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Texas Instruments SN74ABT827DWR
- Part No.:
- SN74ABT827DWR
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT827DWR.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,157
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Product details
Overview
SN74ABT827DWR from Texas Instruments is a 10-bit noninverting 3-state buffer/bus driver in SOIC-24 package, designed for high-speed wide-bus interfacing with −32-mA high-drive IOH and 64-mA IOL, operating across −40°C to 85°C, and used in industrial backplane and memory subsystem data path isolation.
For engineers reviewing the SN74ABT827DWR datasheet, SN74ABT827DWR pinout, SN74ABT827DWR application, or SN74ABT827DWR equivalent, key selection criteria include dual active-low OE control logic, flow-through pinout for PCB layout optimization, EPIC-II B BiCMOS process for low ground bounce (<1 V VOLP), and guaranteed high-impedance state during power-up/down (VCC < 2.1 V).
Technical Context
This device implements a dual-gated 3-state control architecture using two active-low enable inputs (OE1, OE2) feeding a 2-input AND gate - either high disables all ten outputs into high-Z. Its true-output logic (noninverting) and flow-through pin arrangement (A1–A10 on one side, Y1–Y10 on opposite) minimize trace crossovers in dense bus routing.
Based on Texas Instruments' EPIC-II B BiCMOS process, it achieves high drive strength while maintaining low power dissipation and latch-up immunity (>500 mA per JESD-17). The input transition rate limit (5 ns/V) and power-up ramp requirement (200 µs/V) ensure robust timing behavior in mixed-slew-rate systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage (VCC) | 4.5 V to 5.5 V - defines valid TTL-compatible operation range; outside this, output states are undefined or degraded. |
| Output Drive (IOH/IOL) | −32 mA / 64 mA - enables direct interface to heavy-loaded buses without external buffers, reducing component count. |
| Propagation Delay (tPLH/tPHL) | 1.1 ns (min) to 4.8 ns (max) at 5 V - supports >200 MHz bus toggle rates in point-to-point configurations. |
| Enable/Disable Time (tPZL/tPHZ) | 1.3 ns (min) to 6.9 ns (max) - ensures fast bus arbitration and clean signal gating in multiplexed data paths. |
| Input Clamp Current (IIK) | −18 mA - protects against negative transients up to −1.2 V at VI, supporting hot-swap and ESD robustness. |
| Thermal Resistance (θJA) | 81 °C/W (DW package) - determines maximum power dissipation (1.5 mA ICC typical) before thermal derating in standard FR-4 layouts. |
| Operating Temperature | −40°C to +85°C - qualified for commercial/industrial environments including factory automation and telecom line cards. |
Pinout & Package
SN74ABT827DWR uses a 24-pin SOIC (DW) package measuring 15.4 mm × 7.5 mm × 2.35 mm (max height), with gull-wing leads, RoHS-compliant NiPdAu finish, and MSL Level-1 rating (260°C reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 | OE1, OE2 | Active-low 3-state enable inputs; both must be low for output drive - enables priority-based bus arbitration when cascaded. |
| 2–11 | A1–A10 | Data inputs; flow-through layout aligns with Y1–Y10 on opposite side, minimizing layer transitions in PCB routing. |
| 14–23 | Y1–Y10 | True (noninverting) buffered outputs; each capable of sinking 64 mA or sourcing −32 mA into loads. |
| 12, 24 | GND, VCC | Power pins placed diagonally to reduce supply noise coupling; decoupling capacitor placement is optimized near Pin 12 and Pin 24. |
| 3, 4, 5, 6, 7, 8, 9, 10, 15, 16, 17, 18, 19, 20, 21, 22 | NC | No internal connection - unused pins; must remain unconnected to avoid parasitic coupling or mechanical stress. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input A1–A10 and output Y1–Y10 arranged on opposing sides - eliminates layer jumps and reduces trace length by up to 40% in bus layouts. |
| High-impedance during power sequencing | Guaranteed Hi-Z when VCC < 2.1 V - prevents bus contention during cold-start or brownout conditions without external circuitry. |
| Low ground bounce (VOLP) | <1 V at VCC = 5 V, TA = 25°C - maintains signal integrity in multi-driver systems where simultaneous switching noise is critical. |
| EPIC-II B BiCMOS process | Combines bipolar speed and CMOS density - delivers 64-mA drive with typical ICC of only 1.5 mA (enabled) and 80 µA (disabled). |
| Latch-up immunity | >500 mA per JEDEC JESD-17 - ensures survivability under transient overvoltage or ESD events in industrial environments. |
Applications
| Backplane Data Bus Isolation | Memory Subsystem Address Latching |
|---|---|
Use Scenario: Isolating CPU address/data lines from peripheral slots in modular industrial controllers. IC Role / Device Role / Timing Role: 10-bit bidirectional buffer enabling hot-plug-safe bus segmentation with zero-latency pass-through and controlled enable timing. Use Value: Prevents bus contention during card insertion/removal via guaranteed high-Z during VCC ramp; dual OE allows independent slot enable control. |
Use Scenario: Driving address lines to multiple SRAM banks in embedded instrumentation with shared bus architecture. IC Role / Device Role / Timing Role: Noninverting bus driver providing fanout gain and slew control for 10-bit address signals with matched propagation delay across channels. Use Value: Delivers 64-mA sink current to overcome capacitive loading of long traces and multiple inputs, maintaining setup/hold margins at 20-MHz clock rates. |
| Industrial PLC I/O Expansion Module | Digital Signal Processor (DSP) Memory Interface |
Use Scenario: Interfacing FPGA-configured I/O banks to legacy 5-V TTL peripherals in programmable logic controllers. IC Role / Device Role / Timing Role: Level-shifting and drive-strengthening buffer between 3.3-V FPGA I/O and 5-V industrial sensors/actuators. Use Value: Tolerates VI up to 7 V and provides 5-V compatible outputs - eliminates need for discrete level translators in mixed-voltage systems. |
Use Scenario: Buffering external program memory address lines for TI C6000-series DSPs operating in EMIF mode. IC Role / Device Role / Timing Role: Low-skew, high-drive bus driver ensuring deterministic timing between DSP core and off-chip Flash/SDRAM. Use Value: 1.1-ns min tPLH/tPHL and 1.3-ns min tPZL support tight timing budgets in high-bandwidth memory access cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit noninverting bus driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT244DW | Octal (8-bit), not 10-bit; identical DW package, same VCC/IO specs, but lacks A9/A10 and Y9/Y10 pins. | Suitable only where 8-bit bus width suffices; requires redesign if full 10-bit path is mandatory. | Select SN74ABT244DW only when system bus width is ≤8 bits and pin compatibility with existing 24-pin SOIC footprint is required. |
| SN74LVC8T245PW | 8-bit dual-supply translator (1.65–5.5 V), 32-mA drive, TSSOP-24; no BiCMOS, higher VOLP (~1.2 V), wider temp range (−40°C to 125°C). | Enables voltage translation (e.g., 3.3 V ↔ 5 V); unsuitable for pure 5-V high-drive applications due to lower IOL (24 mA). | Choose SN74LVC8T245PW only when level-shifting between disparate supply domains is needed - not as a drop-in replacement for SN74ABT827DWR. |
Compared with SN74ABT244DW and SN74LVC8T245PW, SN74ABT827DWR uniquely delivers 10-bit width, 64-mA sink capability, and sub-1-V ground bounce in a standard SOIC-24 - making it irreplaceable in legacy 5-V wide-bus systems requiring strict timing and drive compliance.
Availability
SN74ABT827DWR is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory subsystem expansion, and PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74ABT827DWR 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
SN74ABT827DWR belongs to the ABT (Advanced BiCMOS Technology) logic family, engineered for high-speed, high-drive 5-V TTL-compatible bus interfacing in mission-critical industrial control and computing infrastructure.
FAQ
What is the recommended pullup resistor value for OE pins on SN74ABT827DWR?
The minimum pullup resistor value for OE1/OE2 on SN74ABT827DWR is determined by the current-sinking capability of the driver controlling OE. Per the datasheet, OE should be tied to VCC through a pullup resistor to guarantee high-impedance state above 2.1 V; typical values range from 4.7 kΩ to 10 kΩ when driven by standard TTL or CMOS logic. SN74ABT827DWR itself does not source current into OE - the resistor must accommodate the driving device's IOL.
Does SN74ABT827DWR support hot-swap operation?
Yes, SN74ABT827DWR supports controlled hot-swap operation due to its guaranteed high-impedance state when VCC is below 2.1 V during power-up/down sequences. This prevents bus contention when inserting or removing boards in live backplanes. However, external current-limiting and sequencing circuits are still recommended for full hot-swap compliance per IEC 61000-4-2, as SN74ABT827DWR alone does not provide overcurrent protection.
Can SN74ABT827DWR drive a 50-pF load at 25 MHz?
Yes, SN74ABT827DWR is characterized for CL = 50 pF and delivers tPLH/tPHL ≤ 4.8 ns at 5 V, supporting reliable operation up to ~200 MHz in point-to-point configurations. At 25 MHz, timing margins are ample - setup/hold and propagation delays remain well within specification, provided trace impedance and termination follow standard 5-V TTL practices. SN74ABT827DWR's 64-mA IOL ensures fast edge rates into such loads.
What is the meaning of "NC" pins on SN74ABT827DWR?
"NC" (No Connection) pins on SN74ABT827DWR - specifically Pins 3, 4, 5, 6, 7, 8, 9, 10, 15, 16, 17, 18, 19, 20, 21, 22 - have no internal silicon connection. They must remain unconnected on the PCB to avoid mechanical stress, parasitic capacitance, or unintended coupling. Routing traces or placing vias on NC pads is discouraged; solder mask coverage is acceptable per TI's layout guidelines for SN74ABT827DWR.
Is SN74ABT827DWR pin-compatible with SN74ABT827DW?
Yes, SN74ABT827DWR and SN74ABT827DW share identical SOIC-24 (DW) package dimensions, pinout, and electrical specifications - differing only in packaging format (tape-and-reel vs. tube) and reel quantity (2000 vs. 25 units). Both use the same ABT827 marking, NIPDAU lead finish, and Level-1 MSL rating. SN74ABT827DWR is a direct form-fit-function replacement for SN74ABT827DW in automated assembly.
SN74ABT827DWR 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:
- 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
SN74ABT827DWR FAQ
1.How can I place an order for SN74ABT827DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT827DWR 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 SN74ABT827DWR reliable?
The price and inventory of SN74ABT827DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT827DWR is usually 5 days.
3.What payment methods are accepted for SN74ABT827DWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT827DWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT827DWR?
SN74ABT827DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT827DWR 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 SN74ABT827DWR?
For technical support, including SN74ABT827DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT827DWR requirements.
6.How does Aetrix verify that SN74ABT827DWR is sourced from the original manufacturer or authorized distributors?
All SN74ABT827DWR 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 SN74ABT827DWR meets industry standards.
7.What is the process for return or replacement of SN74ABT827DWR?
All SN74ABT827DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT827DWR, 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 SN74ABT827DWR part is unused and in its original packaging.
Return procedure for SN74ABT827DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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