Texas Instruments SN74ALS35ADRE4

Overview

SN74ALS35ADRE4 from Texas Instruments is a 14-pin SOIC-packaged hex noninverting buffer with open-collector outputs, operating at 4.5–5.5 V supply, delivering 8 mA low-level output current and 20–50 ns propagation delay (tPLH), used in wired-OR bus interfacing and level-shifting applications.

For engineers reviewing the SN74ALS35ADRE4 datasheet, SN74ALS35ADRE4 pinout, SN74ALS35ADRE4 application, or SN74ALS35ADRE4 equivalent, key selection criteria include open-collector drive capability, TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V), temperature range (0°C to 70°C), and SOIC-14 package compatibility with legacy 74ALS logic systems.

Technical Context

The SN74ALS35ADRE4 implements six independent noninverting buffers (Y = A) with open-collector outputs requiring external pullup resistors. Its architecture supports active-low wired-OR and active-high wired-AND logic sharing across multiple devices on a common bus line.

It operates strictly within the ALS (Advanced Low-Power Schottky) family specifications: VIH = 2 V min, VIL = 0.8 V max, VOL = 0.4 V max at IOL = 4 mA, and tPHL/tPLH asymmetry (2–14 ns / 20–50 ns) reflects optimized low-to-high transition timing for bus arbitration.

Key Specifications

Pinout & Package

SN74ALS35ADRE4 is housed in a 14-pin SOIC (D) package, 3.9 mm wide, 8.75 mm long, 1.75 mm max height, with 1.27 mm pitch, RoHS-compliant NiPdAu lead finish, and MSL Level-1 rating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex noninverting buffer applications.

Compared with SN74LS35N and SN74AHCT125DR, the SN74ALS35ADRE4 uniquely combines open-collector drive, ALS-speed propagation, and TTL-compatible thresholds in a single SOIC-14 package-making it irreplaceable for legacy bus arbitration and mixed-voltage interface designs requiring true wired logic.

Availability

SN74ALS35ADRE4 is available at Aetrix Electronics and suitable for industrial bus arbitration, legacy system level-shifting, and parallel data bus isolation requiring stable component supply and long-term obsolescence management.

Supply support for SN74ALS35ADRE4 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and logic solutions with global manufacturing and quality infrastructure.

The SN74ALS35ADRE4 belongs to TI's 74ALS advanced low-power Schottky logic family, designed specifically for high-reliability commercial systems needing improved speed over LS logic while maintaining TTL compatibility and noise immunity.

FAQ

What is the function of SN74ALS35ADRE4?

The SN74ALS35ADRE4 is a hex noninverting buffer with open-collector outputs, implementing six independent Y = A logic functions. Each channel requires an external pullup resistor to generate HIGH-level outputs and supports wired-OR or wired-AND bus configurations. It is not a 3-state device, nor does it provide level translation without external components.

Does SN74ALS35ADRE4 support 3-state operation?

No, SN74ALS35ADRE4 does not support 3-state operation. It features only open-collector outputs that sink current when LOW and float when HIGH (requiring external pullup). Devices such as SN74ALS244 or SN74ALS573 provide true 3-state functionality; SN74ALS35ADRE4 is strictly a buffered wired-logic driver.

What is the maximum sink current per output of SN74ALS35ADRE4?

The SN74ALS35ADRE4 guarantees 8 mA low-level output current (IOL) per channel under recommended operating conditions (VCC = 4.5–5.5 V, TA = 0°C to 70°C). At IOL = 4 mA, VOL is specified at 0.4 V max; at 8 mA, VOL rises to 0.5 V max - critical for ensuring valid LOW-level recognition in downstream TTL inputs.

Can SN74ALS35ADRE4 be used with a 3.3 V microcontroller?

SN74ALS35ADRE4 is not 3.3 V compatible: its inputs require VIH ≥ 2 V but are rated for VI up to 7 V, and it must be powered from 4.5–5.5 V. A 3.3 V GPIO may fail to meet VIH reliably. For 3.3 V systems, use SN74LVC1G07 or SN74AHC1G07 instead; SN74ALS35ADRE4 is intended for 5 V TTL/ALS environments only.

What package type is SN74ALS35ADRE4 supplied in?

SN74ALS35ADRE4 is supplied in a 14-pin SOIC (D) package with 1.27 mm pitch, 3.9 mm body width, and 1.75 mm max height. It is RoHS-compliant with NiPdAu lead finish and MSL Level-1 rating. The 'RE4' suffix denotes tape-and-reel packaging per TI's standard ordering convention for SOIC devices.