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onsemi DM74ALS03BMX
- Part No.:
- DM74ALS03BMX
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DM74ALS03BMX.pdf
- Description:
- IC GATE NAND 4CH 2-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,473
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Product details
Overview
DM74ALS03BMX 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 at VCC = 4.5–5.5 V, delivers IOL = 8 mA sink capability, features tPLH/tPHL = 3–50 ns propagation delays (CL = 50 pF), and is rated for 0°C to +70°C industrial temperature range.
For engineers reviewing the DM74ALS03BMX datasheet, pinout, applications, or equivalent options, key selection considerations include open-collector drive strength, guaranteed AC performance across full VCC/temperature range, compatibility with Schottky and LS-TTL logic families, and SOIC-14 package thermal resistance (θJA = 116.0°C/W).
Technical Context
This device implements four independent NAND gates using advanced oxide-isolated, ion-implanted Schottky TTL process technology. Each output is open-collector, requiring external pull-up resistors - enabling wired-AND bus structures and mixed-voltage interfacing.
Switching characteristics are fully specified at CL = 50 pF and guaranteed over the full recommended operating range (VCC = 4.5–5.5 V, TA = 0–70°C). Input thresholds meet standard TTL levels: VIH ≥ 2.0 V, VIL ≤ 0.8 V, with IIL = −0.1 mA and IIH = 20 µA at worst-case conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures robust operation under noisy or marginally regulated 5 V rails |
| IOL (max) | 8 mA - supports direct driving of LEDs, relays, or TTL inputs without buffer stages |
| tPLH / tPHL | 3 ns (typ) to 50 ns (max) - enables reliable timing in 20 MHz+ synchronous logic designs |
| VIH / VIL | 2.0 V / 0.8 V - guarantees interoperability with standard TTL and LS-TTL families |
| θJA (SOIC) | 116.0°C/W - defines thermal derating limit for continuous operation at ambient up to 70°C |
| IOH (max) | 100 µA - specifies maximum leakage when output is HIGH (open-circuit state) |
| ICC (Outputs LOW) | 1.62–3.0 mA - determines total supply current in active-bus configurations with multiple gates sinking |
Pinout & Package
DM74ALS03BMX is housed in a 14-lead Small Outline Integrated Circuit (SOIC) package per JEDEC MS-012, 0.150" narrow body (Package Number M14A), with standard dual-in-line pin spacing and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 8, 9, 11, 12 | Input (A/B of each NAND) | Standard TTL-compatible inputs; VIH ≥ 2.0 V, VIL ≤ 0.8 V; require no external bias |
| 3, 6, 10, 13 | Open-collector Output (Y) | Active-low outputs requiring external pull-up; sink up to 8 mA; no internal pull-up |
| 7 | GND | Ground reference for all logic and power paths; must be low-impedance connection |
| 14 | VCC | Positive supply input; decoupling capacitor (0.1 µF) required adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Open-collector outputs | Enables wired-AND bus arbitration and level-shifting between 5 V TTL and lower-voltage logic domains |
| Guaranteed AC specs at 50 pF | Ensures predictable timing in real-world PCB traces and fan-out loads without derating |
| Full temperature/VCC rating | Validates logic behavior across entire industrial range (0–70°C, 4.5–5.5 V) - no corner-case validation needed |
| Pin-for-pin compatible with 74S03/74LS03 | Allows drop-in replacement in legacy TTL designs without layout or firmware changes |
| Oxide-isolated Schottky process | Delivers improved noise immunity and reduced switching transients vs. standard bipolar TTL |
Applications
| Industrial Control Bus | Legacy System Logic Upgrade |
|---|---|
Use Scenario: Wired-AND interrupt request lines shared across multiple microcontroller peripherals in PLC backplanes. IC Role / Device Role / Timing Role: DM74ALS03BMX provides open-collector NAND gating to combine active-low IRQ signals onto a single shared line. Use Value: Eliminates need for discrete diodes or additional logic; leverages 8 mA sink capability to drive bus capacitance and multiple inputs reliably. | Use Scenario: Replacing obsolete 74S03 in aging test equipment where board space and pinout are fixed. IC Role / Device Role / Timing Role: DM74ALS03BMX serves as functionally identical, lower-power, higher-speed substitute with same SOIC-14 footprint. Use Value: Reduces ICC by ~40% vs. 74S03 while improving tPHL by 2× - extends system uptime and lowers thermal load. |
| LED Driver Interface | TTL-to-5 V CMOS Level Translation |
Use Scenario: Driving common-anode LED arrays from microcontroller GPIOs with current limiting via pull-up resistor. IC Role / Device Role / Timing Role: DM74ALS03BMX acts as active-low driver stage - output sinks LED current when logic condition is met. Use Value: Uses built-in 8 mA sink rating to directly drive indicator LEDs without external transistor; simplifies BOM. | Use Scenario: Interfacing 5 V TTL outputs to 5 V CMOS inputs requiring higher VIH threshold (≥ 3.5 V). IC Role / Device Role / Timing Role: DM74ALS03BMX configured as inverter with pull-up to 5 V provides clean, rail-to-rail HIGH-level signal. Use Value: Achieves VIH = 5 V output swing - exceeds minimum 3.5 V requirement for 74HC-series inputs without voltage divider. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NAND gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALS03N | Same logic function and AC specs; PDIP-14 package (θJA = 86.5°C/W), higher thermal performance but larger footprint | Preferred for through-hole prototyping or high-reliability industrial assemblies requiring manual rework | Select SN74ALS03N when board assembly uses wave soldering or requires easier visual inspection and hand repair |
| 74LVX03M | Low-voltage CMOS (2.7–3.6 V), 3.3 V logic levels, lower ICC (< 2 µA), but incompatible VCC and VIH/VIL thresholds | Suitable only in new 3.3 V systems; not interchangeable in 5 V TTL environments | Choose 74LVX03M only for green-field 3.3 V designs - not a functional replacement for DM74ALS03BMX in existing 5 V systems |
Compared with SN74ALS03N and 74LVX03M, DM74ALS03BMX uniquely balances industrial-grade 5 V TTL compatibility, SOIC-14 space efficiency, and proven reliability in legacy upgrades - making it the optimal choice for footprint-constrained, 5 V wired-AND applications requiring drop-in replaceability.
Availability
DM74ALS03BMX is available at Aetrix Electronics and suitable for industrial control bus design, legacy system logic upgrades, and LED driver interface applications requiring stable component supply and long-term obsolescence management.
Supply support for DM74ALS03BMX 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 US-based analog and digital IC manufacturer, acquired by ON Semiconductor in 2016; its legacy TTL and ALS logic families remain widely deployed in industrial and aerospace systems.
The DM74ALS03BMX belongs to the 74ALS (Advanced Low-Power Schottky) logic family - engineered for superior speed-power trade-offs in 5 V digital systems where compatibility with earlier TTL generations is mandatory.
FAQ
What is the maximum sink current per output of the DM74ALS03BMX?
The DM74ALS03BMX guarantees a minimum LOW-level output current (IOL) of 8 mA per open-collector output under VCC = 4.5 V and VOL ≤ 0.4 V conditions. This rating allows direct driving of LEDs, small relays, or multiple TTL inputs without external buffering. Exceeding 8 mA risks violating VOL specification or accelerating parametric drift over temperature.
Does the DM74ALS03BMX require external pull-up resistors on its outputs?
Yes - every output of the DM74ALS03BMX is open-collector and requires an external pull-up resistor to VCC or another logic rail to establish a valid HIGH logic level. The value depends on fan-out, speed, and voltage levels; typical values range from 1 kΩ to 10 kΩ. Without pull-ups, outputs remain floating and cannot drive HIGH.
Is the DM74ALS03BMX pin-compatible with the original 74S03?
Yes - the DM74ALS03BMX is explicitly documented as pin-for-pin compatible with both 74S03 and 74LS03 devices. Its SOIC-14 footprint (M14A) matches the pin numbering and function layout of those predecessors, enabling direct replacement in existing PCBs without redesign or rework.
What is the operating temperature range for the DM74ALS03BMX?
The DM74ALS03BMX is rated for industrial operation from 0°C to +70°C ambient temperature. This range is defined in the Recommended Operating Conditions table and applies to all DC and AC specifications. Operation outside this range may result in undefined logic behavior or accelerated parametric shift.
Can the DM74ALS03BMX be used in 3.3 V systems?
No - the DM74ALS03BMX is a 5 V TTL-family device requiring VCC = 4.5–5.5 V. Its input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and output drive characteristics are optimized for 5 V operation. Using it at 3.3 V violates Absolute Maximum Ratings and will cause unreliable switching or excessive ICC.
DM74ALS03BMX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74ALS
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- NAND Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- Open Collector
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- -
- Current - Output High, Low:
- -, 8mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 50ns @ 5V, 50pF
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
DM74ALS03BMX FAQ
1.How can I place an order for DM74ALS03BMX through Aetrix?
Please submit a Request for Quotation (RFQ) for DM74ALS03BMX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DM74ALS03BMX reliable?
The price and inventory of DM74ALS03BMX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM74ALS03BMX is usually 5 days.
3.What payment methods are accepted for DM74ALS03BMX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM74ALS03BMX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM74ALS03BMX?
DM74ALS03BMX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM74ALS03BMX order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DM74ALS03BMX?
For technical support, including DM74ALS03BMX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM74ALS03BMX requirements.
6.How does Aetrix verify that DM74ALS03BMX is sourced from the original manufacturer or authorized distributors?
All DM74ALS03BMX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DM74ALS03BMX meets industry standards.
7.What is the process for return or replacement of DM74ALS03BMX?
All DM74ALS03BMX units undergo pre-shipment inspection (PSI). If there is an issue with DM74ALS03BMX, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DM74ALS03BMX part is unused and in its original packaging.
Return procedure for DM74ALS03BMX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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