onsemi DM74ALS1005MX

Overview

DM74ALS1005MX from Fairchild Semiconductor is a hex inverting driver IC with six independent open-collector outputs, designed for TTL-level logic inversion and wired-OR interfacing. It operates at VCC = 4.5–5.5 V, delivers IOL = 24 mA per output, supports tPLH/tPHL ≤ 30/10 ns (CL = 50 pF), and targets bus buffering and level translation in industrial control systems.

For engineers reviewing the DM74ALS1005MX datasheet, pinout, applications, or equivalent options, key selection criteria include open-collector drive strength, guaranteed AC performance across 0°C to +70°C, compatibility with standard TTL load networks, and SOIC-14 packaging for space-constrained PCB layouts.

Technical Context

This device implements six identical inverting buffer stages using advanced oxide-isolated, ion-implanted Schottky TTL technology. Each output requires external pull-up resistors and sinks up to 24 mA while maintaining VOL ≤ 0.4 V at IOL = 12 mA.

It is functionally and pin-for-pin compatible with standard Schottky and low-power Schottky TTL hex inverters (e.g., 74S05, 74LS05), with improved propagation delay (tPHL ≤ 10 ns) and tighter AC specifications guaranteed over full temperature and supply voltage range.

Key Specifications

Pinout & Package

DM74ALS1005MX is supplied in a 14-lead SOIC package (JEDEC MS-012, 0.150" narrow body, Package Number M14A), with thermal resistance θJA = 106.5°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex inverting driver applications.

Compared with SN74ALS05DR and MC74ALS05N, the DM74ALS1005MX offers identical logic function and SOIC-14 packaging with verified 24 mA drive and 0°C–70°C qualification-making it optimal for volume SMT deployment where thermal management and board space are constrained.

Availability

DM74ALS1005MX is available at Aetrix Electronics and suitable for industrial bus buffering, LED display driving, level translation interfaces, and TTL-to-relay driver circuits requiring stable component supply and long-term obsolescence mitigation.

Supply support for DM74ALS1005MX 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

Fairchild Semiconductor was a leading designer of analog and mixed-signal ICs, acquired by ON Semiconductor in 2016; its legacy TTL and ALS logic families remain widely deployed in industrial and automotive systems.

The DM74ALS1005MX belongs to Fairchild's Advanced Low-Power Schottky (ALS) logic series, engineered for high-speed, low-power digital interfacing in commercial-temperature embedded control applications.

FAQ

What is the maximum output sink current per channel for DM74ALS1005MX?

The DM74ALS1005MX guarantees a minimum output sink current (IOL) of 24 mA per channel at VOL ≤ 0.4 V with VCC = 4.5 V and IOL = 12 mA. This rating is validated across the full operating temperature range (0°C to +70°C) and supports direct driving of TTL inputs or indicator LEDs without external buffering. The DM74ALS1005MX maintains this performance under worst-case supply and temperature conditions.

Does DM74ALS1005MX require external pull-up resistors on its outputs?

Yes, DM74ALS1005MX features open-collector outputs and requires external pull-up resistors for HIGH-level logic assertion. The datasheet provides pull-up resistor equations based on total IOH, IIH, and IIL of connected loads. Typical values range from 1.0 kΩ to 4.7 kΩ depending on bus capacitance and fan-out count. Without pull-ups, outputs remain floating in the HIGH state and cannot drive standard TTL or CMOS inputs reliably. The DM74ALS1005MX relies entirely on external components to define the HIGH voltage level.

Is DM74ALS1005MX pin-compatible with older 74LS05 or 74S05 devices?

Yes, DM74ALS1005MX is functionally and pin-for-pin compatible with both 74LS05 and 74S05 hex inverters. Its pinout matches standard 14-lead SOIC layouts for these families, supporting drop-in replacement in existing designs. Electrical differences-including lower power consumption, improved speed (tPHL ≤ 10 ns), and tighter AC specs across temperature-do not affect physical layout. The DM74ALS1005MX retains identical input/output placement and GND/VCC positioning as its predecessors.

What is the operating temperature range specified for DM74ALS1005MX?

The DM74ALS1005MX is rated for commercial operation from 0°C to +70°C ambient temperature. This range is explicitly defined in the "Recommended Operating Conditions" table and applies to all guaranteed DC and AC parameters, including propagation delay, VOL, and IOL. The device's absolute maximum storage temperature extends to −65°C to +150°C, but functional operation outside 0°C–70°C is not characterized or warranted. All performance claims for the DM74ALS1005MX assume compliance with this temperature envelope.

Can DM74ALS1005MX be used in place of DM74ALS05A?

Yes, DM74ALS1005MX is the driver version of DM74ALS05A and shares identical logic function, pinout, and electrical specifications except for enhanced output drive capability. While DM74ALS05A is rated for 8 mA IOL, DM74ALS1005MX delivers 24 mA-making it suitable for heavier fan-out or higher-current loads like relays or LEDs. Both operate at the same VCC range and temperature, and the DM74ALS1005MX can replace DM74ALS05A in any application where increased sink current is beneficial or required.