Texas Instruments SN74ALS1035NS

Overview

SN74ALS1035NS from Texas Instruments is a hex noninverting buffer IC with open-collector outputs, designed for wired-OR/AND logic interfacing in TTL-compatible systems. It operates at 4.5–5.5 V, delivers 24 mA low-level output current, exhibits 12 ns max propagation delay (tPHL), and supports 0°C to 70°C ambient operation in a 14-pin SOIC package.

For engineers reviewing the SN74ALS1035NS datasheet, SN74ALS1035NS pinout, SN74ALS1035NS application, or SN74ALS1035NS equivalent, this device is selected for level translation, bus driving, and active-low logic combining where pullup-dependent output behavior and TTL input compatibility are required.

Technical Context

This device implements six independent Boolean Y = A functions using bipolar ALS (Advanced Low-power Schottky) technology. Each output is open-collector, requiring external pullup resistors and enabling wired-logic connections without additional gates. Input thresholds meet standard TTL levels (VIL ≤ 0.8 V, VIH ≥ 2 V).

Propagation delays are specified under loaded conditions (CL = 50 pF, RL = 680 Ω), with tPHL ≤ 12 ns and tPLH ≤ 30 ns across temperature. Power consumption is characterized by ICCL = 14 mA max and ICCH = 6 mA max at VCC = 5.5 V, reflecting ALS-family efficiency versus standard LS.

Key Specifications

Pinout & Package

SN74ALS1035NS uses a 14-pin small-outline integrated circuit (SOIC) package (NS suffix), with 3.9 mm body width and standard JEDEC MS-012AC footprint. Pin spacing is 1.27 mm, and thermal resistance θJA is 86°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALS05N and SN74LS367N, the SN74ALS1035NS uniquely combines noninverting logic, open-collector outputs, and ALS-speed/power tradeoffs-making it optimal for legacy TTL bus arbitration, level translation, and discrete load driving where wired logic reduces component count.

Availability

SN74ALS1035NS is available at Aetrix Electronics and suitable for industrial control panels, legacy test equipment upgrades, and embedded instrumentation requiring stable component supply and long-term obsolescence mitigation.

Supply support for SN74ALS1035NS 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 for industrial, automotive, and communications markets.

The SN74ALS1035NS belongs to TI's legacy 74ALS logic family, engineered for high-speed, low-power TTL-compatible digital interfacing in systems where reliability and backward compatibility are critical.

FAQ

What is the maximum sink current per output of the SN74ALS1035NS?

The SN74ALS1035NS supports up to 24 mA low-level output current (IOL) per channel at VCC = 4.5 V, enabling direct drive of multiple TTL inputs or moderate-current loads like LEDs. This value is tested and guaranteed across the full 0°C to 70°C operating range, making SN74ALS1035NS suitable for robust bus termination and indicator driving without external amplification.

Does the SN74ALS1035NS require external pullup resistors on its outputs?

Yes, the SN74ALS1035NS features open-collector outputs and cannot source current - external pullup resistors are mandatory to establish a valid HIGH logic level. Typical values range from 1 kΩ to 10 kΩ depending on bus capacitance and speed requirements; SN74ALS1035NS output saturation voltage remains ≤0.4 V at 12 mA, ensuring clean LOW transitions.

Is the SN74ALS1035NS pin-compatible with other 74-series hex buffers?

The SN74ALS1035NS shares the standard 14-pin SOIC (NS) pinout with SN74ALS05N and SN74LS367N - inputs and outputs align positionally - but functional differences exist: SN74ALS05N inverts, and SN74LS367N uses 3-state, not open-collector. Direct replacement requires verifying logic polarity and output architecture; SN74ALS1035NS is not a drop-in substitute without design validation.

What is the recommended supply voltage range for stable operation of the SN74ALS1035NS?

The SN74ALS1035NS is rated for reliable operation from 4.5 V to 5.5 V DC. Operation below 4.5 V risks marginal input threshold recognition and increased propagation delay; above 5.5 V exceeds absolute maximum ratings and may cause permanent damage. For best noise immunity and timing consistency, 5.0 V ±5% is the optimal nominal supply for SN74ALS1035NS in commercial applications.

Can the SN74ALS1035NS be used to implement wired-AND logic?

Yes - the open-collector outputs of the SN74ALS1035NS allow direct connection to a common pullup resistor, enabling active-high wired-AND functionality: the combined output is HIGH only when all contributing SN74ALS1035NS outputs are HIGH (i.e., all transistors off). This eliminates discrete diodes or gates, and SN74ALS1035NS maintains timing integrity due to matched propagation characteristics across all six channels.