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Texas Instruments SN74ABT244APW
- Part No.:
- SN74ABT244APW
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ABT244APW.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,072
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Product details
Overview
SN74ABT244APW from Texas Instruments is a dual 4-bit noninverting 3-state buffer/line driver in a 20-pin TSSOP package, operating at 4.5–5.5 V with high-drive outputs (−32 mA IOH, 64 mA IOL), low output ground bounce (<1 V), and industrial temperature range (−40°C to 85°C). It serves as a bus-oriented transmitter for memory address and clock distribution in industrial control backplanes.
For engineers reviewing the SN74ABT244APW datasheet, SN74ABT244APW pinout, SN74ABT244APW application, or SN74ABT244APW equivalent, key selection criteria include its 3-state enable logic, symmetric active-low OE inputs, EPIC-II™ BiCMOS process for low power dissipation, latch-up immunity (>500 mA), and ESD robustness (>2000 V HBM).
Technical Context
The SN74ABT244APW implements two independent 4-bit noninverting buffers, each with dedicated active-low output-enable (OE) inputs. Data propagates from A inputs to Y outputs when OE is low; outputs enter high-impedance state when OE is high. Power-up/down sequencing requires OE tied to VCC via pullup resistor to ensure defined 3-state behavior.
Its EPIC-II™ BiCMOS architecture delivers TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V), fast switching (tPLH/tPHL ≤ 4.6 ns @ 5 V, CL = 50 pF), and rail-to-rail output drive capability while maintaining low ICC (≤30 mA active, ≤250 µA disabled). Input and output clamping supports robust operation under transient conditions.
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 systems without level-shifting. |
| Output drive | −32 mA IOH / 64 mA IOL - enables direct driving of heavy capacitive loads (e.g., >100 pF buses) and fanout of ≥32 LSTTL loads. |
| Propagation delay | tPLH/tPHL ≤ 4.6 ns @ 5 V - supports high-speed data transfer in 25-MHz+ bus applications with tight timing margins. |
| 3-state enable time | tPZL/tPHZ ≤ 6.1 ns @ 5 V - guarantees rapid bus release and acquisition critical for shared-memory arbitration and hot-swap interfaces. |
| Operating temperature | −40°C to 85°C - qualified for industrial environments including factory automation, motor drives, and programmable logic controllers. |
| ESD rating | 2000 V HBM - exceeds JEDEC JS-001 Class 2, reducing susceptibility to handling damage during PCB assembly and field service. |
| Latch-up immunity | >500 mA per JESD-17 - prevents destructive latch-up during supply transients or I/O overvoltage events in noisy industrial settings. |
Pinout & Package
SN74ABT244APW uses a 20-pin Thin Shrink Small-Outline Package (TSSOP-PW), 6.5 mm × 4.4 mm footprint, 1.2 mm max height, RoHS-compliant NiPdAu lead finish, and moisture sensitivity level (MSL) 1 (unlimited floor life at ≤30°C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Independent control of each 4-bit buffer group; must be pulled high externally during power-up to avoid bus contention. |
| 1A1–1A4, 2A1–2A4 | Data inputs | Noninverting inputs for respective buffer sections; TTL-compatible thresholds allow direct connection to microcontroller GPIO or FPGA I/O banks. |
| 1Y1–1Y4, 2Y1–2Y4 | 3-state outputs | High-drive buffered outputs capable of sinking 64 mA or sourcing −32 mA; compatible with 50-pF transmission lines and stub-loaded buses. |
| VCC, GND | Power supply | Dual supply pins (Pin 10 = VCC, Pin 20 = GND) minimize ground bounce; decoupling capacitor placement near Pin 10 is critical for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| EPIC-II™ BiCMOS process | Reduces dynamic power by >40% vs. legacy bipolar TTL while retaining full 5-V drive strength and speed. |
| Symmetric active-low OE | Enables clean, simultaneous bus release across both 4-bit groups-critical for deterministic arbitration in multi-master systems. |
| Output ground bounce <1 V | Minimizes signal integrity degradation on shared ground planes, enabling reliable operation in dense PCB layouts with multiple drivers. |
| Input clamp current ±18 mA | Allows safe operation with input voltages up to −0.5 V or 7 V, supporting hot-plug detection and fault-tolerant interface design. |
| Thermal impedance θJA = 128°C/W | Supports continuous operation at full drive strength in ambient temperatures up to 70°C without forced airflow or heatsinking. |
Applications
| Memory Address Buffering | Industrial Backplane Interface |
|---|---|
Use Scenario: Driving multiplexed address lines between microcontroller and SRAM/Flash in PLC mainboards. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating CPU address bus from memory subsystem during DMA cycles. Use Value: High sink current (64 mA) ensures fast edge rates into 50-pF trace + load capacitance, meeting 70-ns access time requirements. | Use Scenario: Level-shifting and bus-driving between isolated controller modules in modular I/O chassis. IC Role / Device Role / Timing Role: Bidirectional bus transmitter enabling hot-swappable module insertion without system reset. Use Value: Symmetric OE control and <1-V ground bounce prevent data corruption during concurrent module insertion/removal events. |
| Clock Distribution Network | Legacy Bus Interface Adapter |
Use Scenario: Fanout of system clock to multiple peripheral ICs (ADCs, DACs, timers) in test equipment. IC Role / Device Role / Timing Role: Low-skew, high-drive clock buffer with matched tPLH/tPHL ensuring <100-ps skew across all 8 outputs. Use Value: 4.6-ns max propagation delay maintains setup/hold margins for 100-MHz clock domains with 2-ns jitter budgets. | Use Scenario: Interfacing modern microcontrollers to legacy ISA or VMEbus peripherals requiring 5-V TTL signaling. IC Role / Device Role / Timing Role: Voltage- and timing-compliant bus transceiver translating 3.3-V GPIO to full 5-V TTL levels. Use Value: VIH = 2 V and VIL = 0.8 V guarantee reliable recognition of 3.3-V logic highs/lows without external biasing resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244APW | 3.3-V only supply (1.65–3.6 V); lower drive (−24 mA / 24 mA); CMOS process. | Not suitable for 5-V bus systems; requires level translation when interfacing with legacy 5-V peripherals. | Select when system operates entirely at 3.3 V and ultra-low static power (<1 µA ICC) is prioritized over drive strength. |
| SN74ABT240APW | Inverting output logic (vs. noninverting); identical pinout, drive, and timing specs. | Requires logic inversion in upstream signal path; unsuitable where signal polarity must be preserved end-to-end. | Choose only if system architecture mandates inverted enable or data paths-otherwise SN74ABT244APW preserves signal polarity transparently. |
Compared with SN74LVC244APW and SN74ABT240APW, the SN74ABT244APW uniquely delivers 5-V TTL compatibility, noninverting logic, and industrial-grade drive strength without level shifters or polarity compensation, making it optimal for retrofitting legacy 5-V bus infrastructure.
Availability
SN74ABT244APW is available at Aetrix Electronics and suitable for industrial control backplanes, memory subsystem buffering, clock distribution networks, and legacy bus interface adapters requiring stable component supply across extended product lifecycles.
Supply support for SN74ABT244APW 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 industrial, automotive, and communications markets.
The SN74ABT244APW belongs to TI's ABT logic family-designed specifically for high-speed, high-drive 3-state bus interfacing in industrial and computing applications where signal integrity, noise immunity, and thermal reliability are critical.
FAQ
What is the maximum recommended operating temperature for the SN74ABT244APW?
The SN74ABT244APW is characterized for operation from −40°C to +85°C. This industrial temperature range ensures reliable performance in factory automation, motor control, and outdoor instrumentation environments where ambient temperatures exceed commercial-grade limits. Operation beyond 85°C may cause parametric drift or accelerated wear-out.
Does the SN74ABT244APW require external pull-up resistors on its OE pins?
Yes-the SN74ABT244APW OE pins are active-low and must be held high during power-up and power-down to ensure outputs remain in high-impedance state. A pull-up resistor to VCC (typically 4.7 kΩ–10 kΩ) is required; minimum value depends on the current-sinking capability of the driving source, as specified in the datasheet.
Can the SN74ABT244APW drive a 100-pF load at 25 MHz?
Yes-the SN74ABT244APW delivers 64-mA sink current and exhibits ≤4.6 ns propagation delay into 50-pF loads. At 100-pF, rise/fall times remain within specification due to its high drive strength, supporting 25-MHz bus operation with adequate timing margin. Layout best practices (short traces, ground plane) are recommended to maintain signal fidelity.
Is the SN74ABT244APW pin-compatible with other packages in the same family?
Yes-the SN74ABT244APW shares identical pinout and functionality with SN74ABT244ADB (SSOP), SN74ABT244ADW (SOIC), and SN74ABT244AN (PDIP). All variants use the same 20-pin configuration, logic behavior, and electrical specifications, enabling drop-in replacement across package types based on board space and thermal requirements.
What is the purpose of the EPIC-II™ BiCMOS process used in the SN74ABT244APW?
The EPIC-II™ BiCMOS process combines bipolar transistors for high-speed switching and CMOS circuitry for low static power. In the SN74ABT244APW, this architecture achieves TTL-compatible drive strength and speed while reducing power dissipation significantly versus pure bipolar designs-enabling higher density and cooler operation in thermally constrained industrial PCBs.
SN74ABT244APW 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, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74ABT244APW FAQ
1.How can I place an order for SN74ABT244APW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT244APW 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 SN74ABT244APW reliable?
The price and inventory of SN74ABT244APW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT244APW is usually 5 days.
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT244APW?
SN74ABT244APW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT244APW 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 SN74ABT244APW?
For technical support, including SN74ABT244APW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT244APW requirements.
6.How does Aetrix verify that SN74ABT244APW is sourced from the original manufacturer or authorized distributors?
All SN74ABT244APW 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 SN74ABT244APW meets industry standards.
7.What is the process for return or replacement of SN74ABT244APW?
All SN74ABT244APW units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT244APW, 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 SN74ABT244APW part is unused and in its original packaging.
Return procedure for SN74ABT244APW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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