Texas Instruments SN74LV8151DGVRE4

Overview

SN74LV8151DGVRE4 from Texas Instruments is a 10-bit universal Schmitt-trigger buffer with 3-state outputs, supporting 2-V to 5.5-V V_CC operation, max 15-ns propagation delay at 5 V, and polarity-selectable true/complementary Y1–Y8 outputs via T/C pin. It enables robust signal conditioning in mixed-voltage digital interfaces such as industrial I/O expansion and legacy bus buffering.

For engineers reviewing the SN74LV8151DGVRE4 datasheet, SN74LV8151DGVRE4 pinout, SN74LV8151DGVRE4 application, or SN74LV8151DGVRE4 equivalent, key selection criteria include Schmitt-trigger hysteresis (0.33 V typ at 3.3 V), I_off partial-power-down support, mixed-mode voltage tolerance, and TVSOP-24 package compatibility with high-density PCB layouts.

Technical Context

This device integrates two dedicated Schmitt-trigger paths (A→P noninverting, B→N inverting) plus eight configurable D→Y buffers whose logic polarity (true or complementary) is controlled by the T/C input. All 10 outputs are individually enabled/disabled via a shared OE pin driving 3-state output drivers.

The architecture supports simultaneous operation across voltage domains: inputs accept 0–5.5 V regardless of V_CC, outputs drive to V_CC levels, and I_off protection disables outputs during power-down to prevent backflow current. Input hysteresis (ΔV_T = 0.33 V typ at 3.3 V) ensures noise immunity for slow-rising signals.

Key Specifications

Pinout & Package

SN74LV8151DGVRE4 uses a 24-pin TVSOP (Thin Very Small Outline Package) with 0.4-mm lead pitch, 4.4-mm width, and 1.2-mm max height - optimized for space-constrained PCBs requiring fine-pitch surface-mount assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit Schmitt-trigger buffer applications.

Compared with SN74LV8151DGVRE4, SN74LVC8T245PWRE4 trades Schmitt noise immunity and I_off for dual-supply flexibility, while SN74LVTH16244DGGR offers greater channel count but no hysteresis or power-down safety - making SN74LV8151DGVRE4 uniquely suited for ruggedized, mixed-voltage I/O conditioning.

Availability

SN74LV8151DGVRE4 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and test equipment digital pattern generation requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for SN74LV8151DGVRE4 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in industrial-grade logic and interface solutions.

The SN74LV8151DGVRE4 belongs to TI's LV family of low-voltage, high-noise-immunity logic devices, designed specifically for robust signal conditioning in harsh electromagnetic environments and mixed-voltage embedded systems.

FAQ

What is the function of the T/C pin on the SN74LV8151DGVRE4?

The T/C (True/Complement) pin on the SN74LV8151DGVRE4 configures the logic polarity of all eight Y1–Y8 outputs: when T/C is high, outputs mirror D1–D8 (true logic); when low, outputs invert D1–D8 (complementary logic). This single-pin control eliminates the need for external inverters in applications requiring dynamic polarity selection, such as test pattern generation or configurable I/O mapping. The SN74LV8151DGVRE4 datasheet specifies this behavior in the Function Tables section.

Does the SN74LV8151DGVRE4 support partial power-down operation?

Yes, the SN74LV8151DGVRE4 supports partial power-down operation via its I_off circuitry, which disables all outputs and limits leakage current to <5 µA when V_CC = 0 V. This prevents damaging back-current flow from live inputs or outputs into the unpowered device - a critical feature for hot-swap capable systems and modular power architectures. The SN74LV8151DGVRE4 specification confirms I_off compliance in the Absolute Maximum Ratings and Electrical Characteristics tables.

What is the maximum propagation delay for the SN74LV8151DGVRE4 at 3.3 V?

At V_CC = 3.3 V, the maximum propagation delay (t_pd) for the SN74LV8151DGVRE4 is 29 ns for D→Y paths and 26 ns for A→P/B→N paths under CL = 15 pF and TA = 25°C, as specified in the Switching Characteristics table of the SCES610 datasheet. This ensures timing predictability in 3.3-V digital control loops and industrial communication interfaces operating up to ~15 MHz.

Can the SN74LV8151DGVRE4 interface between 5-V and 3.3-V logic domains?

Yes, the SN74LV8151DGVRE4 supports mixed-mode voltage operation: its inputs tolerate 0–5.5 V regardless of V_CC, and outputs swing rail-to-rail between GND and V_CC. When powered at 3.3 V, it safely accepts 5-V inputs and drives 3.3-V compatible loads - eliminating external level shifters in bridging applications like legacy peripheral interfacing. This capability is explicitly documented in the Recommended Operating Conditions table for SN74LV8151DGVRE4.

What package type is used for the SN74LV8151DGVRE4?

The SN74LV8151DGVRE4 uses a 24-pin TVSOP (Thin Very Small Outline Package) with 0.4-mm lead pitch, 4.4-mm body width, and 1.2-mm maximum height. This compact, fine-pitch package supports high-density PCB layouts and automated SMT assembly, and is RoHS-compliant with NIPDAU lead finish and Moisture Sensitivity Level 1 (260°C peak reflow). Package dimensions and land patterns are detailed in the DGV0024A outline drawing referenced in the SN74LV8151DGVRE4 packaging addendum.