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Texas Instruments SN74ABT827NT
- Part No.:
- SN74ABT827NT
- Manufacturer:
- Texas Instruments
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74ABT827NT.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,764
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Product details
Overview
SN74ABT827NT from Texas Instruments is a 10-bit noninverting 3-state buffer/bus driver in a 24-pin plastic DIP package, delivering high-drive outputs (−32 mA IOH, 64 mA IOL), flow-through pinout for optimized PCB layout, and guaranteed high-impedance state during power-up/down (VCC < 2.1 V). It serves as a wide-bus interface for data paths carrying parity in industrial backplanes and memory subsystems.
For engineers reviewing the SN74ABT827NT datasheet, SN74ABT827NT pinout, SN74ABT827NT application, or SN74ABT827NT equivalent, key selection criteria include its BiCMOS EPIC-II™ architecture, 5-V operation with ±1 µA input leakage, 4.5–5.5 V supply range, and compatibility with TTL-level control inputs driving CMOS loads.
Technical Context
This device implements dual active-low 2-input AND logic for output-enable control (OE1 and OE2), ensuring all ten outputs enter high-impedance state if either enable is high. Its flow-through architecture places inputs on one side (pins 1–11, 13) and outputs on the opposite side (pins 14–24, 12), minimizing trace crossings.
The SN74ABT827NT uses EPIC-II™ BiCMOS design to achieve low ground bounce (<1 V VOLP at 5 V), latch-up immunity >500 mA per JESD-17, and rail-to-rail output swing (VOH ≥ 2.5 V at −24 mA, VOL ≤ 0.55 V at 64 mA) across −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL/CMOS systems and stable operation under rail tolerance. |
| Output Drive | −32 mA IOH / 64 mA IOL - supports heavy capacitive bus loading and fan-out to multiple CMOS inputs without signal degradation. |
| Propagation Delay | 1.1–4.8 ns (tPLH/tPHL at 5 V) - enables high-speed data transfer in wide parallel buses up to ~200 MHz effective throughput. |
| Input Leakage | ±1 µA at VCC or GND - minimizes static current draw and prevents unintended logic transitions in high-impedance control lines. |
| Power-Up State | Guaranteed high-Z below 2.1 V VCC - eliminates bus contention during system power sequencing without external circuitry. |
| Thermal Resistance | 67°C/W θJA (NT package) - allows sustained operation at full drive strength in ambient temperatures up to +85°C with minimal heatsinking. |
| ESD Rating | Exceeds JEDEC JESD17 latch-up threshold (>500 mA) - provides robustness against transient currents in industrial environments. |
Pinout & Package
SN74ABT827NT uses a 24-pin plastic dual-in-line package (PDIP, NT), 0.600-inch body width, with standard through-hole mounting and 0.100-inch pin pitch. Pin 1 index located at top-left corner with notch marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 | OE1, OE2 | Active-low output-enable inputs - both must be low for output assertion; OR logic behavior simplifies bus arbitration control. |
| 2–11, 14 | A1–A10 | Data inputs - true (noninverting) logic path; flow-through layout aligns inputs left-to-right matching physical bus routing. |
| 15–24, 12 | Y1–Y10 | Buffered outputs - high-drive capability supports stubbed or daisy-chained bus topologies with up to 10 pF load per line. |
| 23 | GND | Signal reference - dedicated ground pin adjacent to outputs reduces switching noise coupling into sensitive analog sections. |
| 24 | VCC | Power supply - placed opposite GND for balanced decoupling; requires local 0.1 µF ceramic capacitor per device. |
Key Features
| Feature | Design Value |
|---|---|
| EPIC-II™ BiCMOS Process | Reduces dynamic power by >40% vs. standard bipolar TTL while retaining drive strength and speed. |
| Flow-Through Architecture | Enables straight-layer PCB routing with no layer jumps or vias between input and output banks - cuts layout time by ~30%. |
| High-Impedance Power Sequencing | Automatically enters Z-state when VCC < 2.1 V - eliminates need for external power-good monitoring or reset hold-off circuits. |
| Output Ground Bounce Control | VOLP < 1 V at 5 V/25°C - prevents false logic transitions on shared ground planes in multi-device bus systems. |
| TTL-Compatible Inputs | VIH = 2.0 V, VIL = 0.8 V - interoperates directly with legacy 5-V microcontrollers, FPGAs, and ASICs without level-shifting. |
Applications
| Industrial Backplane Interface | Memory Subsystem Buffer |
|---|---|
Use Scenario: Interfacing a 10-bit address/data bus between CPU module and peripheral cards in modular PLC chassis. IC Role / Device Role / Timing Role: Bidirectional bus driver isolating modules during hot-swap events while maintaining signal integrity across 15 cm traces. Use Value: High-drive outputs ensure clean edges at 20 MHz clock rates; flow-through pinout reduces crosstalk-induced setup/hold violations by >15%. | Use Scenario: Driving SRAM or Flash memory data bus in embedded controller with 8–10 parallel devices. IC Role / Device Role / Timing Role: Unidirectional data buffer enabling simultaneous write to multiple memory chips without bus contention. Use Value: Guaranteed high-Z during power ramp prevents memory corruption during cold start; 64-mA sink current handles worst-case bus capacitance of 80 pF. |
| Test Equipment Data Acquisition | Legacy System Bus Extender |
Use Scenario: Capturing parallel sensor data from 10-channel ADC array into FPGA-based acquisition unit. IC Role / Device Role / Timing Role: Signal conditioner converting noisy analog-front-end outputs to clean digital levels before sampling. Use Value: Low ground bounce (<1 V) prevents measurement offset errors; ±1 µA input leakage avoids bias current accumulation on high-impedance sensor lines. | Use Scenario: Extending ISA or VMEbus signals between motherboard and add-on card in retro-computing or avionics retrofit. IC Role / Device Role / Timing Role: Level translator and bus repeater restoring signal amplitude and timing margins degraded over long traces. Use Value: 4.5–5.5 V operating range tolerates aging power supplies; latch-up immunity >500 mA withstands ESD events common in field maintenance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit bus driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT244N | Octal (8-bit), not 10-bit; identical EPIC-II™ BiCMOS process, same drive strength and timing. | Suitable only where bus width is ≤8 bits; requires two devices for 10-bit coverage, increasing board area and supply current. | Select SN74ABT244N only when consolidating multiple 8-bit paths or replacing legacy octal drivers with minimal redesign. |
| SN74LVC8T245PW | 8-bit dual-supply transceiver (1.65–5.5 V), lower drive (−24/24 mA), TSSOP-24 package. | Supports voltage translation but lacks 10-bit width and high-drive capability; unsuitable for parity-carrying wide buses. | Choose SN74LVC8T245PW only for mixed-voltage 8-bit interfaces requiring level shifting, not for SN74ABT827NT's native 5-V, 10-bit, high-drive role. |
Compared with SN74ABT244N and SN74LVC8T245PW, the SN74ABT827NT uniquely delivers 10-bit width, 64-mA sink drive, and guaranteed power-up high-Z in a through-hole DIP-making it irreplaceable for legacy 5-V industrial backplanes requiring exact pin count and mechanical fit.
Availability
SN74ABT827NT is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory subsystem buffering, test equipment data acquisition, and legacy system bus extension requiring stable component supply and long-term obsolescence management.
Supply support for SN74ABT827NT 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 SN74ABT827NT belongs to TI's ABT logic family-designed specifically for high-speed, high-drive 5-V bus interfacing in mission-critical industrial and military systems where reliability, timing predictability, and power sequencing safety are mandatory.
FAQ
What is the maximum output current rating for SN74ABT827NT?
The SN74ABT827NT supports −32 mA high-level output current (IOH) and 64 mA low-level output current (IOL) under recommended operating conditions. These values are specified at VCC = 4.5 V to 5.5 V and ensure reliable drive into typical CMOS bus loads without exceeding thermal limits in the NT package.
Does SN74ABT827NT require external pull-up resistors on OE pins?
Yes - to guarantee high-impedance state above VCC = 2.1 V, OE1 and OE2 must be tied to VCC via pull-up resistors. The minimum resistor value depends on the driver's current-sinking capability; TI recommends ≤10 kΩ for robust noise immunity while maintaining fast disable timing in the SN74ABT827NT.
Can SN74ABT827NT operate with a 3.3-V supply?
No - the SN74ABT827NT is specified only for 4.5 V to 5.5 V operation. Its EPIC-II™ BiCMOS architecture and input thresholds (VIH = 2.0 V, VIL = 0.8 V) are optimized for 5-V TTL compatibility. Using 3.3 V risks undefined logic states, reduced noise margin, and failure to meet output drive specifications.
What is the thermal resistance (θJA) of the SN74ABT827NT package?
The SN74ABT827NT in the NT (plastic DIP) package has a junction-to-ambient thermal resistance (θJA) of 67°C/W, as measured per JEDEC standards. This value enables continuous operation at full output drive (64 mA per pin) in still-air environments up to +85°C ambient, assuming standard 2-layer PCB with adequate copper pour.
How does the flow-through architecture of SN74ABT827NT improve PCB layout?
The SN74ABT827NT places all 10 inputs (A1–A10) on the left side (pins 1–11, 13) and all 10 outputs (Y1–Y10) on the right side (pins 14–24, 12), enabling direct horizontal trace routing without layer changes or vias. This reduces parasitic inductance, minimizes crosstalk, and accelerates layout completion for dense backplane designs.
SN74ABT827NT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- Through Hole
- Supplier Device Package:
- 24-PDIP
SN74ABT827NT FAQ
1.How can I place an order for SN74ABT827NT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT827NT 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 SN74ABT827NT reliable?
The price and inventory of SN74ABT827NT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT827NT is usually 5 days.
3.What payment methods are accepted for SN74ABT827NT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT827NT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT827NT?
SN74ABT827NT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT827NT 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 SN74ABT827NT?
For technical support, including SN74ABT827NT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT827NT requirements.
6.How does Aetrix verify that SN74ABT827NT is sourced from the original manufacturer or authorized distributors?
All SN74ABT827NT 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 SN74ABT827NT meets industry standards.
7.What is the process for return or replacement of SN74ABT827NT?
All SN74ABT827NT units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT827NT, 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 SN74ABT827NT part is unused and in its original packaging.
Return procedure for SN74ABT827NT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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