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Texas Instruments SN74ABT2244APW
- Part No.:
- SN74ABT2244APW
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ABT2244APW.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:457
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Product details
Overview
SN74ABT2244APW 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 integrated 25-Ω output series resistors, and delivers 12 mA sink capability per output - enabling clean signal integrity in high-speed TTL-compatible systems.
For engineers reviewing the SN74ABT2244APW datasheet, SN74ABT2244APW pinout, SN74ABT2244APW application, or SN74ABT2244APW equivalent, key selection criteria include its TSSOP-20 (PW) package, 3-state control via dual active-low OE inputs, 4.3 ns typical propagation delay (tPLH), latch-up immunity (>500 mA), and ESD robustness (>2000 V HBM).
Technical Context
This device implements two independent 4-bit noninverting buffer sections, each controlled by a dedicated active-low output-enable (OE) input. Its EPIC-IIB BiCMOS process enables low power dissipation while maintaining TTL-level drive strength and fast switching.
The outputs incorporate on-die 25-Ω series termination to suppress overshoot/undershoot without external components. During power-up/down (VCC between 0–2.1 V), outputs enter high-impedance state automatically - eliminating bus contention risks before system initialization completes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL and mixed-voltage logic systems. |
| Output Drive | 12 mA sink per Y output - sufficient to drive multiple TTL loads or terminated transmission lines. |
| Propagation Delay | 4.3 ns typical (tPLH at VCC = 5 V, CL = 50 pF) - supports >100 MHz bus operation with tight timing margins. |
| 3-State Enable Time | 4.8 ns typical (tPZH) - enables rapid bus arbitration and dynamic signal routing in multiplexed architectures. |
| ESD Rating | >2000 V HBM - meets MIL-STD-883 Method 3015, reducing risk of handling damage in manufacturing environments. |
| Latch-Up Immunity | >500 mA per JEDEC JESD-17 - prevents destructive current runaway during transient overvoltage events. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control, instrumentation, and communications equipment. |
Pinout & Package
TSSOP-20 (PW) package: 6.6 mm × 4.4 mm footprint, 1.2 mm max height, 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 | Independent control of Group 1 (Y1–Y4) and Group 2 (Y1–Y4) outputs; asserted low enables buffers. |
| 1A1–1A4, 2A1–2A4 | Input data lines | Eight total noninverting inputs - four per group, aligned for byte-wide address/data bus interfacing. |
| 1Y1–1Y4, 2Y1–2Y4 | 3-state buffered outputs | Octal noninverting outputs with integrated 25-Ω series resistance - eliminates need for external termination. |
| VCC, GND | Power supply terminals | Single 5-V supply; internal power sequencing ensures high-Z state during VCC ramp (0–2.1 V range). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω output series resistors | Reduces signal reflections and ringing on PCB traces - no external termination components required. |
| Automatic high-impedance during power transition | Guarantees bus isolation when VCC is below 2.1 V - prevents back-driving or contention during power-up/down. |
| EPIC-IIB BiCMOS technology | Combines bipolar speed and CMOS low static power - achieves 4.3 ns propagation delay with sub-30 mA ICC active current. |
| 2000 V HBM ESD protection | Exceeds MIL-STD-883 requirements - enhances reliability in automated assembly and field-deployed systems. |
| Symmetrical active-low OE inputs | Enables independent control of two 4-bit groups - simplifies timing-critical bus gating and memory bank selection. |
Applications
| Memory Address Buffering | Bus Transceiver Interface |
|---|---|
|
Use Scenario: Driving 16-bit address bus from microcontroller to SRAM or Flash memory with minimal trace length. IC Role / Device Role / Timing Role: Noninverting octal buffer providing fan-out expansion and noise-immune signal conditioning. Use Value: Integrated 25-Ω series resistors suppress overshoot on parallel address lines, improving setup/hold margin at >20 MHz clock rates. |
Use Scenario: Isolating bidirectional data bus between FPGA and peripheral ICs using discrete direction control. IC Role / Device Role / Timing Role: 3-state line driver enabling time-multiplexed read/write cycles without bus contention. Use Value: Dual OE inputs allow precise per-group enable timing - critical for meeting tEN/tDIS specs in synchronous bus protocols. |
| Clock Distribution Network | Industrial I/O Expansion |
|
Use Scenario: Distributing system clock or strobe signals to multiple timing-critical peripherals (ADCs, DACs, timers). IC Role / Device Role / Timing Role: Low-skew, noninverting buffer with matched propagation delays across all eight outputs. Use Value: 4.3 ns typical tPLH and 5.3 ns typical tPHL ensure <1 ns inter-output skew - preserving clock edge alignment. |
Use Scenario: Expanding GPIO count on PLC or motor controller by buffering digital inputs/outputs to sensors and actuators. IC Role / Device Role / Timing Role: Robust interface device handling industrial voltage transients and long cable runs. Use Value: >500 mA latch-up immunity and 2000 V HBM rating withstand harsh EMI environments common in factory automation. |
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 |
|---|---|---|---|
| SN74ABT2244ADBR | SSOP-20 (DB) package; identical electrical specs and pinout; thermal impedance 115°C/W vs. PW's 128°C/W. | Preferred for higher-power-density layouts where board space permits wider 5.3-mm body; same JEDEC MO-150 footprint. | Select SN74ABT2244ADBR if thermal management prioritizes lower θJA over footprint size; otherwise SN74ABT2244APW offers superior area efficiency. |
| SN74LVC244APWR | 3.3-V only (1.65–3.6 V); LVCMOS logic levels; 24 mA drive; no integrated series resistors; 3.5 ns tPLH. | Requires level-shifting for 5-V systems; lacks built-in termination - needs external 33-Ω resistors for clean edges. | Choose SN74LVC244APWR only in pure 3.3-V domains with strict speed/power trade-offs; SN74ABT2244APW remains optimal for legacy 5-V TTL interoperability. |
Compared with SN74ABT2244ADBR and SN74LVC244APWR, the SN74ABT2244APW uniquely combines 5-V TTL compatibility, on-die 25-Ω termination, and compact TSSOP-20 packaging - making it the most direct solution for industrial bus buffering where signal integrity and footprint constraints coexist.
Availability
SN74ABT2244APW is available at Aetrix Electronics and suitable for memory address buffering, bus transceiver interfaces, clock distribution networks, and industrial I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74ABT2244APW 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 logic families and industrial-grade qualification.
The SN74ABT2244APW belongs to TI's ABT-series advanced biCMOS logic family, engineered specifically for high-speed, low-noise 5-V bus interfacing in memory subsystems, industrial controllers, and communications infrastructure.
FAQ
What is the operating voltage range for SN74ABT2244APW?
The SN74ABT2244APW operates from 4.5 V to 5.5 V DC. This range ensures full compatibility with standard 5-V TTL systems and accommodates typical power supply tolerances. Operation outside this range may cause functional failure or permanent damage, as specified in the absolute maximum ratings table of the official datasheet.
Does SN74ABT2244APW require external pull-up resistors on its OE inputs?
Yes - to guarantee high-impedance output state above 2.1 V during power-up, OE inputs should be tied to VCC via a pull-up resistor. The minimum value depends on the driving source's current-sinking capability; TI recommends verifying against the specific driver's IOL rating to avoid unintended enablement.
How does the integrated 25-Ω series resistor in SN74ABT2244APW improve signal integrity?
The integrated 25-Ω series resistor in each output of SN74ABT2244APW dampens signal reflections on PCB traces, reducing overshoot and undershoot without requiring external components. This feature maintains clean edges on fast-switching buses - especially beneficial for stub-free routing in memory and address applications.
Is SN74ABT2244APW pin-compatible with other packages in the same family?
Yes - SN74ABT2244APW shares identical pinout and functionality with SN74ABT2244ADBR (SSOP), SN74ABT2244ADW (SOIC), and SN74ABT2244AN (PDIP). All variants use the same 20-pin configuration and logic mapping, enabling drop-in replacement across package types based on mechanical or thermal requirements.
What is the thermal performance of SN74ABT2244APW in its TSSOP-20 (PW) package?
The SN74ABT2244APW in TSSOP-20 (PW) package has a junction-to-ambient thermal resistance (θJA) of 128°C/W under standard JEDEC test conditions. This value assumes a 1-inch² copper pad; actual performance improves significantly with enhanced PCB copper area or thermal vias beneath the package body.
SN74ABT2244APW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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
SN74ABT2244APW FAQ
1.How can I place an order for SN74ABT2244APW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT2244APW 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 SN74ABT2244APW reliable?
The price and inventory of SN74ABT2244APW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT2244APW is usually 5 days.
3.What payment methods are accepted for SN74ABT2244APW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT2244APW transactions.
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4.How is shipping managed for SN74ABT2244APW?
SN74ABT2244APW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT2244APW 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 SN74ABT2244APW?
For technical support, including SN74ABT2244APW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT2244APW requirements.
6.How does Aetrix verify that SN74ABT2244APW is sourced from the original manufacturer or authorized distributors?
All SN74ABT2244APW 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 SN74ABT2244APW meets industry standards.
7.What is the process for return or replacement of SN74ABT2244APW?
All SN74ABT2244APW units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT2244APW, 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 SN74ABT2244APW part is unused and in its original packaging.
Return procedure for SN74ABT2244APW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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