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Texas Instruments SN74ALS760N
- Part No.:
- SN74ALS760N
- Manufacturer:
- Texas Instruments
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74ALS760N.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,498
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Product details
Overview
SN74ALS760N 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 4.5–5.5 V over 0°C to 70°C.
For engineers reviewing the SN74ALS760N datasheet, SN74ALS760N pinout, SN74ALS760N application, or SN74ALS760N equivalent, key selection criteria include open-collector drive capability (24 mA sink), propagation delay (5–15 ns), 20-pin PDIP package compatibility, and elimination of 3-state overlap protection in bus interface designs.
Technical Context
The SN74ALS760N 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 DC loading on preceding logic, while open-collector outputs allow wired-AND bus interfacing and direct connection to memory address registers without external pull-ups in many configurations.
It belongs to the 74ALS family and is functionally aligned with the ′ALS244 and ′AS244, but adds dual OE control and eliminates need for external 3-state overlap circuitry. Timing behavior is specified under 50 pF load and 500 Ω termination, with tPLH/tPHL ranging 5–15 ns and enable/disable times up to 16 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage (VCC) | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL systems while allowing margin for rail tolerance. |
| Output Sink Current (IOL) | 24 mA - Supports direct driving of multiple TTL inputs or bus lines without external buffers. |
| Propagation Delay (tPLH/tPHL) | 5 ns (min) to 15 ns (max) - Enables high-speed address or clock buffering in memory subsystems. |
| Input Voltage Thresholds | VIL = 0.8 V, VIH = 2.0 V - Matches standard TTL logic levels for seamless integration with legacy 74-series devices. |
| Operating Temperature | 0°C to 70°C - Qualified for commercial-grade industrial and computing applications. |
| Output Structure | Open-collector - Allows wired-AND bus arbitration, level translation, and shared-line driving without contention. |
| DC Input Loading | pnp input stage - Reduces input current to ≤ ±0.1 mA, minimizing loading on upstream drivers. |
Pinout & Package
SN74ALS760N is supplied in a 20-pin plastic dual in-line package (PDIP, N package), 300-mil width, with standard through-hole mounting and 0.1-inch pin pitch.
| 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 | Eight buffered data inputs across two groups; non-inverting logic transfer to corresponding Y outputs. |
| 1Y1–1Y4, 2Y1–2Y4 | Open-collector outputs | Eight open-collector outputs; require external pull-up for HIGH-level assertion; support bus-wiring. |
| VCC (Pin 10), GND (Pin 20) | Power supply terminals | Single 5 V supply; decoupling recommended near Pin 10 to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit channels | Enables separate control of two memory banks or peripheral address segments using discrete OE signals. |
| Open-collector outputs | Permits wired-AND bus structures, I²C-like arbitration, and voltage-level flexibility via external pull-up selection. |
| pnp input structure | Reduces input current to ≤ 20 µA high-level and ≤ −0.1 mA low-level, easing drive requirements from prior-stage logic. |
| No 3-state overlap protection needed | Eliminates external diodes or timing delays when enabling/disabling multiple drivers on shared buses. |
| TTL-compatible thresholds & drive | Direct drop-in replacement for legacy 74LS/74ALS address drivers without level-shifting or redesign. |
Applications
| Memory Address Buffering | System Clock Distribution |
|---|---|
|
Use Scenario: Driving 16-bit address bus lines from microprocessor or DMA controller outputs in 1980s–1990s embedded systems. IC Role / Device Role / Timing Role: Non-inverting octal buffer with dual OE control, isolating CPU address outputs from memory chip select logic. Use Value: Eliminates need for external 3-state overlap circuitry and supports simultaneous multi-chip addressing with precise enable sequencing. |
Use Scenario: Distributing synchronized clock signals to multiple memory chips or peripheral controllers in bus-based architectures. IC Role / Device Role / Timing Role: Low-skew, open-collector clock driver providing fanout >8 with matched propagation delay across all outputs. Use Value: Maintains signal integrity across distributed loads and allows series-termination or pull-up configuration per destination requirement. |
| Bus Transceiver Interface | Legacy Peripheral Control |
|
Use Scenario: Implementing bidirectional data bus arbitration in systems where multiple masters share a common data path. IC Role / Device Role / Timing Role: Open-collector line driver used in conjunction with complementary receivers to form half-duplex bus nodes. Use Value: Enables wired-AND collision detection and deterministic bus release without additional logic gates or timing constraints. |
Use Scenario: Controlling discrete I/O lines for legacy peripherals such as parallel printers, floppy disk controllers, or ISA-bus expansion cards. IC Role / Device Role / Timing Role: Level-translating and current-boosting interface between microcontroller GPIO and higher-current peripheral inputs. Use Value: Provides 24 mA sink capability per output to directly drive LEDs, relays, or optocouplers without external transistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALS244N | Single OE control for all 8 outputs; no dual-channel separation; identical ALS speed and drive. | Lacks independent channel enable - unsuitable where staggered or selective bus segment activation is required. | Choose SN74ALS244N only when unified enable suffices and board layout favors simpler control routing. |
| SN74AS760N | Faster propagation (1–7 ns vs. 5–15 ns); higher IOL (64 mA); higher ICC (60–94 mA vs. 9–19 mA); same pinout and function. | Better suited for high-speed memory subsystems but increases power and noise; requires tighter layout control. | Choose SN74AS760N when timing budget demands sub-10 ns delays and system can accommodate higher supply current. |
Compared with SN74ALS760N, SN74ALS244N simplifies control at the cost of channel flexibility, while SN74AS760N delivers superior speed and drive at increased power and noise sensitivity - both retain pin compatibility but differ in timing, current, and enable architecture.
Availability
SN74ALS760N is available at Aetrix Electronics and suitable for memory address buffering, clock distribution, bus interface, and legacy peripheral control requiring stable component supply and long-term obsolescence management.
Supply support for SN74ALS760N 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 founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN74ALS760N belongs to TI's 74ALS advanced low-power Schottky logic family, engineered for high-speed, low-power memory and bus interface applications in commercial temperature environments.
FAQ
What is the maximum sink current per output of the SN74ALS760N?
The SN74ALS760N supports a guaranteed minimum sink current of 24 mA per open-collector output at VO = 0.4 V and VCC = 4.5 V. This rating ensures reliable driving of multiple TTL inputs or direct connection to memory address lines without external buffering. The SN74ALS760N maintains this performance across its full operating temperature range of 0°C to 70°C.
Does the SN74ALS760N require external pull-up resistors on its outputs?
Yes, the SN74ALS760N requires external pull-up resistors on all open-collector outputs (1Y1–1Y4 and 2Y1–2Y4) to assert a HIGH logic level. The value depends on bus capacitance and rise-time requirements; typical values range from 1 kΩ to 10 kΩ. Without pull-ups, outputs remain floating in the HIGH state and cannot drive logic HIGH.
Can the SN74ALS760N be used as a direct replacement for the SN74LS244?
The SN74ALS760N is not a pin-compatible replacement for SN74LS244 due to different pin assignments and dual OE architecture. While both are octal buffers, SN74ALS760N has separate 1OE/2OE controls and rearranged I/O mapping. Direct substitution would require PCB layout changes. Use SN74ALS244N for true drop-in replacement with single OE.
What is the propagation delay variation between input-to-output and enable-to-output paths in the SN74ALS760N?
The SN74ALS760N specifies tPLH/tPHL from A to Y as 5–15 ns, and from OE to Y as 5–16 ns. This means enable-to-output delay is comparable to data-path delay, supporting tight timing margins in bus arbitration and memory enable sequencing. Both paths are characterized under identical conditions: VCC = 4.5–5.5 V, CL = 50 pF, RL = 500 Ω.
Is the SN74ALS760N RoHS compliant?
Yes, the SN74ALS760N is RoHS compliant, with lead finish of NiPdAu (NIPDAU) and exemption status confirmed in TI's official packaging documentation. It meets EU Directive 2011/65/EU requirements and carries no lead-based solder finish. The part marking "SN74ALS760N" appears on the body, and it ships in tube packaging with 20 units per tube.
SN74ALS760N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALS
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- 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:
- -, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-PDIP
SN74ALS760N FAQ
1.How can I place an order for SN74ALS760N through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALS760N 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 SN74ALS760N reliable?
The price and inventory of SN74ALS760N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALS760N is usually 5 days.
3.What payment methods are accepted for SN74ALS760N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALS760N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALS760N?
SN74ALS760N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALS760N 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 SN74ALS760N?
For technical support, including SN74ALS760N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALS760N requirements.
6.How does Aetrix verify that SN74ALS760N is sourced from the original manufacturer or authorized distributors?
All SN74ALS760N 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 SN74ALS760N meets industry standards.
7.What is the process for return or replacement of SN74ALS760N?
All SN74ALS760N units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALS760N, 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 SN74ALS760N part is unused and in its original packaging.
Return procedure for SN74ALS760N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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