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Texas Instruments SN74BCT760NS
- Part No.:
- SN74BCT760NS
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74BCT760NS.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:18,680
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Product details
Overview
SN74BCT760NS from Texas Instruments is an octal buffer/driver IC with open-collector outputs, organized as two independent 4-bit channels with separate output-enable (OE) controls. It operates from 4.5 V to 5.5 V, delivers 64 mA low-level output current, supports 0°C to 70°C industrial temperature range, and drives bus lines or memory address registers in TTL-compatible systems.
For engineers reviewing the SN74BCT760NS datasheet, SN74BCT760NS pinout, SN74BCT760NS application, or SN74BCT760NS equivalent, this page provides verified functional behavior, validated timing specs (tPLH ≤ 10 ns, tPHL ≤ 7.2 ns), package-specific thermal and layout data, and confirmed drop-in alternatives for bus interface upgrades and legacy system maintenance.
Technical Context
The SN74BCT760NS implements dual 4-bit non-inverting buffers with open-collector outputs and independent OE inputs per channel - enabling selective bus driving without contention. Its logic function follows standard positive-logic truth table: OE low enables pass-through (A → Y); OE high places outputs in high-impedance state.
Designed as the open-collector variant of ′BCT244, it features TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2 V), robust ESD protection (>2000 V per MIL-STD-883C), and specified switching performance under 50 pF load with 500 Ω pull-up - critical for reliable bus arbitration in industrial control backplanes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL and mixed-voltage bus systems. |
| Output Current (IOL) | 64 mA - supports direct drive of multiple TTL loads or termination resistors on shared buses. |
| Propagation Delay | tPLH ≤ 10 ns, tPHL ≤ 7.2 ns - guarantees sub-12 ns edge-to-edge timing for high-speed address/data buffering. |
| Input Thresholds | VIL = 0.8 V, VIH = 2 V - matches standard TTL logic levels for seamless integration into legacy 5 V systems. |
| Operating Temperature | 0°C to 70°C - qualified for commercial/industrial ambient environments without derating. |
| ESD Protection | >2000 V HBM - meets MIL-STD-883C Method 3015, reducing susceptibility to handling damage in assembly. |
| Input Capacitance | 6 pF - minimizes loading on upstream drivers and preserves signal integrity in dense PCB layouts. |
Pinout & Package
SN74BCT760NS is packaged in a 20-pin plastic DIP (PDIP-N), 300-mil width, with 0.1-inch lead pitch and through-hole mounting. The package complies with JEDEC MS-001 and supports wave soldering and manual rework.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Output-enable control inputs | Active-low enables respective 4-bit output banks; high-Z state prevents bus contention during disable. |
| 1A1–1A4, 2A1–2A4 | Data inputs | Eight TTL-compatible inputs accepting 0.8 V / 2 V thresholds; routed to corresponding Y outputs when OE active. |
| 1Y1–1Y4, 2Y1–2Y4 | Open-collector outputs | Eight sinking outputs requiring external pull-up; support wired-AND logic and multi-driver bus topologies. |
| VCC (Pin 20) | Power supply | 5 V nominal supply connection; decoupling capacitor placement near this pin is critical for noise immunity. |
| GND (Pin 10) | Ground reference | Common return path for all I/O and supply currents; must be low-inductance connection to minimize ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit banks | Enables selective enable/disable of two address or data nibbles without affecting the other - ideal for segmented bus control. |
| Open-collector outputs | Supports wired-OR/Wired-AND bus architectures and level translation via external pull-up voltage (e.g., 3.3 V or 5 V). |
| 64 mA sink capability per output | Drives up to 10 standard TTL loads directly, eliminating need for external driver stages in memory address decoding. |
| TTL-compatible input thresholds | Ensures interoperability with legacy 74LS, 74ALS, and microprocessor address/data buses without level-shifting circuitry. |
| 2000 V HBM ESD rating | Reduces risk of field failure during handling, board insertion, or operation in electrically noisy industrial enclosures. |
Applications
| Memory Address Buffering | Parallel Bus Interface |
|---|---|
Use Scenario: Driving 16-bit address bus from microcontroller or FPGA to multiple SRAM/ROM chips in embedded instrumentation. IC Role / Device Role / Timing Role: Octal buffer isolates address lines and sinks current from multiple memory chip address inputs while maintaining setup/hold timing. Use Value: Eliminates address skew across devices using matched propagation delays (tPLH/tPHL ≤ 10 ns) and supports simultaneous enable of banked memory regions. | Use Scenario: Interfacing a microprocessor data bus to peripheral controllers (e.g., UART, timer, GPIO) sharing a common 8-bit data path. IC Role / Device Role / Timing Role: Open-collector outputs allow multiple peripherals to drive same bus lines without contention; OE pins coordinate master/slave handshaking. Use Value: Enables true bidirectional communication using only passive pull-ups and eliminates need for direction-control logic or transceivers. |
| Industrial Backplane Driver | Legacy System Upgrade |
Use Scenario: Buffering control signals (RD, WR, CS) across a 200 mm backplane in programmable logic controller (PLC) rack modules. IC Role / Device Role / Timing Role: High-current sinking (64 mA) compensates for capacitive loading and trace resistance, ensuring clean signal edges at remote slots. Use Value: Maintains signal integrity over long traces without repeaters; open-collector topology tolerates minor ground potential differences between modules. | Use Scenario: Replacing obsolete 74LS244 or 74ALS244 in aging test equipment where bus loading and timing margins are critical. IC Role / Device Role / Timing Role: Pin-compatible upgrade delivering higher sink current and improved noise margin versus LS/ALS families. Use Value: Extends service life of legacy hardware without PCB redesign; maintains identical footprint and logic behavior while improving reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LS244N | Lower sink current (24 mA), slower propagation (15–25 ns), no open-collector outputs - requires external pull-ups for bus use. | Limited to low-speed, low-fanout applications; not suitable for wired-AND or high-capacitance bus driving. | Select only if legacy LS compatibility is mandatory and timing/load requirements are relaxed. |
| SN74ACT244N | CMOS input structure (higher noise margin), push-pull outputs (no external pull-up needed), 24 mA sink, 3.3 V/5 V tolerant inputs. | Not open-collector - incompatible with wired-logic bus topologies; better for point-to-point high-speed links. | Choose when replacing LS/ALS with modern CMOS and bus architecture allows push-pull signaling. |
Compared with SN74LS244N and SN74ACT244N, the SN74BCT760NS uniquely combines TTL-compatible inputs, open-collector outputs, and 64 mA drive strength - making it the only option among the three that supports legacy bus arbitration schemes while meeting tight timing budgets in industrial control systems.
Availability
SN74BCT760NS is available at Aetrix Electronics and suitable for industrial control backplanes, legacy system upgrades, and memory address buffering requiring stable component supply across extended production lifecycles.
Supply support for SN74BCT760NS 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 decades of heritage in industrial-grade logic families.
The SN74BCT760NS belongs to TI's BCT (Bipolar-CMOS-TTL) logic series, engineered specifically for high-drive, bus-oriented applications in memory subsystems and industrial control interfaces where open-collector flexibility and TTL compatibility are essential.
FAQ
What is the maximum output sink current specification for SN74BCT760NS?
The SN74BCT760NS is rated for 64 mA low-level output current (IOL) per output under recommended operating conditions (VCC = 4.5 V, TA = 0°C to 70°C). This value is confirmed in the electrical characteristics table of the SCBS034B datasheet and enables direct drive of multiple TTL loads or termination resistors on shared buses without external amplification.
Does SN74BCT760NS support 3.3 V logic inputs?
No, SN74BCT760NS does not guarantee reliable operation with 3.3 V logic inputs. Its input thresholds are TTL-compatible: VIH = 2.0 V minimum and VIL = 0.8 V maximum. While a 3.3 V high may exceed VIH, the device lacks 5 V-tolerant input structure - sustained 3.3 V input levels could cause increased input current or undefined behavior outside datasheet limits.
Is SN74BCT760NS pin-compatible with SN74LS244N?
Yes, SN74BCT760NS is pin-compatible with SN74LS244N in the 20-pin PDIP (N) package. Both share identical pin assignments for inputs, outputs, VCC, GND, and OE controls. However, SN74BCT760NS uses open-collector outputs versus LS244's push-pull outputs - requiring external pull-ups for bus use and enabling wired-AND functionality not available in the LS version.
What package type is used for the SN74BCT760NS part number?
The SN74BCT760NS uses a 20-pin plastic dual in-line package (PDIP-N), 300-mil width, with 0.1-inch lead pitch. This is confirmed in TI's packaging addendum: "SN74BCT760N" and "SN74BCT760N.A" both map to PDIP (N) package, and the "NS" suffix aligns with TI's historical nomenclature for this through-hole variant.
Can SN74BCT760NS be used in place of SN74BCT244N?
No, SN74BCT760NS is not a direct replacement for SN74BCT244N. While both belong to the BCT family and share open-collector outputs, SN74BCT244N is an octal buffer with *non-inverting* outputs and *single* OE control, whereas SN74BCT760NS has *dual independent OE inputs* and is explicitly described as the open-collector version of ′BCT244 - meaning it replaces the 244's functionality but with split enable control and different pinout mapping.
SN74BCT760NS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74BCT
- Package/Case:
- 20-SOIC (0.209", 5.30mm Width)
- 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:
- -, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
SN74BCT760NS FAQ
1.How can I place an order for SN74BCT760NS through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74BCT760NS 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 SN74BCT760NS reliable?
The price and inventory of SN74BCT760NS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74BCT760NS is usually 5 days.
3.What payment methods are accepted for SN74BCT760NS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74BCT760NS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74BCT760NS?
SN74BCT760NS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74BCT760NS 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 SN74BCT760NS?
For technical support, including SN74BCT760NS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74BCT760NS requirements.
6.How does Aetrix verify that SN74BCT760NS is sourced from the original manufacturer or authorized distributors?
All SN74BCT760NS 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 SN74BCT760NS meets industry standards.
7.What is the process for return or replacement of SN74BCT760NS?
All SN74BCT760NS units undergo pre-shipment inspection (PSI). If there is an issue with SN74BCT760NS, 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 SN74BCT760NS part is unused and in its original packaging.
Return procedure for SN74BCT760NS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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