onsemi DM74ALS03BN

Overview

DM74ALS03BN from Fairchild Semiconductor is a quad 2-input NAND gate IC with open-collector outputs, designed for wired-AND logic and level translation in TTL-compatible systems. It operates over 4.5–5.5 V supply, delivers 8 mA sink current per output, and guarantees propagation delays of 3–50 ns (tPHL/tPLH) at 50 pF load across 0°C to +70°C.

For engineers reviewing the DM74ALS03BN datasheet, pinout, applications, or equivalent options, key selection factors include open-collector drive capability, guaranteed AC performance across full temperature/voltage range, compatibility with Schottky and LS-TTL logic families, and PDIP-14 package suitability for prototyping and through-hole production.

Technical Context

This device implements four independent NAND gates using advanced oxide-isolated, ion-implanted Schottky TTL process technology. Each output lacks an internal pull-up, requiring external resistors to establish HIGH-level logic states-enabling wired-AND bus structures and voltage-level interfacing between dissimilar logic families.

Switching characteristics are specified at 50 pF capacitive load and guaranteed over full recommended operating conditions (VCC = 4.5–5.5 V, TA = 0°C to +70°C). Input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) and output saturation (VOL = 0.4 V max at IOL = 4 mA) ensure robust noise margins and interoperability with standard TTL inputs.

Key Specifications

Pinout & Package

DM74ALS03BN is housed in a 14-lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" wide, with standard through-hole mounting and 0.100" lead pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NAND gate applications.

Compared with SN74ALS03N and DM74ALS03M, the DM74ALS03BN offers identical logic performance and DC/AC characteristics but is uniquely suited for hand-soldered prototypes, breadboard evaluation, and legacy through-hole manufacturing due to its PDIP-14 footprint and long-standing availability in that package.

Availability

DM74ALS03BN is available at Aetrix Electronics and suitable for industrial control bus design, legacy system logic upgrades, and LED driver interface implementation requiring stable component supply and long-term obsolescence management.

Supply support for DM74ALS03BN 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 semiconductors, acquired by ON Semiconductor in 2016; its legacy TTL logic portfolio remains widely supported and distributed.

The DM74ALS03BN belongs to the 74ALS (Advanced Low-Power Schottky) logic family, engineered to deliver superior speed-power trade-offs over standard LS-TTL while maintaining full compatibility with earlier TTL generations.

FAQ

What is the maximum sink current per output of the DM74ALS03BN?

The DM74ALS03BN guarantees a minimum LOW-level output current (IOL) of 8 mA per open-collector output at VO = 0.4 V, enabling direct drive of multiple TTL inputs or indicator LEDs without external buffering. This rating is validated across the full operating temperature and supply voltage range (0°C to +70°C, VCC = 4.5–5.5 V), ensuring consistent performance in industrial environments where the DM74ALS03BN is commonly deployed.

Does the DM74ALS03BN require external pull-up resistors?

Yes, the DM74ALS03BN features open-collector outputs and cannot assert a HIGH logic level without external pull-up resistors. Each output must be connected to a positive supply (typically VCC or another logic rail) via a resistor-value selected based on total connected load, desired rise time, and fan-out requirements. This architecture enables wired-AND functionality and voltage-level translation, core use cases for the DM74ALS03BN in bus and interface applications.

Is the DM74ALS03BN pin-compatible with older TTL NAND gates?

Yes, the DM74ALS03BN is functionally and pin-for-pin compatible with the 74S03 and 74LS03 quad 2-input NAND gate families. Its 14-pin PDIP layout matches industry-standard pin assignments: inputs on pins 1,2,4,5,8,9,11,12 and open-collector outputs on pins 3,6,10,13. This allows seamless substitution in legacy designs without PCB modification-making the DM74ALS03BN a preferred upgrade path for reliability and power efficiency in existing systems.

What is the recommended operating temperature range for the DM74ALS03BN?

The DM74ALS03BN is rated for operation from 0°C to +70°C ambient temperature-the industrial grade range. All electrical specifications, including propagation delays (tPHL/tPLH), output voltage levels (VOL/VOH), and input thresholds (VIH/VIL), are guaranteed within this range. This makes the DM74ALS03BN suitable for non-automotive industrial equipment, test instruments, and commercial control systems where extended thermal stability is required but automotive-grade qualification is not necessary.

Can the DM74ALS03BN be used for level translation between 5 V and 3.3 V logic?

Yes, the DM74ALS03BN can perform unidirectional 5 V-to-3.3 V level translation by connecting its open-collector outputs to a 3.3 V pull-up resistor instead of 5 V. When the output is LOW, it pulls the node to <0.4 V (TTL-compatible LOW); when HIGH, the external 3.3 V rail defines the logic HIGH level. This avoids overvoltage stress on 3.3 V inputs and is a documented application for the DM74ALS03BN in mixed-voltage system interfaces.