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Texas Instruments SN74ABT2244APWR
- Part No.:
- SN74ABT2244APWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ABT2244APWR.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,675
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Product details
Overview
SN74ABT2244APWR 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 ambient temperature, features 25-Ω integrated series output resistors, and delivers 12 mA sink capability per output - enabling clean signal integrity in high-density PCB layouts for industrial control backplanes.
For engineers reviewing the SN74ABT2244APWR datasheet, SN74ABT2244APWR pinout, SN74ABT2244APWR application, or SN74ABT2244APWR equivalent, key selection criteria include its TSSOP-20 (PW) package, 3-state enable timing (tPZL ≤ 8.3 ns), output ground bounce <1 V, and compatibility with 5-V TTL/CMOS logic families in bus-hold and clock distribution systems.
Technical Context
This device implements two independent 4-bit noninverting buffer groups (1A→1Y and 2A→2Y), each controlled by a dedicated active-low output-enable input (1OE, 2OE). Its EPIC-IIB BiCMOS process enables low power dissipation while maintaining TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2 V) and rail-to-rail output swing under load.
The SN74ABT2244APWR enters high-impedance state during power-up/down when VCC is between 0 and 2.1 V; above 2.1 V, OE must be pulled up to VCC via external resistor to guarantee tri-state behavior. Output ports integrate 25-Ω series resistors to suppress overshoot/undershoot without requiring external termination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures compatibility with standard 5-V logic rails and tolerance against supply ripple. |
| Output Sink Current | 12 mA per Y output - sufficient to drive multiple TTL inputs or short PCB traces without external buffering. |
| tPZL (OE→Y disable) | Max 8.3 ns at VCC = 5 V - enables fast bus release for time-critical multiplexed data paths. |
| VOL @ IOL = 12 mA | ≤ 0.8 V - guarantees solid logic-low margin across temperature and voltage extremes. |
| Input Clamp Current | –18 mA - protects inputs from negative transients exceeding –0.5 V, supporting robust ESD immunity. |
| Thermal Resistance θJA | 128°C/W (PW package) - informs thermal design margin for continuous operation at full output loading. |
Pinout & Package
TSSOP-20 (PW) package: 6.95 mm × 4.4 mm × 1.2 mm body, 0.65 mm lead pitch, exposed pad not present, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Controls group-wide 3-state behavior; OE = low enables outputs, OE = high disables all Y pins to high-Z. |
| 1A1–1A4, 2A1–2A4 | Noninverting data inputs | Eight parallel inputs grouped into two sets of four; no internal inversion - A drives Y directly. |
| 1Y1–1Y4, 2Y1–2Y4 | Noninverting 3-state outputs | Eight buffered outputs with integrated 25-Ω series resistance - reduces ringing on stubbed buses. |
| GND (Pin 10), VCC (Pin 11) | Power terminals | Dual-supply reference points; decoupling capacitor placement near Pin 10/11 is critical for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω output series resistors | Eliminates need for external termination resistors on PCB traces, reducing BOM count and layout area. |
| High-impedance during power sequencing | Outputs remain tri-stated when VCC is between 0 and 2.1 V - prevents bus contention during hot-plug or brownout events. |
| Low output ground bounce (VOLP < 1 V) | Minimizes simultaneous switching noise in dense digital systems, improving signal integrity on shared return paths. |
| Latch-up immunity > 500 mA | Meets JEDEC JESD-17 - ensures reliability in noisy industrial environments with transient coupling. |
| ESD protection > 2 kV HBM | Exceeds MIL-STD-883 Method 3015 - supports handling and assembly without special ESD controls. |
Applications
| Memory Address Buffering | Industrial Backplane Interface |
|---|---|
Use Scenario: Driving address lines from microcontroller to multiple SRAM/Flash devices on a shared bus. IC Role / Device Role / Timing Role: Noninverting octal buffer providing fan-out expansion and level translation between controller and memory chips. Use Value: Integrated 25-Ω resistors suppress reflections on long address traces, while 3-state control allows dynamic bus sharing among multiple masters. |
Use Scenario: Interfacing PLC CPU modules to I/O expansion cards over rigid 20-pin ribbon cable. IC Role / Device Role / Timing Role: Bidirectional bus driver isolating control signals and enabling hot-swap-safe enable/disable sequencing. Use Value: High-impedance power-up behavior prevents spurious writes during module insertion; tPZL ≤ 8.3 ns ensures deterministic bus arbitration. |
| Legacy Bus Repeater | Test Equipment Signal Conditioning |
Use Scenario: Extending signal reach of ISA or VMEbus control lines beyond trace-length limits. IC Role / Device Role / Timing Role: Low-skew repeater restoring signal amplitude and edge rate across segmented backplane segments. Use Value: Symmetrical tPLH/tPHL (≤ 4.7 ns) maintains timing budget; 12 mA drive sustains signal integrity over 15 cm FR-4 traces. |
Use Scenario: Conditioning DUT control signals (e.g., reset, chip select) in automated test fixtures. IC Role / Device Role / Timing Role: Glitch-free buffer isolating tester logic from DUT power domains and preventing backfeed. Use Value: Input clamp current (–18 mA) tolerates ±0.5 V fault conditions; wide VCC range accommodates fixture supply variations. |
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 |
|---|---|---|---|
| SN74ABT244APWR | Same pinout, identical electrical specs, but marked as commercial-grade ABT244 variant - functionally identical to SN74ABT2244APWR per TI documentation. | No functional difference; used interchangeably in non-military designs where ABT2244A/ABT244A part numbering reflects legacy catalog alignment. | Select SN74ABT244APWR only if sourcing constraints require alternate TI orderable ID; same footprint, timing, and drive strength. |
| 74LVT244PW,118 | 3.3-V optimized LVTH logic; lower VCC (2.7–3.6 V), higher speed (tPD ≈ 3.3 ns), but incompatible 5-V input tolerance - requires level-shifting. | Suitable for mixed-voltage 3.3-V systems with tighter timing budgets; not drop-in replaceable due to supply and interface mismatch. | Choose only when migrating to 3.3-V infrastructure; verify input voltage compatibility and add level shifters if interfacing with 5-V peripherals. |
Compared with SN74ABT244APWR, the SN74ABT2244APWR offers identical functionality and pin compatibility, whereas 74LVT244PW,118 demands system-level voltage redesign and introduces interface complexity - making SN74ABT2244APWR optimal for legacy 5-V bus expansion.
Availability
SN74ABT2244APWR is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory subsystem buffering, and legacy bus repeater applications requiring stable component supply and long-term lifecycle support.
Supply support for SN74ABT2244APWR 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 decades of heritage in high-reliability interface ICs.
The ABT logic family - including SN74ABT2244APWR - was engineered for robust 5-V bus driving in industrial and telecom infrastructure, emphasizing noise immunity, power efficiency, and seamless integration with TTL/CMOS systems.
FAQ
What is the maximum operating temperature for SN74ABT2244APWR?
The SN74ABT2244APWR is characterized for operation from –40°C to +85°C ambient temperature. This industrial-grade rating ensures reliable performance in factory automation controllers, motor drives, and outdoor communications equipment where thermal cycling occurs. The device maintains specified timing and drive strength across this full range, with no derating required up to 85°C.
Does SN74ABT2244APWR require external pull-up resistors on OE pins?
Yes - to guarantee high-impedance state when VCC exceeds 2.1 V, SN74ABT2244APWR requires OE pins (1OE, 2OE) to be tied to VCC through a pull-up resistor. The minimum value depends on the driver's current-sinking capability; typical designs use 4.7 kΩ to 10 kΩ. Without this, outputs may float or partially enable during power transitions.
Can SN74ABT2244APWR drive 50-pF loads reliably?
Yes - SN74ABT2244APWR switching characteristics (tPLH, tPHL) are specified with CL = 50 pF, confirming validated performance into standard logic loads. Its 25-Ω integrated series resistors dampen resonance, allowing stable operation even with board trace capacitance up to 50 pF without added termination components.
Is SN74ABT2244APWR pin-compatible with SN74ABT244APWR?
Yes - SN74ABT2244APWR and SN74ABT244APWR share identical TSSOP-20 (PW) pinout, electrical specifications, and functional behavior. TI documents them as functionally equivalent variants; the "2244" and "244" designations reflect historical catalog alignment, not functional divergence. They are interchangeable in PCB layouts.
What is the purpose of the 25-Ω series resistors on SN74ABT2244APWR outputs?
The 25-Ω series resistors integrated into each SN74ABT2244APWR output reduce signal overshoot and undershoot caused by transmission-line effects on PCB traces or cables. This eliminates the need for discrete 22–33 Ω surface-mount resistors, simplifying layout, lowering BOM cost, and improving signal fidelity in high-speed bus applications without sacrificing drive strength.
SN74ABT2244APWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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-TSSOP
SN74ABT2244APWR FAQ
1.How can I place an order for SN74ABT2244APWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT2244APWR 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 SN74ABT2244APWR reliable?
The price and inventory of SN74ABT2244APWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT2244APWR is usually 5 days.
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SN74ABT2244APWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT2244APWR 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 SN74ABT2244APWR?
For technical support, including SN74ABT2244APWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT2244APWR requirements.
6.How does Aetrix verify that SN74ABT2244APWR is sourced from the original manufacturer or authorized distributors?
All SN74ABT2244APWR 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 SN74ABT2244APWR meets industry standards.
7.What is the process for return or replacement of SN74ABT2244APWR?
All SN74ABT2244APWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT2244APWR, 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 SN74ABT2244APWR part is unused and in its original packaging.
Return procedure for SN74ABT2244APWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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