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Texas Instruments SN74ABT2241DBR
- Part No.:
- SN74ABT2241DBR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74ABT2241DBR.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,800
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Product details
Overview
SN74ABT2241DBR from Texas Instruments is an octal noninverting buffer/line driver with 3-state outputs, designed for memory address and bus interface applications. It features 25-Ω integrated series output resistors, ±12 mA sink/source capability, 5 V supply operation, and operates from –40°C to 85°C in a 20-pin SSOP package.
For engineers reviewing the SN74ABT2241DBR datasheet, SN74ABT2241DBR pinout, SN74ABT2241DBR application, or SN74ABT2241DBR equivalent, this page delivers verified electrical specs, true pin functions, real-world timing behavior (tPLH/tPHL ≤ 4.7 ns), thermal resistance (θJA = 115°C/W), and validated alternatives for bus buffering and clock distribution designs.
Technical Context
This device implements two independent 4-bit noninverting buffer groups (1A→1Y and 2A→2Y), each controlled by active-low 3-state enable inputs (1OE, 2OE). Its EPIC-IIB BiCMOS architecture enables TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2 V) while delivering low ground bounce (VOLP < 1 V) and high-speed switching.
The integrated 25-Ω series output resistors suppress overshoot/undershoot without external components. Output-enable logic ensures high-impedance state during power-up/down when OE is pulled to VCC or GND via external resistors-minimum values determined by driver current-sinking/sourcing capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Voltage | 4.5 V to 5.5 V - supports standard 5 V TTL systems with ±10% tolerance. |
| IOL / IOH Drive Strength | 12 mA sink / –24 mA source - drives heavy capacitive loads and multiple TTL inputs reliably. |
| tPLH / tPHL Propagation Delay | 1 ns (min) to 4.7 ns (max) at CL = 50 pF - enables high-speed bus timing in 25+ MHz systems. |
| θJA Thermal Resistance | 115°C/W (DB package) - defines maximum power dissipation before thermal derating in PCB layouts. |
| Integrated Series Resistor | 25 Ω per output - eliminates need for external termination resistors on transmission lines. |
| VIH / VIL Input Thresholds | 2.0 V / 0.8 V - ensures robust noise margin and compatibility with standard TTL logic families. |
| IOZH / IOZL Off-State Leakage | ±50 µA - guarantees minimal current draw and signal integrity in high-impedance bus states. |
Pinout & Package
SN74ABT2241DBR uses a 20-pin Shrink Small-Outline Package (SSOP, DB), 7.4 mm × 5.3 mm footprint, 2.0 mm max height, with 0.65 mm lead pitch and moisture sensitivity level 1 (260°C reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 19 | Group 1 Output Enable (active-low) | Controls all four 1Y outputs; must be pulled high for high-Z during power sequencing. |
| 2OE, 2 | Group 2 Output Enable (active-low) | Independent control of 2Y1–2Y4; allows staggered bus arbitration or partial enable. |
| 1A1–1A4, 2–4,6,8 | Group 1 Data Inputs | Noninverting inputs driving Y1–Y4 outputs; TTL-compatible voltage thresholds. |
| 2A1–2A4, 11,13,15,17 | Group 2 Data Inputs | Noninverting inputs driving 2Y1–2Y4; electrically isolated from Group 1. |
| 1Y1–1Y4, 18,16,14,12 | Group 1 Buffered Outputs | 3-state outputs with built-in 25-Ω series resistance; drive buses directly. |
| 2Y1–2Y4, 9,7,5,3 | Group 2 Buffered Outputs | 3-state outputs with identical drive and termination; supports dual-bus isolation. |
| GND, 10 | Ground Reference | Primary return path for all I/O and internal circuitry; requires low-inductance PCB connection. |
| VCC, 20 | Power Supply | 5 V supply rail; decoupling capacitor (0.1 µF) required near pin for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω series output resistors | Eliminates external termination components and reduces PCB layout complexity for point-to-point or stubbed bus traces. |
| EPIC-IIB BiCMOS process | Reduces dynamic power consumption versus standard bipolar TTL while maintaining full 5 V drive strength. |
| Low ground bounce (VOLP < 1 V) | Prevents false logic transitions in adjacent circuits during simultaneous output switching events. |
| Symmetrical active-low OE inputs | Enables clean, synchronized bus release across both 4-bit groups using shared control logic. |
| High fan-out capability (≥ 20 TTL loads) | Drives large memory address or data buses without intermediate buffers or level-shifting stages. |
Applications
| Memory Address Buffering | System Bus Transceiver Interface |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or Flash devices on a shared bus. IC Role / Device Role / Timing Role: Noninverting octal buffer providing level translation, drive strength, and 3-state isolation between master and memory peripherals. Use Value: Integrated 25-Ω resistors suppress ringing on long address traces, enabling reliable operation up to 25 MHz without added components. |
Use Scenario: Isolating bidirectional data bus segments between CPU and peripheral controllers in industrial PLC backplanes. IC Role / Device Role / Timing Role: Dual-group 3-state line driver enabling directional control and bus contention avoidance via separate OE signals. Use Value: Independent 1OE/2OE pins allow precise timing of bus release and acquisition, reducing arbitration latency by up to 3 ns versus single-enable alternatives. |
| Clock Distribution Network | Legacy Peripheral Interface |
|
Use Scenario: Fan-out of a 5 V system clock to multiple synchronous peripherals (ADCs, DACs, FPGAs) requiring matched skew. IC Role / Device Role / Timing Role: Low-skew noninverting buffer with matched tPLH/tPHL (≤ 0.5 ns variation) across all eight outputs. Use Value: Propagation delay consistency (tPLH/tPHL = 1–4.7 ns) ensures sub-nanosecond inter-output skew critical for setup/hold timing closure. |
Use Scenario: Interfacing modern microcontrollers with legacy parallel peripherals (LCD modules, dot-matrix printers, ISA-style expansion cards). IC Role / Device Role / Timing Role: Level-shifting and drive-strengthening buffer compatible with 5 V TTL input requirements and high-capacitance cable loads. Use Value: 12 mA sink capability sustains valid logic levels over 2 m of 50 pF/m ribbon cable, eliminating need for repeaters in embedded control panels. |
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 |
|---|---|---|---|
| SN74ABT2240DBR | Inverting outputs (A→Y̅) vs. noninverting (A→Y); identical pinout, timing, and drive strength. | Required where bus polarity inversion is needed for signal alignment or logic minimization. | Select SN74ABT2240DBR only when system-level logic equations require inverted outputs; otherwise SN74ABT2241DBR maintains direct signal mapping. |
| SN74LVC244APWR | 3.3 V only (1.65–3.6 V), lower drive (24 mA sink), no integrated series resistors, TSSOP-20 package. | Suitable for mixed-voltage 3.3 V systems but requires external termination and level-shifting for 5 V interfaces. | Choose SN74LVC244APWR for new 3.3 V designs with space-constrained layouts; retain SN74ABT2241DBR for existing 5 V infrastructure or noise-sensitive bus runs. |
Compared with SN74ABT2240DBR, SN74ABT2241DBR preserves signal polarity for direct address/data routing; compared with SN74LVC244APWR, it delivers native 5 V compatibility, built-in termination, and superior noise immunity in legacy industrial environments.
Availability
SN74ABT2241DBR is available at Aetrix Electronics and suitable for memory subsystems, industrial backplane interfaces, clock distribution networks, and legacy peripheral bridging requiring stable component supply and long-term manufacturability.
Supply support for SN74ABT2241DBR 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 over 50 years of innovation in industrial, automotive, and communications markets.
The ABT logic family-including SN74ABT2241DBR-is engineered for high-speed, low-noise 5 V bus interfacing in mission-critical industrial and computing applications where reliability and signal integrity are paramount.
FAQ
What is the operating temperature range for SN74ABT2241DBR?
The SN74ABT2241DBR is characterized for operation from –40°C to +85°C, making it suitable for commercial and industrial environments. This range is confirmed in the recommended operating conditions table of the SCBS233B datasheet and aligns with its DB package qualification for extended thermal cycling.
Does SN74ABT2241DBR require external pull-up or pull-down resistors on OE pins?
Yes - to ensure high-impedance state during power-up or power-down, OE pins (1OE and 2OE) must be tied to VCC via a pull-up resistor and to GND via a pull-down resistor. Minimum resistor values depend on the driver's current-sinking and current-sourcing capability, as specified in the functional description section of the datasheet.
Can SN74ABT2241DBR drive a 50 pF load with guaranteed timing?
Yes - all switching characteristics (tPLH, tPHL, tPZH, etc.) in the datasheet are explicitly tested at CL = 50 pF. The SN74ABT2241DBR achieves tPLH/tPHL ≤ 4.7 ns under these conditions at VCC = 5 V and TA = 25°C, ensuring predictable timing in standard PCB trace and connector loading scenarios.
Is SN74ABT2241DBR pin-compatible with other packages in the same family?
No - while SN74ABT2241DW (SOIC-20) and SN74ABT2241PWR (TSSOP-20) share identical pinout and functionality, the SN74ABT2241DBR (SSOP-20) has different mechanical dimensions and land pattern requirements. Board layout must match DB package drawings (TI DB0020A), not DW or PW footprints.
What is the maximum output current rating for SN74ABT2241DBR?
The SN74ABT2241DBR supports 12 mA sink current (IOL) and –24 mA source current (IOH) per output, as specified under recommended operating conditions. Absolute maximum ratings allow up to 30 mA continuous output current, but sustained operation above 12 mA sink or –24 mA source may exceed thermal limits in the DB package.
SN74ABT2241DBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 32mA, 12mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
SN74ABT2241DBR FAQ
1.How can I place an order for SN74ABT2241DBR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT2241DBR 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 SN74ABT2241DBR reliable?
The price and inventory of SN74ABT2241DBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT2241DBR is usually 5 days.
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SN74ABT2241DBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT2241DBR 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 SN74ABT2241DBR?
For technical support, including SN74ABT2241DBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT2241DBR requirements.
6.How does Aetrix verify that SN74ABT2241DBR is sourced from the original manufacturer or authorized distributors?
All SN74ABT2241DBR 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 SN74ABT2241DBR meets industry standards.
7.What is the process for return or replacement of SN74ABT2241DBR?
All SN74ABT2241DBR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT2241DBR, 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 SN74ABT2241DBR part is unused and in its original packaging.
Return procedure for SN74ABT2241DBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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