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onsemi DM74ALS08SJ
- Part No.:
- DM74ALS08SJ
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
DM74ALS08SJ.pdf
- Description:
- IC GATE AND 4CH 2-INP 14SOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,574
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Product details
Overview
DM74ALS08SJ from Fairchild Semiconductor is a quad 2-input AND gate IC in EIAJ TYPE II SOP-14 package, operating at VCC = 4.5–5.5 V, with propagation delays as low as 3 ns (tPHL) and 4 ns (tPLH), rated for 0°C to +70°C industrial temperature range, and delivering 8 mA sink current - used in digital logic control, address decoding, and enable gating in TTL-based systems.
For engineers reviewing the DM74ALS08SJ datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed AC performance over full VCC/temperature range, compatibility with Schottky and LS-TTL logic families, and verified 50 pF load switching behavior per gate.
Technical Context
This device implements four independent AND gates using advanced oxide-isolated, ion-implanted Schottky TTL process technology. Each gate accepts two TTL-compatible inputs and produces a single active-high output with defined VIH (2.0 V min), VIL (0.8 V max), VOH (VCC − 2 V min), and VOL (0.4 V max at IOL = 4 mA).
It operates under recommended conditions of VCC = 4.5–5.5 V and TA = 0°C to +70°C, with ICC ranging from 1.3 mA (all outputs HIGH) to 4.0 mA (all outputs LOW). Input clamp voltage is −1.5 V, and output drive capability supports −112 mA peak sink current under short-circuit conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures stable operation across standard TTL supply tolerances |
| tPHL / tPLH | 3 ns / 4 ns typical - enables high-speed combinational logic in ≤25 MHz clock domains |
| IOL / IOH | 8 mA / −0.4 mA - drives standard TTL loads without external buffering |
| VIH / VIL | 2.0 V min / 0.8 V max - guarantees interoperability with legacy 74LS and 74S families |
| Operating Temp | 0°C to +70°C - qualified for commercial and industrial ambient environments |
| CL Load | 50 pF - AC specs validated at this capacitive load, matching common PCB trace + input capacitance |
Pinout & Package
DM74ALS08SJ is housed in a 14-lead Small Outline Package (SOP), EIAJ TYPE II, 5.3 mm wide, with gull-wing leads and JEDEC-compliant 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 AND gates; TTL-level compatible, with IIL = −0.1 mA at VIL = 0.4 V |
| 3, 6, 10, 13 | Output (Y per gate) | Four independent AND outputs; each sinks up to 8 mA while maintaining VOL ≤ 0.4 V |
| 7 | GND | Ground reference for all logic and power paths; required for noise margin and DC bias stability |
| 14 | VCC | Positive supply input; must be decoupled locally to suppress switching transients affecting all gates |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Schottky TTL process | Oxide-isolated, ion-implanted fabrication ensures consistent propagation delay and reduced power-delay product vs. standard TTL |
| Full-range AC/DC characterization | Switching and DC parameters guaranteed across entire VCC (4.5–5.5 V) and temperature (0–70°C) operating envelope |
| Pin-for-pin compatibility | Direct replacement for 74S08 and 74LS08 in SOP-14 layout - no PCB redesign needed |
| 50 pF load switching spec | Propagation delays measured and guaranteed at realistic board-level capacitive loading condition |
Applications
| Address Decoding | System Enable Gating |
|---|---|
Use Scenario: Selecting memory or peripheral chips based on CPU address bus bits in microcontroller-based embedded systems. IC Role / Device Role / Timing Role: AND gate performing address bit masking to generate chip-select signals. Use Value: Ensures precise decode window alignment with 3–4 ns propagation delay, minimizing bus contention timing margins. | Use Scenario: Enabling/disabling subsystems (e.g., ADC, UART, display driver) via processor-controlled logic lines. IC Role / Device Role / Timing Role: Logic-level gating of clock or reset signals to power-managed peripherals. Use Value: Delivers clean, jitter-free enable edges with TTL-compatible thresholds and 8 mA drive strength into downstream inputs. |
| Control Signal Combining | Legacy Bus Interface Logic |
Use Scenario: Generating composite control signals (e.g., WR ∧ CS, RD ∧ READY) in 8-bit microprocessor buses. IC Role / Device Role / Timing Role: Synchronous logic combiner for multi-signal handshaking protocols. Use Value: Guarantees sub-10 ns worst-case delay variation across all four gates, preserving setup/hold timing integrity. | Use Scenario: Interfacing modern controllers with legacy TTL-based instrumentation or industrial I/O modules. IC Role / Device Role / Timing Role: Level-shifting and signal conditioning bridge between mixed-logic-family subsystems. Use Value: Matches 74LS/74S input/output electrical characteristics, eliminating need for external resistors or translators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar AND gate logic applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALS08DR | SOIC-14 (JEDEC MS-012), identical AC/DC specs, same Fairchild die; differs only in tape-and-reel packaging and orderable suffix | No functional or timing difference; suitable for automated SMT assembly where reel format required | Select SN74ALS08DR when volume production demands tape-and-reel delivery and same footprint |
| 74LS08D | Higher propagation delay (15 ns max vs. 14 ns max), lower IOL (8 mA same), but wider VCC tolerance (4.75–5.25 V); manufactured by Nexperia/ON Semi | Acceptable in non-critical timing paths; not recommended for designs requiring <10 ns worst-case delay budget | Choose 74LS08D only if cost sensitivity outweighs speed requirement and legacy LS family sourcing is preferred |
Compared with SN74ALS08DR and 74LS08D, the DM74ALS08SJ offers identical logic performance and pinout but is optimized for standard SOP-14 manual or semi-automated placement, with guaranteed 3–4 ns typical delays critical for tight-timing legacy TTL systems.
Availability
DM74ALS08SJ is available at Aetrix Electronics and suitable for industrial control panels, legacy test equipment upgrades, and retro-computing hardware restoration requiring stable component supply and long-term obsolescence mitigation.
Supply support for DM74ALS08SJ 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 discrete semiconductors, acquired by ON Semiconductor in 2016; its legacy TTL logic portfolio remains widely deployed in industrial and military systems.
The DM74ALS08SJ belongs to the 74ALS (Advanced Low-Power Schottky) logic family, engineered to deliver superior speed-power trade-offs versus 74LS while maintaining full compatibility with earlier TTL families.
FAQ
What is the maximum propagation delay for DM74ALS08SJ at worst-case conditions?
The DM74ALS08SJ has a maximum tPHL of 10 ns and tPLH of 14 ns over the full operating range (VCC = 4.5–5.5 V, TA = 0–70°C, CL = 50 pF). These values are guaranteed in the datasheet's Switching Characteristics table and reflect worst-case performance across voltage and temperature extremes - critical for timing closure in synchronous TTL designs using the DM74ALS08SJ.
Is DM74ALS08SJ pin-compatible with 74LS08 in the same SOP-14 package?
Yes, DM74ALS08SJ is functionally and pin-for-pin compatible with 74LS08 in EIAJ TYPE II SOP-14 (M14D) package. Both share identical pin assignments, logic function, and DC interface levels. However, DM74ALS08SJ delivers faster propagation delays (3–4 ns typical vs. 15 ns typical for 74LS08), making it a direct drop-in upgrade where timing margin is constrained - confirmed by Fairchild's datasheet Feature section.
What is the recommended decoupling for DM74ALS08SJ in high-speed operation?
Each DM74ALS08SJ should use a 0.1 µF ceramic capacitor placed within 2 mm of pins 14 (VCC) and 7 (GND), with short, low-inductance traces. For boards with multiple DM74ALS08SJ devices, add one 4.7 µF tantalum or aluminum electrolytic capacitor per 5–10 ICs near the power entry point. This mitigates simultaneous switching noise that could degrade the DM74ALS08SJ's 3–4 ns edge fidelity.
Does DM74ALS08SJ support operation at 3.3 V supply?
No, DM74ALS08SJ is specified only for VCC = 4.5–5.5 V. Its internal Schottky TTL structure requires minimum 4.5 V to ensure proper transistor saturation and guaranteed VOH/VOL levels. Operating below 4.5 V risks undefined output states and increased propagation delay variability. For 3.3 V systems, consider modern CMOS alternatives like SN74LVC08A - not a substitute for DM74ALS08SJ in 5 V TTL environments.
What is the thermal resistance (θJA) of the DM74ALS08SJ SOP package?
The DM74ALS08SJ in EIAJ TYPE II SOP-14 (M14D) package has a typical junction-to-ambient thermal resistance (θJA) of 120°C/W, as documented in the Absolute Maximum Ratings section of the Fairchild datasheet. This value assumes standard JEDEC test board conditions (single-layer copper, 1 in² pad); actual θJA may improve with enhanced PCB copper area or thermal vias beneath the package.
DM74ALS08SJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74ALS
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- 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:
- 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-SOP
DM74ALS08SJ FAQ
1.How can I place an order for DM74ALS08SJ through Aetrix?
Please submit a Request for Quotation (RFQ) for DM74ALS08SJ 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 DM74ALS08SJ reliable?
The price and inventory of DM74ALS08SJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM74ALS08SJ is usually 5 days.
3.What payment methods are accepted for DM74ALS08SJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM74ALS08SJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM74ALS08SJ?
DM74ALS08SJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM74ALS08SJ 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 DM74ALS08SJ?
For technical support, including DM74ALS08SJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM74ALS08SJ requirements.
6.How does Aetrix verify that DM74ALS08SJ is sourced from the original manufacturer or authorized distributors?
All DM74ALS08SJ 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 DM74ALS08SJ meets industry standards.
7.What is the process for return or replacement of DM74ALS08SJ?
All DM74ALS08SJ units undergo pre-shipment inspection (PSI). If there is an issue with DM74ALS08SJ, 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 DM74ALS08SJ part is unused and in its original packaging.
Return procedure for DM74ALS08SJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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