My Inquiry
My Account
Texas Instruments SN74ALS763N
- Part No.:
- SN74ALS763N
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SN74ALS763N.pdf
- Description:
- BUS DRIVER, ALS SERIES
- Quantity:
- Payment:
- Shipping:
Inventory:1,215
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ALS763N from Texas Instruments is an octal buffer/line driver with complementary G and G̅ inputs, designed for memory address bus driving and clock distribution in TTL-compatible systems. It features open-collector outputs capable of sinking up to 24 mA (48 mA for -1 variants), operates from 0°C to 70°C, and uses a 20-pin plastic DIP (N) package.
For engineers reviewing the SN74ALS763N datasheet, SN74ALS763N pinout, SN74ALS763N application, or SN74ALS763N equivalent, this page delivers verified electrical specs, true pin mapping, bus-driving use cases, and validated alternatives for legacy system maintenance and industrial control upgrades.
Technical Context
The SN74ALS763N implements dual 4-bit noninverting buffers with independent active-low output-enable controls (1G and 2G/2G̅), where each G/G̅ pair enables complementary control of its respective 4-bit channel. Its open-collector outputs eliminate 3-state overlap timing constraints in shared-bus architectures.
It belongs to the ALS (Advanced Low-Power Schottky) logic family, delivering faster propagation delays (tPLH/tPHL down to 5–7 ns) and lower power consumption than standard LS TTL, while maintaining full 5-V TTL voltage-level compatibility for VIH ≥ 2 V and VIL ≤ 0.8 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures stable operation across standard 5-V supply tolerances without level-shifting. |
| IOL (Max) | 24 mA per output - Supports direct drive of multiple TTL loads or termination resistors on parallel buses. |
| tPHL (A→Y) | 2 ns min / 9 ns max - Enables reliable high-speed address or clock buffering at >20 MHz toggle rates. |
| VOL @ IOL=24 mA | 0.4 V max - Guarantees solid low-state margin below 0.8 V VIL threshold for downstream TTL inputs. |
| ICC (Outputs High) | 7 mA typical - Low quiescent current reduces thermal load in dense memory interface designs. |
| Operating Temp | 0°C to 70°C - Qualified for commercial-grade embedded systems and industrial control panels. |
| Package | 20-pin PDIP (N) - Through-hole mounting compatible with legacy PCBs and manual rework workflows. |
Pinout & Package
SN74ALS763N uses a 20-pin plastic dual in-line package (PDIP, suffix N), with 0.3-inch body width and standard through-hole lead spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1G | Active-low enable for Channel 1 (pins 2, 4, 6, 8 → outputs 18, 16, 14, 12) |
| 2, 4, 6, 8 | 1A1–1A4 | Noninverting inputs for Channel 1 outputs |
| 12, 14, 16, 18 | 1Y1–1Y4 | Open-collector outputs for Channel 1 (active-low logic polarity) |
| 3, 5, 7, 9 | 2Y4–2Y1 | Open-collector outputs for Channel 2 (mirrored pin order) |
| 11, 13, 15, 17 | 2A1–2A4 | Noninverting inputs for Channel 2 |
| 19 | 2G/2G̅ | Complementary enable pair: 2G active-low, 2G̅ active-high for Channel 2 |
| 10 | GND | Ground reference for all logic and output stages |
| 20 | VCC | +5 V supply for internal logic and output pull-down transistors |
Key Features
| Feature | Design Value |
|---|---|
| Complementary G/G̅ inputs | Enables flexible channel enable logic-either active-low (2G) or active-high (2G̅) control for Channel 2 without external inverters. |
| Open-collector outputs | Allows wired-AND bus configurations and direct interface to higher-voltage peripherals (e.g., 12-V address latches) using external pull-ups. |
| No 3-state overlap requirement | Eliminates need for precise timing coordination between enable signals-reduces design risk in multi-driver bus systems. |
| ALS logic family | Delivers 2× speed improvement over LS TTL with comparable power, enabling faster memory access cycles in retro-computing and test equipment. |
| Industrial temperature range | Validated operation from 0°C to 70°C ensures reliability in fanless enclosures and factory-floor controllers without derating. |
Applications
| Memory Address Buffering | Clock Distribution Network |
|---|---|
|
Use Scenario: Driving 16-bit address bus lines from a microprocessor to multiple memory chips in a legacy industrial PLC. IC Role / Device Role / Timing Role: Noninverting octal buffer providing current gain and noise immunity for parallel address signals. Use Value: Open-collector outputs allow shared bus arbitration via external pull-up; complementary G/G̅ simplifies enable sequencing with FPGA or CPLD control logic. |
Use Scenario: Distributing a master system clock to four synchronous peripheral ICs in a test instrumentation rack. IC Role / Device Role / Timing Role: Low-skew, fan-out buffer isolating clock source from capacitive loading of multiple receivers. Use Value: 2 ns minimum tPHL ensures sub-10 ns edge alignment across all eight outputs-critical for setup/hold timing in 25-MHz synchronous designs. |
| Bus Transceiver Interface | Legacy System Upgrade |
|
Use Scenario: Interfacing a modern microcontroller's GPIO port to a vintage 8-bit data bus operating at TTL levels. IC Role / Device Role / Timing Role: Level-translating buffer with current-sinking capability matching original system drive strength. Use Value: 24-mA sink current matches original 74LS244 specs, ensuring signal integrity without redesigning bus termination networks. |
Use Scenario: Replacing obsolete SN74LS763 in a field-deployed medical analyzer requiring long-term component availability. IC Role / Device Role / Timing Role: Pin- and function-compatible drop-in replacement preserving PCB layout and firmware. Use Value: Identical pinout, voltage thresholds, and timing parameters enable zero-change hardware revision-reducing qualification time and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AS763N | Faster tPHL (1 ns min vs. 2 ns), higher IOL (64 mA), but 2× higher ICC (52 mA vs. 7 mA typical). | Better suited for high-speed, high-drive applications; less suitable for low-power or thermally constrained designs. | Select SN74AS763N only when propagation delay <6 ns and sink current >48 mA are required-and thermal budget allows. |
| SN74LS763N | Slower tPHL (15 ns max), lower IOL (8 mA), identical pinout and logic function. | Compatible with older designs where speed is not critical; cannot replace SN74ALS763N in timing-critical paths. | Use SN74LS763N only for cost-sensitive, low-frequency retrofits where ALS speed/power advantages are unnecessary. |
Compared with SN74ALS763N, SN74AS763N trades higher power for superior speed and drive strength, while SN74LS763N offers legacy compatibility at reduced performance-making SN74ALS763N the optimal balance for mid-speed industrial bus buffering with thermal efficiency.
Availability
SN74ALS763N is available at Aetrix Electronics and suitable for memory interface design, clock distribution networks, and legacy system maintenance requiring stable component supply and long-term obsolescence mitigation.
Supply support for SN74ALS763N 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, delivering analog, embedded processing, and logic solutions with rigorous quality certification and military-grade reliability heritage.
The SN74ALS763N belongs to TI's Advanced Low-Power Schottky (ALS) logic product line, engineered for high-speed, low-power bus interfacing in industrial control, test equipment, and computing systems from the 1980s onward.
FAQ
What is the maximum output sink current for SN74ALS763N under recommended operating conditions?
The SN74ALS763N supports a guaranteed low-level output current (IOL) of 24 mA per output at VCC = 4.5 V and VOL ≤ 0.4 V. This rating applies across the full 0°C to 70°C operating range and ensures robust drive capability into standard TTL loads without external amplification. The 48-mA rating is exclusive to the SN74ALS763N-1 variant and requires VCC stabilization between 4.75 V and 5.25 V.
Does SN74ALS763N support true 3-state operation?
No, SN74ALS763N does not provide 3-state (high-impedance) outputs. It features open-collector outputs that either sink current (logic low) or float (requiring external pull-up resistors for logic high). This architecture eliminates 3-state overlap timing concerns but mandates external pull-ups for bus-wired logic-unlike 3-state buffers such as SN74ALS244.
Can SN74ALS763N be used as a direct replacement for SN74LS763N?
Yes, SN74ALS763N is pin-compatible and functionally identical to SN74LS763N, with identical pinout, input thresholds, and logic behavior. It improves upon the LS version with faster propagation delays (2 ns min tPHL vs. 15 ns max), lower power consumption (7 mA ICC vs. ~20 mA), and higher output drive (24 mA vs. 8 mA), making it a performance-enhancing drop-in upgrade.
What is the purpose of the complementary 2G/2G̅ inputs on SN74ALS763N?
The 2G (active-low) and 2G̅ (active-high) inputs on SN74ALS763N provide dual-enable flexibility for Channel 2: designers may use either signal depending on upstream control logic polarity-eliminating the need for discrete inverters. This feature simplifies interface design with microcontrollers, FPGAs, or legacy PALs that generate enable signals in either polarity.
Is SN74ALS763N suitable for automotive applications?
No, SN74ALS763N is not qualified for automotive use. It is rated for the commercial temperature range (0°C to 70°C) and lacks AEC-Q100 qualification or ISO/TS 16949 compliance. For automotive environments, TI recommends automotive-grade alternatives such as SN74AHCT541-Q1, which meet extended temperature, ESD, and reliability requirements mandated by automotive OEMs.
SN74ALS763N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74ALS763N FAQ
1.How can I place an order for SN74ALS763N through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALS763N 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 SN74ALS763N reliable?
The price and inventory of SN74ALS763N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALS763N is usually 5 days.
3.What payment methods are accepted for SN74ALS763N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALS763N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALS763N?
SN74ALS763N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALS763N 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 SN74ALS763N?
For technical support, including SN74ALS763N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALS763N requirements.
6.How does Aetrix verify that SN74ALS763N is sourced from the original manufacturer or authorized distributors?
All SN74ALS763N 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 SN74ALS763N meets industry standards.
7.What is the process for return or replacement of SN74ALS763N?
All SN74ALS763N units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALS763N, 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 SN74ALS763N part is unused and in its original packaging.
Return procedure for SN74ALS763N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ALS763N Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
