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Texas Instruments SN74BCT241DWR
- Part No.:
- SN74BCT241DWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74BCT241DWR.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,189
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Product details
Overview
SN74BCT241DWR from Texas Instruments is an octal noninverting buffer/driver with 3-state outputs, designed for memory address and bus driving in 5-V TTL-compatible systems. It features dual independent 4-bit channels, active-low output-enable (1OE/2OE), 128-mA low-level output drive, and operates from 0°C to 70°C. Used in legacy industrial control backplanes and parallel data buses.
For engineers reviewing the SN74BCT241DWR datasheet, SN74BCT241DWR pinout, SN74BCT241DWR application, or SN74BCT241DWR equivalent, key selection criteria include 3-state bus contention control, BiCMOS ICCZ reduction, 5-V supply compatibility, and SOIC-20 package thermal and layout constraints.
Technical Context
The SN74BCT241DWR implements two independent 4-bit noninverting buffer sections, each with separate active-low output-enable inputs (1OE and 2OE). Its BiCMOS architecture delivers TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2 V) and CMOS-level output drive capability (IOL = 128 mA at VOL ≤ 0.55 V).
Each channel supports high-speed switching with tPLH/tPHL ≤ 4.9 ns and 3-state enable/disable delays (tPZH/tPZL ≤ 9.4 ns) under 5-V/50-pF conditions. The device uses symmetrical OE logic and shares a common VCC and GND across all 20 pins, with no internal voltage translation or level-shifting functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures stable operation across standard 5-V ±10% rail tolerances. |
| Output Drive (IOL) | 128 mA - enables direct driving of multiple TTL loads or heavy capacitive bus lines without external buffers. |
| Propagation Delay | ≤4.9 ns (tPLH/tPHL) - supports high-speed address/data latching in 20-MHz+ bus systems. |
| 3-State Enable Delay | ≤9.4 ns (tPZH/tPZL) - minimizes bus contention window during output state transitions. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - guarantees reliable interfacing with standard TTL and LVTTL logic families. |
| ICCZ Quiescent Current | 4–10 mA - significantly lower than bipolar-only equivalents, reducing system standby power. |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded and industrial control applications. |
Pinout & Package
SN74BCT241DWR is housed in a 20-pin SOIC (DW) package, 7.5 mm × 12.8 mm body, 1.27 mm pitch, RoHS-compliant CU NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output-enable controls first and second 4-bit buffer sections independently. |
| 2, 4, 6, 8 11, 13, 15, 17 | 1A1–1A4, 2A1–2A4 | Noninverting input terminals for each of eight buffer channels. |
| 3, 5, 7, 9 12, 14, 16, 18 | 1Y1–1Y4, 2Y1–2Y4 | 3-state noninverting output terminals; high-impedance when respective OE is high. |
| 10 | GND | Power ground reference for all logic and output stages. |
| 20 | VCC | Positive supply rail (4.5–5.5 V); powers both input and output circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS Process | Reduces ICCZ quiescent current by >50% vs. legacy bipolar BCT, lowering system power in idle bus states. |
| TTL-Compatible Inputs | Accepts standard TTL voltage levels without pull-ups or level shifters, simplifying integration into mixed-logic systems. |
| High Sink Current | 128-mA per output supports ≥20 standard TTL unit loads, eliminating need for external bus drivers. |
| Independent 3-State Control | Dual OE inputs allow selective enabling of upper/lower 4-bit groups, enabling flexible bus partitioning. |
| ESD Protection | Exceeds 2000 V per MIL-STD-883C Method 3015, enhancing robustness in handling and board assembly. |
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 3-state buffer isolating CPU address outputs from memory-side loading and contention. Use Value: Prevents address corruption during memory access arbitration using independent OE control per 4-bit group. | Use Scenario: Interfacing a DSP's external memory interface to a peripheral FPGA with mismatched timing margins. IC Role / Device Role / Timing Role: Bidirectional bus driver providing clean signal integrity and controlled 3-state release timing. Use Value: Eliminates bus contention via sub-10-ns tPZL/tPHZ, ensuring glitch-free handoff between master and slave devices. |
| Legacy Industrial Backplane | Test Equipment Signal Routing |
Use Scenario: Expanding I/O capacity on a PLC mainboard using ISA-style parallel expansion slots. IC Role / Device Role / Timing Role: Octal buffer translating controller-side logic levels to backplane bus drivers with load tolerance. Use Value: 128-mA sink capability drives long traces and multiple slot connectors without signal degradation. | Use Scenario: Configurable signal path routing in automated test equipment (ATE) pin electronics modules. IC Role / Device Role / Timing Role: Programmable 3-state gate controlling stimulus/response paths between DUT and measurement circuitry. Use Value: Dual OE inputs enable synchronized path enable/disable across two 4-bit segments for precise test sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LS241N | Bipolar TTL process; higher ICCZ (35 mA typical), lower IOL (24 mA), slower propagation (15–25 ns). | Limited to lower-speed, low-density bus systems; not suitable for high-current or low-power designs. | Choose only if legacy LS compatibility and cost sensitivity outweigh speed/power requirements. |
| SN74ACT241DW | Advanced CMOS; 5-V tolerant inputs, 24-mA IOL, rail-to-rail VOH/VOL, faster tPLH (3.5 ns), but lower drive strength. | Better for mixed-voltage systems and low-noise environments; insufficient for heavy TTL bus loading. | Select when interfacing with 3.3-V logic or noise-sensitive analog-adjacent circuits, not for legacy TTL bus driving. |
Compared with SN74LS241N and SN74ACT241DW, the SN74BCT241DWR uniquely balances high sink current (128 mA), BiCMOS efficiency (ICCZ < 10 mA), and TTL compatibility-making it the optimal choice for upgrading legacy 5-V bus architectures without redesigning drive capability or power delivery.
Availability
SN74BCT241DWR is available at Aetrix Electronics and suitable for memory address buffering, parallel bus isolation, and legacy industrial backplane applications requiring stable component supply and long-term obsolescence management.
Supply support for SN74BCT241DWR 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 SN74BCT241DWR belongs to TI's legacy BCT logic family, engineered specifically to enhance performance and density of 3-state memory address drivers and bus-oriented receivers/transmitters in 5-V systems.
FAQ
What is the maximum output sink current specification for SN74BCT241DWR?
The SN74BCT241DWR supports a maximum low-level output current (IOL) of 128 mA per output under recommended operating conditions (VCC = 4.5 V, VOL ≤ 0.55 V). This rating applies individually to each of the eight Y outputs and is validated across the full commercial temperature range (0°C to 70°C). Exceeding this current may cause VOL to exceed specification or induce thermal stress.
Does SN74BCT241DWR support 3.3-V input logic levels?
No, SN74BCT241DWR does not guarantee reliable operation with 3.3-V inputs. Its input thresholds are TTL-compatible: VIH = 2.0 V minimum and VIL = 0.8 V maximum. While a 3.3-V high signal exceeds VIH, marginal noise margins and potential VIH drift at temperature extremes make dedicated level translation advisable for robust 3.3-V-to-5-V interfacing. The SN74BCT241DWR is optimized for 5-V systems.
What is the pinout configuration of SN74BCT241DWR in the SOIC-20 (DW) package?
The SN74BCT241DWR in SOIC-20 (DW) package has the following verified pinout: Pins 1 and 19 are 1OE and 2OE (active-low enables); pins 2,4,6,8 and 11,13,15,17 are inputs 1A1–1A4 and 2A1–2A4; pins 3,5,7,9 and 12,14,16,18 are outputs 1Y1–1Y4 and 2Y1–2Y4; pin 10 is GND; pin 20 is VCC. This matches the top-view diagram in SCBS005D Rev. April 1994.
Can SN74BCT241DWR be used in place of SN74BCT240?
No, SN74BCT241DWR cannot directly replace SN74BCT240. The SN74BCT240 is an octal inverting buffer with complementary OE/OE inputs, while the SN74BCT241DWR is noninverting with symmetrical active-low OE inputs. Their logic functions, pin assignments (e.g., OE placement), and truth tables differ fundamentally. Substitution would require PCB rewiring and firmware logic inversion.
What is the moisture sensitivity level (MSL) rating for SN74BCT241DWR?
The SN74BCT241DWR has a Moisture Sensitivity Level (MSL) rating of Level-1 at 260°C, per JEDEC J-STD-020. This means the device may be stored indefinitely at ambient conditions (<30°C/60% RH) without baking prior to reflow soldering. The SOIC-20 (DW) package uses CuNiPdAu lead finish and complies with RoHS and green (no Sb/Br) requirements.
SN74BCT241DWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74BCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74BCT241DWR FAQ
1.How can I place an order for SN74BCT241DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74BCT241DWR 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 SN74BCT241DWR reliable?
The price and inventory of SN74BCT241DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74BCT241DWR is usually 5 days.
3.What payment methods are accepted for SN74BCT241DWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74BCT241DWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74BCT241DWR?
SN74BCT241DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74BCT241DWR 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 SN74BCT241DWR?
For technical support, including SN74BCT241DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74BCT241DWR requirements.
6.How does Aetrix verify that SN74BCT241DWR is sourced from the original manufacturer or authorized distributors?
All SN74BCT241DWR 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 SN74BCT241DWR meets industry standards.
7.What is the process for return or replacement of SN74BCT241DWR?
All SN74BCT241DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74BCT241DWR, 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 SN74BCT241DWR part is unused and in its original packaging.
Return procedure for SN74BCT241DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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