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Texas Instruments SN74ABT162823ADLR
- Part No.:
- SN74ABT162823ADLR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT162823ADLR.pdf
- Description:
- IC FF D-TYPE DUAL 9BIT 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,597
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Product details
Overview
SN74ABT162823ADLR from Texas Instruments is an 18-bit bus-interface D-type flip-flop with 3-state outputs, designed for driving high-capacitance or low-impedance loads in backplane and motherboard data paths. It supports dual 9-bit or single 18-bit operation, features 25-Ω integrated series output resistors, 150 MHz maximum clock frequency, and hot-insertion capability via Ioff and power-up 3-state.
For engineers reviewing the SN74ABT162823ADLR datasheet, SN74ABT162823ADLR pinout, SN74ABT162823ADLR application, or SN74ABT162823ADLR equivalent, key selection criteria include its flow-through SSOP/TSSOP layout, distributed VCC/GND pins for noise reduction, guaranteed 2.3 ns tPLH propagation delay at 5 V, and compatibility with 5-V TTL-level systems requiring robust bus isolation and latch control.
Technical Context
This device implements two independent 9-bit D-type flip-flop sections, each with dedicated clock (CLK), clock-enable (CLKEN), clear (CLR), and output-enable (OE) controls. Its architecture enables synchronous data latching on CLK↑ while allowing output disable/enable independent of internal state retention.
It integrates on-die 25-Ω series termination per output to suppress overshoot/undershoot without external components, and employs distributed power/ground pin placement across the 56-pin TSSOP package to minimize simultaneous switching noise during high-speed transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL logic rails and margin against supply droop. |
| Max Clock Frequency | 150 MHz - supports high-throughput data buffering in memory interfaces and parallel bus systems. |
| tPLH / tPHL | 2.3 ns / 2.8 ns (typ, VCC = 5 V) - enables sub-7 ns total propagation window for timing-critical register staging. |
| Output Drive | ±12 mA - sufficient to drive 50-pF loads at full speed without external buffers or pull-ups. |
| Input Transition Rate | 10 ns/V - defines minimum allowable input slew rate to prevent metastability or false triggering. |
| Power-Up 3-State | Active - places outputs in high-Z during VCC ramp-up/down, preventing bus contention in hot-swap systems. |
| Ioff Support | Yes - blocks current backflow when powered down, enabling safe insertion into live backplanes. |
Pinout & Package
The SN74ABT162823ADLR is housed in a 56-pin TSSOP (DGG) package with 1.2 mm max height, 0.5 mm pitch, and JEDEC MO-153 compliance. Pin numbering follows standard top-view orientation with Pin 1 marked by a corner chamfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1CLR, 2CLR | Asynchronous Clear Input | Forces respective Q outputs low regardless of clock; active-low, TTL-compatible threshold. |
| 1OE, 2OE | Output Enable Input | Controls high-impedance state of nine outputs per section; does not affect internal latch state. |
| 1CLK, 2CLK | Clock Input | Edge-triggered on low-to-high transition; synchronizes D→Q transfer when CLKEN is low. |
| 1CLKEN, 2CLKEN | Clock Enable Input | Disables clock buffer when high, freezing Q outputs while preserving D-input sampling capability. |
| 1D1–1D9, 2D1–2D9 | Data Inputs | Individual D inputs per flip-flop; support independent loading of each 9-bit section. |
| 1Q1–1Q9, 2Q1–2Q9 | Registered Outputs | 3-state, 25-Ω series-terminated outputs; drive bus lines directly without external resistors. |
| VCC, GND | Power & Ground | Distributed across package (12× VCC, 12× GND) to reduce simultaneous switching noise and improve signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω Series Termination | Eliminates need for external source-series resistors, reducing BOM count and PCB area in high-speed bus designs. |
| Flow-Through Pinout Architecture | Input pins on one side and outputs on opposite side simplifies layer routing and minimizes trace crossovers in dense layouts. |
| Hot-Insertion Support | Ioff and power-up 3-state prevent damage and bus conflicts during live system expansion or module replacement. |
| Dual 9-Bit or Single 18-Bit Configuration | Flexible partitioning allows use as two independent registers or one wide latch, adapting to varying data-path widths. |
| Low Ground Bounce (VOLP) | Typical <1 V at VCC = 5 V - maintains signal fidelity and reduces noise coupling into analog or mixed-signal sections. |
Applications
| Backplane Data Buffering | Industrial I/O Expansion Module |
|---|---|
Use Scenario: Bidirectional data transfer between CPU and peripheral cards in modular rack-mounted systems with hot-swap capability. IC Role / Device Role / Timing Role: 18-bit registered transceiver providing synchronized, isolated data path with glitch-free enable/disable control. Use Value: Integrated 25-Ω termination and Ioff support eliminate external components and ensure safe insertion into live backplanes. | Use Scenario: Local bus interface between microcontroller and multi-channel digital I/O bank in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Wide buffer register latching sensor/actuator status and command data under precise clock control. Use Value: 150 MHz clock rating and sub-3 ns propagation delay enable real-time response in deterministic industrial control loops. |
| Memory Interface Latch | Test Equipment Bus Driver |
Use Scenario: Address/data staging between FPGA controller and parallel SRAM or Flash memory in embedded instrumentation. IC Role / Device Role / Timing Role: Synchronous 18-bit latch isolating memory bus from controller timing variations and load mismatches. Use Value: Distributed VCC/GND pins and low VOLP minimize switching noise that could corrupt memory read/write margins. | Use Scenario: Signal conditioning and fanout for pattern generator or logic analyzer front-end channels. IC Role / Device Role / Timing Role: High-drive, low-skew bus driver translating test controller outputs to multiple DUT interface points. Use Value: ±12 mA drive strength and flow-through pinout simplify interconnect design and maintain signal edge integrity across multiple loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 18-bit bus-interface flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT162823ADL | Same silicon, SSOP-56 package (DL) instead of TSSOP-56 (DGG); higher θJA (56°C/W vs 64°C/W). | Preferred where board space permits larger SSOP footprint and thermal dissipation margin is critical. | Select SN74ABT162823ADL for legacy SSOP-compatible designs or lower thermal resistance requirements. |
| SN74ALVTH162823GR | Lower voltage (2.3–3.6 V), higher speed (200 MHz), but no integrated 25-Ω termination or Ioff. | Suitable for modern low-voltage systems where external termination and hot-swap are handled elsewhere. | Choose SN74ALVTH162823GR only if operating below 3.6 V and external termination is acceptable. |
Compared with SN74ABT162823ADL, the SN74ABT162823ADLR offers identical logic and timing but in a smaller, lead-free TSSOP package optimized for high-density layouts; versus SN74ALVTH162823GR, it trades voltage flexibility and peak speed for built-in termination and hot-insertion safety in 5-V environments.
Availability
SN74ABT162823ADLR is available at Aetrix Electronics and suitable for backplane buffering, industrial I/O expansion, memory interface latching, and test equipment bus driving requiring stable component supply and long-term production continuity.
Supply support for SN74ABT162823ADLR 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 over 50 years of innovation in high-reliability interface and bus technologies.
The SN74ABT162823ADLR belongs to TI's Widebus™ family of advanced bus-interface devices, engineered specifically for robust, high-speed data transfer in noisy, high-density computing and industrial control environments.
FAQ
What is the recommended operating voltage range for the SN74ABT162823ADLR?
The SN74ABT162823ADLR is specified for operation from 4.5 V to 5.5 V. Operation outside this range may cause unreliable logic behavior or damage. The device draws ICC ≤ 80 mA under full-load conditions at VCC = 5.5 V, and its inputs tolerate VI up to 7 V, supporting mixed-voltage interfacing with appropriate level translation.
Does the SN74ABT162823ADLR support hot-plug insertion?
Yes, the SN74ABT162823ADLR supports hot insertion through two complementary features: Ioff circuitry disables outputs when VCC = 0 V, preventing back-current flow, and power-up 3-state forces outputs into high-impedance during power ramp-up/down. These features are fully characterized per JESD78 and validated across −40°C to 85°C.
How many independent clock domains does the SN74ABT162823ADLR provide?
The SN74ABT162823ADLR provides two independent clock domains - one for each 9-bit section (1CLK/1CLKEN/1CLR/1OE and 2CLK/2CLKEN/2CLR/2OE). Each domain operates asynchronously, allowing separate timing control for bidirectional data flow or staggered latch operations without cross-section interference.
What is the purpose of the CLKEN input on the SN74ABT162823ADLR?
The CLKEN (clock enable) input on the SN74ABT162823ADLR gates the clock buffer for each 9-bit section. When CLKEN is high, the internal clock path is disabled, freezing Q outputs regardless of CLK activity. This allows data hold without stopping the system clock, enabling precise timing control in pipelined architectures using the SN74ABT162823ADLR.
Can the SN74ABT162823ADLR be used as a single 18-bit register or only as two 9-bit registers?
The SN74ABT162823ADLR can be configured either as two independent 9-bit registers or as one unified 18-bit register. Tie 1CLK to 2CLK, 1CLKEN to 2CLKEN, 1CLR to 2CLR, and 1OE to 2OE to operate all 18 bits synchronously. The datasheet explicitly confirms this dual-mode functionality in the description and function table.
SN74ABT162823ADLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 2
- Number of Bits per Element:
- 9
- Clock Frequency:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 6.2ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 500 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-SSOP
SN74ABT162823ADLR FAQ
1.How can I place an order for SN74ABT162823ADLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT162823ADLR 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 SN74ABT162823ADLR reliable?
The price and inventory of SN74ABT162823ADLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT162823ADLR is usually 5 days.
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Once your SN74ABT162823ADLR 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 SN74ABT162823ADLR?
For technical support, including SN74ABT162823ADLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT162823ADLR requirements.
6.How does Aetrix verify that SN74ABT162823ADLR is sourced from the original manufacturer or authorized distributors?
All SN74ABT162823ADLR 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 SN74ABT162823ADLR meets industry standards.
7.What is the process for return or replacement of SN74ABT162823ADLR?
All SN74ABT162823ADLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT162823ADLR, 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 SN74ABT162823ADLR part is unused and in its original packaging.
Return procedure for SN74ABT162823ADLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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