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Texas Instruments SN74AS760DWR
- Part No.:
- SN74AS760DWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74AS760DWR.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,586
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Product details
Overview
SN74AS760DWR from Texas Instruments is a dual 4-bit non-inverting open-collector octal buffer/line driver designed for high-speed memory address and bus driving applications. It features two independent 4-bit channels, each with active-low output-enable (OE) control, operates at 4.5–5.5 V, delivers 64 mA sink current per output, and achieves propagation delays as low as 1 ns (tPHL) under loaded conditions. It eliminates 3-state overlap protection requirements in dense address-bus systems.
For engineers reviewing the SN74AS760DWR datasheet, SN74AS760DWR pinout, SN74AS760DWR application, or SN74AS760DWR equivalent, key selection criteria include its open-collector architecture, 0°C to 70°C industrial temperature range, SOIC-20 package, 64 mA output drive capability, and compatibility with legacy AS-family timing and logic families.
Technical Context
The SN74AS760DWR implements two independent 4-bit non-inverting buffer sections, each with separate active-low output-enable inputs (1OE and 2OE), enabling precise channel-level bus control. Its pnp-input structure reduces DC loading on preceding logic stages, while open-collector outputs support wired-AND configurations and direct interface to higher-voltage buses.
It is part of the 74AS logic family and shares architectural alignment with SN74AS244 and SN74AS757, but distinguishes itself via dual-channel OE control and optimized drive strength. Timing behavior is specified under 50 pF load and 500 Ω pull-up, with tPLH/tPHL ≤ 18.5 ns and enable/disable times ≤ 19.5 ns across the full operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74AS - high-speed bipolar TTL with improved noise immunity and speed over ALS |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V systems and tolerant of rail variation |
| Output Sink Current | 64 mA per output - sufficient to drive heavy capacitive loads or multiple TTL inputs directly |
| Propagation Delay | 1 ns (min tPHL) to 18.5 ns (max tPLH) - enables sub-50 MHz bus operation with margin |
| Operating Temperature | 0°C to 70°C - qualified for commercial/industrial ambient environments |
| Input Structure | pnp-based - reduces input current draw and minimizes loading on upstream drivers |
| Output Type | Open-collector - supports level translation, wired-AND, and bus arbitration without external diodes |
Pinout & Package
SN74AS760DWR is housed in a 20-pin SOIC (DW) package, 7.5 mm wide, with 1.27 mm pitch and 2.65 mm max height. Pin 1 is located at the top-left corner (quadrant Q1) in tape-and-reel orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output-enable inputs | Independent channel gating: pulling either low enables its four outputs; both high places all outputs in high-impedance state |
| 1A1–1A4, 2A1–2A4 | Buffer data inputs | Non-inverting inputs for each of the eight total buffer channels (two groups of four) |
| 1Y1–1Y4, 2Y1–2Y4 | Open-collector outputs | Collectively driven outputs requiring external pull-up; capable of sinking up to 64 mA each |
| VCC | Positive supply | 5 V nominal power rail connection; must be decoupled locally due to fast switching transients |
| GND | Ground reference | Signal and power return path; critical for noise control in high-speed bus applications |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit channels | Enables selective activation of two address or data sub-buses without inter-channel timing skew |
| 64 mA output sink capability | Drives up to 20 standard TTL loads or long PCB traces without external buffers |
| pnp input structure | Reduces input current to ≤ −1 mA (IIL), minimizing loading on clock or address generators |
| Eliminates 3-state overlap protection | Removes need for external delay circuits or sequencing logic when enabling/disabling bus drivers |
| SOIC-20 tape-and-reel packaging | Supports automated SMT assembly with 2000-unit reels and JEDEC-compliant land pattern (DW0020A) |
Applications
| Memory Address Buffering | Bus Line Driving |
|---|---|
Use Scenario: Driving 16-bit address lines from a microprocessor to multiple SRAM or EPROM chips in a shared-memory system. IC Role / Device Role / Timing Role: Non-inverting octal buffer providing fanout and voltage-level integrity between CPU and memory array. Use Value: 64 mA sink strength ensures reliable low-level signaling across 10 cm traces; open-collector outputs allow wired-OR expansion across memory banks. | Use Scenario: Isolating and strengthening bidirectional data bus segments in an ISA-like peripheral expansion architecture. IC Role / Device Role / Timing Role: Direction-controlled bus driver enabling clean signal transitions during read/write cycles without contention. Use Value: Dual OE inputs permit precise timing-aligned enable/disable of upper/lower byte lanes; sub-7 ns tPHL supports >20 MHz bus clocking. |
| Legacy System Bus Interface | Industrial Control Backplane |
Use Scenario: Interfacing modern FPGA I/O banks to legacy 5 V TTL backplanes with mixed logic families. IC Role / Device Role / Timing Role: Level-shifting and current-boosting buffer for unidirectional control signals (e.g., chip select, interrupt acknowledge). Use Value: Open-collector outputs tolerate 7 V off-state voltage, allowing safe interfacing to +12 V bus rails with appropriate pull-ups. | Use Scenario: Distributing synchronized timing or status signals across a modular PLC rack with daisy-chained modules. IC Role / Device Role / Timing Role: Robust signal repeater ensuring edge fidelity and noise margin over 30 cm ribbon-cable runs. Use Value: pnp inputs reduce source loading on master controller; 1 ns min tPHL preserves setup/hold timing budgets in deterministic real-time loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AS244DWR | Single 8-bit configuration with shared OE; no dual-channel OE separation | Lacks independent control of two 4-bit groups; less flexible for split-bus architectures | Select when unified enable suffices and board space favors single-OE layout |
| SN74ALS760DWR | Lower drive (24 mA), slower speed (15 ns max tPLH), same pinout and function | Better suited for low-power or cost-sensitive designs where 64 mA is unnecessary | Choose for reduced power consumption (ICC ≈ 32 mA vs. 94 mA) and relaxed timing margins |
Compared with SN74AS760DWR, SN74AS244DWR simplifies control logic but sacrifices channel granularity, while SN74ALS760DWR trades performance for lower ICC and thermal load-making it viable where bus loading and speed are less demanding.
Availability
SN74AS760DWR is available at Aetrix Electronics and suitable for memory address buffering, industrial backplane signal distribution, and legacy bus interface applications requiring stable component supply, long-lifecycle support, and RoHS-compliant SOIC packaging.
Supply support for SN74AS760DWR 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 high-reliability components.
The SN74AS760DWR belongs to TI's 74AS advanced Schottky logic product line, engineered for high-speed, low-skew digital interfacing in memory systems, industrial controllers, and retro-compatible computing platforms.
FAQ
What is the maximum sink current per output of the SN74AS760DWR?
The SN74AS760DWR supports up to 64 mA of low-level output current (IOL) per open-collector output when VCC = 4.5 V and VOL ≤ 0.55 V. This rating enables direct driving of multiple TTL loads or termination of long PCB traces without external amplification. The SN74AS760DWR maintains this drive strength across its full 0°C to 70°C operating range, making it suitable for industrial bus applications with variable thermal conditions.
Does the SN74AS760DWR require external pull-up resistors on its outputs?
Yes, the SN74AS760DWR requires external pull-up resistors on all open-collector outputs (1Y1–1Y4 and 2Y1–2Y4) to establish defined high-level voltages. Typical values range from 1 kΩ to 10 kΩ depending on bus capacitance and rise-time requirements. The SN74AS760DWR does not include internal pull-ups, and omitting external ones results in undefined logic states during high-impedance periods.
Can the SN74AS760DWR be used as a direct replacement for the SN74ALS760DWR?
The SN74AS760DWR is pin-compatible and functionally identical to the SN74ALS760DWR but offers higher performance: 64 mA vs. 24 mA output drive, faster propagation (1–18.5 ns vs. 5–15 ns), and higher ICC (up to 94 mA vs. 32 mA). The SN74AS760DWR may require updated thermal design and stronger decoupling due to increased dynamic current, but no PCB changes are needed for drop-in substitution in most legacy designs.
What is the recommended operating voltage range for the SN74AS760DWR?
The SN74AS760DWR is specified for reliable operation with a supply voltage (VCC) between 4.5 V and 5.5 V. Operation below 4.5 V risks marginal logic thresholds and increased propagation delay; above 5.5 V exceeds recommended limits and may accelerate parametric drift. The SN74AS760DWR achieves optimal speed and noise margin at VCC = 5.0 V, and its absolute maximum rating is 7 V - not for continuous use.
Is the SN74AS760DWR RoHS compliant and lead-free?
Yes, the SN74AS760DWR is RoHS compliant and features a NiPdAu (NIPDAU) lead finish, meeting JEDEC J-STD-020 moisture sensitivity Level-1 (unlimited floor life at <30°C/60% RH). It is rated for peak reflow temperatures up to 260°C and ships in large tape-and-reel format (2000 units per reel), fully supporting modern lead-free SMT assembly processes. The SN74AS760DWR carries no exemption codes and complies with EU Directive 2011/65/EU.
SN74AS760DWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AS
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
SN74AS760DWR FAQ
1.How can I place an order for SN74AS760DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AS760DWR 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 SN74AS760DWR reliable?
The price and inventory of SN74AS760DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AS760DWR is usually 5 days.
3.What payment methods are accepted for SN74AS760DWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AS760DWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AS760DWR?
SN74AS760DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AS760DWR 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 SN74AS760DWR?
For technical support, including SN74AS760DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AS760DWR requirements.
6.How does Aetrix verify that SN74AS760DWR is sourced from the original manufacturer or authorized distributors?
All SN74AS760DWR 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 SN74AS760DWR meets industry standards.
7.What is the process for return or replacement of SN74AS760DWR?
All SN74AS760DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AS760DWR, 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 SN74AS760DWR part is unused and in its original packaging.
Return procedure for SN74AS760DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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