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Texas Instruments SN74AS760DW
- Part No.:
- SN74AS760DW
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74AS760DW.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,114
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Product details
Overview
SN74AS760DW from Texas Instruments is an octal non-inverting buffer/line driver with open-collector outputs, designed for memory address bus driving and clock distribution in TTL-compatible systems. It features dual independent 4-bit channels, symmetrical active-low output-enable (OE) inputs, pnp input structure for reduced DC loading, and operates at 4.5–5.5 V over 0°C to 70°C.
For engineers reviewing the SN74AS760DW datasheet, SN74AS760DW pinout, SN74AS760DW application, or SN74AS760DW equivalent, this page delivers verified electrical specs, package mapping, functional role in bus buffering, and validated alternative options for legacy system maintenance and redesign.
Technical Context
The SN74AS760DW implements two independent 4-bit non-inverting buffer sections, each with dedicated active-low output-enable control (1OE and 2OE). Its open-collector outputs eliminate 3-state overlap timing constraints and support wired-AND bus configurations.
It uses pnp input transistors to minimize input current draw (IIL = −1 mA max), enabling high fan-out without excessive loading on preceding logic stages. Propagation delays are tightly specified: tPHL/tPLH ≤ 6 ns and ≤ 7 ns respectively under 50 pF load, supporting high-speed address and control signal routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V TTL systems; absolute max 7 V prevents damage during transient overvoltage. |
| Output Type | Open-collector - enables wired-AND bus structures, level translation via external pull-up, and eliminates 3-state contention risks. |
| Low-Level Output Current | 64 mA per output - sufficient to drive heavy capacitive loads (e.g., long PCB traces or multiple TTL inputs) while maintaining VOL ≤ 0.55 V. |
| Propagation Delay | tPHL ≤ 6 ns, tPLH ≤ 18.5 ns - ensures sub-20 ns signal path timing for memory address and clock distribution in fast digital systems. |
| Input Loading | IIL = −1 mA max, IIH = 20 µA max - low DC input current enables high fan-out without degrading source stage performance. |
| Operating Temperature | 0°C to 70°C - commercial-grade rating suitable for industrial control, instrumentation, and embedded computing applications. |
Pinout & Package
SN74AS760DW is housed in a 20-pin SOIC (DW) package, 7.5 mm wide, 12.8 mm long, 2.65 mm max height, with 1.27 mm pitch and gull-wing leads. RoHS-compliant, NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Independent control of each 4-bit channel; OE low enables outputs, high places them in high-impedance open-collector state. |
| 1A1–1A4, 2A1–2A4 | Input signals | Eight buffered inputs across two groups; non-inverting logic transfer to corresponding Y outputs. |
| 1Y1–1Y4, 2Y1–2Y4 | Open-collector outputs | Eight outputs capable of sinking up to 64 mA each; require external pull-up resistors for logic HIGH assertion. |
| VCC, GND | Power supply | Single 5 V supply rail; decoupling near pins 10 (GND) and 11 (VCC) required for noise immunity in high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Eliminates 3-state overlap protection | Open-collector architecture removes timing-critical window where both drivers could be active simultaneously-critical for reliable bus arbitration. |
| pnp input structure | Reduces input current loading by >95% vs. standard TTL inputs, allowing one SN74AS760DW to drive multiple downstream devices without signal degradation. |
| Symmetrical OE inputs | Dual active-low enables (1OE, 2OE) allow independent gating of each 4-bit channel-enabling flexible memory bank selection or clock domain isolation. |
| High sink current capability | 64 mA per output supports direct interface to legacy TTL loads, LED indicators, or relay drivers without external transistor buffers. |
Applications
| Memory Address Buffering | System Clock Distribution |
|---|---|
Use Scenario: Driving 16-bit address buses in microprocessor-based systems with multiple memory banks or peripherals. IC Role / Device Role / Timing Role: Non-inverting octal buffer providing fan-out expansion and noise-immune signal integrity for address lines. Use Value: Eliminates need for external 3-state timing control logic and reduces PCB layout complexity by removing overlap protection circuitry. | Use Scenario: Distributing a single system clock to multiple synchronous logic blocks requiring identical edge timing. IC Role / Device Role / Timing Role: Low-skew, high-current buffer ensuring simultaneous clock arrival across multiple receivers. Use Value: 6 ns max tPHL enables sub-10 ns skew between outputs-critical for setup/hold compliance in 20+ MHz synchronous designs. |
| Bus Transceiver Interface | Legacy TTL System Expansion |
Use Scenario: Interfacing microcontroller GPIOs to shared data/address buses using wired-AND logic for multi-master arbitration. IC Role / Device Role / Timing Role: Open-collector driver enabling bidirectional bus control without direction pins or external transceivers. Use Value: Built-in open-collector outputs replace discrete transistor arrays, reducing component count and improving reliability in bus arbitration circuits. | Use Scenario: Upgrading aging industrial controllers using obsolete 74LS/ALS parts while retaining existing PCB layouts and firmware. IC Role / Device Role / Timing Role: Pin-compatible AS-series replacement offering faster propagation and higher drive strength than 74ALS760. Use Value: Direct drop-in upgrade path with 3× higher sink current (64 mA vs. 24 mA) and 30% lower propagation delay-extending life of legacy hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal open-collector buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALS760DW | Lower drive (24 mA), slower speed (tPHL ≤ 7 ns), same pinout and voltage specs | Compatible in legacy 74ALS systems where reduced current suffices; not suitable for high-capacitance or high-frequency loads | Select when cost sensitivity outweighs performance needs and board-level timing margins are generous. |
| SN74AS244N | Same family, but 8-channel non-inverting buffer with 3-state (not open-collector) outputs; different pinout and control logic | Requires redesign for 3-state timing management; unsuitable for wired-AND or level-shifting use cases | Choose only if system already uses 3-state bus architecture and open-collector functionality is unnecessary. |
Compared with SN74ALS760DW and SN74AS244N, the SN74AS760DW uniquely combines high-current open-collector outputs with dual independent OE controls-making it the only option among the three that eliminates 3-state overlap risk while delivering 64 mA sink capability for demanding legacy bus interfaces.
Availability
SN74AS760DW is available at Aetrix Electronics and suitable for memory address buffering, system clock distribution, and legacy TTL system expansion requiring stable component supply and long-term obsolescence mitigation.
Supply support for SN74AS760DW 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with over 90 years of innovation in industrial, automotive, and communications markets.
The SN74AS760DW belongs to TI's advanced Schottky (AS) logic family, engineered for high-speed, high-drive applications in memory subsystems and bus-oriented digital systems where reliability and timing precision are critical.
FAQ
What is the maximum sink current per output of the SN74AS760DW?
The SN74AS760DW supports up to 64 mA per open-collector output under recommended operating conditions (VCC = 4.5 V, IOL = 64 mA), with VOL guaranteed ≤ 0.55 V. This enables direct driving of multiple TTL inputs, LEDs, or small relays without external amplification. The SN74AS760DW's high sink capability distinguishes it from lower-drive variants like the SN74ALS760DW.
Is the SN74AS760DW pin-compatible with the SN74ALS760DW?
Yes, the SN74AS760DW is pin-compatible with the SN74ALS760DW in the DW package: identical 20-pin SOIC footprint, matching pin functions (1OE, 1A1–1A4, 1Y1–1Y4, etc.), and shared VCC/GND locations. This allows direct replacement in existing designs where higher drive strength and faster timing are needed without PCB modification.
Does the SN74AS760DW require external pull-up resistors on its outputs?
Yes, the SN74AS760DW features open-collector outputs and requires external pull-up resistors to establish logic HIGH levels. Typical values range from 1 kΩ to 10 kΩ depending on bus capacitance and rise-time requirements. Without pull-ups, outputs remain floating when not actively sinking current-making proper termination essential for deterministic logic behavior in the SN74AS760DW.
What is the operating temperature range for the SN74AS760DW?
The SN74AS760DW is rated for commercial operation from 0°C to 70°C, as confirmed in the SDAS141A datasheet. This range aligns with standard industrial and embedded computing environments. For extended temperature applications (−55°C to 125°C), the military-grade SN54AS760 variant is available-but it uses ceramic packages (J or FK) and is not pin-compatible with the SN74AS760DW's SOIC DW package.
Can the SN74AS760DW be used as a level shifter between 5 V and 3.3 V logic?
No-the SN74AS760DW is a 5 V-only device with VIH = 2 V and VIL = 0.8 V, and its outputs are open-collector but not 3.3 V tolerant. While external pull-up to 3.3 V is possible, the input thresholds and internal logic are designed for 5 V TTL compatibility. Using the SN74AS760DW in mixed-voltage systems risks incorrect logic interpretation or damage if 5 V signals are applied to 3.3 V receivers without isolation. Dedicated level translators are recommended instead.
SN74AS760DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AS
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- Open Collector
- Current - Output High, Low:
- -, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74AS760DW FAQ
1.How can I place an order for SN74AS760DW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AS760DW 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 SN74AS760DW reliable?
The price and inventory of SN74AS760DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AS760DW is usually 5 days.
3.What payment methods are accepted for SN74AS760DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AS760DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AS760DW?
SN74AS760DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AS760DW 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 SN74AS760DW?
For technical support, including SN74AS760DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AS760DW requirements.
6.How does Aetrix verify that SN74AS760DW is sourced from the original manufacturer or authorized distributors?
All SN74AS760DW 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 SN74AS760DW meets industry standards.
7.What is the process for return or replacement of SN74AS760DW?
All SN74AS760DW units undergo pre-shipment inspection (PSI). If there is an issue with SN74AS760DW, 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 SN74AS760DW part is unused and in its original packaging.
Return procedure for SN74AS760DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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