Nexperia USA Inc. 74HCT280D-Q100J

Overview

74HCT280D-Q100J from Nexperia is a 9-bit TTL-level odd/even parity generator/checker in SO14 package, delivering simultaneous 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. It operates across -40 °C to +125 °C, supports supply voltages from 4.5 V to 5.5 V, and features AEC-Q100 Grade 1 qualification for automotive body control modules requiring data integrity verification.

For engineers reviewing the 74HCT280D-Q100J datasheet, 74HCT280D-Q100J pinout, 74HCT280D-Q100J application, or 74HCT280D-Q100J equivalent, this device serves as a deterministic combinatorial logic solution for real-time parity validation in CAN/FlexRay gateway nodes, EEPROM write-verify paths, and multi-sensor ADC data buses where bit-error detection must occur without clock dependency or latency variation.

Technical Context

This device implements fixed-function combinational logic with no internal state or clocking-parity computation occurs purely on input level transitions. All nine inputs (I0–I8) feed a dedicated XOR-based tree structure that directly drives two complementary outputs: PE asserts HIGH when an even count of inputs are HIGH; PO asserts HIGH when the count is odd.

Input thresholds are TTL-compatible (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5.0 V), ensuring seamless interfacing with legacy microcontrollers and discrete logic families. Output drive strength is ±4.0 mA at VCC = 4.5 V, supporting direct connection to 50 pF loads without external buffering while maintaining VOL ≤ 0.26 V and VOH ≥ 3.98 V under full load.

Key Specifications

Pinout & Package

74HCT280D-Q100J uses the SOT108-1 (SO14) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads, JEDEC MS-012 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 9-bit parity generator/checker applications.

Compared with 74HC280D-Q100J and SN74ALS280N, the 74HCT280D-Q100J uniquely balances automotive qualification, TTL compatibility, and nanosecond-level deterministic response-making it the sole choice for new AEC-Q100-compliant designs requiring zero-software parity assurance.

Availability

74HCT280D-Q100J is available at Aetrix Electronics and suitable for automotive body control units, EEPROM-based calibration systems, and multi-sensor ADC interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT280D-Q100J 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 specializing in high-performance, high-reliability logic, analog, and MOSFET solutions with leadership in automotive-grade components.

The 74HCT series delivers TTL-compatible CMOS logic optimized for automotive and industrial applications-designed to bridge legacy TTL systems with modern low-power, high-noise-immunity requirements.

FAQ

What is the maximum clock rate supported by 74HCT280D-Q100J?

74HCT280D-Q100J is a purely combinational device with no internal clock-it does not operate at a "clock rate." Its usable data throughput is determined by propagation delay: with tpd(max) = 63 ns at VCC = 4.5 V, it supports reliable parity checking of data words arriving no faster than ~15.9 MHz (1/63 ns). System-level timing must account for input rise/fall times and load capacitance.

Can 74HCT280D-Q100J be used with 3.3 V logic inputs?

No-74HCT280D-Q100J requires VCC = 4.5–5.5 V and has TTL input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V). A 3.3 V logic HIGH may fall below the guaranteed VIH minimum at temperature extremes, risking misreads. For 3.3 V systems, use 74LVC280 or add a level translator such as NXSL1T45.

How is cascading implemented for larger word sizes?

Cascading uses the PE output of one device as a data input to another: e.g., first 74HCT280D-Q100J processes bits I0–I8, its PE output connects to I0 of a second device, whose I1–I8 accept next 8 bits. The second device's PE then reflects even parity over all 17 bits. Up to nine devices may be cascaded using only PE outputs-no additional logic required.

Does 74HCT280D-Q100J support hot insertion or live swapping?

No-74HCT280D-Q100J lacks hot-swap protection circuitry. Its inputs have clamp diodes but no current-limiting or power-up sequencing control. Insertion while powered risks latch-up or excessive current if VCC ramps before GND stabilizes. Always power-cycle the board before replacement in field service scenarios.