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Texas Instruments SN74ALS760DWR
- Part No.:
- SN74ALS760DWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74ALS760DWR.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,602
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Product details
Overview
SN74ALS760DWR from Texas Instruments is an octal buffer/line driver IC with open-collector outputs, designed for memory address bus driving and clock distribution in TTL-compatible systems. It features dual 4-bit non-inverting channels, symmetrical active-low output-enable (OE) inputs, pnp input structure for reduced DC loading, and operates at 4.5 V to 5.5 V over 0°C to 70°C.
For engineers reviewing the SN74ALS760DWR datasheet, SN74ALS760DWR pinout, SN74ALS760DWR application, or SN74ALS760DWR equivalent, key selection considerations include open-collector drive capability (24 mA sink), propagation delay (5–15 ns), bus-oriented timing behavior, and compatibility with legacy ALS logic families in industrial control and instrumentation bus interfaces.
Technical Context
The SN74ALS760DWR implements two independent 4-bit non-inverting buffer sections, each with dedicated active-low output-enable control (1OE and 2OE). Its pnp input stage minimizes input current draw, enabling higher fan-out without compromising signal integrity on shared buses.
Open-collector outputs allow wired-AND logic implementation and direct interfacing with higher-voltage buses (up to 7 V off-state), while eliminating need for external 3-state overlap protection circuitry-critical for reliable address/data bus arbitration in memory subsystems and peripheral controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 4.5 V to 5.5 V - Ensures stable operation within standard TTL power rail tolerances. |
| Output sink current | 24 mA - Supports direct drive of multiple TTL loads or termination resistors on 5 V buses. |
| Propagation delay | 5 ns to 15 ns - Enables high-speed address buffering in 20–30 MHz memory access cycles. |
| Input voltage thresholds | VIL = 0.8 V, VIH = 2.0 V - Guarantees robust noise margin against TTL-level logic transitions. |
| Operating temperature | 0°C to 70°C - Qualified for commercial-grade embedded systems and industrial control panels. |
| Output configuration | Open-collector - Allows bus sharing, level translation, and wired-logic functions without external pull-ups required for basic operation. |
Pinout & Package
SN74ALS760DWR 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; low enables outputs, high places them in high-impedance state. |
| 1A1–1A4, 2A1–2A4 | Input terminals | Non-inverting data inputs for Channel 1 (pins 2,4,6,8) and Channel 2 (pins 19,17,15,13). |
| 1Y1–1Y4, 2Y1–2Y4 | Open-collector outputs | Corresponding buffered outputs (pins 18,16,14,12 and 9,7,5,3); require external pull-up for logic HIGH. |
| VCC (pin 20) | Power supply | Positive supply connection for internal logic; must be decoupled locally per best practice. |
| GND (pin 10) | Ground reference | Common return path for all inputs, outputs, and internal circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Open-collector outputs | Enable bus arbitration, wired-AND logic, and interface with mixed-voltage systems up to 7 V off-state. |
| pnp input structure | Reduces input current to ≤0.1 mA, allowing >20 fan-out into standard TTL loads without signal degradation. |
| Dual independent OE controls | Permits selective activation of either 4-bit channel-ideal for interleaved memory addressing or dual-bank peripheral control. |
| No 3-state overlap protection needed | Eliminates external diodes or timing delays when enabling/disabling multiple drivers on same bus. |
| ALS family compatibility | Pin- and function-compatible with SN74ALS244 and SN74AS244, easing drop-in upgrades in legacy designs. |
Applications
| Memory Address Buffering | Industrial Bus Interface |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or EPROM chips on a shared bus. IC Role / Device Role / Timing Role: Non-inverting octal buffer with independent OE control ensures glitch-free address latching during bank switching. Use Value: Open-collector outputs prevent bus contention during address transitions; 24 mA sink supports parallel termination and multi-drop routing. | Use Scenario: Interfacing a PLC CPU module with discrete I/O expansion racks using a proprietary parallel backplane bus. IC Role / Device Role / Timing Role: Level-shifting and fan-out buffer for control signals across noisy industrial environments. Use Value: pnp inputs reduce loading on upstream drivers; 15 ns max propagation delay maintains deterministic timing across 10+ node backplanes. |
| Legacy System Clock Distribution | Test Equipment Signal Conditioning |
Use Scenario: Distributing a 10 MHz system clock to multiple logic analyzers, counters, and FPGA configuration modules. IC Role / Device Role / Timing Role: Low-skew, non-inverting clock driver with controlled edge rates via open-collector output impedance. Use Value: Symmetrical tPLH/tPHL (5–12 ns) minimizes clock skew between channels; 5 V tolerant outputs interface directly with older test gear. | Use Scenario: Conditioning digital trigger and strobe signals in automated test equipment before routing to DUT interface connectors. IC Role / Device Role / Timing Role: Isolating and amplifying low-current control signals from MCU GPIOs to drive relay coils or optocouplers. Use Value: 24 mA sink capability drives 5 V relays directly; independent OE pins allow synchronized enable/disable of groups of test signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALS244N | Same ALS family, identical pinout and electrical specs, but lacks dual independent OE-uses single OE for all 8 outputs. | Suitable only where simultaneous enable/disable of all buffers is acceptable; not for split-channel control. | Select SN74ALS244N only if board layout uses single OE net and timing constraints permit full-channel gating. |
| SN74AS760DWR | Faster propagation (1–7 ns vs. 5–15 ns), higher output drive (64 mA), but increased ICC (60–94 mA vs. 9–19 mA) and no pnp input benefit. | Better for high-speed bus timing-critical paths; less suitable for low-power or high-fan-out legacy systems. | Choose SN74AS760DWR when speed outweighs power and loading concerns-e.g., in new designs targeting >25 MHz operation. |
Compared with SN74ALS244N, SN74ALS760DWR provides finer-grained channel control and lower input loading; versus SN74AS760DWR, it trades speed for lower power and superior DC fan-out-making it optimal for cost-sensitive, noise-tolerant industrial bus interfaces where timing margins exceed 15 ns.
Availability
SN74ALS760DWR is available at Aetrix Electronics and suitable for industrial control panels, legacy test equipment refurbishment, and memory subsystem upgrades requiring stable component supply and long-term obsolescence management.
Supply support for SN74ALS760DWR 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 50 years of industrial-grade product heritage.
The SN74ALS760DWR belongs to TI's legacy Advanced Low-Power Schottky (ALS) logic family, engineered for high-density, low-power bus interface applications in commercial-temperature industrial and instrumentation systems.
FAQ
What is the maximum sink current per output of the SN74ALS760DWR?
The SN74ALS760DWR supports a guaranteed minimum output sink current of 24 mA per open-collector output at VCC = 4.5 V and VOL ≤ 0.5 V. This allows direct drive of multiple TTL inputs or termination networks without external buffering, making SN74ALS760DWR well-suited for dense memory address bus applications where fan-out and noise immunity are critical.
Does the SN74ALS760DWR require external pull-up resistors on its outputs?
Yes, the SN74ALS760DWR features open-collector outputs and requires external pull-up resistors to establish a defined HIGH logic level. Typical values range from 1 kΩ to 10 kΩ depending on bus capacitance and rise-time requirements. Without pull-ups, outputs remain floating when disabled or driven HIGH-so proper pull-up design is essential for reliable operation of SN74ALS760DWR in any bus-driven application.
Can the SN74ALS760DWR be used in place of the SN74ALS244?
Yes, the SN74ALS760DWR is functionally compatible with SN74ALS244 in most applications, sharing identical pinout, voltage ratings, and ALS family characteristics. However, SN74ALS760DWR offers dual independent OE inputs (1OE and 2OE) versus SN74ALS244's single OE, enabling more flexible channel control. When replacing SN74ALS244, tie unused OE to GND or VCC as needed-but verify timing and loading match for SN74ALS760DWR in your specific design.
What is the operating temperature range specified for the SN74ALS760DWR?
The SN74ALS760DWR is characterized for operation from 0°C to 70°C ambient temperature-the commercial grade specification. This range aligns with standard industrial control enclosures and office-environment test equipment. It is not rated for extended temperature operation like the military-grade SN54AS760 (−55°C to 125°C), so SN74ALS760DWR should be used only in thermally managed environments meeting this specification.
How does the pnp input structure of the SN74ALS760DWR improve system performance?
The pnp input structure in SN74ALS760DWR reduces input current to ≤0.1 mA (vs. ~1.6 mA in standard TTL), significantly lowering DC loading on upstream drivers. This allows one SN74ALS760DWR input to drive >20 other ALS inputs without signal degradation-enabling higher fan-out, cleaner bus waveforms, and reduced need for intermediate buffering. That characteristic makes SN74ALS760DWR especially valuable in large-scale memory address distribution networks.
SN74ALS760DWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALS
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74ALS760DWR FAQ
1.How can I place an order for SN74ALS760DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALS760DWR 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 SN74ALS760DWR reliable?
The price and inventory of SN74ALS760DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALS760DWR is usually 5 days.
3.What payment methods are accepted for SN74ALS760DWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALS760DWR transactions.
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4.How is shipping managed for SN74ALS760DWR?
SN74ALS760DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALS760DWR 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 SN74ALS760DWR?
For technical support, including SN74ALS760DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALS760DWR requirements.
6.How does Aetrix verify that SN74ALS760DWR is sourced from the original manufacturer or authorized distributors?
All SN74ALS760DWR 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 SN74ALS760DWR meets industry standards.
7.What is the process for return or replacement of SN74ALS760DWR?
All SN74ALS760DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALS760DWR, 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 SN74ALS760DWR part is unused and in its original packaging.
Return procedure for SN74ALS760DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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