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Texas Instruments SN74BCT760N
- Part No.:
- SN74BCT760N
- Manufacturer:
- Texas Instruments
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74BCT760N.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,563
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Product details
Overview
SN74BCT760N from Texas Instruments is an octal buffer/driver IC with open-collector outputs, organized as two independent 4-bit sections, each with dedicated output-enable (OE) control. It operates at 4.5–5.5 V, supports 64 mA low-level output current, and is rated for 0°C to 70°C operation in a 20-pin PDIP package. It drives bus lines and memory address registers in TTL-compatible systems.
For engineers reviewing the SN74BCT760N datasheet, SN74BCT760N pinout, SN74BCT760N application, or SN74BCT760N equivalent, this page delivers verified electrical specs, functional truth table behavior, thermal limits, switching timing (tPLH/tPHL), and real-world use context for bus buffering and address driver replacement in legacy industrial and computing designs.
Technical Context
The SN74BCT760N implements dual 4-bit non-inverting buffers with open-collector outputs and separate OE inputs per section. Its logic function follows standard positive-logic enable: when OE is low, A→Y data passes; when OE is high, outputs enter high-impedance state. No internal pull-ups are present - external pull-up resistors are required for wired-AND or bus driving.
It belongs to the BCT (Bipolar CMOS-TTL) family, combining bipolar input stages for TTL-level compatibility and CMOS output stages for higher drive capability. The device exhibits 6 pF input capacitance and 10 pF output capacitance, with propagation delays as low as 2.1 ns (tPHL) and up to 10 ns (tPLH) under 5 V/50 pF load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - must be regulated within this range for guaranteed logic thresholds and output drive. |
| Output Current (IOL) | 64 mA per output - enables direct drive of multiple TTL loads or termination-resistor networks on shared buses. |
| Propagation Delay | 2.1–10 ns - supports bus speeds up to ~50 MHz in point-to-point configurations with proper load matching. |
| Input Voltage Thresholds | VIL = 0.8 V, VIH = 2.0 V - fully compatible with standard TTL logic families without level shifting. |
| Operating Temperature | 0°C to 70°C - suitable for commercial-grade embedded controllers, test equipment, and legacy computer peripherals. |
| ESD Protection | >2000 V per MIL-STD-883C Method 3015 - provides robust handling margin during manual PCB assembly and board-level integration. |
| Package Type | 20-pin PDIP (N) - through-hole mounting compatible with wave soldering and breadboard prototyping. |
Pinout & Package
SN74BCT760N is supplied in a 20-pin plastic dual in-line package (PDIP), 300-mil width, with standard DIP pin spacing (0.1" pitch). Pin 1 is located at the top-left corner marked by a notch or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE | Output-enable input (Section 1) | Active-low control: pulls all Y1–Y4 outputs to high-Z when high; enables A1–A4 → Y1–Y4 path when low. |
| 1A1–1A4 | Data inputs (Section 1) | Non-inverting inputs feeding outputs Y1–Y4 respectively; TTL-compatible voltage thresholds. |
| 1Y1–1Y4 | Open-collector outputs (Section 1) | Require external pull-up; sink up to 64 mA each; support wired-AND and bus arbitration. |
| 2OE | Output-enable input (Section 2) | Independent active-low control for Y1–Y4 outputs of second 4-bit section. |
| 2A1–2A4 | Data inputs (Section 2) | Non-inverting inputs feeding outputs 2Y1–2Y4 respectively; electrically isolated from Section 1. |
| 2Y1–2Y4 | Open-collector outputs (Section 2) | Match 1Yx characteristics; allow independent bus segment control or parallel expansion. |
| VCC | Positive supply | Connected to +5 V rail; decoupling capacitor (0.1 µF) recommended near pin 20. |
| GND | Ground reference | Common return for all inputs, outputs, and internal circuitry; tied to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit sections | Enables simultaneous control of two bus segments or memory banks with separate OE signals. |
| Open-collector outputs | Supports wired-AND logic, I²C-style arbitration, and flexible voltage-level translation via external pull-up selection. |
| TTL-compatible input thresholds | Accepts standard 0.8 V / 2.0 V logic levels - eliminates need for input level shifters in mixed-logic systems. |
| 64 mA output sink capability | Drives up to 10 standard TTL loads or terminates 50 Ω transmission lines directly without buffer amplification. |
| Low input capacitance (6 pF) | Minimizes loading on upstream drivers and preserves signal edge integrity in high-speed address/data paths. |
Applications
| Memory Address Buffering | Parallel Bus Driver |
|---|---|
Use Scenario: Driving 16-bit address bus in 8086/8088-based industrial controller with multiple memory chips. IC Role / Device Role / Timing Role: Buffers CPU address lines to reduce capacitive loading and maintain setup/hold timing margins across long traces. Use Value: Prevents address skew and decoding errors by providing low-propagation-delay, high-current drive to multiple RAM/ROM devices. | Use Scenario: Interfacing microcontroller GPIO port to external peripheral bus with shared data/control lines. IC Role / Device Role / Timing Role: Acts as bidirectional bus transceiver (with external direction control) using open-collector outputs and pull-up network. Use Value: Enables reliable multi-master arbitration and hot-plug detection via wired-AND signaling on shared control lines. |
| Legacy System Upgrade | Test Equipment Signal Conditioning |
Use Scenario: Replacing obsolete 74LS244 in aging automated test fixture where higher drive strength is needed. IC Role / Device Role / Timing Role: Drop-in functional replacement with identical pinout and logic behavior but improved sink current and noise immunity. Use Value: Extends service life of legacy hardware without PCB redesign - maintains backward compatibility while improving reliability. | Use Scenario: Level-shifting and fan-out buffering for digital stimulus signals in benchtop logic analyzer front-end. IC Role / Device Role / Timing Role: Converts FPGA I/O voltages to 5 V TTL levels while driving multiple measurement channels simultaneously. Use Value: Ensures consistent edge rates and signal fidelity across 8-channel parallel capture paths with minimal inter-channel skew. |
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 output sink current (24 mA), higher propagation delay (15–25 ns), no ESD rating specified. | Compatible only in low-speed, low-load scenarios; not suitable for driving terminated buses or dense memory arrays. | Select if cost sensitivity outweighs performance needs and existing design uses LS logic family exclusively. |
| SN74ACT244N | CMOS-based, 50 mA sink, 3.3 V/5 V tolerant inputs, faster tPLH/tPHL (2.5–6.5 ns), higher noise immunity. | Better suited for mixed-voltage systems and lower-power designs; requires careful attention to unused input termination. | Prefer for new designs requiring lower ICC, wider VCC range, or interoperability with 3.3 V logic; not pin-compatible due to different pin mapping. |
Compared with SN74LS244N and SN74ACT244N, the SN74BCT760N delivers superior drive strength and military-grade ESD protection while retaining full TTL compatibility - making it optimal for upgrading legacy bus interfaces where reliability and load capacity are critical.
Availability
SN74BCT760N is available at Aetrix Electronics and suitable for industrial control systems, legacy computing upgrades, and test equipment requiring stable component supply with long-term obsolescence management.
Supply support for SN74BCT760N 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN74BCT760N belongs to TI's legacy BCT logic family, designed specifically to enhance density and performance of 3-state memory address drivers, clock distribution networks, and bus-oriented receivers/transmitters in mid-1990s computing and instrumentation systems.
FAQ
What is the maximum output sink current specification for SN74BCT760N?
The SN74BCT760N is rated for 64 mA per output in the low state under recommended operating conditions (VCC = 4.5 V, TA = 0°C to 70°C). This value is confirmed in the "Recommended Operating Conditions" table of the SCBS034B datasheet and reflects worst-case guaranteed drive capability for reliable bus termination and TTL fan-out.
Does SN74BCT760N support 3.3 V logic inputs?
No - the SN74BCT760N has fixed TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V) and is not 3.3 V tolerant. Applying 3.3 V signals directly may result in marginal or incorrect logic recognition. For mixed-voltage interfacing, level-shifting circuitry or a 3.3 V–compatible alternative like SN74ACT244N is required.
Can SN74BCT760N be used as a direct replacement for SN74LS244N?
Yes - the SN74BCT760N shares identical pinout, logic function, and DC electrical interface with SN74LS244N, making it a functional drop-in upgrade. However, SN74BCT760N offers higher output drive (64 mA vs. 24 mA), faster propagation (2.1–10 ns vs. 15–25 ns), and >2000 V ESD protection not present in LS variants.
What is the purpose of the two separate OE inputs on SN74BCT760N?
The SN74BCT760N features two independent output-enable inputs (1OE and 2OE) to allow selective activation of its two 4-bit sections. This enables dynamic partitioning of bus resources - for example, enabling one section to drive address lines while disabling the other to isolate data lines - reducing contention and simplifying timing control in complex memory-mapped systems.
Is SN74BCT760N RoHS compliant?
Yes - the SN74BCT760N is RoHS compliant, as confirmed in TI's Package Option Addendum (15-Jul-2026), which lists "Yes" under the RoHS column for orderable part number SN74BCT760N. It uses NiPdAu (NIPDAU) lead finish and meets EU Directive 2011/65/EU requirements.
SN74BCT760N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74BCT
- 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:
- -, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-PDIP
SN74BCT760N FAQ
1.How can I place an order for SN74BCT760N through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74BCT760N 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 SN74BCT760N reliable?
The price and inventory of SN74BCT760N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74BCT760N is usually 5 days.
3.What payment methods are accepted for SN74BCT760N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74BCT760N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74BCT760N?
SN74BCT760N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74BCT760N 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 SN74BCT760N?
For technical support, including SN74BCT760N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74BCT760N requirements.
6.How does Aetrix verify that SN74BCT760N is sourced from the original manufacturer or authorized distributors?
All SN74BCT760N 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 SN74BCT760N meets industry standards.
7.What is the process for return or replacement of SN74BCT760N?
All SN74BCT760N units undergo pre-shipment inspection (PSI). If there is an issue with SN74BCT760N, 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 SN74BCT760N part is unused and in its original packaging.
Return procedure for SN74BCT760N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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