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Texas Instruments SN74ABT2244ADWR
- Part No.:
- SN74ABT2244ADWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT2244ADWR.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,511
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Product details
Overview
SN74ABT2244ADWR 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, sinks up to 12 mA per output, features integrated 25-Ω series output resistors, and is characterized for –40°C to 85°C operation in SOIC (DW) package.
For engineers reviewing the SN74ABT2244ADWR datasheet, SN74ABT2244ADWR pinout, SN74ABT2244ADWR application, or SN74ABT2244ADWR equivalent, key selection criteria include 3-state bus driving capability, output ground bounce <1 V, high-impedance state during power-up/down, and compatibility with TTL-level control signals.
Technical Context
This device integrates two independent 4-bit noninverting buffers, each with symmetrical active-low output-enable (OE) inputs. Its EPIC-IIB BiCMOS process enables low power dissipation while maintaining TTL-compatible input thresholds and 5-V CMOS output drive strength.
The output stage includes on-die 25-Ω series resistors to suppress overshoot/undershoot without external termination. High-impedance behavior is guaranteed below 2.1 V VCC, and OE must be pulled up above that threshold to ensure disable-state integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures robust operation across standard 5-V supply tolerances. |
| IOL per Output | 12 mA - Supports direct interface to TTL loads and moderate-capacitance buses. |
| tPLH/tPHL | ≤4.7 ns / ≤5.6 ns at 5 V - Enables high-speed data routing in address/data paths. |
| VOH (IOH = –24 mA) | ≥2.0 V - Maintains valid logic-high margin under heavy sink load conditions. |
| VOL (IOL = 12 mA) | ≤0.8 V - Guarantees solid logic-low level even when driving multiple TTL inputs. |
| VOLP (Ground Bounce) | <1 V at VCC = 5 V - Reduces noise coupling into shared ground planes during switching. |
| Input Thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V - Fully compatible with standard TTL input voltage levels. |
Pinout & Package
SN74ABT2244ADWR is housed in a 20-pin SOIC (DW) package, 7.5 mm × 12.8 mm body size, 2.65 mm maximum height, with 1.27 mm lead pitch and gull-wing leads. Pin 1 index area located at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Independent control of each 4-bit buffer group; low = enabled, high = high-Z. |
| 1A1–1A4, 2A1–2A4 | Noninverting data inputs | Eight buffered inputs, grouped as two sets of four; no inversion applied. |
| 1Y1–1Y4, 2Y1–2Y4 | Noninverting 3-state outputs | Eight outputs with integrated 25-Ω series resistance; driven only when respective OE is low. |
| VCC (Pin 10) | Positive supply | 5-V nominal supply connection; decoupling required near pin for noise suppression. |
| GND (Pin 20) | Ground reference | Common return path for all I/O and internal circuitry; critical for ground-bounce control. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω output series resistors | Eliminates need for external termination components, reducing PCB area and BOM count. |
| High-impedance during power-up/down | Prevents bus contention when VCC is between 0 V and 2.1 V, enhancing system reliability. |
| EPIC-IIB BiCMOS process | Combines bipolar speed and CMOS low static power, achieving <1 V output ground bounce. |
| TTL-compatible input thresholds | Accepts standard 0.8 V/2.0 V logic levels without level-shifting circuitry. |
| Latch-up immunity >500 mA | Meets JEDEC JESD-17, enabling robust operation in noisy industrial environments. |
Applications
| Memory Address Buffering | Bus Transceiver Interface |
|---|---|
Use Scenario: Driving address lines from microcontroller to SRAM or ROM chips in embedded systems. IC Role / Device Role / Timing Role: Noninverting octal buffer providing fan-out expansion and noise-immune signal transmission. Use Value: Integrated 25-Ω resistors suppress ringing on long traces, and 3-state outputs prevent contention during memory access arbitration. | Use Scenario: Isolating bidirectional data buses between processor and peripheral ICs. IC Role / Device Role / Timing Role: Unidirectional line driver used in half-duplex bus configurations with external direction control. Use Value: Low propagation delay (≤5.6 ns) ensures timing compliance in 25-MHz+ parallel bus systems. |
| Clock Distribution Network | Legacy Peripheral Interface |
Use Scenario: Distributing system clock or strobe signals to multiple synchronous peripherals. IC Role / Device Role / Timing Role: Low-skew, noninverting buffer with matched tPLH/tPHL for clock fan-out. Use Value: Ground bounce <1 V minimizes jitter injection into sensitive clock domains. | Use Scenario: Interfacing modern controllers with legacy parallel peripherals (e.g., printers, displays). IC Role / Device Role / Timing Role: Level-translating and drive-strengthening buffer for TTL-compatible signaling. Use Value: 12-mA sink capability directly drives multiple 74LS-series inputs without additional drivers. |
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 |
|---|---|---|---|
| SN74ABT244N | Same ABT family, identical pinout and electrical specs; differs only in PDIP (N) packaging. | Requires through-hole PCB assembly; lacks tape-and-reel support for automated SMT placement. | Select SN74ABT244N only for prototyping or legacy through-hole designs where SOIC is not feasible. |
| SN74LVC244APWR | 3.3-V logic family; lower VCC range (1.65–3.6 V); higher speed (tPD ≤ 3.9 ns), but no integrated 25-Ω resistors. | Not suitable for 5-V bus systems; requires external termination or level-shifting for mixed-voltage interfaces. | Choose SN74LVC244APWR only in pure 3.3-V designs where lower power and higher speed outweigh termination flexibility. |
Compared with SN74ABT244N and SN74LVC244APWR, SN74ABT2244ADWR uniquely delivers 5-V bus drive with on-die termination and guaranteed high-Z during power sequencing-making it optimal for industrial 5-V backplane and memory subsystems.
Availability
SN74ABT2244ADWR is available at Aetrix Electronics and suitable for memory address buffering, parallel bus interfacing, clock distribution networks, and legacy peripheral connectivity requiring stable component supply and long-term industrial availability.
Supply support for SN74ABT2244ADWR 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 90 years of innovation in high-reliability IC design.
The ABT logic family-including SN74ABT2244ADWR-is engineered for high-speed, low-noise 5-V bus applications in industrial, computing, and communications infrastructure where signal integrity and power-up safety are critical.
FAQ
What is the operating temperature range for SN74ABT2244ADWR?
The SN74ABT2244ADWR is characterized for operation from –40°C to +85°C ambient temperature. This industrial-grade range supports deployment in factory automation, networking equipment, and outdoor embedded systems where thermal stability is essential. The device maintains full electrical specifications across this range, including output drive strength and propagation delay.
Does SN74ABT2244ADWR require external pull-up resistors on its OE pins?
Yes - to guarantee high-impedance output state when VCC exceeds 2.1 V, OE pins must be tied to VCC via a pull-up resistor. The minimum value depends on the current-sinking capability of the driving source; TI recommends ≥10 kΩ for typical microcontroller GPIO control. Without this, outputs may inadvertently enable during partial power-up sequences.
Can SN74ABT2244ADWR drive standard TTL loads directly?
Yes - SN74ABT2244ADWR can directly drive standard TTL loads: each output sinks up to 12 mA (exceeding the 1.6 mA requirement of 74LS inputs) and sources up to 24 mA (meeting 74ALS/AS fan-out needs). Its VOH ≥2.0 V and VOL ≤0.8 V at rated loads ensure full TTL logic-level compatibility without level shifters.
What is the significance of the "25-Ω series resistors" specified for SN74ABT2244ADWR outputs?
The integrated 25-Ω series resistors in SN74ABT2244ADWR reduce signal edge overshoot and undershoot on PCB traces, eliminating the need for discrete series termination. This simplifies layout, cuts BOM cost, and improves signal integrity on stubbed or unterminated buses - especially critical in dense 5-V memory and address routing applications.
Is SN74ABT2244ADWR pin-compatible with other ABT-family octal buffers?
Yes - SN74ABT2244ADWR shares identical pinout and function with SN74ABT2244ADW (tube), SN74ABT2244ADBR (SSOP), and SN74ABT2244APWR (TSSOP). All variants use the same 20-pin functional mapping, enabling drop-in replacement across SOIC, SSOP, and TSSOP packages without PCB redesign.
SN74ABT2244ADWR 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:
- 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-SOIC
SN74ABT2244ADWR FAQ
1.How can I place an order for SN74ABT2244ADWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT2244ADWR 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 SN74ABT2244ADWR reliable?
The price and inventory of SN74ABT2244ADWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT2244ADWR is usually 5 days.
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Once your SN74ABT2244ADWR 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 SN74ABT2244ADWR?
For technical support, including SN74ABT2244ADWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT2244ADWR requirements.
6.How does Aetrix verify that SN74ABT2244ADWR is sourced from the original manufacturer or authorized distributors?
All SN74ABT2244ADWR 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 SN74ABT2244ADWR meets industry standards.
7.What is the process for return or replacement of SN74ABT2244ADWR?
All SN74ABT2244ADWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT2244ADWR, 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 SN74ABT2244ADWR part is unused and in its original packaging.
Return procedure for SN74ABT2244ADWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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