Texas Instruments CD74HC4049M96E4

Overview

CD74HC4049M96E4 from Texas Instruments is a high-speed CMOS hex inverting buffer with level-shifting capability, supporting 15-V input logic down-converted to 0–6-V output logic. It delivers 6ns typical propagation delay at 5V/15pF, operates across –55°C to 125°C, and drives up to 10 LSTTL loads per output. Used in industrial interface translation between legacy high-voltage logic and modern low-voltage microcontrollers.

For engineers reviewing the CD74HC4049M96E4 datasheet, CD74HC4049M96E4 pinout, CD74HC4049M96E4 application, or CD74HC4049M96E4 equivalent, key selection criteria include its 16-V absolute input voltage rating, SOIC-16 package compatibility, guaranteed operation at 2–6V VCC, and verified inverting buffer functionality without external biasing.

Technical Context

The CD74HC4049M96E4 implements six independent inverting buffer stages with modified input protection enabling safe 15-V DC input operation while powered from a 2–6-V supply. Its silicon-gate CMOS process ensures balanced rise/fall times and low quiescent current (≤40 µA over temperature).

Unlike standard HC logic, it supports true high-to-low voltage level translation without external components - inputs tolerate –0.5V to +16V independent of VCC, while outputs swing rail-to-rail (0V to VCC) with ±25mA drive capability per pin and 10pF input capacitance.

Key Specifications

Pinout & Package

CD74HC4049M96E4 is housed in a 16-pin SOIC (Small Outline Integrated Circuit) 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 inverting buffer with level-shifting applications.

Compared with SN74LVTH16244DGGR and 74LVC1G04GW,125, the CD74HC4049M96E4 uniquely combines six inverting channels, 16-V input tolerance, and –55°C to +125°C operation - making it irreplaceable in mixed-voltage industrial and defense systems where robustness and integration outweigh raw speed or density.

Availability

CD74HC4049M96E4 is available at Aetrix Electronics and suitable for industrial PLC I/O interface, automotive sensor conditioning, and military data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD74HC4049M96E4 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 over 50 years of innovation in high-reliability IC design.

The CD74HC4049M96E4 belongs to TI's CD74HC high-speed CMOS logic family, engineered for robust level translation and noise-immune operation in harsh industrial and aerospace environments.

FAQ

What is the maximum input voltage the CD74HC4049M96E4 can safely accept?

The CD74HC4049M96E4 supports an absolute maximum input voltage of +16V on any input pin, independent of VCC. This allows direct interfacing with 12V and 15V logic families without external protection. The device also tolerates –0.5V inputs, making it suitable for applications with negative transients or bipolar signal sources. Always observe the –0.5V to +16V limit to prevent permanent damage.

Does the CD74HC4049M96E4 require external pull-up or pull-down resistors on unused inputs?

No, the CD74HC4049M96E4 does not require external pull-up or pull-down resistors on unused inputs. Its CMOS inputs have extremely low leakage (±1µA max), and the internal structure provides sufficient noise immunity without external biasing. However, for best practice in noise-sensitive environments, unused inputs should be tied to VCC or GND - never left floating - to prevent unintended switching and increased power consumption.

Can the CD74HC4049M96E4 operate with a 3.3V supply while accepting 5V inputs?

Yes, the CD74HC4049M96E4 can operate with a 3.3V VCC while reliably accepting 5V inputs. Its input protection architecture allows input voltages up to +16V regardless of supply voltage, and its output will swing from 0V to 3.3V. This makes the CD74HC4049M96E4 ideal for bridging 5V legacy subsystems to modern 3.3V microcontrollers without additional level-shifting circuitry.

Is the CD74HC4049M96E4 pin-compatible with older CD4049UB or 74HC4049 variants?

The CD74HC4049M96E4 shares identical pinout and logic function with CD4049UB and 74HC4049 devices in SOIC-16 packages, but differs in electrical specifications: it offers faster propagation delay (6ns vs. ~50ns for CD4049UB), wider VCC range (2–6V vs. 3–15V), and enhanced input protection. While functionally interchangeable in many designs, verify timing margins and input voltage requirements before drop-in replacement.

What is the thermal performance of the CD74HC4049M96E4 in SOIC package?

The CD74HC4049M96E4 in SOIC (D) package has a junction-to-ambient thermal resistance (θJA) of 73°C/W. At maximum rated ambient temperature (+125°C) and worst-case power dissipation (≈15mW per gate × 6 gates = 90mW), junction temperature remains below 150°C - within the plastic package limit. For continuous high-load operation, ensure adequate PCB copper pour and airflow to maintain reliability.