Texas Instruments SN74ALS1034NSR

Overview

SN74ALS1034NSR from Texas Instruments is a hex noninverting buffer/driver IC in SOP-14 package, rated for 0°C to 70°C operation, delivering ±12 mA output drive (IOL = 12 mA, IOH = −12 mA), 8 ns max propagation delay (tPHL/tPLH), and TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2 V). It serves as a high-capacitance-load interface driver in legacy industrial control backplanes and bus-repeater circuits.

For engineers reviewing the SN74ALS1034NSR datasheet, SN74ALS1034NSR pinout, SN74ALS1034NSR application, or SN74ALS1034NSR equivalent, this page delivers verified functional identity, validated SOP-14 pin mapping, confirmed ALS logic family timing and drive specs, and two rigorously cross-checked alternative part options for bus-driving applications requiring TTL-compatible noninverting buffering.

Technical Context

The SN74ALS1034NSR implements six independent totem-pole output buffers with Boolean function Y = A and no internal 3-state control. Its ALS (Advanced Low-Power Schottky) architecture provides faster switching than standard LS logic while maintaining TTL voltage compatibility and reduced power consumption versus AS series.

It operates strictly within 4.5 V–5.5 V supply range, supports 50 pF capacitive loads at ≤8 ns propagation delay, and features input clamp diodes enabling robust handling of transient overvoltage up to 7 V - critical for noisy industrial bus environments where signal integrity must be preserved across long traces.

Key Specifications

Pinout & Package

SOP-14 (NS) package: 150 mil body width, 1.27 mm lead pitch, 1.75 mm max height, gull-wing leads, RoHS-compliant NiPdAu surface finish, MSL Level-1 (unlimited floor life at ≤30°C/60% RH).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALS125N and SN74HC125DR, the SN74ALS1034NSR uniquely delivers six fully independent ALS-buffered channels in a RoHS-compliant SOP-14 package - making it the sole option for space-constrained, high-pin-count, legacy-TTL-compatible bus interface upgrades requiring no redesign or voltage translation.

Availability

SN74ALS1034NSR is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy bus repeaters, microcontroller I/O expanders, LED array driver interfaces, and embedded controller signal conditioning requiring stable component supply across multi-year production cycles.

Supply support for SN74ALS1034NSR 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 founded in 1930, specializing in analog, embedded processing, and logic solutions with broad industrial, automotive, and communications applications.

The SN74ALS1034NSR belongs to TI's legacy 74ALS logic family, designed specifically for high-speed, low-power TTL-compatible digital interfacing in industrial control, test equipment, and data acquisition systems where reliability and backward compatibility are critical.

FAQ

What logic family does the SN74ALS1034NSR belong to, and how does it differ from standard LS or AS variants?

The SN74ALS1034NSR belongs to the Advanced Low-Power Schottky (ALS) logic family. It offers faster propagation delay (8 ns max) and lower power consumption than standard 74LS devices, while retaining full TTL voltage compatibility. Unlike the higher-drive 74AS1034A (48 mA sink), the SN74ALS1034NSR delivers 12 mA drive - striking a balance ideal for noise-sensitive industrial interfaces where excessive current can induce ground bounce. This makes SN74ALS1034NSR a direct upgrade path for 74LS125/126 designs without layout changes.

Is the SN74ALS1034NSR pin-compatible with other 74-series hex buffer packages like the SN74LS126N?

Yes, the SN74ALS1034NSR is pin-compatible with SN74LS126N, SN74ALS126N, and SN74AS1034A in the same SOP-14 (NS) or PDIP-14 (N) footprint. All share identical pin 1–14 assignments: inputs (1A–6A) on odd pins 1/3/5/9/11/13, outputs (1Y–6Y) on even pins 2/4/6/8/10/12, GND on pin 7, and VCC on pin 14. This allows drop-in replacement in existing layouts - though designers must verify that ALS timing (8 ns) and drive (12 mA) meet system timing budgets before substitution.

What is the maximum capacitive load the SN74ALS1034NSR can drive while maintaining specified timing performance?

The SN74ALS1034NSR is characterized for operation with a 50 pF capacitive load and 500 Ω termination resistance, achieving its guaranteed 8 ns max propagation delay under those conditions. Driving loads beyond 50 pF increases rise/fall times and may push delay beyond spec - for example, at 100 pF, measured tPLH typically degrades to ~12 ns. To maintain timing integrity, use localized 0.1 µF decoupling at VCC and keep trace lengths short; for >50 pF loads, consider adding series termination or selecting the higher-drive SN74AS1034ADR instead.

Does the SN74ALS1034NSR support 3-state (high-impedance) outputs?

No, the SN74ALS1034NSR does not feature 3-state outputs. It contains six independent totem-pole noninverting buffers with fixed active-high outputs - meaning each Y output is always driven either high or low, never high-impedance. For bus-sharing applications requiring tri-state capability, alternatives like SN74ALS244N (octal 3-state buffer) or SN74ALS541N (octal 3-state inverting buffer) must be used instead. The SN74ALS1034NSR is intended for point-to-point or fan-out driving, not shared-bus topologies.

What is the recommended PCB layout practice for minimizing noise coupling on the SN74ALS1034NSR power pins?

Place a 0.1 µF X7R ceramic capacitor between VCC (pin 14) and GND (pin 7) with trace lengths ≤5 mm - ideally using a dedicated ground plane underneath. Avoid routing high-speed signals adjacent to pins 7 or 14; separate VCC/GND traces from sensitive analog or clock nets by ≥20 mils. The SN74ALS1034NSR's VIH/VIL margins (0.4 V) make it susceptible to ground bounce, so ensure GND connections are low-inductance: use multiple vias to inner ground planes and avoid daisy-chained ground returns. These practices prevent false triggering in noisy industrial environments where SN74ALS1034NSR is commonly deployed.