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Texas Instruments SN74ABT861DWRG4
- Part No.:
- SN74ABT861DWRG4
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT861DWRG4.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,072
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Product details
Overview
SN74ABT861DWRG4 from Texas Instruments is a 10-bit noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between A and B buses in industrial and embedded systems. It supports ±32-mA high-drive outputs, operates from 4.5 V to 5.5 V, features high-impedance state during power up/down (VCC < 2.1 V), and is qualified for –40°C to 85°C operation in SOIC-24 package.
For engineers reviewing the SN74ABT861DWRG4 datasheet, SN74ABT861DWRG4 pinout, SN74ABT861DWRG4 application, or SN74ABT861DWRG4 equivalent, key selection criteria include bidirectional 3-state control via OEAB/OEBA, latch-up immunity (>500 mA), ESD protection (>2000 V HBM), and compatibility with TTL-level logic interfaces in legacy bus architectures.
Technical Context
The SN74ABT861DWRG4 implements dual independent output-enable controls (OEAB and OEBA) to select direction: low on OEAB enables A→B transmission; low on OEBA enables B→A transmission. Both enables high isolate buses, while both low latches A = B. Its EPIC-IIB BiCMOS process delivers low power dissipation without sacrificing drive strength.
It guarantees rail-to-rail input compatibility (VI = 0 to VCC), supports hot-insertion via power-up/down high-impedance behavior, and meets JEDEC JESD-17 latch-up and MIL-STD-883 ESD standards. Propagation delays are tightly specified: tPLH/tPHL ≤ 5.3 ns (typ), tPZL/tPZH ≤ 7 ns (max) at VCC = 5 V, CL = 50 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures robust operation across noisy industrial rails and tolerance to 5-V system variation. |
| Output Drive | –32 mA IOH / +64 mA IOL - Drives heavy capacitive loads and multiple TTL inputs without external buffers. |
| Propagation Delay | ≤ 5.3 ns (tPLH/tPHL, typ) - Enables high-speed bus handshaking in real-time control and data acquisition. |
| Power-Up State | High-impedance below 2.1 V VCC - Prevents bus contention during power sequencing in multi-rail systems. |
| ESD Rating | > 2000 V HBM - Meets MIL-STD-883 Class 3A, supporting reliable handling in manufacturing and field service. |
| Latch-Up Immunity | > 500 mA per JEDEC JESD-17 - Withstands transient overcurrent events in industrial environments. |
| Operating Temperature | –40°C to +85°C - Qualified for extended temperature range in automotive body electronics and factory automation. |
Pinout & Package
SN74ABT861DWRG4 is housed in a 24-pin SOIC (DW) package with standard 0.300-inch body width and gull-wing leads. Pin spacing is 1.27 mm, compatible with IPC-7351B SOIC-24 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 23 | OEBA | Active-low enable for B→A data flow; must be pulled high via resistor when unused to ensure isolation above 2.1 V VCC. |
| 10, 13 | OEAB | Active-low enable for A→B data flow; independent control allows asymmetric bus arbitration and half-duplex protocols. |
| 2–11 | A1–A10 | Input/output port A - Bidirectional I/O pins with 3-state capability; internally isolated when OEAB and OEBA are high. |
| 14–22, 24 | B1–B10 | Input/output port B - Mirrored functionality to A-side; supports full 10-bit parallel bus bridging. |
| 12 | GND | Ground reference for all I/O and internal circuitry; requires low-inductance connection to minimize switching noise. |
| 24 | VCC | Positive supply input; decoupling capacitor (0.1 µF ceramic) required within 10 mm for stable high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Independent Dual Output Enables | OEAB and OEBA allow asymmetric bus control - e.g., A→B active while B→A disabled - enabling master/slave arbitration without external logic. |
| High-Drive Outputs | –32 mA / +64 mA drive strength supports direct interfacing to 10+ TTL loads or long PCB traces without signal degradation. |
| Power-Up/Down High-Z | Guaranteed high-impedance state when VCC is between 0 and 2.1 V prevents bus conflicts during power sequencing or brownout conditions. |
| BiCMOS EPIC-IIB Process | Combines bipolar speed and CMOS low static power - ICC disabled ≤ 250 µA, reducing system-level quiescent current in standby modes. |
| Robust ESD & Latch-Up | Exceeds 2000 V HBM and 500 mA latch-up per JEDEC standards - suitable for industrial backplanes and field-replaceable modules. |
Applications
| Industrial Backplane Interface | Legacy System Bus Extension |
|---|---|
|
Use Scenario: Bridging CPU local bus to peripheral expansion slots in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Bidirectional 10-bit transceiver managing address/data multiplexing between microcontroller and I/O modules. Use Value: Independent OEAB/OEBA controls enable precise timing of read/write strobes, eliminating need for external bus-governor logic. |
Use Scenario: Extending ISA or VMEbus segments in test equipment requiring signal integrity across 15 cm trace lengths. IC Role / Device Role / Timing Role: Level-shifting and driving transceiver that maintains TTL-compatible voltage thresholds and fast edge rates. Use Value: 64-mA sink current drives 50-pF net capacitance with <5.3 ns propagation delay, preserving setup/hold margins at 20-MHz bus rates. |
| Automotive Body Control Module | Medical Data Acquisition Interface |
|
Use Scenario: Isolating microcontroller GPIO banks from high-noise CAN/LIN subsystems in door module ECUs. IC Role / Device Role / Timing Role: Direction-controlled buffer preventing ground-loop coupling and enabling safe hot-swap of submodules. Use Value: Power-up high-Z behavior ensures no bus contention during ignition cycling; –40°C to +85°C rating matches under-hood thermal envelope. |
Use Scenario: Interfacing ADC/DAC FPGA fabric to analog front-end boards in portable ultrasound systems. IC Role / Device Role / Timing Role: Synchronized data path transceiver supporting burst-mode sensor data transfers with deterministic latency. Use Value: Matched tPLH/tPHL (≤5.3 ns typ) and tight skew (<0.5 ns) preserve timing correlation across 10-bit parallel samples. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT245DW | 8-bit, single-directional OE control (one enable pin), lower drive (–15/+64 mA), same SOIC-20 package. | Suitable for unidirectional or simpler arbitration schemes; lacks independent A↔B control logic. | Choose when bus protocol requires only one direction at a time and space-constrained layout favors smaller package. |
| SN74LVC8T245PW | 8-bit, dual-supply (1.65–5.5 V), lower drive (–24/+24 mA), TSSOP-24 package, 3.3-V optimized. | Better for mixed-voltage systems (e.g., 3.3-V MCU ↔ 5-V peripherals); not drop-in due to different voltage thresholds and timing. | Prefer when migrating from 5-V-only designs to dual-rail architectures or where lower static power is critical. |
Compared with SN74ABT245DW and SN74LVC8T245PW, the SN74ABT861DWRG4 uniquely provides 10-bit width, independent dual-OE control, and 5-V–optimized high-drive performance - making it irreplaceable in legacy 10-bit parallel bus extensions requiring precise directional arbitration.
Availability
SN74ABT861DWRG4 is available at Aetrix Electronics and suitable for industrial backplane interfaces, automotive body control modules, legacy system bus extensions, and medical data acquisition interfaces requiring stable component supply and long-term obsolescence management.
Supply support for SN74ABT861DWRG4 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 connectivity technologies, with decades of experience in high-reliability logic and interface solutions.
The ABT logic family - including SN74ABT861DWRG4 - was engineered for high-speed, high-drive 5-V TTL-compatible bus interfacing in industrial, automotive, and communications infrastructure applications.
FAQ
What is the function of OEAB and OEBA on the SN74ABT861DWRG4?
The SN74ABT861DWRG4 uses OEAB (pin 10/13) to enable data flow from A bus to B bus when low, and OEBA (pin 1/23) to enable B-to-A flow when low. Both high isolates both buses; both low latches A = B. This dual-control architecture eliminates external direction logic and supports flexible bus arbitration protocols in the SN74ABT861DWRG4.
Does the SN74ABT861DWRG4 support hot-swap or live insertion?
Yes - the SN74ABT861DWRG4 enters guaranteed high-impedance state when VCC is between 0 and 2.1 V, preventing bus contention during power ramp-up or brownout. For reliable hot-swap above 2.1 V, OEAB and OEBA must be tied high via pullup resistors; minimum values depend on driver sink capability, as specified in the SN74ABT861DWRG4 datasheet.
What is the maximum capacitive load the SN74ABT861DWRG4 can drive reliably?
The SN74ABT861DWRG4 is characterized with CL = 50 pF for timing specifications (e.g., tPLH ≤ 5.3 ns). Its ±32-mA/±64-mA drive strength supports heavier loads - verified up to 100 pF with acceptable rise/fall times - but propagation delay increases linearly with capacitance. Layout best practices (short traces, ground plane) are essential for maintaining timing integrity in the SN74ABT861DWRG4.
Is the SN74ABT861DWRG4 pin-compatible with other ABT-series transceivers?
No - the SN74ABT861DWRG4 is a 10-bit device in SOIC-24, whereas most ABT transceivers (e.g., SN74ABT245) are 8-bit in SOIC-20. Pin count, signal mapping (dual OE vs single OE), and bus width differ fundamentally. Direct replacement requires PCB redesign; functional alternatives must match 10-bit width and dual-OE topology to retain SN74ABT861DWRG4's arbitration capability.
What packaging and compliance information applies to the SN74ABT861DWRG4?
The SN74ABT861DWRG4 is supplied in SOIC-24 (DW) package, RoHS-compliant, with NiPdAu lead finish and MSL Level-1 (unlimited floor life). It ships in tubes of 25 units. Part marking is "ABT861", and the device is rated for –40°C to +85°C operation - consistent with industrial-grade requirements for the SN74ABT861DWRG4.
SN74ABT861DWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 10
- 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:
- 24-SOIC
SN74ABT861DWRG4 FAQ
1.How can I place an order for SN74ABT861DWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT861DWRG4 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 SN74ABT861DWRG4 reliable?
The price and inventory of SN74ABT861DWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT861DWRG4 is usually 5 days.
3.What payment methods are accepted for SN74ABT861DWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT861DWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT861DWRG4?
SN74ABT861DWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT861DWRG4 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 SN74ABT861DWRG4?
For technical support, including SN74ABT861DWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT861DWRG4 requirements.
6.How does Aetrix verify that SN74ABT861DWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74ABT861DWRG4 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 SN74ABT861DWRG4 meets industry standards.
7.What is the process for return or replacement of SN74ABT861DWRG4?
All SN74ABT861DWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT861DWRG4, 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 SN74ABT861DWRG4 part is unused and in its original packaging.
Return procedure for SN74ABT861DWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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