My Inquiry
My Account
onsemi DM74AS32MX
- Part No.:
- DM74AS32MX
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DM74AS32MX.pdf
- Description:
- IC GATE OR 4CH 2-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,599
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DM74AS32MX from Fairchild Semiconductor is a quad 2-input OR gate IC built using advanced oxide-isolated, ion-implanted Schottky TTL process. It delivers guaranteed switching performance at 50 pF load across full temperature (0°C to +70°C) and supply voltage (4.5V–5.5V) ranges, with propagation delays as low as 1 ns (tPLH/tPHL), and drives up to 20 mA low-level output current-used in digital logic interfacing, bus arbitration, and discrete signal combining in industrial control systems.
For engineers reviewing the DM74AS32MX datasheet, pinout, applications, or equivalent options, key selection criteria include its SOIC-14 (M14A) package, guaranteed AC performance over temperature, TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V), and functional compatibility with 74S32, 74LS32, and 74ALS32 families.
Technical Context
The DM74AS32MX implements four independent OR gates in a single monolithic IC, each performing Boolean Y = A + B logic. Its Schottky-clamped TTL architecture ensures fast switching and reduced saturation delay, with input clamp voltage (VIK = −1.2 V) enabling robust noise immunity during transient conditions.
It operates strictly within 4.5–5.5 V VCC and supports rail-to-rail logic swing: VOH ≥ VCC − 2 V (at IOH = −2 mA), VOL ≤ 0.5 V (at IOL = 20 mA). The device is not designed for open-collector or three-state operation-outputs are standard push-pull TTL.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL power rails and tolerance to supply ripple. |
| Propagation Delay | 1 ns (min) to 5.8 ns (max) - enables high-speed combinational logic in clocked systems up to ~100 MHz toggle rate. |
| IOL / IOH | 20 mA sink / −2 mA source - sufficient to drive multiple standard TTL inputs (fan-out ≥ 20) without external buffering. |
| VIL / VIH | 0.8 V / 2.0 V - matches legacy TTL input thresholds, ensuring interoperability with 74-series logic families. |
| Operating Temperature | 0°C to +70°C - rated for commercial-grade applications including office equipment and industrial PLC I/O modules. |
| Input Clamp Voltage | −1.2 V - protects inputs against negative transients and improves ESD robustness in noisy environments. |
Pinout & Package
DM74AS32MX is supplied in a 14-lead Small Outline Integrated Circuit (SOIC) package per JEDEC MS-012, 0.150" narrow body (Package Number M14A), with standard 1.27 mm pitch and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 8, 9, 11, 12 | Input (A/B of each OR gate) | Dual inputs per gate; all TTL-compatible, with VIH/VIL thresholds defined for reliable logic recognition. |
| 3, 6, 10, 13 | Output (Y of each OR gate) | Standard push-pull TTL outputs; capable of sourcing −2 mA or sinking 20 mA under specified VCC. |
| 7 | GND | Power ground reference for all gates; must be low-impedance to maintain noise margin and timing integrity. |
| 14 | VCC | Positive supply terminal; decoupling capacitor (0.1 µF ceramic) required adjacent to pin for stable high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Schottky TTL process | Oxide-isolation and ion implantation reduce parasitic capacitance and improve tPLH/tPHL consistency across temperature. |
| Guaranteed AC specs at 50 pF | Ensures predictable timing behavior when driving typical PCB trace + input capacitance loads without derating. |
| Full temperature & VCC range validation | Specified performance holds from 0°C to +70°C and 4.5–5.5 V-no design margining needed for commercial ambient. |
| Pin-for-pin compatibility | Direct replacement for 74S32, 74LS32, and 74ALS32 in existing SOIC-14 layouts-no PCB revision required. |
Applications
| Industrial Control Logic | Test Equipment Signal Routing |
|---|---|
Use Scenario: Combining status signals from multiple sensors (e.g., limit switches, pressure sensors) into a single alarm enable line in a PLC backplane. IC Role / Device Role / Timing Role: Discrete OR logic gate aggregating asynchronous digital inputs with sub-6 ns propagation delay. Use Value: Eliminates need for microcontroller polling or FPGA resources; provides deterministic, zero-software-latency signal fusion. | Use Scenario: Enabling multiplexer select lines based on pass/fail flags from parallel test channels in automated test equipment. IC Role / Device Role / Timing Role: High-speed combinatorial logic element synchronizing decision outputs before DAC update or relay activation. Use Value: Supports >100 kHz test cycle rates due to guaranteed 1 ns minimum propagation delay and 50 pF load drive capability. |
| Legacy System Repair | Bus Arbitration Interface |
Use Scenario: Replacing obsolete 74S32 or 74LS32 in vintage instrumentation where board space and footprint are fixed. IC Role / Device Role / Timing Role: Drop-in TTL logic replacement maintaining identical pinout, voltage thresholds, and fan-out behavior. Use Value: Restores functionality without redesign; leverages improved AC performance and thermal reliability of AS-series process. | Use Scenario: Generating a shared "bus busy" indicator by OR-ing individual master request lines in a multi-master synchronous bus. IC Role / Device Role / Timing Role: Wired-OR equivalent using discrete gates to avoid contention on open-drain buses. Use Value: Provides clean, glitch-free bus occupancy detection with TTL-level compatibility and 20 mA drive strength for LED/status loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2-input OR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AS32DR | Same AS-family process, identical AC/DC specs, SOIC-14 package (M14A), but TI-sourced with different marking and reel packaging. | No functional difference; validated for same commercial temperature range and 5 V operation. | Select SN74AS32DR when dual-sourcing or TI-aligned BOMs are required. |
| 74VHC32M | CMOS-based (VHC family), 2–5.5 V supply, lower ICC (< 2 µA), but slower max speed (7.5 ns typ), higher noise margin. | Suitable for mixed-voltage or battery-powered systems; not pin-compatible-requires layout change. | Choose 74VHC32M only if ultra-low static power or wider VCC range outweighs speed and footprint constraints. |
Compared with SN74AS32DR, DM74AS32MX offers identical timing and drive capability with Fairchild's legacy qualification; versus 74VHC32M, it trades higher ICC for superior speed and true TTL compatibility-critical in legacy 5 V logic interconnects.
Availability
DM74AS32MX is available at Aetrix Electronics and suitable for industrial control logic, test equipment signal routing, legacy system repair, and bus arbitration interface applications requiring stable component supply and long-term obsolescence mitigation.
Supply support for DM74AS32MX 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 U.S.-based semiconductor company specializing in analog and discrete power products, acquired by ON Semiconductor in 2016. Its legacy logic portfolio remains widely deployed in industrial and instrumentation systems.
The DM74AS32MX belongs to Fairchild's Advanced Schottky TTL logic family, engineered for high-speed, temperature-stable digital interfacing in commercial-grade 5 V systems where legacy compatibility and predictable timing are essential.
FAQ
What is the operating temperature range for DM74AS32MX?
The DM74AS32MX is rated for operation from 0°C to +70°C ambient temperature. This commercial-grade specification aligns with standard TTL system environments such as office automation, test equipment, and industrial control panels. It does not support extended or automotive temperature ranges, and operation outside this window may result in undefined timing or DC parameters.
Is DM74AS32MX pin-compatible with older 74-series OR gates?
Yes, DM74AS32MX is functionally and pin-for-pin compatible with 74S32, 74LS32, and 74ALS32 in the same SOIC-14 (M14A) package. All input/output pin assignments match exactly, and its VIL/VIH thresholds (0.8 V / 2.0 V) and output drive (20 mA sink) ensure seamless integration into legacy designs without layout changes.
What load capacitance is DM74AS32MX characterized for?
DM74AS32MX switching characteristics-including propagation delay (tPLH/tPHL) and transition times-are guaranteed at 50 pF total load capacitance, which represents typical combined PCB trace and driven input capacitance. Performance beyond this value requires empirical validation, as increased CL degrades edge rate and increases delay nonlinearly.
Does DM74AS32MX support three-state or open-collector outputs?
No, DM74AS32MX features standard push-pull TTL outputs only-neither three-state nor open-collector functionality is implemented. Each output actively drives HIGH or LOW; wired-OR configurations require external pull-up resistors and careful fan-out management, unlike dedicated open-collector logic devices.
What is the maximum supply voltage for DM74AS32MX?
The absolute maximum supply voltage for DM74AS32MX is 7 V, but the recommended operating range is strictly 4.5 V to 5.5 V. Operating above 5.5 V risks exceeding internal junction limits and invalidates all guaranteed AC/DC specifications-even brief transients beyond 5.5 V should be suppressed with clamping diodes or regulators.
DM74AS32MX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74AS
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 2mA, 20mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 5.8ns @ 5V, 50pF
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
DM74AS32MX FAQ
1.How can I place an order for DM74AS32MX through Aetrix?
Please submit a Request for Quotation (RFQ) for DM74AS32MX 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 DM74AS32MX reliable?
The price and inventory of DM74AS32MX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM74AS32MX is usually 5 days.
3.What payment methods are accepted for DM74AS32MX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM74AS32MX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM74AS32MX?
DM74AS32MX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM74AS32MX 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 DM74AS32MX?
For technical support, including DM74AS32MX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM74AS32MX requirements.
6.How does Aetrix verify that DM74AS32MX is sourced from the original manufacturer or authorized distributors?
All DM74AS32MX 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 DM74AS32MX meets industry standards.
7.What is the process for return or replacement of DM74AS32MX?
All DM74AS32MX units undergo pre-shipment inspection (PSI). If there is an issue with DM74AS32MX, 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 DM74AS32MX part is unused and in its original packaging.
Return procedure for DM74AS32MX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DM74AS32MX Tags
-
SN74LVC1G14DBVR
Texas Instruments
-
SN74LVC1G14DCKR
Texas Instruments
-
SN74AHC1G14DBVR
Texas Instruments
-
SN74LVC1G08DBVR
Texas Instruments
-
SN74LVC1G08DCKR
Texas Instruments
-
SN74LVC1G32DCKR
Texas Instruments
-
SN74LVC1G04DBVR
Texas Instruments
.jpg)
-
74LVC1G08GW,125
Nexperia USA Inc.
-
SN74LVC1G04DCKR
Texas Instruments
-
SN74AHC1G08DBVR
Texas Instruments
-
SN74LVC1G32DBVR
Texas Instruments
-
SN74AHCT1G08DBVR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
