Diodes Incorporated 74LV05AT14-13

Overview

74LV05AT14-13 from Diodes Incorporated is a hex inverter IC with six independent open-drain outputs, designed for voltage translation and power-down isolation in mixed-voltage digital systems. It operates from 2.0V to 5.5V, accepts 5.5V-tolerant inputs, sinks up to 12mA at V_CC = 4.5V, features I_OFF protection, and supports Schmitt-trigger inputs for noise immunity - used in PC peripheral signal conditioning and notebook I/O bus isolation.

For engineers reviewing the 74LV05AT14-13 datasheet, 74LV05AT14-13 pinout, 74LV05AT14-13 application, or 74LV05AT14-13 equivalent, key selection criteria include open-drain drive capability, I_OFF-enabled partial power-down behavior, input voltage translation (3.3V ↔ 5V), and TSSOP-14 thermal and layout compatibility in space-constrained embedded interfaces.

Technical Context

This device implements six identical CMOS inverter gates, each with an open-drain output requiring external pull-up for logic high assertion. The I_OFF circuit disables all outputs when V_CC = 0V, preventing back-current flow during system power sequencing - critical for hot-swap and multi-rail isolation.

All inputs incorporate Schmitt-trigger action (typ. 0.99V hysteresis at 3V), enabling robust noise rejection on slow or noisy control lines. Input voltage tolerance up to 5.5V allows direct interfacing with 5V logic while powered from 3.3V or 2.5V rails - eliminating level-shifter components in mixed-supply I²C, SMBus, or reset signal fanout applications.

Key Specifications

Pinout & Package

TSSOP-14 package: 4.9mm × 4.4mm body, 0.65mm pitch, 1.2mm height, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC06APW and 74AHC05PW, the 74LV05AT14-13 uniquely combines 5.5V input tolerance, I_OFF-enabled power-down safety, and open-drain flexibility - making it the sole choice for mixed-voltage I/O isolation in portable and industrial systems requiring guaranteed back-current prevention.

Availability

74LV05AT14-13 is available at Aetrix Electronics and suitable for USB peripheral signal isolation, industrial sensor conditioning, embedded display backlight control, and notebook battery status indication requiring stable component supply and long-term lifecycle support.

Supply support for 74LV05AT14-13 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, energy-efficient solutions for computing, industrial, and consumer markets.

The 74LV logic family targets low-voltage, mixed-supply digital interfacing - delivering interoperability between legacy 5V and modern sub-3.3V systems while maintaining robust ESD performance and power-down safety.

FAQ

Can 74LV05AT14-13 drive a 10kΩ pull-up to 5V while powered from 3.3V?

Yes. With 5.5V-tolerant inputs and open-drain outputs, it can sink current into a 5V pull-up while operating at V_CC = 3.3V. At I_OL = 6mA (typical for 3.3V operation), VOL remains ≤0.44V - ensuring valid logic-low margin with 5V pull-ups.

Does this device require external pull-up resistors on all outputs?

Yes. All six outputs are open-drain and lack internal pull-ups. External resistors (typically 2.2kΩ–10kΩ) must be connected between each Y pin and its target logic rail (e.g., 3.3V or 5V) to establish defined HIGH levels.

What happens to outputs during power-down (V_CC = 0V)?

When V_CC drops to 0V, the I_OFF circuit disables all outputs, limiting leakage to <5μA. This prevents back-current from externally powered buses (e.g., 5V I²C lines) into the unpowered IC - protecting both the device and upstream drivers.

Is the Schmitt-trigger hysteresis fixed or supply-dependent?

Hysteresis is supply-dependent: at V_CC = 3V, typical hysteresis is 0.99V (V_IL(D) ≈ 0.99V, V_IH(D) ≈ 2.31V). As V_CC increases, thresholds scale proportionally - preserving noise margin across the full 2.0–5.5V operating range.