Texas Instruments SN74LVC1G18DRYR

Overview

SN74LVC1G18DRYR from Texas Instruments is a 1-of-2 noninverting demultiplexer with 3-state deselected outputs, designed for 1.65-V to 5.5-V V_CC operation. It routes input A to Y0 (when S = LOW) or Y1 (when S = HIGH), supports ±24-mA output drive at 3.3 V, achieves 3.4 ns max propagation delay at 3.3 V, and operates across –40°C to +125°C - enabling precise signal routing in high-density data center switches and baseband units.

For engineers reviewing the SN74LVC1G18DRYR datasheet, SN74LVC1G18DRYR pinout, SN74LVC1G18DRYR application, or SN74LVC1G18DRYR equivalent, key selection criteria include its I_off-enabled partial-power-down capability, over-voltage tolerant inputs (up to 5.5 V), balanced CMOS 3-state outputs, and NanoFree™ 1.45 mm × 1.00 mm SON-6 package optimized for space-constrained industrial monitors and Wi-Fi access points.

Technical Context

This device implements a single-channel 1-of-2 demultiplexer with noninverting logic and independent 3-state control via the S input. Its functional modes are fully defined by the truth table: S = LOW enables Y0 (passing A), disables Y1 (high-Z); S = HIGH enables Y1, disables Y0. No internal latching or clocking is present - operation is purely combinatorial and level-sensitive.

The I_off circuitry actively disables both outputs during power-down, limiting back-drive current to ±10 µA, while standard CMOS inputs tolerate input voltages up to 5.5 V regardless of V_CC. Output drive strength scales with supply voltage (e.g., ±24 mA at 3.3 V, ±32 mA at 4.5 V), and switching performance is characterized across –40°C to +125°C with CL = 30–50 pF loads.

Key Specifications

Pinout & Package

NanoFree™ SON-6 package (1.45 mm × 1.00 mm body, 0.5-mm pitch), using the die as the package - eliminates bond wires and mold compound for minimal parasitic inductance and thermal resistance (R_θJA = 306.7°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 1-of-2 demultiplexer applications.

Compared with SN74LVC1G19DRYR and 74LVC1G18GW,125, the SN74LVC1G18DRYR uniquely combines noninverting logic, NanoFree™ miniaturization, and best-in-class thermal resistance - making it optimal for next-generation wireless infrastructure and compact industrial HMI designs where polarity fidelity and board area are critical.

Availability

SN74LVC1G18DRYR is available at Aetrix Electronics and suitable for data center switches, baseband units, and Wi-Fi access points requiring stable component supply, extended temperature support, and high-volume manufacturability.

Supply support for SN74LVC1G18DRYR 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 logic solutions, with over 90 years of innovation in high-reliability electronic components.

The SN74LVC1G18DRYR belongs to TI's LVC low-voltage CMOS logic family - engineered for interoperability across 1.65–5.5-V systems, low dynamic power, and robust operation in industrial, communications, and automotive applications.

FAQ

What is the logic function implemented by the SN74LVC1G18DRYR?

The SN74LVC1G18DRYR is a 1-of-2 noninverting demultiplexer: when select input S is LOW, input A is passed to output Y0 while Y1 enters high-impedance; when S is HIGH, A is passed to Y1 while Y0 goes high-Z. This function is strictly combinatorial - no internal storage or clocking is involved. The SN74LVC1G18DRYR does not invert A at either output.

Can the SN74LVC1G18DRYR interface 5-V signals while operating at 1.8 V V_CC?

Yes. The SN74LVC1G18DRYR features over-voltage tolerant inputs: A and S accept voltages up to 5.5 V regardless of V_CC, enabling direct connection to 5-V controllers without external level shifters. This capability is verified across the full –40°C to +125°C range and is specified in the Recommended Operating Conditions table of the SN74LVC1G18DRYR datasheet.

Does the SN74LVC1G18DRYR support hot-swap or partial-power-down operation?

Yes. The SN74LVC1G18DRYR incorporates I_off circuitry that places both inputs and outputs in high-impedance states when V_CC is removed or near-zero, limiting leakage to ±10 µA. This feature enables safe live insertion, back-drive protection, and controlled power sequencing - confirmed by JEDEC JESD78 Class II latch-up testing (>100 mA) and documented in the SN74LVC1G18DRYR Feature Description section.

What is the maximum capacitive load the SN74LVC1G18DRYR can drive while meeting timing specs?

The SN74LVC1G18DRYR is characterized for C_L = 30 pF and 50 pF loads across temperature and voltage ranges, with max t_pd = 3.4 ns at 3.3 V. TI recommends keeping total load ≤70 pF for reliable operation - exceeding this may increase propagation delay and output transition time beyond datasheet limits. Layout best practices (short traces, proper decoupling) are essential to maintain SN74LVC1G18DRYR timing integrity.

Is the NanoFree™ SON-6 package of the SN74LVC1G18DRYR compatible with standard reflow profiles?

Yes. The SN74LVC1G18DRYR NanoFree™ SON-6 package (1.45 mm × 1.00 mm) is qualified for standard lead-free reflow per IPC/JEDEC J-STD-020. Its die-as-package construction eliminates wire bonds and mold compound, resulting in superior thermal cycling reliability and compatibility with automated SMT assembly. Thermal metrics (R_θJA = 306.7°C/W) are published in the SN74LVC1G18DRYR datasheet for thermal design validation.