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Texas Instruments SN74ABT2244ANSR
- Part No.:
- SN74ABT2244ANSR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74ABT2244ANSR.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
SN74ABT2244ANSR from Texas Instruments is an octal noninverting buffer/line driver with 3-state outputs, designed for memory address and bus-oriented applications. It operates from 4.5 V to 5.5 V, supports –40°C to 85°C, sinks up to 12 mA per output, features integrated 25-Ω series resistors to suppress overshoot, and maintains high-impedance during power-up/down below 2.1 V.
For engineers reviewing the SN74ABT2244ANSR datasheet, SN74ABT2244ANSR pinout, SN74ABT2244ANSR application, or SN74ABT2244ANSR equivalent, key selection criteria include its 20-pin SOP (NS) package, dual independent 4-bit 3-state output groups, low-output-ground-bounce (<1 V), and compatibility with TTL-level control signals in high-density bus interface designs.
Technical Context
This device implements two independent 4-bit noninverting buffer sections, each with a dedicated active-low output-enable (OE) input. Its EPIC-IIB BiCMOS architecture delivers reduced power dissipation versus standard bipolar TTL while maintaining TTL-compatible input thresholds and drive strength.
Each output includes an internal 25-Ω series resistor to dampen transmission-line reflections without external components. The high-impedance state is guaranteed during VCC ramping between 0–2.1 V; above 2.1 V, OE must be pulled high via external resistor to ensure disable integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V TTL and CMOS systems |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and computing applications |
| Output Drive | Sinks 12 mA per Y output - sufficient to drive 50-Ω transmission lines or multiple TTL inputs |
| Propagation Delay | tPLH/tPHL ≤ 4.7 ns at VCC = 5 V, TA = 25°C - enables high-speed bus buffering up to ~200 MHz data rates |
| Input Thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V - fully compatible with standard TTL logic families |
| Output Series Resistance | 25 Ω integrated - eliminates need for external termination resistors on PCB traces |
| Power-Up Behavior | High-Z state when VCC < 2.1 V - prevents bus contention during system power sequencing |
Pinout & Package
The SN74ABT2244ANSR is supplied in a 20-pin SOP (NS) package, 7.5 mm × 13.0 mm body size, 1.27 mm lead pitch, and 2.65 mm maximum height per JEDEC MS-012. Pin 1 is located at the top-left corner with a molded index notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Controls group-wide 3-state output behavior; low enables corresponding Y outputs |
| 1A1–1A4, 2A1–2A4 | Noninverting data inputs | Two independent 4-bit input buses; each maps directly to respective Y outputs |
| 1Y1–1Y4, 2Y1–2Y4 | Noninverting 3-state outputs | Buffered outputs with integrated 25-Ω series resistance; high-Z when OE = high |
| VCC, GND | Power supply terminals | Single 5-V supply; decoupling required near pins 10 (GND) and 11 (VCC) |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω output series resistors | Eliminates external termination components and reduces PCB layout complexity for controlled-impedance trace routing |
| Low output ground bounce (VOLP < 1 V) | Minimizes noise coupling into shared ground planes during simultaneous switching of multiple outputs |
| Guaranteed high-impedance during power sequencing | Prevents bus contention and back-driving during power-up/down transitions across mixed-voltage systems |
| EPIC-IIB BiCMOS process | Combines TTL-compatible drive strength with CMOS-level static power efficiency and improved noise immunity |
| TTL-compatible input thresholds | Directly interfaces with legacy 74-series, microcontroller GPIO, and FPGA I/O banks without level-shifting |
Applications
| Memory Address Buffering | Backplane Bus Interface |
|---|---|
Use Scenario: Driving address lines from a microprocessor to multiple SRAM or ROM chips on a shared memory bus. IC Role / Device Role / Timing Role: Noninverting octal buffer providing fan-out amplification and signal integrity enhancement for parallel address paths. Use Value: Integrated 25-Ω resistors suppress ringing on long PCB traces, enabling reliable operation at >20 MHz clock rates without added termination. | Use Scenario: Isolating and driving bidirectional data/control signals across a 20-pin backplane connector in modular instrumentation systems. IC Role / Device Role / Timing Role: Dual-group 3-state line driver enabling direction-controlled data flow between plug-in modules and host controller. Use Value: Independent OE controls allow precise timing of bus release and acquisition, minimizing turnaround delay in half-duplex protocols. |
| Clock Distribution Fan-Out | Legacy Peripheral Interface |
Use Scenario: Distributing a single system clock to multiple synchronous peripherals (e.g., ADCs, DACs, UARTs) requiring matched skew and clean edges. IC Role / Device Role / Timing Role: Low-skew, noninverting buffer replicating clock signal with minimal jitter addition and controlled edge rates. Use Value: Propagation delay variation <0.5 ns between channels ensures sub-nanosecond inter-channel skew for tight timing margins. | Use Scenario: Interfacing modern microcontrollers with legacy parallel peripherals such as dot-matrix LCD controllers or ISA-style expansion cards. IC Role / Device Role / Timing Role: Level-translation-capable buffer translating 3.3-V MCU outputs to robust 5-V TTL-compatible drive levels. Use Value: 12-mA sink capability drives heavy capacitive loads (e.g., 100+ pF bus capacitance) while maintaining VIH/VIL margins under load. |
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 |
|---|---|---|---|
| SN74ABT244NSR | Same ABT family, identical pinout and electrical specs; differs only in marking and minor packaging detail (NS vs NSR suffix denotes tape-and-reel variant) | No functional difference; both rated for –40°C to 85°C, same SOIC-20 footprint and thermal performance | Select SN74ABT2244ANSR when ordering TI's standard production part number with confirmed NS package and reel quantity (2000 pcs) |
| 74ACT244SCX | ACT-family CMOS device; higher ICC (max 8 mA vs ABT's 30 mA), lower IOL (24 mA vs 12 mA), no integrated series resistors | Requires external 33–51 Ω series resistors for clean edge control; better suited for low-noise, low-power systems where ABT's drive strength is excessive | Choose 74ACT244SCX only if board layout allows adding discrete termination and system current budget excludes ABT's higher dynamic consumption |
Compared with SN74ABT2244ANSR, SN74ABT244NSR is functionally identical and interchangeable, whereas 74ACT244SCX requires redesign for termination and offers lower drive-making SN74ABT2244ANSR optimal for high-fanout, noise-sensitive 5-V bus applications needing plug-and-play signal integrity.
Availability
SN74ABT2244ANSR is available at Aetrix Electronics and suitable for memory subsystems, industrial backplanes, clock distribution networks, and legacy peripheral interfaces requiring stable component supply and long-term industrial temperature support.
Supply support for SN74ABT2244ANSR 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 high-reliability interface ICs.
The ABT logic family-including SN74ABT2244ANSR-is engineered for high-speed, low-noise bus interfacing in industrial, computing, and communications equipment where signal integrity and power efficiency are critical.
FAQ
What is the operating voltage range for the SN74ABT2244ANSR?
The SN74ABT2244ANSR operates from 4.5 V to 5.5 V DC. This range ensures full compatibility with standard 5-V TTL and mixed-signal systems. Operation outside this window may cause undefined behavior or damage; absolute maximum rating is 7 V, but functional operation is only guaranteed within the recommended 4.5–5.5 V band per the SCBS106E datasheet.
Does the SN74ABT2244ANSR require external termination resistors?
No, the SN74ABT2244ANSR does not require external termination resistors. Each output integrates a 25-Ω series resistor to dampen signal reflections on PCB traces. This feature simplifies layout, reduces BOM count, and improves signal integrity for typical 50-Ω or 75-Ω trace environments without adding discrete components.
How does the SN74ABT2244ANSR behave during power-up and power-down?
When VCC is between 0 V and 2.1 V, the SN74ABT2244ANSR automatically enters a high-impedance state on all outputs, preventing bus contention. Above 2.1 V, OE must be actively held high (e.g., via pull-up resistor) to maintain high-Z; otherwise, outputs may float or drive unpredictably during partial power conditions.
What package type is used for the SN74ABT2244ANSR?
The SN74ABT2244ANSR uses a 20-pin SOP (Small Outline Package) with NS designation-also referenced as SOIC-20 narrow-body. Its dimensions are 7.5 mm × 13.0 mm with 1.27 mm lead pitch and 2.65 mm max height, compliant with JEDEC MS-012. Pin 1 is marked by a molded notch at the top-left corner.
Can the SN74ABT2244ANSR drive multiple TTL inputs reliably?
Yes, the SN74ABT2244ANSR can reliably drive multiple TTL inputs: each output sinks up to 12 mA, exceeding the 1.6 mA per input required for standard TTL fan-out (typically 10 loads). Its low output impedance and integrated 25-Ω resistor further ensure clean signal edges even under capacitive loading up to 100 pF, making it ideal for dense bus architectures.
SN74ABT2244ANSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (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-SO
SN74ABT2244ANSR FAQ
1.How can I place an order for SN74ABT2244ANSR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT2244ANSR 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 SN74ABT2244ANSR reliable?
The price and inventory of SN74ABT2244ANSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT2244ANSR is usually 5 days.
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SN74ABT2244ANSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT2244ANSR 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 SN74ABT2244ANSR?
For technical support, including SN74ABT2244ANSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT2244ANSR requirements.
6.How does Aetrix verify that SN74ABT2244ANSR is sourced from the original manufacturer or authorized distributors?
All SN74ABT2244ANSR 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 SN74ABT2244ANSR meets industry standards.
7.What is the process for return or replacement of SN74ABT2244ANSR?
All SN74ABT2244ANSR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT2244ANSR, 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 SN74ABT2244ANSR part is unused and in its original packaging.
Return procedure for SN74ABT2244ANSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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