NXP Semiconductors 74HC4049D,652

Overview

74HC4049D,652 from Nexperia is a hex inverting HIGH-to-LOW level shifter with overvoltage-tolerant inputs rated to 15 V, operating across 2.0 V–6.0 V supply, delivering 6 independent CMOS inverters optimized for interfacing between higher-voltage logic domains (e.g., 12 V or 15 V) and lower-voltage 3.3 V/5 V digital systems in industrial control I/O modules.

For engineers reviewing the 74HC4049D,652 datasheet, 74HC4049D,652 pinout, 74HC4049D,652 application, or 74HC4049D,652 equivalent, key selection criteria include input overvoltage tolerance, propagation delay at 6.0 V (8–14 ns), output drive capability (±5.2 mA), VIH/VIL thresholds across temperature, and SO16 package compatibility with legacy PCB footprints.

Technical Context

The device implements six independent CMOS inverter stages, each with diode-clamped inputs enabling safe operation when driven by voltages up to 15 V while powered from as low as 2.0 V - critical for bidirectional voltage translation without external components. Input clamping is achieved via polysilicon resistors and protection diodes referenced to VCC and GND.

Each inverter exhibits rail-to-rail output swing, with VOH ≥ 5.48 V and VOL ≤ 0.26 V at VCC = 6.0 V and IO = ±5.2 mA, and maintains stable timing performance across -40 °C to +125 °C ambient, supported by JESD7A compliance and latch-up immunity exceeding 100 mA per JESD78 Class II Level B.

Key Specifications

Pinout & Package

74HC4049D,652 uses the SOT109-1 (SO16) plastic small outline package: 16-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 hex inverting level shifting applications.

Compared with SN74LVX4049M and 74LVC4049PW, the 74HC4049D,652 uniquely combines 15 V input tolerance, -40 °C to +125 °C operation, and SO16 footprint compatibility - making it the sole option for ruggedized, mixed-voltage industrial control where thermal and voltage margins are non-negotiable.

Availability

74HC4049D,652 is available at Aetrix Electronics and suitable for industrial sensor interfaces, PLC digital I/O modules, motor drive feedback circuits, and automotive body control units requiring stable component supply across extended temperature ranges and mixed-voltage signal chains.

Supply support for 74HC4049D,652 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 MOSFET solutions for automotive, industrial, and consumer markets.

The 74HC4049 belongs to Nexperia's HC logic family - engineered for robust level shifting and noise-immune signal conditioning in harsh industrial and automotive environments where voltage domain bridging is essential.

FAQ

Can 74HC4049D,652 be used with VCC = 3.3 V while accepting 12 V inputs?

Yes. The device is explicitly designed for this configuration: inputs tolerate up to 15 V regardless of VCC, which may be set to 2.0–6.0 V. At VCC = 3.3 V, VIH is 2.3 V (min) and VOL remains ≤ 0.33 V at 4 mA sink, ensuring compatibility with 3.3 V logic families while safely accepting 12 V sensor signals.

What is the maximum capacitive load the outputs can drive without violating timing specs?

The dynamic characteristics specify CL = 50 pF as the test condition for propagation delay and transition time measurements. At VCC = 6.0 V, tpd remains within 14 ns (max) and tt within 19 ns (max) up to 50 pF. Driving >50 pF increases delay nonlinearly; for 100 pF loads, measured tpd exceeds 22 ns - verify timing margins in target application using actual layout parasitics.

Are pins 13 and 16 truly unconnected, or do they serve an internal function?

Pins 13 and 16 are confirmed no-connect (n.c.) terminals per Nexperia's official pin description table and functional diagrams. They are not bonded to die and have no internal connection. PCB land patterns must omit traces to these pins; connecting them risks unintended coupling or mechanical stress on unbonded leads.

How does the 74HC4049D,652 handle input signals that exceed VCC + 0.5 V?

Internal input clamping diodes conduct excess current to VCC when VI exceeds VCC + 0.5 V, limiting voltage at the gate oxide. The absolute maximum rating allows VIK up to +16 V, and clamping current is limited to ±20 mA. External series resistance must be used if sustained current exceeds 20 mA to prevent thermal overstress of internal clamps.