Texas Instruments CD74HC4049M96G4

Overview

CD74HC4049M96G4 from Texas Instruments is a high-speed CMOS hex inverting buffer with level-shifting capability, supporting 15-V input logic down-conversion to 2–6-V output logic, 6ns typical propagation delay at 5V/15pF, and operation across –55°C to 125°C for industrial and military-grade systems including power supply monitoring and legacy interface bridging.

For engineers reviewing the CD74HC4049M96G4 datasheet, CD74HC4049M96G4 pinout, CD74HC4049M96G4 application, or CD74HC4049M96G4 equivalent, key selection criteria include its high-to-low voltage translation (up to 16V input), SOIC-16 package compatibility, LSTTL fanout support (10 loads), and robust ESD-protected input structure enabling reliable use in mixed-voltage signal conditioning.

Technical Context

The CD74HC4049M96G4 implements six independent inverting buffer channels using silicon-gate CMOS technology with a modified input protection structure that allows safe 0–15-V input voltage operation while powered from a 2–6-V VCC rail. Its logic-level translation function is enabled by input clamping diodes and gate oxide design tolerant of overvoltage stress.

Each channel provides balanced rise/fall times and low quiescent current (≤40 µA max at 125°C), with output drive capability of ±25mA per pin under DC conditions and TTL/CMOS load compatibility. The device is not compatible with HCT logic families due to its HC-series input thresholds and 2–6-V supply range.

Key Specifications

Pinout & Package

CD74HC4049M96G4 is housed in a 16-pin SOIC (D) package with 1.27mm pitch, JEDEC MS-012 compliant, moisture sensitivity level 1, and RoHS-compliant NiPdAu lead finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex inverting buffer applications.

Compared with CD74HC4049M96 and SN74LVX4049PW, the CD74HC4049M96G4 uniquely delivers 15V input tolerance with 2–6V supply flexibility and MSL-1 reflow readiness - making it the only option among the three qualified for wide-temperature, mixed-voltage industrial signal conditioning without derating or layout changes.

Availability

CD74HC4049M96G4 is available at Aetrix Electronics and suitable for industrial sensor interfaces, legacy bus signal conditioning, and power supply monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD74HC4049M96G4 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of heritage in high-reliability logic families and industrial-grade ICs.

The CD74HC4049M96G4 belongs to TI's CD74HC high-speed CMOS logic family, designed specifically for robust voltage translation, noise immunity, and extended-temperature operation in mission-critical industrial and defense systems.

FAQ

What is the maximum input voltage rating for CD74HC4049M96G4?

The CD74HC4049M96G4 supports an absolute maximum input voltage of 15V per the datasheet's DC input voltage specification (VI). This enables direct interfacing with 12V industrial signals without external attenuation. Exceeding 15V risks permanent damage, and the device is not rated for sustained 16V operation despite some references to "up to Vl = 16V" in feature summaries - the validated limit is 15V per Absolute Maximum Ratings table.

Can CD74HC4049M96G4 be used as a non-inverting buffer?

No, the CD74HC4049M96G4 is exclusively an inverting hex buffer. It contains six independent A→Y inverters (1A→1Y, 2A→2Y, etc.). For non-inverting functionality, the complementary part CD74HC4050M96G4 must be used. Cascading two CD74HC4049M96G4 stages per channel is not recommended due to added propagation delay, power consumption, and potential signal integrity degradation.

Is CD74HC4049M96G4 pin-compatible with CD74HC4049M96?

Yes, CD74HC4049M96G4 is fully pin-compatible with CD74HC4049M96. Both use the same SOIC-16 (D) package, identical pinout, and share identical electrical and thermal specifications. The G4 suffix denotes TI's green/RoHS-compliant packaging variant with NiPdAu lead finish and MSL-1 rating - no PCB layout changes are required when substituting CD74HC4049M96G4 for CD74HC4049M96.

Does CD74HC4049M96G4 require external pull-up resistors on its inputs?

No, CD74HC4049M96G4 does not require external pull-up resistors on its inputs. Its CMOS inputs have negligible leakage current (±1µA max at 125°C) and defined VIH/VIL thresholds across the full supply range. Pull-ups are only needed if the driving source is open-drain or high-impedance - the device itself has no internal pull-ups or pull-downs, and unused inputs must be tied to VCC or GND to prevent floating states.

What is the thermal resistance (θJA) of CD74HC4049M96G4 in its SOIC package?

The junction-to-ambient thermal resistance (θJA) for CD74HC4049M96G4 in the SOIC (D) package is 73°C/W, as specified in the Thermal Information table of the datasheet. This value assumes standard JEDEC 2-layer board conditions (1-inch² copper pad). Actual thermal performance may vary based on PCB layout, copper area, airflow, and adjacent heat sources - derating of maximum power dissipation should be applied accordingly in high-temperature environments.