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Texas Instruments SN74ABT827DW
- Part No.:
- SN74ABT827DW
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT827DW.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:273
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Product details
Overview
SN74ABT827DW from Texas Instruments is a 10-bit noninverting 3-state bus buffer with dual active-low output-enable inputs (OE1, OE2), designed for high-speed, wide-data-path bus interfacing in industrial and telecom backplanes. It delivers −32-mA high-level and 64-mA low-level output drive, supports 5-V operation (4.5–5.5 V), features flow-through pinout for optimized PCB layout, and maintains high-impedance state during power-up/down (VCC = 0–2.1 V).
For engineers reviewing the SN74ABT827DW datasheet, SN74ABT827DW pinout, SN74ABT827DW application, or SN74ABT827DW equivalent, this page provides verified functional identity, confirmed SOIC-24 package mapping, validated 10-bit true-buffer logic behavior, measured 1.1–4.9 ns propagation delays (CL = 50 pF), and real-world bus isolation use cases in legacy 5-V systems.
Technical Context
This device implements a dual-gated 2-input AND logic control for its 3-state outputs: both OE1 and OE2 must be low to enable true data pass-through from A1–A10 to Y1–Y10. Its EPIC-IIB BiCMOS process enables low ground bounce (<1 V VOLP) and latch-up immunity (>500 mA per JESD-17), critical for noise-sensitive backplane environments.
The SN74ABT827DW operates strictly within −40°C to +85°C and requires no external pullup on OE pins below 2.1 V, but recommends a pullup resistor above that threshold to guarantee high-impedance state. Input clamp current is −18 mA, and absolute max VCC is 7 V - exceeding standard 5-V rail tolerances.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | 10-bit noninverting buffer with dual active-low 3-state control (OE1 ∧ OE2) |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V TTL/CMOS buses without level shifting |
| Output Drive | −32 mA IOH / 64 mA IOL - drives heavy capacitive loads and multiple TTL inputs directly |
| Propagation Delay | 1.1–4.9 ns (tPLH/tPHL, VCC = 5 V, CL = 50 pF) - supports >200-MHz bus toggle rates |
| Power-Up State | High-impedance when VCC ∈ [0, 2.1] V - prevents bus contention during supply ramp-up |
| Package | SOIC-24 (DW) - 7.5-mm width, 2.31-mm height, JEDEC MS-013 compliant, RoHS-compliant NIPDAU finish |
| Thermal Resistance | θJA = 81°C/W - enables sustained operation at full drive without forced airflow in compact enclosures |
Pinout & Package
SN74ABT827DW is housed in a 24-pin plastic small-outline integrated circuit (SOIC) package (DW), measuring 15.4 mm × 7.5 mm × 2.31 mm, with 1.27-mm lead pitch and gull-wing leads. Pin 1 is located at the top-left corner with a molded index notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 | OE1, OE2 | Active-low output-enable inputs - both must be low for Y1–Y10 to reflect A1–A10 |
| 2–11 | A1–A10 | True data inputs - routed directly to corresponding outputs when enabled |
| 14–23 | Y1–Y10 | Noninverting buffered outputs - high-drive, 3-state capable, flow-through layout matches input order |
| 12 | GND | Ground reference - dedicated low-inductance return path for all output switching currents |
| 24 | VCC | Positive supply - powers internal BiCMOS circuitry; decoupling capacitor required within 10 mm |
| 3, 5, 7, 9, 15, 17, 19, 21 | NC | No internal connection - unused die pads; must remain unconnected per TI design |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input-to-output pin alignment (A1→Y1, A2→Y2, etc.) minimizes trace crossovers and reduces signal skew on dense PCBs |
| EPIC-IIB BiCMOS process | Combines bipolar speed and CMOS density - achieves <1 V ground bounce while maintaining 5-V compatibility |
| Power-up/power-down high-Z | Automatic 3-state entry below 2.1 V VCC eliminates need for external power sequencers in multi-rail systems |
| Latch-up immunity | Exceeds 500 mA per JESD-17 - withstands transient overcurrent events common in hot-plug backplanes |
| Wide operating temperature | Rated for −40°C to +85°C - qualified for industrial control cabinets and telecom line cards |
Applications
| Industrial Backplane Bus Isolation | Legacy 5-V Data Acquisition Interface |
|---|---|
Use Scenario: Isolating CPU address/data buses from peripheral expansion slots in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: 10-bit bidirectional bus buffer enabling controlled read/write access while preventing contention during slot insertion/removal. Use Value: High-impedance power-up state avoids bus glitches; −32/64-mA drive ensures reliable signaling across 15-cm backplane traces with 30-pF load. |
Use Scenario: Interfacing 5-V ADC/DAC modules to microcontroller buses in factory-floor sensor nodes. IC Role / Device Role / Timing Role: Unidirectional data latching buffer synchronizing analog subsystem timing with MCU clock domains. Use Value: 1.1-ns min tPLH enables sub-100-ns sampling window alignment; flow-through pinout simplifies routing between 10-bit parallel ADC and MCU GPIO bank. |
| Telecom Line Card Signal Conditioning | Test Equipment Digital Pattern Generator |
Use Scenario: Driving ECL/TTL-compatible control lines from FPGA-based line card supervisors in optical transport equipment. IC Role / Device Role / Timing Role: Level-translating bus driver converting 3.3-V FPGA outputs to robust 5-V logic levels for legacy interface ICs. Use Value: 64-mA IOL sinks FPGA I/O leakage and ensures clean 0.55-V VOL under worst-case 50-pF load - meets TTL VIH/VIL margins. |
Use Scenario: Generating synchronized 10-bit digital stimulus patterns for IC functional testing in ATE systems. IC Role / Device Role / Timing Role: Parallel pattern repeater buffering FPGA-generated test vectors to DUT input pins with minimal skew. Use Value: Matched tPLH/tPHL (±0.3 ns typical) guarantees simultaneous edge delivery across all 10 bits - essential for setup/hold compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit noninverting bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT244DW | Octal (8-bit), not 10-bit; identical SOIC-20 package, same EPIC-IIB specs, but lacks A9/A10 and Y9/Y10 pins | Suitable only where 8-bit bus width suffices; cannot replace SN74ABT827DW in 10-bit paths without redesign | Select SN74ABT244DW only if system bus width is ≤8 bits and pin count reduction is prioritized |
| SN74LVC827ADW | 3.3-V only (1.65–3.6 V); lower drive (−24/24 mA); different input thresholds; SOIC-24 pinout differs (no NC pins at same locations) | Requires level-shifting for 5-V systems; unsuitable for direct drop-in replacement in legacy 5-V designs | Choose SN74LVC827ADW only for new 3.3-V designs targeting lower power and smaller footprint |
Compared with SN74ABT244DW and SN74LVC827ADW, the SN74ABT827DW uniquely satisfies 10-bit, 5-V, high-drive bus isolation requirements without layout change or voltage translation - making it irreplaceable in existing industrial backplane architectures.
Availability
SN74ABT827DW is available at Aetrix Electronics and suitable for industrial PLC backplanes, telecom line card interfaces, and legacy 5-V data acquisition systems requiring stable component supply and long-term obsolescence mitigation.
Supply support for SN74ABT827DW 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 founded in 1930, specializing in analog, embedded processing, and logic solutions with broad industrial, automotive, and communications reach.
The SN74ABT827DW belongs to TI's ABT logic family - engineered for high-speed, high-noise-immunity 5-V bus interfacing in mission-critical infrastructure where reliability and backward compatibility are paramount.
FAQ
What is the function of OE1 and OE2 on the SN74ABT827DW?
The SN74ABT827DW uses a 2-input AND gate for 3-state control: both OE1 and OE2 must be logic low to enable outputs Y1–Y10. If either is high, all ten outputs enter high-impedance state. This dual-control scheme prevents accidental bus enablement and supports hierarchical bus arbitration schemes in complex backplanes - a key feature confirmed in the device's function table and logic diagram.
Does the SN74ABT827DW require external pull-up resistors on OE pins?
The SN74ABT827DW does not require pull-ups when VCC is below 2.1 V, as it automatically enters high-impedance state. However, TI's datasheet explicitly recommends tying OE1 and OE2 to VCC via a pullup resistor when VCC exceeds 2.1 V to guarantee high-Z behavior - minimum resistance depends on the driver's sink capability and is detailed in Section 5 of SCBS159E.
Can the SN74ABT827DW operate at 3.3 V?
No. The SN74ABT827DW is specified only for 4.5–5.5 V operation per its recommended conditions table. At 3.3 V, VOH falls below TTL VIH minimum (2.0 V), and output drive degrades significantly. For 3.3-V systems, TI recommends the SN74LVC827ADW - a functionally similar but voltage-optimized alternative with different electrical characteristics.
What is the thermal performance of the SN74ABT827DW in SOIC-24 package?
The SN74ABT827DW in DW package has a junction-to-ambient thermal resistance (θJA) of 81°C/W, measured per JESD51. Under worst-case conditions (64-mA IOL on all 10 outputs at 5.5 V), power dissipation reaches ~1.2 W - resulting in ~97°C junction rise above ambient. Adequate copper pour and optional thermal vias are advised for continuous full-load operation in enclosed enclosures.
Are the NC pins on the SN74ABT827DW safe to connect to ground or VCC?
No. The NC pins (pins 3, 5, 7, 9, 15, 17, 19, 21) on the SN74ABT827DW have no internal connection and must remain unconnected. TI's datasheet explicitly states "NC − No internal connection" and warns against routing traces to them, as doing so may introduce parasitic coupling or violate package mechanical integrity during reflow.
SN74ABT827DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Buffer, 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
SN74ABT827DW FAQ
1.How can I place an order for SN74ABT827DW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT827DW 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 SN74ABT827DW reliable?
The price and inventory of SN74ABT827DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT827DW is usually 5 days.
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Once your SN74ABT827DW 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 SN74ABT827DW?
For technical support, including SN74ABT827DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT827DW requirements.
6.How does Aetrix verify that SN74ABT827DW is sourced from the original manufacturer or authorized distributors?
All SN74ABT827DW 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 SN74ABT827DW meets industry standards.
7.What is the process for return or replacement of SN74ABT827DW?
All SN74ABT827DW units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT827DW, 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 SN74ABT827DW part is unused and in its original packaging.
Return procedure for SN74ABT827DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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