NXP Semiconductors 74HC4049DB,112

Overview

74HC4049DB,112 from Nexperia is a hex inverting HIGH-to-LOW level shifter IC with overvoltage-tolerant inputs (up to 15 V), operating across 2.0–6.0 V supply, delivering 6 independent CMOS inverters in a 16-pin SSOP package (SOT338-1). It enables bidirectional voltage translation between higher-voltage logic domains (e.g., 12 V) and lower-voltage digital systems (e.g., 3.3 V or 5 V microcontrollers), supporting industrial control I/O interfacing.

For engineers reviewing the 74HC4049DB,112 datasheet, 74HC4049DB,112 pinout, 74HC4049DB,112 application, or 74HC4049DB,112 equivalent, key selection criteria include input overvoltage tolerance (15 V), propagation delay (8–26 ns at VCC = 4.5–6.0 V), output drive capability (±4 mA at 4.5 V), wide temperature range (−40 °C to +125 °C), and compatibility with legacy 74HC logic families.

Technical Context

The 74HC4049DB,112 implements six independent CMOS inverter stages, each featuring diode-clamped inputs rated for 15 V absolute maximum input voltage-enabling direct connection to higher-voltage signal sources without external level-shifting components. Its internal structure includes polysilicon resistor-based input protection (Fig. 4) and rail-to-rail output swing.

It operates under JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V) standards, with static input leakage ≤ ±0.5 μA at VI = 15 V and dynamic power dissipation governed by CPD = 14 pF. Propagation delays are specified across VCC = 2.0 V to 6.0 V and load conditions (CL = 50 pF), with tpd as low as 8 ns at 6.0 V.

Key Specifications

Pinout & Package

74HC4049DB,112 is housed in a 16-pin SSOP package (SOT338-1), 5.3 mm × 6.2 mm body, 0.65 mm lead pitch. Pin 1 marked by index notch; pin 13 and 16 are not connected (n.c.).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVC4049PW,118 and SN74LVTH16244DGGR, the 74HC4049DB,112 uniquely delivers true 15 V input tolerance with inverting logic in a compact SSOP package-making it the sole option among these three for robust, component-free HIGH-to-LOW translation in mixed-voltage industrial control.

Availability

74HC4049DB,112 is available at Aetrix Electronics and suitable for industrial sensor interfaces, motor drive control logic, legacy system integration, and programmable logic I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC4049DB,112 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, energy-efficient logic, analog, and discrete devices, with manufacturing rooted in process innovation and automotive-grade reliability.

The 74HC4049 belongs to Nexperia's 74HC logic family-designed specifically for robust, low-power, mixed-voltage digital interfacing in industrial automation, building controls, and power electronics where signal integrity and voltage domain bridging are critical.

FAQ

Can 74HC4049DB,112 be used for LOW-to-HIGH level shifting?

No. The 74HC4049DB,112 is a dedicated HIGH-to-LOW level shifter: its inputs tolerate up to 15 V while outputs swing only from 0 V to VCC (max 6.0 V). It cannot translate sub-VCC inputs (e.g., 1.8 V) to higher voltages. For bidirectional or LOW-to-HIGH translation, a dedicated dual-supply translator like TXB0106 or discrete MOSFET solution is required.

What is the maximum capacitive load this device can drive reliably?

The 74HC4049DB,112 is characterized with CL = 50 pF in dynamic testing (Table 7), and its output drive strength (±4 mA at VCC = 4.5 V) supports typical loads up to 75 pF while maintaining tpd < 25 ns and transition times < 22 ns. For loads exceeding 100 pF, propagation delay increases significantly and may require local buffering.

Are pins 13 and 16 internally connected or truly unused?

Pins 13 and 16 are confirmed as not connected (n.c.) per Table 2 and Figure 5 pinning diagrams for SOT338-1. They have no internal bond wires or silicon connections. Leaving them unconnected is safe; tying them to GND or VCC is permissible only for mechanical stability but adds no electrical benefit and may increase parasitic capacitance.

Does this device support hot-swap or live-insertion?

No. The 74HC4049DB,112 lacks hot-swap protection circuitry such as power-on reset, I²C-style slew-rate limiting, or back-drive prevention. Applying input signals before VCC stabilization risks violating absolute maximum ratings (e.g., VI > VCC + 0.5 V), potentially causing latch-up or accelerated wear. Power sequencing-VCC first, then inputs-is mandatory.