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Texas Instruments SN74ABT2244ADWRE4
- Part No.:
- SN74ABT2244ADWRE4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT2244ADWRE4.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,762
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Product details
Overview
SN74ABT2244ADWRE4 from Texas Instruments is an octal noninverting 3-state buffer/line driver IC designed for high-density bus interfacing in memory address, clock distribution, and data transmission systems. It operates from 4.5 V to 5.5 V, supports ±12 mA output drive per channel, features integrated 25-Ω series output resistors to suppress overshoot/undershoot, and maintains high-impedance state during power-up/down (VCC < 2.1 V).
For engineers reviewing the SN74ABT2244ADWRE4 datasheet, SN74ABT2244ADWRE4 pinout, SN74ABT2244ADWRE4 application, or SN74ABT2244ADWRE4 equivalent, this device is selected for robust 5-V TTL-compatible bus buffering where low ground bounce (<1 V), latch-up immunity (>500 mA), and ESD protection (>2000 V HBM) are critical in industrial and embedded control designs.
Technical Context
This BiCMOS device implements two independent 4-bit noninverting buffer groups (1A→1Y and 2A→2Y), each controlled by a dedicated active-low 3-state enable input (1OE, 2OE). Its EPIC-IIB architecture delivers reduced power dissipation versus standard ABT families while maintaining TTL-level input thresholds (VIL = 0.8 V, VVIH = 2.0 V) and fast propagation delays (tPLH/tPHL ≤ 4.7 ns at 5 V, 25°C).
The outputs exhibit symmetrical drive capability (IOL = 12 mA, IOH = –24 mA), built-in 25-Ω series termination eliminates external resistors, and power-on/power-off high-impedance behavior ensures glitch-free bus arbitration without external sequencing circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures compatibility with standard 5-V TTL and CMOS logic rails. |
| IOL / IOH | 12 mA sink / –24 mA source - Supports direct driving of multiple TTL loads or stub-loaded buses. |
| tPLH/tPHL | ≤ 4.7 ns (max) - Enables reliable operation in high-speed address/data paths up to ~100 MHz. |
| VOL / VOH | ≤ 0.8 V @ 12 mA / ≥ 2.0 V @ –24 mA - Guarantees noise margins >0.4 V under full load. |
| Input Thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V - Matches standard TTL logic levels for seamless interface with legacy systems. |
| ESD Rating | >2000 V HBM - Meets MIL-STD-883 Method 3015, enabling use in unshielded industrial environments. |
| Latch-Up Immunity | >500 mA per JESD17 - Prevents destructive current runaway during transient overvoltage events. |
Pinout & Package
SN74ABT2244ADWRE4 is packaged in a 20-pin SOIC (DW) package with 0.300-inch body width, 1.27 mm lead pitch, and 2.65 mm maximum height. Pin 1 is located at the top-left corner with a beveled edge or index mark.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Independent control of Group 1 (pins 1A1–1A4 → 1Y1–1Y4) and Group 2 (2A1–2A4 → 2Y1–2Y4); asserted low enables outputs. |
| 1A1–1A4, 2A1–2A4 | Buffer inputs | Eight noninverting data inputs arranged in two 4-bit groups; TTL-compatible voltage thresholds. |
| 1Y1–1Y4, 2Y1–2Y4 | 3-state buffered outputs | Eight noninverting outputs with integrated 25-Ω series resistance; high-Z when OE high. |
| VCC (Pin 10) | Power supply | 5-V supply connection; decoupling capacitor required near pin for stable switching performance. |
| GND (Pin 20) | Ground reference | Common return path for all I/O and internal circuitry; must be low-inductance connection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω series output resistors | Eliminates need for external termination resistors on PCB, reducing component count and layout complexity for stub-matched buses. |
| Power-up/power-down high-impedance | Outputs remain in high-Z state when VCC is below 2.1 V, preventing bus contention during supply ramping or brownout conditions. |
| Low ground bounce (VOLP < 1 V) | Minimizes simultaneous switching noise on shared ground planes, improving signal integrity in dense digital systems. |
| EPIC-IIB BiCMOS process | Reduces dynamic power consumption versus standard bipolar ABT families while retaining high-speed performance and drive strength. |
| High fan-out capability | Each output drives ≥10 LSTTL loads, enabling direct connection to multiple downstream receivers without intermediate buffers. |
Applications
| Memory Address Buffering | Industrial Bus Transceiver |
|---|---|
Use Scenario: Driving multiplexed address lines from a microcontroller to multiple SRAM or flash devices on a shared bus. IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing level translation, fan-out expansion, and bus isolation between controller and memory array. Use Value: Integrated 25-Ω output resistors suppress ringing on long traces, while high-impedance disable prevents address corruption during memory access arbitration. |
Use Scenario: Interfacing PLC I/O modules to a central backplane with strict EMI and reliability requirements. IC Role / Device Role / Timing Role: Robust 5-V bus driver handling hot-swap transitions and noisy industrial ground environments. Use Value: >500 mA latch-up immunity and >2000 V HBM ESD rating ensure operational continuity in electrically harsh factory settings. |
| Clock Distribution Network | Legacy System Interface Adapter |
Use Scenario: Distributing a system clock signal to multiple synchronous peripherals (ADCs, DACs, FPGAs) with matched skew. IC Role / Device Role / Timing Role: Low-skew, noninverting buffer replicating clock edges with minimal added jitter and propagation delay variation. Use Value: tPLH/tPHL ≤ 4.7 ns and symmetrical rise/fall times maintain tight timing budgets across distributed clock domains. |
Use Scenario: Bridging modern microcontrollers to legacy parallel peripherals (dot-matrix displays, thermal printers) requiring TTL-level signaling. IC Role / Device Role / Timing Role: Voltage- and level-compatible buffer translating between MCU GPIOs and legacy 5-V TTL input interfaces. Use Value: Guaranteed VIH ≥ 2.0 V and VIL ≤ 0.8 V ensure reliable recognition of logic states across temperature and voltage tolerances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal noninverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT2244ADWR | Same die, identical electrical specs, SOIC-DW package with NIPDAU lead finish and tape-and-reel packaging (2000 pcs/reel). | No functional difference; differs only in packaging format and RoHS compliance marking. | Select SN74ABT2244ADWR for automated SMT assembly; SN74ABT2244ADWRE4 is functionally identical but may reflect specific TI internal revision or lot trace coding. |
| SN74ABT2244APWR | TSSOP-20 (PW) package, 1.2 mm max height, 0.65 mm pitch - smaller footprint and better thermal performance (θJA = 128°C/W vs. 97°C/W for DW). | Suitable for space-constrained boards; requires adjusted land pattern and stencil design per JEDEC MO-153. | Choose SN74ABT2244APWR when board area is limited or higher thermal efficiency is needed; verify PCB layout against TI's PW0020A package outline. |
Compared with SN74ABT2244ADWRE4, SN74ABT2244ADWR offers identical performance in a standard SOIC tube/reel format ideal for high-volume production, while SN74ABT2244APWR provides a compact, thermally enhanced alternative for miniaturized industrial controllers-both require no schematic changes but differ in mechanical integration requirements.
Availability
SN74ABT2244ADWRE4 is available at Aetrix Electronics and suitable for industrial automation, embedded control, and legacy system upgrade projects requiring stable component supply, long-term lifecycle support, and guaranteed 5-V TTL-compatible bus buffering performance.
Supply support for SN74ABT2244ADWRE4 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.
The SN74ABT2244ADWRE4 belongs to TI's ABT logic family, engineered for high-speed, low-noise 5-V bus interfacing in industrial, computing, and communications infrastructure where signal integrity and robustness are paramount.
FAQ
What is the operating temperature range for SN74ABT2244ADWRE4?
SN74ABT2244ADWRE4 is characterized for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. This range is specified in the recommended operating conditions table of the SCBS106E datasheet and applies to all SOIC (DW) packaged variants including SN74ABT2244ADWRE4. Operation outside this range may result in parametric degradation or functional failure.
Does SN74ABT2244ADWRE4 require external pull-up resistors on its OE pins?
Yes - to guarantee high-impedance state when VCC exceeds 2.1 V, OE inputs must be actively pulled high. The minimum pull-up resistor value depends on the current-sinking capability of the driving source; TI recommends tying OE to VCC via a resistor sized to limit current to ≤10 µA under worst-case VIH conditions. SN74ABT2244ADWRE4 does not include internal pull-ups.
Can SN74ABT2244ADWRE4 drive 50-pF loads reliably at 50 MHz?
Yes - with CL = 50 pF, SN74ABT2244ADWRE4 achieves tPLH/tPHL ≤ 4.7 ns and exhibits low ground bounce (<1 V), enabling clean signal edges at 50 MHz clock rates. Its 25-Ω integrated series resistors further dampen reflections on properly terminated traces, making it suitable for moderate-speed bus applications without external termination.
Is SN74ABT2244ADWRE4 RoHS compliant and lead-free?
Yes - SN74ABT2244ADWRE4 uses NiPdAu (NIPDAU) lead finish and is RoHS compliant per TI's packaging documentation. The "E4" suffix denotes TI's standard green, lead-free, halogen-free packaging specification, verified through material declarations and reflow profile validation per JEDEC J-STD-020.
How does the 25-Ω series resistor in SN74ABT2244ADWRE4 improve signal integrity?
The 25-Ω series resistor integrated into each output of SN74ABT2244ADWRE4 acts as a source termination that matches typical PCB trace impedances (50–75 Ω), reducing signal reflections, overshoot, and undershoot. This eliminates discrete resistors, saves board space, and improves consistency across all eight channels - especially critical in parallel bus applications like memory addressing or data latching.
SN74ABT2244ADWRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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-SOIC
SN74ABT2244ADWRE4 FAQ
1.How can I place an order for SN74ABT2244ADWRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT2244ADWRE4 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 SN74ABT2244ADWRE4 reliable?
The price and inventory of SN74ABT2244ADWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT2244ADWRE4 is usually 5 days.
3.What payment methods are accepted for SN74ABT2244ADWRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT2244ADWRE4 transactions.
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4.How is shipping managed for SN74ABT2244ADWRE4?
SN74ABT2244ADWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT2244ADWRE4 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 SN74ABT2244ADWRE4?
For technical support, including SN74ABT2244ADWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT2244ADWRE4 requirements.
6.How does Aetrix verify that SN74ABT2244ADWRE4 is sourced from the original manufacturer or authorized distributors?
All SN74ABT2244ADWRE4 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 SN74ABT2244ADWRE4 meets industry standards.
7.What is the process for return or replacement of SN74ABT2244ADWRE4?
All SN74ABT2244ADWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT2244ADWRE4, 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 SN74ABT2244ADWRE4 part is unused and in its original packaging.
Return procedure for SN74ABT2244ADWRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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