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Texas Instruments SN74BCT241N
- Part No.:
- SN74BCT241N
- Manufacturer:
- Texas Instruments
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74BCT241N.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,696
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Product details
Overview
SN74BCT241N from Texas Instruments is a noninverting octal buffer/driver with 3-state outputs, designed for memory address driving and bus interfacing in TTL-compatible systems. It operates at 4.5–5.5 V, delivers 64 mA low-level output current, supports 0°C to 70°C ambient operation, and features BiCMOS logic for reduced ICCZ quiescent current. Used in legacy industrial control backplanes and parallel data buses.
For engineers reviewing the SN74BCT241N datasheet, SN74BCT241N pinout, SN74BCT241N application, or SN74BCT241N equivalent, this page provides verified functional specifications, validated DIP-20 package details, confirmed switching timing (tPLH ≤ 4.9 ns), and two documented alternative parts for memory interface and bus driver replacement scenarios.
Technical Context
The SN74BCT241N implements dual 4-bit noninverting buffers with independent active-low 3-state enable inputs (1OE and 2OE), each controlling four outputs. Its BiCMOS architecture combines bipolar input stages for TTL-level compatibility and CMOS output stages for high drive strength and low standby current.
Each output drives up to 64 mA sink current while maintaining VOL ≤ 0.55 V at VCC = 4.5 V, and supports 50 pF capacitive loads with propagation delays under 5 ns. The device exhibits 6 pF input capacitance and 11 pF output capacitance, enabling stable operation on loaded PCB traces without external termination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures reliable operation across standard 5 V ±10% supply rails in industrial and computing systems. |
| IOL (max) | 64 mA - Supports direct connection to multiple TTL inputs or moderate-length PCB traces without buffering. |
| tPLH / tPHL | ≤ 4.9 ns / ≤ 5.9 ns - Enables use in 100+ MHz synchronous bus designs with tight timing margins. |
| ICCZ (max) | 10 mA - Low quiescent current during 3-state disable reduces system power in idle bus segments. |
| VIH / VIL | 2.0 V / 0.8 V - Fully compatible with standard TTL logic thresholds for seamless integration into legacy systems. |
| Operating Temp | 0°C to 70°C - Qualified for commercial-grade embedded applications including instrumentation and peripheral controllers. |
| ESD Rating | >2000 V HBM - Provides robust handling margin during manual assembly and board-level integration. |
Pinout & Package
SN74BCT241N uses a 20-pin plastic dual in-line package (PDIP) with 300-mil width, standard through-hole mounting, and JEDEC MS-001 compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low enables for Group 1 (pins 3,5,7,9) and Group 2 (pins 18,16,14,12) outputs - permits independent bus segment control. |
| 3,5,7,9 | 1A1–1A4 | Noninverting input channels for first buffer group - accepts TTL-level signals directly from microcontroller address/data lines. |
| 18,16,14,12 | 2A1–2A4 | Noninverting input channels for second buffer group - allows dual-bus or mirrored signal distribution. |
| 2,4,6,8 | 1Y1–1Y4 | 3-state noninverting outputs for Group 1 - high-impedance state isolates driven bus when 1OE = high. |
| 17,15,13,11 | 2Y1–2Y4 | 3-state noninverting outputs for Group 2 - enables time-multiplexed or priority-based bus arbitration. |
| 10 | GND | Power ground reference - requires local decoupling near pin for noise suppression in high-speed switching. |
| 20 | VCC | Positive supply input - must be bypassed with ≥0.1 µF ceramic capacitor to minimize supply rail bounce. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS process technology | Reduces ICCZ to ≤10 mA while maintaining TTL-compatible input thresholds and 64 mA output drive. |
| Dual independent 3-state enables | Allows selective activation of two 4-bit output groups, supporting segmented bus architectures without external logic. |
| Low propagation delay | tPHL ≤ 5.9 ns ensures setup/hold timing compliance in 20–25 MHz parallel bus clock domains. |
| High noise immunity | Input hysteresis and 2.0 V VIH threshold reject transient noise on shared address/data lines in electrically noisy environments. |
| Robust ESD protection | Exceeds 2000 V per MIL-STD-883C Method 3015, reducing field failure risk during handling and rework. |
Applications
| Memory Address Buffering | Parallel Bus Isolation |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM chips on a shared bus. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state control acts as address latch driver, enabling/disabling memory access per chip select. Use Value: 64 mA output drive sustains signal integrity across 6-inch PCB traces; dual OE pins allow interleaved memory bank selection. |
Use Scenario: Isolating CPU data bus from peripheral I/O devices during DMA transfers. IC Role / Device Role / Timing Role: Bidirectional bus driver with independent enable control manages data flow direction and timing alignment. Use Value: Sub-6 ns propagation delay meets 25 MHz bus timing; high-impedance state prevents contention during bus arbitration. |
| Legacy System Backplane Interface | TTL-Level Signal Translation |
|
Use Scenario: Interfacing modern FPGA I/O banks to legacy ISA-style backplane with 5 V TTL signaling. IC Role / Device Role / Timing Role: Level-shifting buffer ensures voltage and timing compatibility between 3.3 V FPGA outputs and 5 V bus receivers. Use Value: VIH = 2.0 V and VIL = 0.8 V guarantee reliable recognition of FPGA logic levels; BiCMOS design minimizes power in always-on backplane slots. |
Use Scenario: Converting LVTTL outputs from a CPLD to full-strength TTL for driving LED arrays and relay drivers. IC Role / Device Role / Timing Role: Current-boosting noninverting driver translates logic states while sourcing/sinking higher load current. Use Value: 64 mA sink capability directly drives 10-mA LEDs without external transistors; low ICCZ reduces heat in dense I/O modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer/driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LS241N | Bipolar TTL process; higher ICCZ (45 mA), lower IOL (24 mA), slower tPLH (15 ns). | Limited to lower-speed, low-density bus applications due to increased power and reduced drive. | Select when legacy LS-TTL compatibility is mandatory and speed/power trade-offs are acceptable. |
| SN74ACT241N | Advanced CMOS; 5 V tolerant inputs, 24 mA IOL, 3.3 V compatible, faster tPLH (3.5 ns), but no BiCMOS ICCZ advantage. | Better suited for mixed-voltage systems but lacks the high-current drive needed for heavy bus loading. | Prefer for new designs requiring lower power and higher speed where 64 mA drive is not required. |
Compared with SN74LS241N, the SN74BCT241N delivers 2.7× higher output current and 3× lower quiescent current, enabling denser bus loading and cooler operation; versus SN74ACT241N, it trades some speed for significantly stronger drive and proven reliability in legacy 5 V TTL infrastructure.
Availability
SN74BCT241N is available at Aetrix Electronics and suitable for memory address buffering, parallel bus isolation, and legacy system backplane interfacing requiring stable component supply and long-term obsolescence management.
Supply support for SN74BCT241N 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 SN74BCT241N belongs to TI's BCT logic family, engineered specifically to enhance performance and density of 3-state memory address drivers and bus-oriented transceivers in 5 V TTL systems.
FAQ
What is the maximum output sink current specification for SN74BCT241N?
The SN74BCT241N supports a maximum low-level output current (IOL) of 64 mA per output pin at VCC = 4.5 V and TA = 25°C, as specified in the electrical characteristics table. This rating ensures reliable driving of multiple TTL inputs or moderate capacitive loads without external amplification. The SN74BCT241N maintains VOL ≤ 0.55 V under this condition, preserving noise margins in real-world bus implementations.
Does SN74BCT241N support 3.3 V logic inputs?
No, the SN74BCT241N is a 5 V-only device with TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) and absolute maximum input voltage of 7 V. It does not guarantee correct operation with 3.3 V logic levels, as VIH may not be consistently met. For mixed-voltage interfaces, level-shifting circuitry or a 3.3 V–tolerant alternative like SN74ACT241N is required. The SN74BCT241N is intended for pure 5 V TTL systems.
What package type is used by SN74BCT241N?
The SN74BCT241N uses a 20-pin plastic dual in-line package (PDIP) with 300-mil body width, designated as "N" in TI's packaging nomenclature. This through-hole package conforms to JEDEC MS-001 standards, features tin-lead or Pb-free (RoHS) lead finish, and is rated for commercial temperature range (0°C to 70°C). The SN74BCT241N pinout matches standard DIP-20 footprints used in legacy industrial PCBs.
How does the BiCMOS design of SN74BCT241N improve system performance?
The BiCMOS architecture of SN74BCT241N integrates bipolar input stages for TTL-level compatibility and CMOS output stages for high current drive and low static power. This results in ICCZ ≤ 10 mA - significantly lower than equivalent bipolar TTL devices - reducing heat generation and supply rail noise in densely populated boards. The SN74BCT241N achieves this without sacrificing 64 mA output drive or sub-6 ns propagation delay, making it ideal for power-sensitive bus applications.
Can SN74BCT241N be used as a direct replacement for SN74LS241N?
The SN74BCT241N shares identical pinout, function, and 5 V operation with SN74LS241N, but offers superior electrical performance: 2.7× higher output current (64 mA vs. 24 mA), 4.5× lower quiescent current (10 mA vs. 45 mA), and faster propagation (≤5.9 ns vs. ~15 ns). While not drop-in in terms of thermal or timing margins, the SN74BCT241N is a functional upgrade that improves bus drive capability and system efficiency without PCB changes.
SN74BCT241N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74BCT
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 15mA, 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
SN74BCT241N FAQ
1.How can I place an order for SN74BCT241N through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74BCT241N 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 SN74BCT241N reliable?
The price and inventory of SN74BCT241N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74BCT241N is usually 5 days.
3.What payment methods are accepted for SN74BCT241N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74BCT241N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74BCT241N?
SN74BCT241N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74BCT241N 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 SN74BCT241N?
For technical support, including SN74BCT241N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74BCT241N requirements.
6.How does Aetrix verify that SN74BCT241N is sourced from the original manufacturer or authorized distributors?
All SN74BCT241N 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 SN74BCT241N meets industry standards.
7.What is the process for return or replacement of SN74BCT241N?
All SN74BCT241N units undergo pre-shipment inspection (PSI). If there is an issue with SN74BCT241N, 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 SN74BCT241N part is unused and in its original packaging.
Return procedure for SN74BCT241N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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