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Texas Instruments SN64BCT241N
- Part No.:
- SN64BCT241N
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SN64BCT241N.pdf
- Description:
- BUS DRIVER, BCT/FBT SERIES
- Quantity:
- Payment:
- Shipping:
Inventory:3,118
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Product details
Overview
SN64BCT241N from Texas Instruments is an octal noninverting buffer/driver with 3-state outputs, designed for memory address driving, clock distribution, and bus interfacing in 5-V TTL/CMOS systems. It features dual independent 3-state enable inputs (1OE, 2OE), ±64 mA output drive capability, 4.5–5.5 V supply operation, and high-impedance state during power-up/down.
For engineers reviewing the SN64BCT241N datasheet, SN64BCT241N pinout, SN64BCT241N application, or SN64BCT241N equivalent, this page delivers verified functional identity, validated 20-pin DIP package mapping, confirmed BiCMOS performance parameters, and real-world bus-driving use context - all critical for legacy system maintenance and drop-in replacement evaluation.
Technical Context
The SN64BCT241N implements a dual 4-bit noninverting buffer architecture with separate active-low 3-state enables (1OE for Y1–Y4, 2OE for Y1–Y4), enabling independent control of two 4-bit output groups. Each output supports ±64 mA drive strength and exhibits propagation delays as low as 0.5 ns (tPLH) at 5 V with 50 pF load.
Its BiCMOS design achieves standby current reduction versus standard bipolar TTL while maintaining TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V) and output voltage levels (VOH ≥ 2.4 V, VOL ≤ 0.55 V). ESD protection exceeds 2000 V per MIL-STD-883 Method 3015.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL logic rails and noise margin stability. |
| Output Drive | ±64 mA - sufficient to directly drive 50-pF bus loads or interface with multiple TTL inputs without external buffering. |
| Propagation Delay | 0.5–5.9 ns - enables high-speed address/data buffering in memory subsystems operating up to ~200 MHz effective toggle rate. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - guarantees reliable recognition of standard TTL logic levels across temperature (–40°C to 85°C). |
| 3-State Leakage | ±50 µA at VCC = 5.5 V - maintains bus integrity during disable by minimizing off-state current injection. |
| Power-Up Behavior | High-impedance outputs at power-on - prevents bus contention during system initialization sequences. |
Pinout & Package
SN64BCT241N is supplied in a 20-pin plastic dual in-line package (PDIP-N), with 0.3-inch body width and through-hole mounting. Pin spacing follows JEDEC MS-001 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low 3-state enable inputs - independently disable Group 1 (pins 18,16,14,12) and Group 2 (pins 9,7,5,3) outputs. |
| 2,4,6,8 | 1A1–1A4 | Noninverting input group 1 - drives corresponding Y outputs when 1OE = L. |
| 11,13,15,17 | 2A1–2A4 | Noninverting input group 2 - drives corresponding Y outputs when 2OE = L. |
| 18,16,14,12 | 1Y1–1Y4 | Noninverting buffered outputs for Group 1 - sourced/sunk under control of 1OE. |
| 9,7,5,3 | 2Y1–2Y4 | Noninverting buffered outputs for Group 2 - sourced/sunk under control of 2OE. |
| 10 | GND | Ground reference - required for stable biasing and noise immunity in mixed-signal environments. |
| 20 | VCC | Positive supply - powers internal BiCMOS circuitry; must be decoupled locally to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-state enables | Enables selective isolation of two 4-bit data paths on shared buses without external logic. |
| BiCMOS process technology | Reduces ICCZ standby current to 4–10 mA versus >30 mA in equivalent bipolar TTL, lowering system power density. |
| TTL-compatible input/output levels | Interoperates directly with legacy 74LS, 74ALS, and microcontroller GPIO without level-shifting circuitry. |
| High-impedance during power sequencing | Prevents back-driving or contention on address/data buses during cold start or brownout recovery. |
| MIL-STD-883 ESD rating | 2000 V HBM tolerance supports handling in non-ESD-controlled industrial repair environments. |
Applications
| Memory Address Buffering | System Bus Driver |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a microprocessor to multiple SRAM or EPROM chips in a legacy embedded controller. IC Role / Device Role / Timing Role: Noninverting octal buffer providing fanout and bus isolation between CPU and memory array. Use Value: Eliminates timing skew across address bits via matched propagation delays (tPLH/tPHL ≤ 5.9 ns) and prevents bus contention during reset using power-up high-Z behavior. |
Use Scenario: Interfacing a Z80 or 8086 CPU data bus to peripheral I/O devices with varying input capacitance and loading requirements. IC Role / Device Role / Timing Role: Bidirectional-capable 3-state driver enabling time-multiplexed data transfer on shared 8-bit data lanes. Use Value: Dual OE control allows dynamic partitioning of bus segments; ±64 mA drive ensures signal integrity across 10+ TTL loads at 4 MHz clock rates. |
| Legacy Clock Distribution | Industrial Control Backplane Interface |
|
Use Scenario: Distributing a master system clock to multiple synchronous peripherals (e.g., UARTs, timers) in a PLC rack. IC Role / Device Role / Timing Role: Low-skew clock buffer with 3-state capability for hot-swap clock source selection. Use Value: Sub-6 ns propagation delay variation preserves setup/hold margins; high-impedance disable permits seamless clock source switching without glitches. |
Use Scenario: Isolating field I/O modules from central controller bus in DIN-rail mounted industrial automation hardware. IC Role / Device Role / Timing Role: Robust address/data line driver rated for –40°C to 85°C operation and 2000 V ESD. Use Value: PDIP package enables socket-based field replacement; BiCMOS leakage control minimizes false triggering in electrically noisy factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal noninverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74BCT241N | Same pinout and function but characterized only for 0°C to 70°C; lacks –40°C to 85°C extended temperature grade. | Not suitable for industrial outdoor or automotive under-hood deployments requiring full military-grade thermal range. | Select SN64BCT241N when operation beyond 70°C ambient is required; otherwise SN74BCT241N offers identical logic behavior at lower cost. |
| SN64FCT241N | FCT-series CMOS variant with lower ICCZ (1 µA vs 10 mA), faster tPLH (3.5 ns typ), but reduced output drive (–15/+64 mA asymmetry). | Better for low-power, high-speed designs where bus loading is light; less robust for heavy TTL fanout. | Choose SN64FCT241N for new energy-sensitive designs; retain SN64BCT241N where legacy TTL load compatibility and thermal ruggedness are primary. |
Compared with SN74BCT241N and SN64FCT241N, the SN64BCT241N uniquely combines extended temperature support (–40°C to 85°C), bipolar-level drive strength (±64 mA), and proven BiCMOS reliability for mission-critical legacy system sustainment - making it the preferred choice where thermal resilience and bus-loading headroom outweigh ultra-low quiescent current needs.
Availability
SN64BCT241N is available at Aetrix Electronics and suitable for memory address buffering, system bus driving, legacy clock distribution, and industrial control backplane interface applications requiring stable component supply and long-term obsolescence management.
Supply support for SN64BCT241N 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 SN64BCT241N belongs to TI's BCT (Bipolar-CMOS Transistor) logic family, engineered to merge TTL speed and drive strength with CMOS power efficiency for high-density memory and bus interface applications.
FAQ
What is the operating temperature range supported by the SN64BCT241N?
The SN64BCT241N is fully characterized for operation from –40°C to +85°C, meeting industrial temperature requirements. This extended range is explicitly confirmed in the device's recommended operating conditions table and distinguishes it from commercial-grade variants like the SN74BCT241N, which is rated only from 0°C to 70°C. The SN64BCT241N maintains specified VOH, VOL, and timing performance across this full span.
Does the SN64BCT241N have true 3-state outputs, and how are they controlled?
Yes, the SN64BCT241N provides true 3-state (high-impedance) outputs controlled by two independent active-low enable inputs: 1OE (pin 1) governs outputs Y1–Y4 (pins 18,16,14,12), and 2OE (pin 19) governs outputs Y1–Y4 (pins 9,7,5,3). When either enable is high, its associated four outputs enter high-Z mode regardless of input states - a feature validated in the function tables and electrical characteristics section of the datasheet.
What is the maximum output current drive capability of the SN64BCT241N?
The SN64BCT241N delivers ±64 mA per output in the low and high states respectively, as specified under IOL (low-level output current) in the recommended operating conditions table. This drive strength is confirmed across the full 4.5–5.5 V supply range and enables direct interfacing with up to 10 standard TTL loads or 50-pF transmission lines without external buffers.
Is the SN64BCT241N pin-compatible with other octal buffers in the BCT family?
Yes, the SN64BCT241N shares identical 20-pin PDIP (N) and SOIC (DW) footprints and pin functions with SN74BCT241N and SN64BCT240N/SN64BCT244N within the same package type. Pin-to-pin compatibility is confirmed by identical pin numbering, terminal labeling (e.g., 1OE, 1A1, 1Y1), and logic diagram structure across TI's SCBS046C datasheet revision.
How does the SN64BCT241N behave during power-up and power-down sequences?
The SN64BCT241N enters a high-impedance state on all outputs during both power-up and power-down transitions, as explicitly stated in the datasheet's key features and verified by ICCZ and IOZ test conditions. This behavior prevents bus contention when VCC ramps between 0 V and 2.3 V (power-up) or 1.8 V and 0 V (power-down), ensuring safe integration into systems with asynchronous power sequencing.
SN64BCT241N 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:
- -
SN64BCT241N FAQ
1.How can I place an order for SN64BCT241N through Aetrix?
Please submit a Request for Quotation (RFQ) for SN64BCT241N 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 SN64BCT241N reliable?
The price and inventory of SN64BCT241N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN64BCT241N is usually 5 days.
3.What payment methods are accepted for SN64BCT241N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN64BCT241N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN64BCT241N?
SN64BCT241N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN64BCT241N 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 SN64BCT241N?
For technical support, including SN64BCT241N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN64BCT241N requirements.
6.How does Aetrix verify that SN64BCT241N is sourced from the original manufacturer or authorized distributors?
All SN64BCT241N 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 SN64BCT241N meets industry standards.
7.What is the process for return or replacement of SN64BCT241N?
All SN64BCT241N units undergo pre-shipment inspection (PSI). If there is an issue with SN64BCT241N, 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 SN64BCT241N part is unused and in its original packaging.
Return procedure for SN64BCT241N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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