STMicroelectronics HCF4049UM013TR

Overview

HCF4049UM013TR from STMicroelectronics is a CMOS hex inverting buffer/converter IC designed for logic-level translation between CMOS and DTL/TTL families, featuring six independent inverters, 40 ns typical propagation delay at VDD = 10 V with CL = 50 pF, ±100 nA max input leakage at VDD = 18 V, and operation across 3–20 V supply range. It drives two standard DTL/TTL loads directly (VOL ≤ 0.05 V, IOL ≥ 3.2 mA at VDD = 5 V) in industrial control interfaces.

For engineers reviewing the HCF4049UM013TR datasheet, HCF4049UM013TR pinout, HCF4049UM013TR application, or HCF4049UM013TR equivalent, key selection criteria include single-supply level-shifting capability, high sink/source drive strength (±3.2 mA to ±24 mA depending on VDD), wide temperature range (−55 °C to +125 °C), and NC-pin-aware PCB layout for DIP-16 footprint compatibility.

Technical Context

The HCF4049UM013TR implements six independent CMOS inverter stages using enhancement-mode MOSFETs with buffered inputs, enabling VIH levels up to 15 V even when VDD = 5 V-critical for translating higher-voltage logic into lower-voltage systems. Its output stage supports rail-to-rail swing with VOH ≥ 4.95 V and VOL ≤ 0.05 V at VDD = 5 V.

It operates without external biasing, requiring only VDD and VSS connections, and maintains noise margins of ≥1 V (at VDD = 5 V), ≥2 V (at VDD = 10 V), and ≥2.5 V (at VDD = 15 V), ensuring robust immunity against signal coupling in mixed-voltage digital subsystems.

Key Specifications

Pinout & Package

Supplied in 16-pin plastic DIP package (0.3-inch width), with 3.3 mm lead length, 2.54 mm pin pitch, and through-hole mounting compatibility. Pin 13 and Pin 16 are internally unconnected (NC) and must remain floating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar inverting buffer/level-shifter applications.

Compared with CD4049UBE and 74HC04D, the HCF4049UM013TR uniquely combines overvoltage-tolerant inputs, rail-to-rail outputs, and −55 °C to +125 °C qualification - making it the sole choice for ruggedized mixed-voltage industrial signal conditioning.

Availability

HCF4049UM013TR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, motor drive enable logic, and legacy system voltage translation requiring stable component supply across extended temperature and voltage ranges.

Supply support for HCF4049UM013TR 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, specializing in automotive, industrial, and power management ICs with broad analog, digital, and mixed-signal portfolios.

The HCF4049UM013TR belongs to ST's legacy HCF4000B series of radiation-hardened, high-voltage CMOS logic devices, engineered specifically for robust level translation and interface bridging in harsh-environment control systems.

FAQ

Can HCF4049UM013TR operate with VDD = 3.3 V?

Yes - the device is specified down to VDD = 3 V per Recommended Operating Conditions. At 3.3 V, VOH ≈ 3.25 V and VOL ≈ 0.05 V, supporting interface with 3.3 V logic. However, input thresholds scale with VDD, so VIH ≈ 2.4 V and VIL ≈ 0.9 V; verify source driver compatibility.

Are Pins 13 and 16 truly unconnected internally?

Yes - mechanical and electrical data confirm Pins 13 and 16 have no internal bond wire or silicon connection. They must remain unconnected on PCB; routing traces or applying solder paste risks parasitic coupling or mechanical stress-induced failure.

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

Test data specifies dynamic performance up to CL = 50 pF. With heavier loads (e.g., >100 pF), propagation delay increases nonlinearly and output transition times degrade - add series resistance or buffer stages if driving long traces or multiple inputs.

Does HCF4049UM013TR support hot-swap or live-insertion?

No - the device lacks power-on reset, bus-hold, or Ioff protection. Applying VDD before or after input signals may cause latch-up or excessive current. Always power VDD and VSS first, then apply inputs; use series resistors on inputs during hot-swap scenarios.