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Nexperia USA Inc. 74AHCT273D,118
- Part No.:
- 74AHCT273D,118
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74AHCT273D,118.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,980
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Product details
Overview
74AHCT273D,118 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 propagation delays as low as 4.0 ns (CL = 15 pF), supports TTL-level inputs, and functions reliably across –40 °C to +125 °C - used in industrial control I/O expansion and microcontroller peripheral buffering.
For engineers reviewing the 74AHCT273D,118 datasheet, 74AHCT273D,118 pinout, 74AHCT273D,118 application, or 74AHCT273D,118 equivalent, this device is selected for its guaranteed TTL-compatible input thresholds, robust 125 °C operation, precise set-up/hold timing (3.0 ns / 1.0 ns), and SO20 package compatibility with legacy PCB footprints.
Technical Context
The 74AHCT273D,118 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 transition, provided data meets 3.0 ns set-up and 1.0 ns hold time requirements. MR overrides clock and data, forcing all Qn outputs LOW immediately.
Its TTL-input compatibility (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) enables direct interfacing with legacy 5 V TTL logic families, while CMOS output drive (±8 mA) ensures clean signal integrity into 15–50 pF loads. The device exhibits balanced tPLH/tPHL propagation delays and includes Schmitt-trigger action on all inputs for noise immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74AHCT - TTL-compatible input levels with CMOS output drive |
| Supply Voltage Range | 4.5 V to 5.5 V - Ensures interoperability with standard 5 V systems |
| Propagation Delay (tpd) | 4.0 ns (min), 9.5 ns (max) at VCC = 5 V, CL = 15 pF - Enables >100 MHz operation in buffered clock domains |
| Set-up / Hold Time | 3.0 ns / 1.0 ns - Defines minimum data stability window before/after CP edge for reliable capture |
| Operating Temperature | –40 °C to +125 °C - Qualified for under-hood industrial and extended-temperature embedded applications |
| Input Thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - Guarantees unambiguous recognition of TTL logic levels |
| Output Drive | ±8 mA - Sufficient to drive multiple 74-series inputs or moderate capacitive loads without external buffers |
Pinout & Package
74AHCT273D,118 is supplied in a plastic small outline package (SO20, SOT163-1) with 20 leads and 7.5 mm body width. Pin 1 is MR (master reset, active LOW); pins 2–19 carry Dn/Qn signals and CP; pin 10 is GND; pin 20 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Master reset input | Asynchronous active-LOW signal that forces all Qn outputs LOW regardless of CP or Dn state |
| 2,5,6,9,12,15,16,19 (Q0–Q7) | Flip-flop outputs | Registered outputs reflecting Dn state captured on prior CP rising edge |
| 3,4,7,8,13,14,17,18 (D0–D7) | Data inputs | Asynchronous inputs sampled only on CP rising edge if set-up/hold times met |
| 10 (GND) | Ground reference | 0 V return path for all internal circuitry and output current sinks |
| 11 (CP) | Clock input | Positive-edge-triggered control signal synchronizing all eight flip-flops simultaneously |
| 20 (VCC) | Supply voltage | Primary power rail (4.5–5.5 V) powering logic core and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH = 2.0 V min, VIL = 0.8 V max - Eliminates level-shifting when interfacing with legacy 5 V TTL microcontrollers |
| High-temperature operation | Rated from –40 °C to +125 °C - Supports deployment in motor drives, power supplies, and industrial PLC modules |
| Low dynamic power | CPD = 18 pF - Limits switching power dissipation in high-frequency clock distribution networks |
| Overvoltage-tolerant inputs | Withstands up to 5.5 V regardless of VCC - Prevents damage during hot-plug or mixed-voltage board bring-up |
| Schmitt-trigger inputs | Hysteresis on all inputs - Rejects noise spikes up to ~0.4 V on CP and MR lines in electrically noisy environments |
Applications
| Industrial I/O Expansion | Microcontroller Peripheral Buffering |
|---|---|
Use Scenario: Adding parallel digital output capability to a PLC main controller using discrete 74-series logic. IC Role / Device Role / Timing Role: Latches 8-bit command data from MCU bus onto isolated output lines synchronized to system clock. Use Value: Provides deterministic timing margin (3 ns set-up) and 125 °C operation required for cabinet-mounted control modules. | Use Scenario: Isolating and synchronizing GPIO signals between a 3.3 V ARM Cortex-M MCU and 5 V sensor interface circuitry. IC Role / Device Role / Timing Role: Acts as a level-translating, edge-aligned register to prevent metastability and ensure clean signal handoff. Use Value: TTL input thresholds accept 3.3 V logic highs directly; CMOS outputs drive 5 V loads without external pull-ups. |
| Digital Test Equipment Pattern Generation | Legacy System Data Capture |
Use Scenario: Generating repeatable 8-bit stimulus patterns in automated test fixtures for ASIC validation. IC Role / Device Role / Timing Role: Stores and releases preloaded test vectors on each clock edge under software-controlled MR reset. Use Value: Sub-10 ns propagation delay and tight timing specs enable precise pattern alignment at 100+ MHz rates. | Use Scenario: Capturing status bits from electromechanical relay banks in aging factory automation panels. IC Role / Device Role / Timing Role: Synchronizes asynchronous mechanical contact closures to a central scan clock for deterministic polling. Use Value: Schmitt-trigger inputs suppress bounce-induced glitches; MR allows global reset after fault detection. |
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 |
|---|---|---|---|
| 74AHC273D,118 | CMOS input thresholds (VIH = 3.85 V @ VCC = 5.5 V); wider 2.0–5.5 V supply range | Better suited for mixed-voltage systems where inputs may exceed 2.0 V; lower static current at 3.3 V | Select when interfacing with 3.3 V logic or requiring ultra-low ICC (< 4 μA typical) |
| SN74ACT273N | TI part with identical pinout and function; VIH = 2.0 V, VIL = 0.8 V; rated –40 °C to +85 °C only | Limited to commercial/industrial ambient ranges; not qualified for 125 °C operation | Choose only if full temperature range is unnecessary and TI sourcing preference applies |
Compared with 74AHC273D,118 and SN74ACT273N, the 74AHCT273D,118 uniquely combines TTL input compatibility, 125 °C qualification, and SO20 footprint - making it the sole option for high-reliability 5 V systems requiring guaranteed operation beyond 85 °C.
Availability
74AHCT273D,118 is available at Aetrix Electronics and suitable for industrial control I/O expansion, microcontroller peripheral buffering, digital test equipment pattern generation, and legacy system data capture requiring stable component supply across extended temperature ranges.
Supply support for 74AHCT273D,118 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 leading semiconductor manufacturer specializing in high-performance logic, analog, and discrete components, with global R&D and manufacturing infrastructure focused on reliability and efficiency.
The 74AHCT273D,118 belongs to Nexperia's 74AHCT logic family, engineered specifically for seamless integration between legacy TTL systems and modern CMOS-based controllers - emphasizing robustness, wide temperature operation, and pin-for-pin compatibility.
FAQ
What is the maximum clock frequency supported by the 74AHCT273D,118?
The 74AHCT273D,118 supports a maximum clock frequency of 120 MHz at VCC = 5.0 V and CL = 15 pF, and 70 MHz at CL = 50 pF over the full –40 °C to +125 °C range. These values derive from measured propagation delays (tpd ≤ 9.5 ns) and pulse width requirements (tW ≥ 5.0 ns), ensuring reliable edge-triggered operation in high-speed synchronous designs.
Can the 74AHCT273D,118 be used with a 3.3 V supply?
No - the 74AHCT273D,118 is specified only for 4.5 V to 5.5 V operation. Its TTL-input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) are optimized for 5 V systems; applying 3.3 V violates recommended operating conditions and risks unreliable logic recognition. For 3.3 V use, select the 74AHC273D,118 variant instead.
How does the master reset (MR) interact with the clock input?
The MR input is asynchronous and dominant: when pulled LOW, it forces all Qn outputs LOW immediately, overriding any ongoing clock activity or data input state. MR requires no clock edge to take effect, and its deassertion (return to HIGH) does not trigger output changes - outputs remain latched until the next valid CP rising edge.
Is the SO20 package of the 74AHCT273D,118 RoHS compliant and lead-free?
Yes - the 74AHCT273D,118 in SO20 (SOT163-1) packaging is manufactured per RoHS Directive 2011/65/EU and is lead-free. Nexperia confirms compliance via material declarations and testing reports; the device carries the "Pb-free" marking on the package and is listed in their official RoHS-compliant product database.
74AHCT273D,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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:
- 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-SO
74AHCT273D,118 FAQ
1.How can I place an order for 74AHCT273D,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT273D,118 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 74AHCT273D,118 reliable?
The price and inventory of 74AHCT273D,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT273D,118 is usually 5 days.
3.What payment methods are accepted for 74AHCT273D,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT273D,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT273D,118?
74AHCT273D,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT273D,118 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 74AHCT273D,118?
For technical support, including 74AHCT273D,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT273D,118 requirements.
6.How does Aetrix verify that 74AHCT273D,118 is sourced from the original manufacturer or authorized distributors?
All 74AHCT273D,118 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 74AHCT273D,118 meets industry standards.
7.What is the process for return or replacement of 74AHCT273D,118?
All 74AHCT273D,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT273D,118, 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 74AHCT273D,118 part is unused and in its original packaging.
Return procedure for 74AHCT273D,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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