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onsemi DM74ALS86N
- Part No.:
- DM74ALS86N
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
DM74ALS86N.pdf
- Description:
- IC GATE XOR 4CH 2-INP 14MDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,898
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Product details
Overview
DM74ALS86N from Fairchild Semiconductor is a quad 2-input exclusive-OR gate in a 14-lead PDIP package, operating at VCC = 4.5–5.5 V, with propagation delays as low as 2 ns (tPHL, HIGH-to-LOW), output drive of ±112 mA (IO), and guaranteed performance across 0°C to +70°C. It performs digital logic comparison and parity generation in TTL-based control and data path circuits.
For engineers reviewing the DM74ALS86N datasheet, pinout, applications, or equivalent options, key selection criteria include its 50 pF load switching specs, Schottky TTL compatibility, input clamp voltage of −1.5 V, LOW-level input threshold of 0.8 V, and PDIP thermal resistance of 87.0°C/W.
Technical Context
The DM74ALS86N implements four independent XOR gates using advanced oxide-isolated, ion-implanted Schottky TTL technology. Each gate computes Y = A ⊕ B = AB̅ + A̅B, with guaranteed AC performance over full temperature and supply range.
It is functionally and pin-for-pin compatible with standard Schottky (74S86) and low-power Schottky (74LS86) TTL counterparts. Input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) and output drive (IOL = 8 mA, IOH = −0.4 mA) align with TTL interface standards for direct integration into legacy 5 V logic systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures robust operation under noisy 5 V rail conditions common in industrial control backplanes |
| tPHL / tPLH | 2 ns to 17 ns - enables high-speed data comparison in synchronous bus arbitration and error-detection circuits |
| IOL / IOH | 8 mA / −0.4 mA - supports direct fanout to ≥10 standard TTL loads without buffering |
| VIH / VIL | 2.0 V min / 0.8 V max - provides noise margin >0.4 V for reliable logic level interpretation in mixed-signal environments |
| Operating Temp | 0°C to +70°C - qualified for commercial-grade embedded systems including instrumentation and peripheral controllers |
| θJA | 87.0°C/W - defines thermal derating limit for continuous operation in enclosed plastic enclosures without forced airflow |
Pinout & Package
DM74ALS86N is housed in a 14-lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" wide, with through-hole mounting and industry-standard lead pitch (0.100").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 8, 9, 11, 12 | Input (A/B per gate) | Four independent XOR gates: Gate 1 (pins 1,2→3), Gate 2 (4,5→6), Gate 3 (8,9→10), Gate 4 (11,12→13) |
| 3, 6, 10, 13 | Output (Y per gate) | Active-HIGH TTL-compatible outputs; each drives up to 8 mA sink current |
| 7 | GND | Logic ground reference; must be connected directly to system power plane for noise immunity |
| 14 | VCC | +5 V supply input; requires local 0.1 µF ceramic decoupling adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Schottky TTL process | Oxide-isolated, ion-implanted fabrication delivers improved speed-power tradeoff vs. standard 74LS |
| Guaranteed switching at 50 pF | Validated timing performance into typical PCB trace + gate input capacitance loads without derating |
| Full temperature & VCC range spec | All parameters guaranteed from 0°C to +70°C and 4.5–5.5 V - eliminates design margin uncertainty |
| Pin-for-pin compatibility | Direct drop-in replacement for 74S86 and 74LS86 in existing layouts and firmware |
Applications
| Parity Generator/Checker | Control Signal Arbitration |
|---|---|
Use Scenario: Detecting single-bit errors in 8-bit data buses within microcontroller peripherals or memory controllers. IC Role / Device Role / Timing Role: Four XOR gates compute even/odd parity across nibbles; outputs combined via external OR for error flag. Use Value: Enables real-time hardware parity validation with <17 ns latency per bit pair, meeting cycle-time budgets in 8 MHz bus systems. | Use Scenario: Resolving simultaneous enable requests from multiple DMA channels in a shared resource controller. IC Role / Device Role / Timing Role: XORs channel request signals to generate priority-encoded grant lines with deterministic race-free resolution. Use Value: Eliminates metastability risk in asynchronous request synchronization by providing combinational, glitch-minimized grant logic. |
| Data Path Comparator | Synchronous Clock Enable Logic |
Use Scenario: Comparing successive ADC sample values in real-time signal monitoring for change detection. IC Role / Device Role / Timing Role: Performs bitwise XOR between latched samples; result fed to NOR gate to assert "no change" flag. Use Value: Reduces CPU polling overhead by generating interrupt-on-change with sub-20 ns response from sample capture. | Use Scenario: Enabling clock distribution to FPGA configuration logic only when valid bitstream CRC passes. IC Role / Device Role / Timing Role: XOR compares CRC checksum bits; output enables clock buffer enable pin synchronously with system reset release. Use Value: Prevents partial configuration lockup by ensuring clock enable occurs only after verified integrity check completes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar XOR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LS86N | Slower tPHL/tPLH (max 22 ns), lower IOL (8 mA same), higher ICCH (4.5 mA typ vs. 4.5 mA for DM74ALS86N) | Same PDIP-14 footprint; suitable where speed margin >5 ns is acceptable | Prefer for cost-sensitive, lower-speed legacy designs with no timing closure pressure |
| MC74AC86N | CMOS process; wider VCC (2–6 V), faster tPLH/tPHL (max 7.5 ns), lower ICC (2 µA typ), but VIH/VIL thresholds differ (30% VCC / 70% VCC) | Not TTL-compatible; requires level-shifting or redesign if interfacing with 74LS/ALS families | Choose only when migrating to 3.3 V systems or requiring ultra-low static power |
Compared with SN74LS86N and MC74AC86N, the DM74ALS86N uniquely balances TTL compatibility, 2 ns minimum propagation delay, and guaranteed 50 pF load performance - making it optimal for upgrading legacy 74S/74LS systems without layout or voltage rail changes.
Availability
DM74ALS86N is available at Aetrix Electronics and suitable for industrial control panels, test equipment interfaces, and legacy computer peripheral designs requiring stable component supply and long-term obsolescence management.
Supply support for DM74ALS86N 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.
The DM74ALS86N belongs to Fairchild's 74ALS logic family, engineered for high-speed, low-power TTL-compatible digital systems where reliability and pin compatibility with earlier Schottky families were critical.
FAQ
What logic family does the DM74ALS86N belong to, and how does it differ from standard TTL?
The DM74ALS86N belongs to the Advanced Low-Power Schottky (74ALS) logic family. It uses oxide-isolated, ion-implanted Schottky TTL technology, delivering faster switching (2–17 ns) and lower power (ICCL = 3.9–5.9 mA) than standard 74TTL or 74LS. Unlike basic TTL, DM74ALS86N guarantees performance across full VCC (4.5–5.5 V) and temperature (0°C to +70°C) ranges - a key differentiator for industrial deployments.
Is the DM74ALS86N pin-compatible with the 74LS86 and 74S86?
Yes, the DM74ALS86N is explicitly specified as functionally and pin-for-pin compatible with both 74S86 and 74LS86 devices. Its pinout matches JEDEC MS-001 PDIP-14 layout exactly: inputs and outputs occupy identical positions, and VCC (pin 14) and GND (pin 7) align. This allows direct replacement without PCB modification in legacy designs.
What is the maximum capacitive load the DM74ALS86N can drive while maintaining guaranteed timing?
The DM74ALS86N switching characteristics are guaranteed at CL = 50 pF, per Fairchild DS006195. This load represents typical PCB trace + input capacitance of downstream TTL gates. Driving >50 pF may increase propagation delay beyond the 2–17 ns spec limits and is not characterized - external buffering is recommended for heavier loads.
Does the DM74ALS86N support operation outside the 0°C to +70°C range?
No. The DM74ALS86N is rated only for 0°C to +70°C free-air operating temperature, as defined in its Recommended Operating Conditions. While absolute maximum ratings extend to −65°C to +150°C, electrical performance (e.g., propagation delay, VOH/VOL) is not guaranteed outside the specified commercial range. For extended temperature use, consider automotive-qualified alternatives.
What is the purpose of the input clamp voltage (VIK = −1.5 V) specification for the DM74ALS86N?
The input clamp voltage (VIK = −1.5 V at II = −18 mA) defines the forward voltage of the internal input protection diode. It ensures safe handling of transient negative excursions (e.g., ESD, inductive kickback) by clamping inputs below −1.5 V, diverting current to GND. This protects the internal transistors and maintains reliability in electrically noisy environments like motor control or relay-driven systems.
DM74ALS86N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74ALS
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- XOR (Exclusive OR)
- 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:
- 17ns @ 5V, 50pF
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-MDIP
DM74ALS86N FAQ
1.How can I place an order for DM74ALS86N through Aetrix?
Please submit a Request for Quotation (RFQ) for DM74ALS86N 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 DM74ALS86N reliable?
The price and inventory of DM74ALS86N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DM74ALS86N is usually 5 days.
3.What payment methods are accepted for DM74ALS86N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DM74ALS86N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DM74ALS86N?
DM74ALS86N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DM74ALS86N 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 DM74ALS86N?
For technical support, including DM74ALS86N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DM74ALS86N requirements.
6.How does Aetrix verify that DM74ALS86N is sourced from the original manufacturer or authorized distributors?
All DM74ALS86N 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 DM74ALS86N meets industry standards.
7.What is the process for return or replacement of DM74ALS86N?
All DM74ALS86N units undergo pre-shipment inspection (PSI). If there is an issue with DM74ALS86N, 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 DM74ALS86N part is unused and in its original packaging.
Return procedure for DM74ALS86N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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