STMicroelectronics 74VHC05TTR

Overview

74VHC05TTR from STMicroelectronics is a high-speed CMOS hex inverter with open-drain outputs, designed for level-shifting and wired-OR logic interfacing between 3V and 5V systems. It features 3.8 ns typical propagation delay at 5V, 2 µA max quiescent current at 25°C, and operates across 2V–5.5V supply range - enabling use in mixed-voltage I²C bus pull-up, LED driver control, and microcontroller GPIO expansion.

For engineers reviewing the 74VHC05TTR datasheet, 74VHC05TTR pinout, 74VHC05TTR application, or 74VHC05TTR equivalent, key selection criteria include open-drain output drive capability (8 mA sink at 4.5V), input tolerance up to 7V independent of VCC, ESD immunity (2 kV HBM), and guaranteed operation from –55°C to +125°C.

Technical Context

The 74VHC05TTR implements six independent inverting buffers with open-drain outputs, each capable of sinking up to 8 mA at 4.5V VCC while maintaining VOL ≤ 0.55 V. Its inputs accept voltages from –0.5 V to 7.0 V regardless of supply voltage, enabling robust hot-swap and level-translation functionality without external clamping diodes.

Internally fabricated using sub-micron C2MOS technology, the device integrates three-stage buffered output drivers that deliver high noise immunity (VNIH/VNIL ≥ 28% VCC) and low dynamic noise (VOLP ≤ 0.8 V). Power-down protection ensures safe operation during partial power sequencing.

Key Specifications

Pinout & Package

TSSOP-14 package: 4.4 mm × 5.0 mm body, 0.65 mm pitch, 1.05 mm height, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex open-drain inverter applications.

Compared with SN74LVC05APW and 74AHC05PW, the 74VHC05TTR uniquely balances ultra-low ICC, 7V input tolerance, and industrial temperature range - making it optimal for battery-powered or automotive subsystems where reliability under voltage mismatch is non-negotiable.

Availability

74VHC05TTR is available at Aetrix Electronics and suitable for I²C bus design, LED driver circuits, GPIO expansion interfaces, and industrial sensor signal conditioning requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for 74VHC05TTR 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, delivering intelligent power, sensing, and control solutions for automotive, industrial, and consumer markets.

The 74VHC series targets high-speed, low-power CMOS logic applications demanding robustness in mixed-voltage and harsh-environment designs - especially where level translation, noise immunity, and wide operating temperature are critical.

FAQ

Can 74VHC05TTR be used with a 3.3V supply to drive a 5V pull-up?

Yes. With VCC = 3.3V, the 74VHC05TTR's open-drain outputs can safely sink current from a 5V pull-up resistor. Its inputs tolerate up to 7V, so 5V signals may be applied directly to inputs regardless of VCC level - enabling seamless 3.3V-to-5V level translation without additional components.

Does 74VHC05TTR require external pull-up resistors on its outputs?

Yes. As an open-drain device, each output must be connected to a positive supply rail (VCC or another voltage) via an external pull-up resistor to generate a HIGH logic level. The value depends on bus capacitance and required rise time; 1 kΩ–10 kΩ is typical for I²C or general-purpose logic interfacing.

What is the maximum output sink current per channel at 125°C?

At TA = 125°C and VCC = 4.5V, the 74VHC05TTR guarantees 4 mA sink current with VOL ≤ 0.55 V (per DC specs Table 6). Derating applies above 85°C ambient; full 8 mA rating is specified only from –55°C to +85°C.

Is 74VHC05TTR pin-compatible with standard 74LS05 or 74HC05?

Yes - it is functionally and pin-compatible with 74-series 05 inverters (e.g., 74HC05, 74LS05), sharing identical TSSOP-14 pinout and truth table. However, unlike 74LS05, it has open-drain outputs (not totem-pole), and unlike 74HC05, it offers 7V input tolerance and improved latch-up immunity.