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Texas Instruments SN74ABT162827DGGR
- Part No.:
- SN74ABT162827DGGR
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SN74ABT162827DGGR.pdf
- Description:
- BUS DRIVER, ABT SERIES, 10-BIT6
- Quantity:
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- Shipping:
Inventory:1,000
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Product details
Overview
SN74ABT162827DGGR from Texas Instruments is a noninverting 20-bit buffer IC composed of two independent 10-bit buffers, each with dual output-enable inputs (1OE1/1OE2 and 2OE1/2OE2), rated for 4.5 V–5.5 V supply, ±12 mA drive strength, and 3.9 ns typical propagation delay at 5 V. It serves as a high-speed bus interface buffer in backplane and memory subsystem applications.
For engineers reviewing the SN74ABT162827DGGR datasheet, SN74ABT162827DGGR pinout, SN74ABT162827DGGR application, or SN74ABT162827DGGR equivalent, key selection considerations include its dual-OE logic architecture, integrated 25-Ω series output resistors, flow-through pinout, distributed VCC/GND layout, and -40°C to 85°C industrial temperature rating.
Technical Context
This device implements a dual 10-bit noninverting buffer topology where each 10-bit section requires both OE inputs low to enable outputs; either OE high forces all ten Y outputs into high-impedance state. Its EPIC-IIB BiCMOS process enables low power dissipation while maintaining TTL-compatible input thresholds and 5-V operation.
The architecture features distributed power/ground pins across the 56-pin TSSOP (DGG) package to suppress switching noise, and a flow-through pin arrangement-inputs on one side, outputs on the opposite-that simplifies PCB routing and minimizes trace skew in parallel bus 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 and ABT logic families. |
| Output Drive | ±12 mA - supports direct interfacing to multiple TTL loads without external buffering. |
| Propagation Delay | 3.9 ns max (tPLH/tPHL) - enables reliable operation in high-speed data buses up to ~250 MHz. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - guarantees robust noise margin against TTL-level signals. |
| Output Series Resistor | 25 Ω integrated - eliminates need for external termination resistors and reduces overshoot/undershoot. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded and communications equipment. |
| Input/Output Capacitance | Ci = 3.5 pF, Co = 8 pF - minimizes capacitive loading on driving sources and downstream receivers. |
Pinout & Package
The SN74ABT162827DGGR is housed in a 56-pin Thin Shrink Small-Outline Package (TSSOP-DGG), 13.9 mm × 7.9 mm body, 0.5 mm pitch, JEDEC MO-153 compliant, with exposed thermal pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE1, 1OE2, 2OE1, 2OE2 | Dual Output Enable Inputs (active-low) | Both OE inputs per 10-bit section must be low to enable corresponding Y outputs; either high disables all ten outputs to high-Z. |
| 1A1–1A10, 2A1–2A10 | Data Inputs | Noninverting inputs for respective 10-bit buffer sections; accept standard TTL logic levels. |
| 1Y1–1Y10, 2Y1–2Y10 | Buffered Outputs | Source/sink up to ±12 mA with built-in 25-Ω series resistance for controlled edge rates. |
| VCC (Pins 7, 26, 39, 50) | Power Supply | Distributed VCC pins reduce simultaneous switching noise and improve power integrity across wide bus. |
| GND (Pins 4, 11, 18, 29, 35, 42, 49) | Ground Reference | Seven dedicated GND pins provide low-inductance return paths and minimize ground bounce (VOLP < 1 V). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω output series resistors | Eliminates need for external termination components, reducing BOM count and PCB area in high-speed bus designs. |
| Flow-through pin architecture | Inputs and outputs are arranged on opposite sides of the package, enabling straight-line PCB trace routing and minimizing signal skew. |
| Distributed VCC and GND pins | Four VCC and seven GND pins suppress simultaneous switching noise and maintain stable reference for all 20 outputs. |
| EPIC-IIB BiCMOS process | Delivers TTL-compatible performance with significantly lower dynamic power versus standard bipolar ABT technology. |
| Latch-up immunity | Exceeds 500 mA per JEDEC JESD-17 - ensures robustness in noisy industrial environments with transient coupling. |
Applications
| Backplane Data Buffering | Memory Subsystem Interface |
|---|---|
Use Scenario: Isolating and driving parallel address/data lines between CPU and peripheral cards in modular rack systems. IC Role / Device Role / Timing Role: Noninverting 20-bit buffer providing level translation, fanout expansion, and noise isolation between hot-swappable modules. Use Value: Dual-OE control allows independent gating of two 10-bit channels during card insertion/removal, preventing bus contention. | Use Scenario: Interfacing microprocessor address/data buses to SRAM or Flash memory arrays with high capacitive loading. IC Role / Device Role / Timing Role: Bus driver strengthening signal integrity across long traces and multiple memory devices. Use Value: 3.9 ns max propagation delay and 25-Ω series resistors ensure clean edges and meet setup/hold timing margins for 15–20 ns memory access cycles. |
| Industrial PLC I/O Expansion | Test Equipment Signal Conditioning |
Use Scenario: Expanding digital I/O capacity in programmable logic controllers handling sensor inputs and actuator outputs. IC Role / Device Role / Timing Role: Bidirectional buffer (with external direction control) managing data flow between controller core and isolated I/O banks. Use Value: High-impedance disable state prevents back-driving during configuration changes; latch-up immunity withstands field-induced transients. | Use Scenario: Driving multiple DUT inputs simultaneously in automated test equipment with precise timing alignment. IC Role / Device Role / Timing Role: Synchronized 20-bit signal repeater ensuring matched propagation delay across all channels. Use Value: Flow-through pinout and uniform tPLH/tPHL (1–4.1 ns) minimize inter-channel skew below 3 ns, critical for parallel test vector accuracy. |
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 |
|---|---|---|---|
| SN74ABT16244DGGR | Octal (8-bit) dual-output-enable buffer; 4 channels × 2 bits; no integrated 25-Ω resistors. | Lower channel count; requires external termination; suited for narrower buses or modular scaling. | Select when 20-bit width is unnecessary and board space allows discrete resistor placement. |
| SN74LVC16244ADGGR | 16-bit LVC-family buffer; 3.3-V only; ±24 mA drive; no internal series resistors; higher speed (2.5 ns typ). | Not 5-V tolerant; incompatible voltage domain; requires level-shifting for legacy 5-V systems. | Choose only for new 3.3-V designs prioritizing lower voltage and higher speed over 5-V interoperability. |
Compared with SN74ABT162827DGGR, SN74ABT16244DGGR offers modularity but lacks integrated termination and half the width, while SN74LVC16244ADGGR delivers faster switching at 3.3 V but cannot replace it in mixed-voltage or 5-V-only systems without redesign.
Availability
SN74ABT162827DGGR is available at Aetrix Electronics and suitable for industrial automation, test instrumentation, and legacy computing infrastructure requiring stable component supply and long-term obsolescence management.
Supply support for SN74ABT162827DGGR 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 technologies, with decades of heritage in high-reliability interface and bus solutions.
The SN74ABT162827DGGR belongs to TI's Widebus™ family of advanced BiCMOS bus-interface devices, designed specifically for high-speed, low-noise parallel data transfer in industrial, telecom, and computing backplanes.
FAQ
What is the function of the dual output-enable inputs on SN74ABT162827DGGR?
The SN74ABT162827DGGR uses two active-low output-enable inputs per 10-bit section (e.g., 1OE1 and 1OE2 for the first buffer). Both must be low to activate the corresponding Y outputs; if either is high, all ten outputs enter high-impedance state. This provides redundant control for fault-tolerant gating in mission-critical bus interfaces.
Does SN74ABT162827DGGR require external termination resistors?
No. The SN74ABT162827DGGR integrates 25-Ω series resistors on all 20 outputs, eliminating the need for external termination. This reduces PCB component count, saves layout area, and ensures consistent edge-rate control without manual resistor selection or placement.
What is the maximum operating temperature range for SN74ABT162827DGGR?
The SN74ABT162827DGGR is characterized for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. It is not rated for extended military or automotive temperature ranges; the SN54ABT162827 variant supports –55°C to +125°C.
How does the flow-through pinout of SN74ABT162827DGGR benefit PCB design?
The SN74ABT162827DGGR arranges all inputs on one side and outputs on the opposite side of the 56-pin TSSOP package. This flow-through layout enables straight, short, length-matched traces - reducing crosstalk, skew, and EMI in high-speed parallel buses, and simplifying layer transitions in dense layouts.
Is SN74ABT162827DGGR still in active production?
No. According to Texas Instruments' official packaging information, SN74ABT162827DGGR is marked "OBSOLETE". However, Aetrix Electronics maintains legacy inventory and offers lifecycle management support, including cross-reference guidance and last-time-buy coordination for ongoing production needs.
SN74ABT162827DGGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74ABT162827DGGR FAQ
1.How can I place an order for SN74ABT162827DGGR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT162827DGGR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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6.How does Aetrix verify that SN74ABT162827DGGR is sourced from the original manufacturer or authorized distributors?
All SN74ABT162827DGGR 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 SN74ABT162827DGGR meets industry standards.
7.What is the process for return or replacement of SN74ABT162827DGGR?
All SN74ABT162827DGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT162827DGGR, 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 SN74ABT162827DGGR part is unused and in its original packaging.
Return procedure for SN74ABT162827DGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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