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Texas Instruments SN74ABT244APWRG4
- Part No.:
- SN74ABT244APWRG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ABT244APWRG4.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,883
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Product details
Overview
SN74ABT244APWRG4 from Texas Instruments is an octal noninverting 3-state buffer/line driver in a 20-pin TSSOP package, operating at 4.5–5.5 V with ±32-mA high-drive outputs, 4.1-ns max propagation delay (tPHL), and −40°C to +85°C temperature range. It enables bidirectional bus interfacing in memory address and clock distribution systems.
For engineers reviewing the SN74ABT244APWRG4 datasheet, SN74ABT244APWRG4 pinout, SN74ABT244APWRG4 application, or SN74ABT244APWRG4 equivalent, this page delivers verified electrical specs, validated pin functions, real-world use cases in industrial bus systems, and two confirmed alternative parts with documented functional and thermal trade-offs.
Technical Context
This device implements two independent 4-bit noninverting buffers, each with dedicated active-low output-enable (OE) control. Its EPIC-IIB BiCMOS process delivers low ground bounce (<1 V VOLP) and latch-up immunity exceeding 500 mA per JEDEC JESD-17.
Each buffer passes A-input data to Y-outputs when OE is low; outputs enter high-impedance state when OE is high. Pull-up resistors on OE pins ensure safe high-Z behavior during power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - compatible with standard 5-V TTL and CMOS logic rails |
| IOL / IOH | 64 mA / −32 mA - drives heavy capacitive loads and multiple TTL inputs without buffering |
| tPHL / tPLH | ≤4.3 ns / ≤4.1 ns - supports >200-MHz bus toggle rates under CL = 50 pF |
| VIH / VIL | 2.0 V / 0.8 V - ensures robust noise margin against TTL-level signals |
| IOZL / IOZH | ±10 µA - guarantees minimal leakage in 3-state mode for low-power standby |
| θJA (PW) | 128°C/W - requires minimal PCB copper area for thermal management at full drive |
| ESD Rating | 2000 V HBM - withstands handling without external protection diodes |
Pinout & Package
TSSOP-20 (PW) package: 6.5 mm × 4.4 mm body, 0.65 mm pitch, 1.2 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Independent control of each 4-bit buffer group; tie to VCC via pull-up for power-up safety |
| 1A1–1A4, 2A1–2A4 | Data inputs | Noninverting input terminals for respective buffer sections |
| 1Y1–1Y4, 2Y1–2Y4 | 3-state outputs | High-drive buffered outputs; high-impedance when corresponding OE is high |
| GND (Pin 10) | Ground reference | Primary return path for all I/O and supply currents; must be low-inductance connection |
| VCC (Pin 20) | Power supply | 5-V supply rail; requires local 0.1-µF ceramic decoupling adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| High-Drive Outputs | −32-mA IOH / 64-mA IOL enables direct driving of 10+ TTL loads or 50-pF buses |
| Low Ground Bounce | VOLP < 1 V at VCC = 5 V ensures signal integrity during simultaneous switching |
| Latch-Up Immunity | Exceeds 500 mA per JEDEC JESD-17 - eliminates need for external current-limiting in harsh environments |
| BiCMOS Process | EPIC-IIB architecture reduces static power vs. pure bipolar while retaining speed |
| 3-State Control Logic | Dedicated OE pins per 4-bit section allow selective bus arbitration without data corruption |
Applications
| Memory Address Buffering | Industrial PLC Backplane Interface |
|---|---|
Use Scenario: Driving address lines from microcontroller to multiple SRAM or Flash devices on shared bus. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating CPU address outputs from parallel memory array loading. Use Value: 64-mA drive strength maintains signal rise time across 10-cm traces with 50-pF total load. | Use Scenario: Interfacing fieldbus controller to modular I/O racks with hot-swap capability. IC Role / Device Role / Timing Role: Bus transceiver enabling controlled data flow between master and slave modules during insertion/removal. Use Value: Independent OE pins permit staggered enable timing to prevent bus contention during rack reconfiguration. |
| Clock Distribution Network | Legacy ISA Bus Signal Extension |
Use Scenario: Fan-out of system clock to multiple peripheral controllers requiring synchronized timing. IC Role / Device Role / Timing Role: Low-skew, high-drive clock buffer with matched tPHL/tPLH ensuring deterministic edge alignment. Use Value: 4.1-ns max tPLH and <100-mV hysteresis minimize clock jitter accumulation across 8 destinations. | Use Scenario: Extending ISA bus signals (e.g., I/OCHRDY, MEMR) across backplane to expansion cards. IC Role / Device Role / Timing Role: Level-shifting and load-driving interface between motherboard and legacy add-in cards. Use Value: 5-V tolerant inputs and 64-mA outputs meet ISA specification requirements for signal integrity over 15-cm slots. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244APWR | 3.3-V only (1.65–3.6 V), lower drive (±24 mA), 3.7-ns tPHL, 1.2-V VIH threshold | Requires level translation for 5-V systems; unsuitable for legacy 5-V bus interfaces | Select when migrating to 3.3-V logic domains with lower power budgets and no 5-V compatibility requirement |
| SN74ABT240APWR | Inverting outputs, identical voltage range, drive, and timing specs | Used where signal polarity inversion is acceptable or required in bus protocol | Choose for designs needing inverted logic sense without changing board layout or thermal design |
Compared with SN74ABT244APWRG4, SN74LVC244APWR reduces power but sacrifices 5-V interoperability, while SN74ABT240APWR preserves full electrical compatibility except for output polarity-making it ideal for drop-in replacement where inversion is tolerable.
Availability
SN74ABT244APWRG4 is available at Aetrix Electronics and suitable for industrial automation, legacy bus extension, and memory subsystem design requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74ABT244APWRG4 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 delivering analog, embedded processing, and logic solutions with emphasis on reliability, performance, and broad application coverage.
The ABT logic family-including SN74ABT244APWRG4-is engineered for high-speed, high-drive 5-V bus interfacing in industrial, computing, and communications infrastructure where signal integrity and latch-up immunity are critical.
FAQ
What is the maximum operating temperature range for SN74ABT244APWRG4?
The SN74ABT244APWRG4 is characterized for operation from −40°C to +85°C, matching the commercial temperature grade of the SN74ABT244A series. This range supports deployment in industrial control cabinets and telecom line cards without forced cooling.
Does SN74ABT244APWRG4 require external pull-up resistors on its OE pins?
Yes - to guarantee high-impedance outputs during power-up or power-down, SN74ABT244APWRG4 OE pins must be tied to VCC through external pull-up resistors. The minimum resistance value depends on the driver's current-sinking capability, typically 4.7 kΩ for standard logic drivers.
Can SN74ABT244APWRG4 drive a 50-pF load at 200 MHz?
While SN74ABT244APWRG4 supports fast edge rates (tPHL ≤ 4.3 ns), sustained 200-MHz toggling into 50 pF exceeds its recommended switching frequency due to cumulative dynamic power and thermal limits. It is rated for reliable operation up to ~125 MHz under typical conditions with proper decoupling.
Is SN74ABT244APWRG4 pin-compatible with SN74ABT244APWR?
Yes - SN74ABT244APWRG4 and SN74ABT244APWR share identical TSSOP-20 (PW) packaging, pinout, and electrical specifications. The "G4" suffix denotes green (RoHS & no Sb/Br) material compliance, with no functional or mechanical differences affecting PCB layout.
What is the purpose of the EPIC-IIB BiCMOS process used in SN74ABT244APWRG4?
The EPIC-IIB BiCMOS process in SN74ABT244APWRG4 combines bipolar speed with CMOS low static power, achieving high drive strength (64 mA) and fast propagation (≤4.3 ns) while reducing quiescent current versus pure bipolar designs - critical for dense bus systems where heat dissipation is constrained.
SN74ABT244APWRG4 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:
- 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, 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
SN74ABT244APWRG4 FAQ
1.How can I place an order for SN74ABT244APWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT244APWRG4 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 SN74ABT244APWRG4 reliable?
The price and inventory of SN74ABT244APWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT244APWRG4 is usually 5 days.
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4.How is shipping managed for SN74ABT244APWRG4?
SN74ABT244APWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT244APWRG4 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 SN74ABT244APWRG4?
For technical support, including SN74ABT244APWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT244APWRG4 requirements.
6.How does Aetrix verify that SN74ABT244APWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74ABT244APWRG4 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 SN74ABT244APWRG4 meets industry standards.
7.What is the process for return or replacement of SN74ABT244APWRG4?
All SN74ABT244APWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT244APWRG4, 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 SN74ABT244APWRG4 part is unused and in its original packaging.
Return procedure for SN74ABT244APWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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