Texas Instruments SN74AUC1G19DRLR

Overview

SN74AUC1G19DRLR from Texas Instruments is a 1-of-2 decoder/demultiplexer IC operating at 0.8 V–2.7 V supply, optimized for 1.65 V–1.95 V use with ±8-mA output drive at 1.8 V, 3 ns max propagation delay, and Ioff partial-power-down support. It routes buffered input A to true (Y0) and complemented (Y1) outputs when enable (E) is low, used in portable audio, SSDs, and embedded PCs.

For engineers reviewing the SN74AUC1G19DRLR datasheet, SN74AUC1G19DRLR pinout, SN74AUC1G19DRLR application, or SN74AUC1G19DRLR equivalent, key selection criteria include sub-1-V operability, 3.6-V I/O tolerance for mixed-mode interfacing, latch-up immunity (>100 mA), and NanoFree™ SOT-5X3 package compatibility with high-density PCB layouts.

Technical Context

The SN74AUC1G19DRLR implements positive-logic decoding with active-low enable control: when E = L, Y0 mirrors A and Y1 is its inverse; when E = H, both outputs go high-impedance. Its design supports dynamic voltage scaling across 0.8 V–2.7 V while maintaining guaranteed timing performance down to 1.65 V.

Internal Ioff circuitry disables outputs during power-down to prevent backflow current, enabling safe hot-insertion and partial-power-down system architectures. The device uses standard CMOS logic thresholds scaled for sub-1.8-V operation, with VIH/VIL specified per VCC range (e.g., 0.65×VCC min at 1.1–1.95 V).

Key Specifications

Pinout & Package

SOT-5X3 (DRL) package: 1.60 mm × 1.20 mm body, 0.6 mm max height, 6-pin surface-mount with gull-wing leads. Pin 1 marked via index area; JEDEC MO-293 UAAD-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar decoder/demultiplexer applications.

Compared with SN74LVC1G19DRLR and NC7SZ19P5X, the SN74AUC1G19DRLR uniquely delivers verified sub-1-V functionality, tighter 3 ns tpd at 1.8 V, and integrated NanoFree™ packaging-making it optimal for next-generation portable and energy-constrained embedded systems.

Availability

SN74AUC1G19DRLR is available at Aetrix Electronics and suitable for portable audio, solid-state drive control, and embedded PC power sequencing requiring stable component supply across extended temperature ranges (–40°C to +85°C).

Supply support for SN74AUC1G19DRLR 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 components.

The SN74AUC1G19DRLR belongs to TI's AUC Sub-1-V Little Logic family, engineered for ultra-low-voltage digital signal routing in battery-powered and thermally constrained devices.

FAQ

What is the minimum operating voltage for the SN74AUC1G19DRLR?

The SN74AUC1G19DRLR operates down to 0.8 V VCC, with guaranteed functionality across the full 0.8 V–2.7 V range. Its design is specifically optimized for 1.65 V–1.95 V operation, where timing and drive performance are fully characterized - including 3 ns max tpd at 1.8 V. Below 1.65 V, parameters such as VOL and VOH remain valid per datasheet electrical characteristics tables.

Does the SN74AUC1G19DRLR support hot-swap or partial-power-down operation?

Yes, the SN74AUC1G19DRLR includes Ioff circuitry that disables outputs when VCC = 0 V, preventing damaging current backflow from live I/O traces into the unpowered device. This feature is explicitly validated per JESD78 and enables safe use in systems with staggered power sequencing, such as SSDs and embedded PCs - a capability confirmed in the SN74AUC1G19DRLR datasheet Section 3 and Table 1 functional modes.

What package type does the SN74AUC1G19DRLR use, and what are its dimensions?

The SN74AUC1G19DRLR uses the SOT-5X3 (DRL) package: a 6-pin gull-wing surface-mount outline measuring 1.60 mm × 1.20 mm with 0.6 mm maximum height. It complies with JEDEC MO-293 Variation UAAD and features NanoFree™ construction - meaning the silicon die serves directly as the package substrate, eliminating wire bonds and reducing parasitic inductance.

Can the SN74AUC1G19DRLR interface directly with 3.3-V logic systems?

Yes, the SN74AUC1G19DRLR has 3.6-V tolerant I/Os, allowing direct connection to 3.3-V signal lines regardless of its own VCC (0.8–2.7 V). Inputs accept up to 3.6 V, and outputs drive to VCC levels while tolerating 3.6 V on pins - eliminating need for external level shifters in mixed-voltage designs like HDTV mainboards or embedded PCs with legacy peripherals.

How does the enable (E) pin function in the SN74AUC1G19DRLR?

The E pin is an active-low enable: when E = L, the device decodes input A to produce Y0 = A and Y1 = Ā; when E = H, both Y0 and Y1 enter high-impedance state. This behavior is defined in the SN74AUC1G19DRLR function table (Table 1) and supports bus isolation, power gating, and dynamic signal routing - critical in portable audio and SSD applications where unused paths must be electrically disconnected.