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onsemi DM74ALS32M
- Part No.:
- DM74ALS32M
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DM74ALS32M.pdf
- Description:
- IC GATE OR 4CH 2-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,081
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Product details
Overview
DM74ALS32M from Fairchild Semiconductor is a quad 2-input OR gate IC in 14-lead SOIC (M14A) package, operating at VCC = 4.5–5.5 V, with propagation delays as low as 3 ns (tPLH/tPHL), output drive capability of ±112 mA (IO), and guaranteed performance across 0°C to +70°C. It performs discrete logic OR functions in digital control and signal routing circuits.
For engineers reviewing the DM74ALS32M datasheet, pinout, applications, or equivalent options, key selection criteria include its TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V), 50 pF load switching specs, SOIC thermal resistance (θJA = 120°C/W), and functional compatibility with 74S32 and 74LS32 families.
Technical Context
The DM74ALS32M implements four independent 2-input OR gates using advanced oxide-isolated, ion-implanted Schottky TTL technology. It delivers improved AC performance over standard Schottky and low-power Schottky TTL counterparts while maintaining full DC compatibility.
Its logic behavior follows Y = A + B per gate, with guaranteed switching characteristics over the full recommended operating range (VCC = 4.5–5.5 V, TA = 0°C to +70°C) and specified input clamp voltage (VIK = −1.5 V) for transient protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures stable operation across standard TTL supply tolerance. |
| tPLH / tPHL | 3 ns (min) to 14 ns (max) - Enables high-speed combinational logic in clocked systems up to ~35 MHz. |
| IOL / IOH | 8 mA sink / −0.4 mA source - Supports direct interfacing with multiple standard TTL inputs without buffering. |
| VIH / VIL | 2.0 V / 0.8 V - Matches legacy TTL input thresholds for seamless integration into existing 5 V logic designs. |
| θJA | 120°C/W (SOIC) - Defines thermal derating limit for continuous operation at ambient temperatures up to +70°C. |
| ICC (Outputs HIGH) | 1.9–4.0 mA - Low quiescent current enables use in power-constrained digital subsystems. |
Pinout & Package
DM74ALS32M is housed in a 14-lead Small Outline Integrated Circuit (SOIC) package per JEDEC MS-012, 0.150" narrow body width, with gull-wing leads and standard surface-mount footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 8, 9, 11, 12 | Input (A/B per gate) | Eight total inputs across four OR gates; each pair (e.g., pins 1&2) feeds one gate. |
| 3, 6, 10, 13 | Output (Y per gate) | Four independent OR outputs; pin 3 = gate 1 output, pin 6 = gate 2 output, etc. |
| 7 | GND | Ground reference for all logic and power terminals; must be low-impedance connection. |
| 14 | VCC | +5 V supply rail; decoupling capacitor (0.1 µF) required near this pin for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Schottky TTL process | Oxide-isolated, ion-implanted fabrication ensures consistent speed and reduced leakage vs. standard TTL. |
| Guaranteed switching at 50 pF | Validated timing performance under standardized capacitive load-critical for board-level timing predictability. |
| Full temperature-range specification | All electrical parameters guaranteed from 0°C to +70°C-no derating needed for commercial-grade applications. |
| Pin-for-pin compatibility | Direct replacement for 74S32 and 74LS32 in SOIC layout-no PCB redesign required. |
Applications
| Industrial Control Logic | Test Equipment Signal Routing |
|---|---|
Use Scenario: Combining status signals from multiple sensors (e.g., limit switches, pressure alarms) into a single fault-bus line. IC Role / Device Role / Timing Role: Discrete OR logic element performing real-time wired-OR aggregation with sub-14 ns latency. Use Value: Eliminates need for microcontroller polling or additional logic layers-reduces BOM count and improves system response time. | Use Scenario: Enabling multiplexed stimulus paths in automated test fixtures where multiple sources may assert a trigger condition. IC Role / Device Role / Timing Role: Gate-level combinatorial logic block that merges asynchronous trigger events before clock synchronization. Use Value: Provides deterministic, zero-software-latency signal arbitration without introducing metastability risks. |
| Legacy System Repair | Power Sequencing Supervision |
Use Scenario: Replacing obsolete 74S32 or 74LS32 devices on aging industrial PLC backplanes requiring drop-in reliability. IC Role / Device Role / Timing Role: Pin-compatible TTL logic replacement preserving original timing margins and fanout capability. Use Value: Restores functionality without modifying schematics or layouts-accelerates field repair and extends equipment service life. | Use Scenario: Monitoring multiple power-rail OK signals (e.g., +3.3 V, +5 V, +12 V) to generate a global "Power Good" assertion. IC Role / Device Role / Timing Role: Combinational logic element generating active-HIGH enable when any rail fails. Use Value: Delivers fail-fast detection with guaranteed worst-case 14 ns response-prevents downstream IC damage during brownout conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALS32DR | Same ALS family, identical logic function and DC specs; tPLH/tPHL max = 15 ns (vs. 14 ns), θJA = 115°C/W (SOIC). | TI packaging uses different SOIC variant (D package); pinout identical but thermal profile slightly better. | Select SN74ALS32DR if sourcing from TI-authorized channels with tighter thermal margin requirements. |
| MC74ALS32DG | Onsemi variant; same pinout and logic, but ICC (Outputs HIGH) max = 4.2 mA (vs. 4.0 mA); VIK = −1.4 V. | Minor parametric spread in supply current and clamp voltage-fully interchangeable in non-critical noise environments. | Choose MC74ALS32DG when consolidating with other Onsemi ALS logic for supply chain simplification. |
Compared with SN74ALS32DR and MC74ALS32DG, the DM74ALS32M offers the tightest propagation delay ceiling (14 ns), optimized for timing-critical paths, while retaining identical pinout and interface compatibility-making it preferred for legacy timing-constrained designs.
Availability
DM74ALS32M is available at Aetrix Electronics and suitable for industrial control logic, test equipment signal routing, legacy system repair, and power sequencing supervision requiring stable component supply and long-term obsolescence mitigation.
Supply support for DM74ALS32M 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 logic portfolio remains widely deployed in industrial and telecom infrastructure.
The DM74ALS32M belongs to the 74ALS (Advanced Low-Power Schottky) logic family, engineered for higher speed and lower power than standard TTL while maintaining full compatibility with existing 5 V logic systems.
FAQ
What logic family does the DM74ALS32M belong to, and how does it differ from standard TTL?
The DM74ALS32M belongs to the 74ALS (Advanced Low-Power Schottky) family. It combines Schottky-clamped transistors for speed with optimized doping and isolation to reduce power versus 74S, while delivering faster switching (3–14 ns) and lower ICC than 74LS. Unlike standard TTL, it guarantees performance across full VCC and temperature ranges without derating.
Is the DM74ALS32M pin-compatible with other 74xx32 variants, and which ones?
Yes, the DM74ALS32M is pin-for-pin compatible with 74S32 and 74LS32 in the same 14-lead SOIC package. Its pinout matches the industry-standard dual-in-line configuration: inputs on pins 1/2, 4/5, 8/9, 11/12; outputs on pins 3, 6, 10, 13; VCC on pin 14; GND on pin 7. This allows direct substitution without layout changes.
What are the absolute maximum ratings for the DM74ALS32M, and why do they matter in design?
The DM74ALS32M has absolute maximum ratings of 7 V for VCC and input voltage, and −65°C to +150°C for storage temperature. These define safety limits beyond which permanent damage may occur. Designers must ensure operating conditions (e.g., VCC ≤ 5.5 V, TA ≤ +70°C) stay within the recommended range-not the absolute max-to guarantee parametric performance and reliability.
Can the DM74ALS32M drive standard TTL loads directly, and what is its fanout capability?
Yes, the DM74ALS32M can directly drive standard TTL loads. With IOL = 8 mA and IOH = −0.4 mA, it supports a fanout of up to 20 standard TTL inputs (based on IIL = −1.6 mA per load). Its VIH = 2.0 V and VIL = 0.8 V ensure clean interfacing without level-shifting circuitry in 5 V systems.
Does the DM74ALS32M require external decoupling, and what value is recommended?
Yes, the DM74ALS32M requires local VCC decoupling to suppress switching noise and maintain stable logic thresholds. A 0.1 µF ceramic capacitor placed between pin 14 (VCC) and pin 7 (GND), as close as possible to the device, is recommended per the Fairchild datasheet DS006190. Larger bulk capacitance (e.g., 10 µF) may be added nearby for system-level stability.
DM74ALS32M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74ALS
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- OR Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Max):
- -
- Current - Output High, Low:
- 400µA, 8mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 14ns @ 5V, 50pF
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
DM74ALS32M FAQ
1.How can I place an order for DM74ALS32M through Aetrix?
Please submit a Request for Quotation (RFQ) for DM74ALS32M 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 DM74ALS32M reliable?
The price and inventory of DM74ALS32M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM74ALS32M is usually 5 days.
3.What payment methods are accepted for DM74ALS32M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM74ALS32M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM74ALS32M?
DM74ALS32M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM74ALS32M 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 DM74ALS32M?
For technical support, including DM74ALS32M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM74ALS32M requirements.
6.How does Aetrix verify that DM74ALS32M is sourced from the original manufacturer or authorized distributors?
All DM74ALS32M 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 DM74ALS32M meets industry standards.
7.What is the process for return or replacement of DM74ALS32M?
All DM74ALS32M units undergo pre-shipment inspection (PSI). If there is an issue with DM74ALS32M, 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 DM74ALS32M part is unused and in its original packaging.
Return procedure for DM74ALS32M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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