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NXP Semiconductors 74HC273N,652
- Part No.:
- 74HC273N,652
- Manufacturer:
- NXP Semiconductors
- Category:
- Flip Flops
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
74HC273N,652.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,573
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Product details
Overview
74HC273N,652 from Nexperia is an octal positive-edge-triggered D-type flip-flop with asynchronous master reset (MR), operating across 2.0 V to 6.0 V supply, featuring 8 independent data inputs (D0–D7), 8 complementary outputs (Q0–Q7), and propagation delay as low as 13 ns at 6.0 V - used for synchronous data latching in digital control logic, bus interface buffering, and state register storage in industrial PLC modules.
For engineers reviewing the 74HC273N,652 datasheet, 74HC273N,652 pinout, 74HC273N,652 application, or 74HC273N,652 equivalent, key selection criteria include CMOS-level input compatibility, -40 °C to +125 °C temperature rating, SO20 package mechanical footprint, and precise set-up/hold timing (tsu = 13 ns, th = 3 ns at VCC = 6.0 V) for reliable high-speed clock domain synchronization.
Technical Context
This device implements eight identical edge-triggered D 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 and hold time requirements are met. MR overrides clock and data, forcing all Qn outputs LOW independently.
Input clamp diodes enable safe interfacing to voltages exceeding VCC when current-limiting resistors are used. The design complies with JEDEC JESD7A (2.0 V–6.0 V) and JESD8C (2.7 V–3.6 V), supports HBM ESD >2000 V and CDM >1000 V, and meets latch-up immunity >100 mA per JESD78 Class II Level B.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 2.0 V to 6.0 V - enables direct integration into 3.3 V and 5 V logic systems without level translation. |
| Propagation delay (tpd) | 13 ns (max) at VCC = 6.0 V - supports clock frequencies up to 24 MHz in worst-case industrial conditions. |
| Set-up time (tsu) | 13 ns (max) at VCC = 6.0 V - defines minimum data stability window before clock edge for reliable capture. |
| Hold time (th) | 3 ns (min) - specifies minimum data persistence after clock edge to prevent metastability. |
| Output drive strength | ±25 mA - sufficient to directly drive multiple 74-series TTL/CMOS inputs or small LED indicators. |
| Operating temperature | -40 °C to +125 °C - qualified for under-hood automotive control modules and industrial motor drives. |
| Input logic type | CMOS-level compatible - VIH = 4.2 V, VIL = 1.8 V at VCC = 6.0 V - ensures noise margin >1.2 V in 5 V systems. |
Pinout & Package
74HC273N,652 is supplied in the SO20 (SOT163-1) plastic small outline package: 20-pin, 7.5 mm body width, 1.27 mm pitch, gull-wing leads, RoHS-compliant, rated for -40 °C to +125 °C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Master reset input | Active-LOW asynchronous reset - forces all Q0–Q7 LOW regardless of CP or Dn states. |
| 2–9, 12–19 (Q0–Q7, D0–D7) | Output / Input pairs | Eight independent D/Q channels - D0→Q0, D1→Q1, ..., D7→Q7; no internal cross-coupling. |
| 10 (GND) | Ground reference | 0 V return path for all internal logic and I/O; must be low-impedance for noise immunity. |
| 11 (CP) | Clock input | Edge-sensitive trigger - only LOW-to-HIGH transitions affect output state; immune to glitches on falling edge. |
| 20 (VCC) | Power supply | Primary CMOS rail - decoupling capacitor (100 nF) required within 10 mm of pin for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (2.0–6.0 V) | Eliminates need for separate voltage regulators in mixed-supply systems - operates natively at 3.3 V or 5 V. |
| Asynchronous master reset | Enables system-wide initialization without waiting for clock edges - critical for fail-safe power-on reset sequences. |
| Clamp diode protected inputs | Permits safe connection to 12 V sensor signals via series resistor - avoids external protection components. |
| High noise immunity | CMOS threshold symmetry and >1.2 V noise margin reduce susceptibility to EMI in motor-drive environments. |
| Latch-up immunity >100 mA | Guarantees robustness against transient overcurrent events - meets industrial IEC 61000-4-4 compliance requirements. |
Applications
| Industrial PLC I/O Expansion | Digital Audio Sample Buffering |
|---|---|
Use Scenario: Latching parallel sensor status bits (e.g., limit switches, photoelectric sensors) into a microcontroller's GPIO port during scan cycle. IC Role / Device Role / Timing Role: Synchronous data register - captures 8-bit status snapshot on rising edge of system clock synchronized to PLC scan timer. Use Value: Eliminates metastability risk in noisy factory floors by enforcing strict tsu/th timing and providing glitch-immune MR for emergency stop recovery. | Use Scenario: Holding left/right channel sample data between ADC conversion and DSP processing in embedded audio codecs. IC Role / Device Role / Timing Role: Edge-triggered sample hold buffer - isolates analog front-end timing from variable DSP load cycles. Use Value: Enables deterministic 13 ns tpd latency and ±25 mA drive to feed multiple downstream logic stages without signal degradation. |
| Motor Control State Register | Legacy Bus Interface Latch |
Use Scenario: Storing PWM enable/disable states and direction flags for dual H-bridge drivers in HVAC blower modules. IC Role / Device Role / Timing Role: Reset-synchronized control register - MR tied to MCU reset line ensures known initial state at power-up. Use Value: Prevents unintended motor activation via guaranteed LOW default on Qn outputs until firmware writes valid configuration. | Use Scenario: Latching address/data from 8-bit microcontrollers (e.g., 8051 derivatives) onto shared memory or peripheral buses. IC Role / Device Role / Timing Role: Transparent data latch - Dn inputs sampled on CP edge, Qn outputs held stable for full bus cycle duration. Use Value: Provides clean 5 V-tolerant interface with 2.0–6.0 V supply flexibility - eliminates need for discrete level shifters in legacy designs. |
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 |
|---|---|---|---|
| 74HCT273D,652 | TTL-compatible inputs (VIH = 2.0 V, VIL = 0.8 V at VCC = 5 V); otherwise identical pinout, timing, and function. | Preferred when interfacing with legacy 5 V TTL logic families where CMOS-level thresholds cause marginal noise margins. | Select 74HCT273D,652 only if driving from standard TTL outputs; otherwise 74HC273N,652 offers superior noise immunity in mixed-signal environments. |
| SN74HC273PWR | TSSOP20 package (4.4 mm width), same electrical specs; thermal resistance 10.0 mW/K derating above 100 °C vs. SO20's 12.3 mW/K above 109 °C. | Better suited for space-constrained PCBs where SO20 footprint is prohibitive; requires rework of land pattern and stencil. | Choose SN74HC273PWR for high-density layouts; retain 74HC273N,652 for through-hole-compatible prototyping or thermal-heavy industrial enclosures. |
Compared with 74HCT273D,652 and SN74HC273PWR, the 74HC273N,652 delivers optimal noise margin in 5 V CMOS systems and mechanical compatibility with legacy SO20 sockets - making it the preferred choice for industrial control boards requiring long-term component availability and field-replaceable modules.
Availability
74HC273N,652 is available at Aetrix Electronics and suitable for industrial automation, motor control, and legacy bus interface applications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 74HC273N,652 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, reliable, and energy-efficient logic, analog, and discrete components - spun off from NXP in 2017 and headquartered in Nijmegen, Netherlands.
The 74HC273N,652 belongs to Nexperia's industry-standard 74HC logic family, designed specifically for robust, low-power, pin-compatible replacements of legacy TTL and earlier CMOS logic in industrial, automotive, and consumer equipment.
FAQ
What is the maximum clock frequency supported by the 74HC273N,652?
The 74HC273N,652 supports a maximum clock frequency of 24 MHz at VCC = 6.0 V and Tamb = +125 °C, derived from its worst-case propagation delay (tpd = 38 ns) and pulse width (tW = 15 ns) specifications. At 25 °C and VCC = 6.0 V, fmax reaches 122 MHz, but system-level timing must account for board trace delays and load capacitance. The 74HC273N,652 datasheet specifies 24 MHz as the guaranteed operational limit under full industrial temperature and voltage extremes.
Does the 74HC273N,652 require external pull-up or pull-down resistors on its inputs?
No, the 74HC273N,652 does not require external pull-up or pull-down resistors on MR, CP, or Dn inputs because all inputs have defined logic thresholds and internal protection structures. However, floating inputs must be avoided: unconnected Dn pins should be tied to VCC or GND to prevent increased ICC and potential oscillation. The 74HC273N,652 input leakage current is ≤±1 μA, ensuring stable DC bias without external biasing under normal operation.
Can the 74HC273N,652 drive LEDs directly?
Yes, the 74HC273N,652 can drive standard 2 mA indicator LEDs directly using its Qn outputs in active-LOW configuration (sink mode), as its rated output current is ±25 mA per pin. For a typical red LED (VF ≈ 1.8 V at 2 mA), connect the anode to VCC and cathode to Qn through a 1.5 kΩ current-limiting resistor. Do not exceed 25 mA per output or 50 mA total package current (ICC limit), and verify VOL ≤ 0.4 V at IO = 4 mA per the 74HC273N,652 datasheet.
What is the purpose of the clamp diodes in the 74HC273N,652 inputs?
The clamp diodes in the 74HC273N,652 inputs protect against overvoltage transients by shunting currents exceeding VCC + 0.5 V or falling below GND − 0.5 V to the supply rails. When interfacing with higher-voltage signals (e.g., 12 V sensors), a series current-limiting resistor must be used to restrict IIK to ≤±20 mA - enabling robust front-end signal conditioning without external TVS diodes. This feature is explicitly documented in the 74HC273N,652 functional description and limiting values table.
Is the 74HC273N,652 pin-compatible with the 74LS273?
No, the 74HC273N,652 is not pin-compatible with the 74LS273. While both are octal D flip-flops with MR and CP, the 74LS273 uses a different pinout: MR is on pin 11, CP on pin 10, Q0–Q7 occupy pins 1–4 and 12–15, and D0–D7 are on pins 5–8 and 16–19 - whereas the 74HC273N,652 places MR on pin 1, CP on pin 11, and interleaves D/Q pairs across pins 2–9 and 12–19. Direct replacement requires PCB redesign; use 74HCT273 variants only if TTL-level compatibility is needed.
74HC273N,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HC
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- 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:
- 122 MHz
- Max Propagation Delay @ V, Max CL:
- 26ns @ 6V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Iq):
- 8 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-DIP
74HC273N,652 FAQ
1.How can I place an order for 74HC273N,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC273N,652 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 74HC273N,652 reliable?
The price and inventory of 74HC273N,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC273N,652 is usually 5 days.
3.What payment methods are accepted for 74HC273N,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC273N,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC273N,652?
74HC273N,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC273N,652 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 74HC273N,652?
For technical support, including 74HC273N,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC273N,652 requirements.
6.How does Aetrix verify that 74HC273N,652 is sourced from the original manufacturer or authorized distributors?
All 74HC273N,652 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 74HC273N,652 meets industry standards.
7.What is the process for return or replacement of 74HC273N,652?
All 74HC273N,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC273N,652, 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 74HC273N,652 part is unused and in its original packaging.
Return procedure for 74HC273N,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HC273N,652 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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