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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions - spun off from NXP in 2017 and headquartered in Nijmegen, Netherlands.
The 74AHCT273PW,112 belongs to Nexperia's industry-standard 74-series logic portfolio, engineered for drop-in compatibility with legacy TTL and LS families while delivering CMOS efficiency and robustness in industrial and consumer applications.
FAQ
Is the 74AHCT273PW,112 pin-compatible with the 74LS273?
Yes - the 74AHCT273PW,112 uses identical pinout (SO20/TSSOP20/DHVQFN20) and functional mapping as the 74LS273, including MR, CP, D0–D7, and Q0–Q7 assignments. Its TTL-compatible inputs and 5 V operation allow direct substitution without PCB changes, though decoupling and layout best practices for CMOS should be followed.
What is the minimum clock pulse width for reliable operation?
The minimum HIGH and LOW pulse width for CP is 5.0 ns at VCC = 4.5–5.5 V, per Table 7. This ensures proper triggering of the internal edge detector. Pulse widths below this value risk metastability or missed clock edges, especially under temperature extremes or voltage droop.
Can the 74AHCT273PW,112 operate at 3.3 V?
No - the 74AHCT273 variant is specified only for 4.5–5.5 V supply. For 3.3 V operation, use the 74AHC273PW,112 instead, which has CMOS input thresholds and 2.0–5.5 V range. Attempting 3.3 V on AHCT may result in VIH violation and unreliable logic recognition.
Does the MR (master reset) pin require a pull-up resistor?
Yes - MR is active LOW and internally unconnected. In absence of an asserted reset signal, a 10 kΩ pull-up to VCC is recommended to prevent floating input, which could cause unintended output clearing due to noise or leakage currents.
74AHCT273PW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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:
- 75 MHz
- Max Propagation Delay @ V, Max CL:
- 9.2ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 4 µA
- Input Capacitance:
- 3 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74AHCT273PW,112 FAQ
1.How can I place an order for 74AHCT273PW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT273PW,112 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 74AHCT273PW,112 reliable?
The price and inventory of 74AHCT273PW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT273PW,112 is usually 5 days.
3.What payment methods are accepted for 74AHCT273PW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT273PW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT273PW,112?
74AHCT273PW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT273PW,112 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 74AHCT273PW,112?
For technical support, including 74AHCT273PW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT273PW,112 requirements.
6.How does Aetrix verify that 74AHCT273PW,112 is sourced from the original manufacturer or authorized distributors?
All 74AHCT273PW,112 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 74AHCT273PW,112 meets industry standards.
7.What is the process for return or replacement of 74AHCT273PW,112?
All 74AHCT273PW,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT273PW,112, 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 74AHCT273PW,112 part is unused and in its original packaging.
Return procedure for 74AHCT273PW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74AHCT273PW,112 Tags
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