STMicroelectronics M74HC280YRM13TR

Overview

M74HC280YRM13TR from STMicroelectronics is a high-speed CMOS 9-bit parity generator IC with automotive-grade qualification (AEC-Q100), operating from 2 V to 6 V, delivering tPD = 22 ns (typ.) at 6 V, ICC ≤ 4 μA (max.) at 25 °C, and dual ΣODD/ΣEVEN outputs for flexible odd/even parity generation in data integrity systems used in engine control units and infotainment gateways.

For engineers reviewing the M74HC280YRM13TR datasheet, M74HC280YRM13TR pinout, M74HC280YRM13TR application, or M74HC280YRM13TR equivalent, this page provides verified functional behavior, SO14 automotive package details, truth-table–driven output logic, propagation delay specs across temperature, and validated drop-in alternatives for parity-checking subsystems in safety-critical automotive electronics.

Technical Context

The M74HC280YRM13TR implements combinational logic that counts high-level inputs among nine data lines (A–I) and asserts ΣODD high when the count is odd (1,3,5,7,9) and ΣEVEN high when even (0,2,4,6,8). It uses silicon gate C2MOS technology for low static current and rail-to-rail output swing.

Its symmetrical output drive (|IOH| = IOL ≥ 4 mA) ensures matched rise/fall times (tPLH ≅ tPHL), while ESD protection (HBM: 2 kV, MM: 200 V, CDM: 1 kV) supports robust operation in noisy vehicle environments. Input thresholds are defined as VIH ≥ 3.15 V and VIL ≤ 1.35 V at VCC = 4.5 V.

Key Specifications

Pinout & Package

Package: SO14 (Small Outline, 14-pin, 3.9 mm body width, 1.27 mm pitch), RoHS-compliant, automotive-grade molding compound per AEC-Q200.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74HC280DR and MC74HC280ADTG, the M74HC280YRM13TR uniquely delivers AEC-Q100 Grade 1 qualification, sub-4 μA quiescent current, and guaranteed 22 ns typical propagation at 6 V - making it the only choice for new automotive designs requiring both functional safety alignment and low-power operation.

Availability

M74HC280YRM13TR is available at Aetrix Electronics and suitable for engine control units, ADAS sensor hubs, infotainment gateways, and electric power steering systems requiring stable component supply with automotive-grade traceability and long-term lifecycle support.

Supply support for M74HC280YRM13TR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The M74HC280YRM13TR belongs to ST's automotive-qualified HC logic family, engineered specifically for high-reliability data integrity functions in harsh-temperature vehicle subsystems where deterministic timing and low static power are mandatory.

FAQ

What is the maximum clock frequency supported by M74HC280YRM13TR for reliable parity generation?

The M74HC280YRM13TR is a purely combinational device with no internal clock; its usable data rate depends on propagation delay and system setup/hold timing. With tPHL/tPLH ≤ 49 ns (max) at VCC = 6 V and −40 °C to +125 °C, it supports reliable operation in data paths up to ~10 MHz when interfaced with standard HC-compatible drivers and receivers.

Can M74HC280YRM13TR be used to generate parity for more than 9 bits?

Yes - the device supports cascading via its ΣODD and ΣEVEN outputs. For example, two units can validate 18 bits: first unit processes bits A–I, second processes J–R, and their respective ΣODD outputs feed a third unit's inputs to compute overall odd parity. No additional glue logic is required beyond wire interconnect.

Is Pin 3 (NC) safe to connect to ground or VCC in PCB layout?

Pin 3 is internally unconnected and must remain floating per ST's design guidance. Tying it to GND or VCC may cause unpredictable current paths or violate internal ESD structure symmetry. ST recommends leaving it unpopulated or using a keep-out zone - no solder mask opening or trace routing is permitted.

Does M74HC280YRM13TR support mixed-voltage operation (e.g., 3.3 V inputs with 5 V VCC)?

No - all inputs must remain within 0 V to VCC. Applying 3.3 V to an input while VCC = 5 V is acceptable (VIH = 3.15 V min at 4.5 V), but applying 5 V to an input while VCC = 3.3 V violates absolute maximum rating (VI ≤ VCC + 0.5 V) and risks latch-up or permanent damage.