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Nexperia USA Inc. 74HCT280PWJ
- Part No.:
- 74HCT280PWJ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Parity Generators and Checkers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74HCT280PWJ.pdf
- Description:
- 74HCT280PW/SOT402/TSSOP14
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
74HCT280PWJ from Nexperia is a 9-bit TTL-level odd/even parity generator/checker IC in TSSOP14 package, delivering PE (even parity) and PO (odd parity) outputs with propagation delay as low as 18 ns at VCC = 6.0 V and CL = 50 pF, operating across -40 °C to +125 °C, and used in data integrity verification for industrial bus interfaces and memory subsystems.
For engineers reviewing the 74HCT280PWJ datasheet, 74HCT280PWJ pinout, 74HCT280PWJ application, or 74HCT280PWJ equivalent, this page provides verified functional behavior, TTL-compatible input thresholds, thermal derating curves for TSSOP14, and cascading implementation guidance for multi-word parity systems.
Technical Context
The 74HCT280PWJ implements combinational logic to count HIGH states across nine inputs (I0–I8) and assert PE when the count is even, PO when odd-no internal latching or clocking. Its TTL-compatible inputs accept VIH ≥ 2.0 V and VIL ≤ 0.8 V at VCC = 4.5–5.5 V, enabling direct interfacing with legacy 5 V logic families.
Propagation delay varies with supply voltage and load: tpd = 21–63 ns (In→PE/PO) over VCC = 4.5–5.5 V and temperature range -40 °C to +125 °C, with output drive capability of ±4.0 mA at VOH ≥ 3.98 V and VOL ≤ 0.26 V under specified conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | 9-bit combinational odd/even parity generation and checking - no clock required, immediate output assertion on input change |
| Input Compatibility | TTL-level: VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 4.5–5.5 V - ensures interoperability with standard 5 V microcontrollers and bus transceivers |
| Supply Voltage Range | 4.5 V to 5.5 V - matches standard 5 V system rails with ±10% tolerance, excluding wider 2–6 V HC variant |
| Propagation Delay | 21 ns (typ) In→PE at VCC = 4.5 V, CL = 50 pF - determines maximum data rate in parity-checked parallel buses |
| Operating Temperature | -40 °C to +125 °C - supports extended-temperature industrial and automotive-adjacent control modules |
| Output Drive | ±4.0 mA at VOH ≥ 3.98 V / VOL ≤ 0.26 V - sufficient to drive multiple CMOS/TTL inputs without external buffers |
| Power Dissipation | ICC ≤ 160 μA (max) at VCC = 5.5 V, -40 °C to +125 °C - enables low-static-power system-level error detection |
Pinout & Package
TSSOP14 package (SOT402-1), 4.4 mm body width, 0.65 mm lead pitch, exposed pad not present, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | I6 | Data input bit 6 - one of nine dedicated inputs; tied HIGH/LOW or driven by parallel bus line |
| 2 | I7 | Data input bit 7 - contributes to parity count; no internal pull-up/down |
| 3 | n.c. | No connect - internally unconnected; must remain floating or grounded per design, not used for signal routing |
| 4 | I8 | Data input bit 8 - MSB of 9-bit group; critical for full-word parity coverage |
| 5 | PE | Even parity output - HIGH when even number of I0–I8 are HIGH; drives downstream error flag logic |
| 6 | PO | Odd parity output - HIGH when odd number of I0–I8 are HIGH; used for dual-check architectures |
| 7 | GND | Ground reference - return path for all internal logic and output currents; requires low-impedance PCB plane |
| 8 | VCC | Positive supply - powers internal gates and output drivers; bypass capacitor (100 nF) recommended at pin |
| 9 | I5 | Data input bit 5 - part of 9-bit set; shares same timing and loading characteristics as other inputs |
| 10 | I4 | Data input bit 4 - electrically identical to I0–I8; no input hysteresis or Schmitt trigger |
| 11 | I3 | Data input bit 3 - directly connected to internal parity tree; no series resistance or ESD diode limiting |
| 12 | I2 | Data input bit 2 - validated for 2000 V HBM ESD robustness per JS-001 Class 2 |
| 13 | I1 | Data input bit 1 - supports current-limiting resistor interface to voltages > VCC via integrated clamp diodes |
| 14 | I0 | Data input bit 0 - LSB of 9-bit group; functionally symmetric with all other inputs |
Key Features
| Feature | Design Value |
|---|---|
| 9-bit parity generation/checking | Single-package solution for full-byte+bit parity on 8-bit data plus enable/control line |
| Cascadable architecture | PE outputs from up to nine devices feed final-stage inputs - enables 17-bit+ parity without FPGA logic |
| TTL-compatible inputs | Eliminates level-shifting for legacy 5 V systems while maintaining CMOS power efficiency |
| Extended temperature operation | Guaranteed functionality from -40 °C to +125 °C - suitable for under-hood or factory-floor environments |
| Low dynamic power | CPD = 65 pF enables sub-1 mW dynamic dissipation at 1 MHz toggle rate and 5 V supply |
Applications
| Industrial PLC Backplane Bus | Legacy Memory Subsystem Integrity |
|---|---|
Use Scenario: Parallel data transfer between CPU and I/O modules over 16-bit backplane with noise-prone long traces. IC Role / Device Role / Timing Role: Parity checker verifying each 9-bit segment (8 data + 1 control) in real time, asserting fault flag on mismatch. Use Value: Detects single-bit errors induced by EMI or crosstalk before corrupted data reaches safety-critical logic. |
Use Scenario: SRAM read/write cycle in medical diagnostic equipment requiring data reliability certification. IC Role / Device Role / Timing Role: Generates even parity during write, checks parity during read - operates asynchronously with memory access strobes. Use Value: Enables fail-safe memory scrubbing and prevents undetected bit flips in stored calibration tables. |
| Automotive Body Control Module | Test Equipment Data Acquisition |
Use Scenario: CAN gateway node aggregating sensor data from LIN clusters into unified message frames. IC Role / Device Role / Timing Role: Parity generator for concatenated payload bytes prior to transmission - ensures frame-level integrity. Use Value: Adds lightweight, deterministic error detection layer without MCU overhead or latency penalty. |
Use Scenario: Automated test fixture validating 8-bit microcontroller outputs using parallel capture. IC Role / Device Role / Timing Role: Real-time parity checker comparing expected vs. actual output vectors during functional test. Use Value: Reduces test time by detecting bit errors immediately instead of post-processing captured waveforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 9-bit parity generation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HC280PW | CMOS-level inputs (VIH ≥ 3.15 V @ VCC = 4.5 V); higher propagation delay (20 ns typ) | Requires level-shifting when interfacing with TTL or 3.3 V logic; unsuitable for mixed-voltage 5 V systems | Select only if system uses pure CMOS signaling and lower power (<10 μA ICC) is prioritized over interface simplicity |
| SN74LS280N | Bipolar TTL technology; VIH = 2.0 V, but ICC = 24 mA typical - 300× higher static power | Limited to commercial temperature range (0 °C to +70 °C); incompatible with extended-temperature designs | Choose only for legacy board replacements where footprint compatibility with DIP-14 is mandatory and power budget allows |
Compared with 74HC280PW and SN74LS280N, the 74HCT280PWJ uniquely balances TTL compatibility, extended temperature support, and micropower operation - making it optimal for new industrial designs requiring robust, low-overhead parity checking without MCU involvement.
Availability
74HCT280PWJ is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, and medical memory subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HCT280PWJ 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 discrete components, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The 74HCT280 belongs to Nexperia's 74HCT logic family, engineered for seamless integration between TTL and CMOS systems while delivering robust performance across harsh environmental conditions.
FAQ
Can the 74HCT280PWJ be used with 3.3 V logic inputs?
No - the 74HCT280PWJ requires TTL-compatible input levels: VIH ≥ 2.0 V and VIL ≤ 0.8 V at VCC = 4.5–5.5 V. A 3.3 V logic HIGH may fall below the guaranteed VIH threshold, risking metastability or incorrect parity output. Level-shifting circuitry or use of the 74LVC280 is required for 3.3 V systems.
What is the maximum number of 74HCT280PWJ devices that can be cascaded for wider parity checking?
Up to nine 74HCT280PWJ devices can be cascaded: their PE outputs feed the I0–I8 inputs of a final-stage device. This configuration supports up to 81-bit parity (9 × 9 bits). Beyond nine, fan-out limitations and cumulative propagation delay (>500 ns) degrade timing margin and reliability.
Does the 74HCT280PWJ include internal pull-up or pull-down resistors on its inputs?
No - all nine data inputs (I0–I8) are uncommitted CMOS/TTL inputs with no internal pull-up or pull-down resistors. Unused inputs must be externally tied HIGH or LOW to prevent floating states that cause excessive current draw and logic uncertainty.
How does the n.c. pin (pin 3) affect PCB layout or thermal performance?
Pin 3 is a true no-connect - internally unconnected and electrically isolated. It imposes no electrical constraints, but must not be soldered to ground or power planes. Thermal impact is negligible; however, maintaining standard TSSOP14 reflow profile and avoiding solder bridging ensures mechanical reliability.
74HCT280PWJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Parity Generator/Checker
- Number of Circuits:
- 9
- Current - Output High, Low:
- 4mA, 4mA
- Voltage - Supply:
- 4.5 V ~ 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
74HCT280PWJ FAQ
1.How can I place an order for 74HCT280PWJ through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT280PWJ 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 74HCT280PWJ reliable?
The price and inventory of 74HCT280PWJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT280PWJ is usually 5 days.
3.What payment methods are accepted for 74HCT280PWJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT280PWJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT280PWJ?
74HCT280PWJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT280PWJ 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 74HCT280PWJ?
For technical support, including 74HCT280PWJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT280PWJ requirements.
6.How does Aetrix verify that 74HCT280PWJ is sourced from the original manufacturer or authorized distributors?
All 74HCT280PWJ 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 74HCT280PWJ meets industry standards.
7.What is the process for return or replacement of 74HCT280PWJ?
All 74HCT280PWJ units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT280PWJ, 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 74HCT280PWJ part is unused and in its original packaging.
Return procedure for 74HCT280PWJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT280PWJ Tags
-
74HCT280D,653
Nexperia USA Inc.
-
M74HC280YRM13TR
STMicroelectronics
-
SN74F280BNSR
Texas Instruments
-
SN74AS280N
Texas Instruments
-
SN74F280BDR
Texas Instruments
-
SN74F280BN
Texas Instruments
-
74HC280D,653
Nexperia USA Inc.
-
74HCT280PWJ
Nexperia USA Inc.
-
SN74LS280N
Texas Instruments
-
SN74LS280M
onsemi
-
MC74F280D
onsemi
-
MC74F280DR2
onsemi
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