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Texas Instruments SN74ABT16827DLG4
- Part No.:
- SN74ABT16827DLG4
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT16827DLG4.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,591
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Product details
Overview
SN74ABT16827DLG4 from Texas Instruments is a noninverting 20-bit buffer/driver IC with dual 10-bit sections, 3-state outputs, ±32-mA high-drive capability, 5-V supply operation, and -40°C to 85°C temperature range - used in high-speed bus interface and memory address/data buffering applications.
For engineers reviewing the SN74ABT16827DLG4 datasheet, SN74ABT16827DLG4 pinout, SN74ABT16827DLG4 application, or SN74ABT16827DLG4 equivalent, key selection criteria include output drive strength (–32 mA IOH / 64 mA IOL), guaranteed 3-state behavior during power-up/down, flow-through pin architecture for PCB layout optimization, and DL-package thermal impedance of 74°C/W.
Technical Context
This device implements two independent 10-bit noninverting buffers, each controlled by two active-low output-enable inputs (e.g., 1OE1 and 1OE2); both must be low for that section's Y outputs to be active. Outputs enter high-impedance state if either OE input is high.
It features EPIC-IIB BiCMOS design for low power dissipation, distributed VCC/GND pinning to suppress switching noise, and inherent power-up/power-down high-impedance behavior when VCC is between 0 and 2.1 V - eliminating need for external reset sequencing in many systems.
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 logic rails and noise margin compliance. |
| Output Drive | –32 mA IOH / 64 mA IOL - supports heavy capacitive loads and fan-out to multiple downstream inputs without signal degradation. |
| Propagation Delay | 1 ns (min) to 3.4 ns (max) at 5 V - enables reliable operation in sub-10-ns timing-critical data paths. |
| Input Thresholds | VIL = 0.8 V max, VIH = 2.0 V min - provides robust noise immunity against TTL-level input signals. |
| Thermal Impedance | θJA = 74°C/W (DL package) - defines maximum junction-to-ambient temperature rise under steady-state power dissipation. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and communications equipment. |
| Package Type | 56-pin SSOP (DL) - surface-mount, shrink small-outline package with 0.5-mm lead pitch and flow-through pinout. |
Pinout & Package
SN74ABT16827DLG4 is housed in a 56-pin Shrink Small-Outline Package (SSOP), designated DL, with 0.5-mm lead pitch, 300-mil body width, and flow-through pin arrangement optimized for minimal trace crossovers on dense PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE1, 1OE2, 2OE1, 2OE2 | Section Output Enable (active-low) | Both enables per 10-bit section must be low to activate outputs; any high forces high-impedance state - enabling independent bus arbitration. |
| 1A1–1A10, 2A1–2A10 | Data Inputs | Noninverting inputs for respective 10-bit sections; accept standard TTL/CMOS logic levels with ±1 µA leakage. |
| 1Y1–1Y10, 2Y1–2Y10 | Buffered Outputs | 3-state, high-drive outputs with VOL ≤ 0.55 V at 64 mA - suitable for driving stubbed buses or multiple loads. |
| VCC (Pins 7, 22, 36, 48, 56) | Power Supply | Distributed VCC pins reduce simultaneous switching noise and improve power integrity across wide bus widths. |
| GND (Pins 4, 11, 18, 29, 33, 40, 46, 53) | Ground Reference | Eight dedicated GND pins provide low-inductance return paths and minimize ground bounce (VOLP < 1 V typical). |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input and output pins arranged on opposite sides of package - eliminates layer jumps and reduces signal crosstalk in high-density routing. |
| Power-up/down high-Z | Guaranteed high-impedance state when VCC is below 2.1 V - prevents bus contention during system power sequencing without external circuitry. |
| Latch-up immunity | Exceeds 500 mA per JEDEC JESD-17 - ensures robustness against transient overcurrent events in noisy industrial environments. |
| Low ground bounce | VOLP < 1 V at VCC = 5 V, TA = 25°C - maintains signal integrity during fast switching of all 20 outputs simultaneously. |
| EPIC-IIB BiCMOS process | Combines bipolar speed and CMOS low static power - achieves 3.4 ns max propagation delay with only 2 mA ICC in disabled state. |
Applications
| Memory Address Buffering | Backplane Data Bus Interface |
|---|---|
|
Use Scenario: Driving 20-bit address lines from a microcontroller to SRAM or Flash memory in an industrial PLC. IC Role / Device Role / Timing Role: Noninverting buffer providing level translation, fan-out expansion, and bus isolation between controller and memory subsystem. Use Value: Ensures clean, low-skew address propagation with 3.4 ns max tPHL/tPLH, preventing memory access timing violations under full load. |
Use Scenario: Interfacing a CPU local bus to a 20-bit parallel backplane in test equipment or modular instrumentation. IC Role / Device Role / Timing Role: Bidirectional-capable 3-state driver enabling shared bus arbitration between multiple masters and slaves. Use Value: High-drive outputs (64 mA IOL) maintain signal integrity across long traces and multiple connectors; distributed VCC/GND minimizes switching noise coupling. |
| High-Speed Peripheral Expansion | Legacy ISA Bus Repeater |
|
Use Scenario: Extending a 20-bit peripheral interface (e.g., FPGA GPIO bank) to external daughterboards in medical imaging hardware. IC Role / Device Role / Timing Role: Signal repeater with configurable 10-bit section enables partial enablement for dynamic bandwidth management. Use Value: Independent OE control per 10-bit block allows selective activation - reducing dynamic power and EMI during partial bus usage. |
Use Scenario: Replacing aging 74-series buffers in retro-computing or industrial PC-compatible systems requiring ISA bus signal regeneration. IC Role / Device Role / Timing Role: Pin-compatible upgrade path for legacy 20-bit bus drivers with improved speed, drive, and power efficiency. Use Value: 3.4 ns max propagation delay and –32 mA/64 mA drive exceed original 74F/74AS performance while maintaining identical logic function and pinout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 20-bit noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT162244DL | Octal (8-bit) ×2 configuration; same ABT family, 5-V operation, but lower channel count (16 total outputs). | Requires two devices for 20-bit coverage; lacks integrated dual-10-bit grouping and shared OE logic. | Select when board space permits discrete 8-bit buffering or when staggered enable timing is required. |
| SN74LVC16244ADGGR | 3.3-V only operation; LVCMOS logic thresholds; lower drive (–24 mA / 24 mA); different pinout. | Not compatible with 5-V systems; requires level-shifting for mixed-voltage designs; unsuitable for legacy 5-V bus interfaces. | Choose only for new 3.3-V designs where lower power and smaller package (TSSOP-48) outweigh voltage incompatibility. |
Compared with SN74ABT162244DL and SN74LVC16244ADGGR, the SN74ABT16827DLG4 uniquely delivers native 20-bit grouping with dual independent 10-bit enables, 5-V tolerance, and industry-leading 64-mA sink drive - making it the sole option for single-chip 20-bit 5-V bus buffering with guaranteed power-cycle safety.
Availability
SN74ABT16827DLG4 is available at Aetrix Electronics and suitable for industrial control systems, test instrumentation, and legacy computing platforms requiring stable component supply, long-term lifecycle support, and guaranteed 5-V bus interface compatibility.
Supply support for SN74ABT16827DLG4 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 logic solutions, with decades of heritage in high-reliability logic families and industrial-grade components.
The SN74ABT16827DLG4 belongs to TI's Widebus™ ABT logic family, engineered specifically for high-speed, high-drive 5-V bus interfacing in industrial, telecom, and computing infrastructure where signal integrity and power-cycle robustness are critical.
FAQ
What is the operating voltage range for SN74ABT16827DLG4?
The SN74ABT16827DLG4 operates over a supply voltage range of 4.5 V to 5.5 V. This range ensures compatibility with standard 5-V TTL systems while maintaining noise margins and specified timing performance. Operation outside this range may result in undefined behavior or damage, as absolute maximum ratings cap VCC at 7 V.
Does SN74ABT16827DLG4 support hot insertion or live bus connection?
Yes, the SN74ABT16827DLG4 supports safe hot insertion due to its guaranteed high-impedance state when VCC is between 0 and 2.1 V, and its Ioff specification of ±100 µA at VCC = 0 V. These features prevent back-driving or contention on live buses during plug-in, provided OE inputs remain inactive until power stabilizes.
How many output-enable inputs does SN74ABT16827DLG4 have, and how do they function?
The SN74ABT16827DLG4 has four active-low output-enable inputs: 1OE1 and 1OE2 for the first 10-bit section, and 2OE1 and 2OE2 for the second. Both enables per section must be low for that section's outputs to be active; if either is high, all ten outputs in that section go to high-impedance - enabling fine-grained bus control without external logic.
What is the thermal performance of SN74ABT16827DLG4 in its DL package?
The SN74ABT16827DLG4 in the DL (SSOP-56) package has a junction-to-ambient thermal resistance (θJA) of 74°C/W under standard JEDEC test conditions. This value assumes a two-layer board with 1-in² copper pour; actual performance improves with enhanced PCB copper area or thermal vias beneath the exposed pad region.
Is SN74ABT16827DLG4 pin-compatible with earlier 74-series 20-bit buffers?
No, SN74ABT16827DLG4 is not pin-compatible with legacy 74F/74AS244 or 74ACT16244 devices. Its 56-pin DL package and flow-through pinout (e.g., inputs on one side, outputs on the other) differ fundamentally from 48-pin DIP or SOIC packages. However, its logic function and electrical behavior are direct upgrades for 5-V bus buffering applications.
SN74ABT16827DLG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- 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:
- 56-SSOP
SN74ABT16827DLG4 FAQ
1.How can I place an order for SN74ABT16827DLG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT16827DLG4 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 SN74ABT16827DLG4 reliable?
The price and inventory of SN74ABT16827DLG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT16827DLG4 is usually 5 days.
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SN74ABT16827DLG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT16827DLG4 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 SN74ABT16827DLG4?
For technical support, including SN74ABT16827DLG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT16827DLG4 requirements.
6.How does Aetrix verify that SN74ABT16827DLG4 is sourced from the original manufacturer or authorized distributors?
All SN74ABT16827DLG4 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 SN74ABT16827DLG4 meets industry standards.
7.What is the process for return or replacement of SN74ABT16827DLG4?
All SN74ABT16827DLG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16827DLG4, 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 SN74ABT16827DLG4 part is unused and in its original packaging.
Return procedure for SN74ABT16827DLG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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