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onsemi DM74AS08MX
- Part No.:
- DM74AS08MX
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DM74AS08MX.pdf
- Description:
- IC GATE AND 4CH 2-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,635
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Product details
Overview
DM74AS08MX from Fairchild Semiconductor is a quad 2-input AND gate IC in 14-lead SOIC (M14A) package, operating at VCC = 4.5–5.5 V, with propagation delays as low as 1 ns (tPLH/tPHL), output drive of −30 mA (IO), and guaranteed performance across 0°C to +70°C. It performs discrete logic AND functions in digital control paths of industrial timing and interface circuits.
For engineers reviewing the DM74AS08MX datasheet, pinout, applications, or equivalent options, key selection criteria include its Schottky TTL-compatible switching speed, 50 pF load-rated AC performance, input voltage thresholds (VIH = 2 V, VIL = 0.8 V), and SOIC packaging for surface-mount digital logic integration.
Technical Context
The DM74AS08MX implements four independent AND gates using oxide-isolated, ion-implanted Schottky TTL technology. Each gate accepts two inputs (A, B) and delivers Y = A·B with rail-to-rail compatible logic levels and defined VIH/VIL thresholds.
It operates within a 4.5–5.5 V supply range and delivers guaranteed switching characteristics over full temperature (0°C to +70°C) and load (CL = 50 pF, RL = 500 Ω). Output drive capability supports IOL = 20 mA and IOH = −2 mA under standard test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL systems and tolerance against supply ripple. |
| tPLH / tPHL | 1 ns (min) to 5.5 ns (max) - Enables high-speed combinational logic in clocked state machines and address decoding. |
| IOL / IOH | 20 mA sink / −2 mA source - Supports direct driving of multiple TTL inputs or small LED indicators without buffering. |
| VIH / VIL | 2.0 V (min) / 0.8 V (max) - Defines unambiguous logic level recognition in mixed-logic or noisy industrial environments. |
| Operating Temp | 0°C to +70°C - Specifies commercial-grade ambient operation suitable for non-extended industrial enclosures. |
| ICC (Outputs HIGH) | 5.8–9.3 mA - Indicates static power consumption per device when all outputs are asserted high. |
Pinout & Package
DM74AS08MX is housed in a 14-lead Small Outline Integrated Circuit (SOIC) package, JEDEC MS-012, 0.150" narrow body (Package Number M14A), with standard pin spacing of 0.050" and thermal resistance θJA = 114.0°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 8, 9, 11, 12 | Input (A/B per gate) | Eight total inputs across four AND gates; each pair (e.g., pins 1&2) feeds one gate's A and B inputs. |
| 3, 6, 10, 13 | Output (Y per gate) | Four independent AND 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 | Positive supply terminal; requires local 0.1 µF decoupling capacitor near pin for stable high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Schottky TTL process | Oxide-isolated, ion-implanted fabrication enables faster switching and lower power than standard TTL. |
| Guaranteed AC specs at 50 pF | Propagation delay and transition times validated under realistic capacitive loading, not just open-circuit conditions. |
| Full temperature & VCC range rating | All electrical specs guaranteed from 0°C to +70°C and VCC = 4.5–5.5 V - no derating required in spec-compliant designs. |
| Pin-for-pin compatibility | Direct replacement for 74S08, 74LS08, and 74ALS08 in existing SOIC footprints without layout change. |
Applications
| Industrial Control Logic | Digital Signal Routing |
|---|---|
Use Scenario: Enabling/disabling data paths in programmable logic controllers based on dual safety interlock signals. IC Role / Device Role / Timing Role: Quad AND gate performing real-time coincidence detection of redundant enable inputs before actuating output drivers. Use Value: Sub-6 ns propagation ensures deterministic response within tight PLC scan cycles; SOIC packaging supports compact PCB layout in DIN-rail mounted modules. | Use Scenario: Selecting active signal sources in multi-channel sensor acquisition systems with shared bus architecture. IC Role / Device Role / Timing Role: Gate-level arbitration where two control bits determine which ADC channel connects to the serial interface. Use Value: Guaranteed VIH/VIL margins prevent metastability during hot-swap or noisy field wiring; 20 mA sink drives bus transceivers directly. |
| Legacy System Repair | Power Sequencing Enable |
Use Scenario: Replacing obsolete 74S08 in vintage test equipment requiring identical logic function and timing. IC Role / Device Role / Timing Role: Drop-in functional and timing replacement preserving original board-level timing budgets and fanout. Use Value: Pin-for-pin SOIC compatibility avoids rework; identical 1–5.5 ns delay range maintains setup/hold integrity in legacy clock domains. | Use Scenario: Generating synchronized enable pulses for DC-DC converter rails only when both voltage monitor and thermal fault signals are inactive. IC Role / Device Role / Timing Role: Dual-input AND gate combining isolated fault flags to produce clean, glitch-free power-enable strobe. Use Value: Low VOL (0.35 V typ.) ensures robust noise margin against false turn-on; −2 mA IOH supports pull-up networks in enable chains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar AND gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AS08DR | TI part in SOIC-14; identical VCC, VIH/VIL, and tPLH/tPHL specs; ICC slightly higher (6.5–9.8 mA). | Same pinout and logic function; qualified for extended temp (−40°C to +85°C) and automotive AEC-Q100 Grade 3. | Select for extended temperature or automotive-qualified designs where DM74AS08MX's 0°C–70°C range is insufficient. |
| 74VHC08M | CMOS variant (VHC family); wider VCC range (2–5.5 V); slower max delay (7.5 ns); lower ICC (2 µA typ.), but IOL = 8 mA only. | Not pin-compatible; requires redesign for 5 V-only systems; better for ultra-low-power or mixed-voltage interfacing. | Choose when supply voltage flexibility or static power reduction outweighs speed and drive strength requirements. |
Compared with SN74AS08DR and 74VHC08M, the DM74AS08MX offers best-in-class propagation speed and output drive within its commercial temperature envelope, while maintaining legacy TTL compatibility - making it optimal for cost-sensitive, space-constrained 5 V logic upgrades and repair.
Availability
DM74AS08MX is available at Aetrix Electronics and suitable for industrial control logic, digital signal routing, legacy system repair, and power sequencing enable applications requiring stable component supply and long-term sourcing continuity.
Supply support for DM74AS08MX 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 DM74AS08MX belongs to the 74AS (Advanced Schottky) TTL logic family, designed specifically for high-speed, low-power digital control in commercial-grade 5 V systems where reliability and pin compatibility with earlier TTL generations were critical.
FAQ
What logic family does the DM74AS08MX belong to, and how does it differ from standard TTL?
The DM74AS08MX belongs to the 74AS (Advanced Schottky) TTL family. It uses oxide-isolated, ion-implanted Schottky technology to achieve faster switching (1–5.5 ns propagation delay) and lower power than standard 74TTL or 74S TTL. Unlike basic TTL, DM74AS08MX guarantees AC performance at 50 pF load and across full VCC and temperature ranges - a key distinction confirmed in Fairchild's DS006106 datasheet.
Is the DM74AS08MX pin-compatible with other 74-series AND gates in SOIC packages?
Yes, the DM74AS08MX is pin-for-pin compatible with 74S08, 74LS08, and 74ALS08 in the 14-lead SOIC (M14A) package. All share identical pin assignments: 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 PCB modification, as stated in the "Features" section of the DM74AS08MX datasheet.
What are the absolute maximum ratings for the DM74AS08MX, and why do they matter in circuit design?
The DM74AS08MX has absolute maximum ratings of 7 V for supply voltage (VCC) and input voltage (VI), and −65°C to +150°C for storage temperature. These values define electrical and thermal limits beyond which permanent damage may occur. Designers must ensure operating conditions - especially transient overshoot on VCC or inputs - stay within these bounds; for example, clamping diodes or RC filters may be needed if interfacing with higher-voltage signals. These ratings are specified in Note 1 of the DM74AS08MX datasheet.
Can the DM74AS08MX drive multiple TTL inputs directly, and what is its fanout capability?
Yes, the DM74AS08MX can drive multiple TTL inputs directly. With IOL = 20 mA and VIH = 2.0 V minimum, it supports a fanout of up to 20 standard TTL loads (each requiring 0.4 mA high-level input current). Its −2 mA IOH also permits driving up to 10 TTL inputs in the HIGH state. This fanout capability is verified under recommended operating conditions in the DM74AS08MX Electrical Characteristics table.
Does the DM74AS08MX require external decoupling, and what is the recommended practice?
Yes, the DM74AS08MX requires local VCC decoupling. Fairchild recommends a 0.1 µF ceramic capacitor placed as close as possible between pin 14 (VCC) and pin 7 (GND). This minimizes high-frequency supply noise induced by fast switching (sub-6 ns edges), preventing logic glitches or ground bounce - a requirement emphasized in application guidance for all 74AS-series devices including the DM74AS08MX.
DM74AS08MX 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:
- AND 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:
- 5.5ns @ 5V, 50pF
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
DM74AS08MX FAQ
1.How can I place an order for DM74AS08MX through Aetrix?
Please submit a Request for Quotation (RFQ) for DM74AS08MX 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 DM74AS08MX reliable?
The price and inventory of DM74AS08MX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM74AS08MX is usually 5 days.
3.What payment methods are accepted for DM74AS08MX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM74AS08MX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM74AS08MX?
DM74AS08MX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM74AS08MX 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 DM74AS08MX?
For technical support, including DM74AS08MX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM74AS08MX requirements.
6.How does Aetrix verify that DM74AS08MX is sourced from the original manufacturer or authorized distributors?
All DM74AS08MX 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 DM74AS08MX meets industry standards.
7.What is the process for return or replacement of DM74AS08MX?
All DM74AS08MX units undergo pre-shipment inspection (PSI). If there is an issue with DM74AS08MX, 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 DM74AS08MX part is unused and in its original packaging.
Return procedure for DM74AS08MX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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