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Texas Instruments SN74ABTH16823DLR
- Part No.:
- SN74ABTH16823DLR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABTH16823DLR.pdf
- Description:
- IC FF D-TYPE DUAL 9BIT 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,349
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Product details
Overview
SN74ABTH16823DLR from Texas Instruments is an 18-bit bus-interface D-type flip-flop with 3-state outputs, designed for high-capacitance bus driving in industrial and embedded systems. It features dual 9-bit sections, –32-mA/64-mA drive strength, bus-hold on all data inputs, and operates from 4.5 V to 5.5 V across –40°C to 85°C.
For engineers reviewing the SN74ABTH16823DLR datasheet, SN74ABTH16823DLR pinout, SN74ABTH16823DLR application, or SN74ABTH16823DLR equivalent, this page delivers verified electrical specs, timing parameters, package details, real-world use cases, and validated alternative options for bus buffering, I/O port expansion, and bidirectional data latching.
Technical Context
The SN74ABTH16823DLR implements two independent 9-bit D-type flip-flop banks, each with dedicated clock-enable (CLKEN), clear (CLR), and output-enable (OE) controls. Its EPIC-IIB BiCMOS architecture enables low power dissipation while delivering high-speed switching (150 MHz max clock frequency) and low ground bounce (<1 V VOLP).
It supports flow-through pin mapping for optimized PCB layout, distributed VCC/GND pins to suppress noise, and active bus-hold circuitry eliminating external pull resistors. Power-up/power-down high-impedance behavior ensures bus integrity during supply transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | 18-bit D-type flip-flop with dual 9-bit sections and independent control inputs |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V TTL and mixed-voltage system interfaces |
| Output Drive | –32 mA IOH / 64 mA IOL - sufficient to drive heavily loaded buses without external buffers |
| Max Clock Frequency | 150 MHz - supports high-speed synchronous data latching in backplane and memory interface applications |
| Propagation Delay | tPLH/tPHL ≤ 5.5 ns (VCC = 5 V, CL = 50 pF) - enables tight timing margins in fast digital systems |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade operation without derating |
| Bus-Hold Inputs | Integrated on all 18 data inputs - prevents floating states and eliminates need for external pullup/pulldown resistors |
Pinout & Package
SN74ABTH16823DLR uses a 56-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, with 0.025-inch (0.635 mm) lead pitch. Pin 1 is located in Quadrant Q1 per tape-and-reel orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1CLR, 2CLR | Asynchronous clear input (active-low) | Forces corresponding 9-bit Q outputs low independently of clock; critical for reset synchronization |
| 1OE, 2OE | Output-enable input (active-low) | Places respective 9-bit outputs in high-impedance state; enables shared bus arbitration |
| 1CLKEN, 2CLKEN | Clock-enable input (active-low) | Disables clock buffer to hold current Q state; allows data retention during clock gating |
| 1CLK, 2CLK | Positive-edge-triggered clock input | Controls data capture on rising edge; dual clocks support independent timing domains |
| 1D1–1D9, 2D1–2D9 | Data inputs | 18 total inputs with integrated bus-hold - no external biasing required for unused lines |
| 1Q1–1Q9, 2Q1–2Q9 | 3-state buffered outputs | High-drive outputs with fast enable/disable times (tPZH/tPLZ ≤ 6.4 ns) for clean bus transitions |
| VCC, GND | Power and ground terminals | Distributed across package (12 VCC/GND pairs) - minimizes simultaneous switching noise |
Key Features
| Feature | Design Value |
|---|---|
| Dual 9-bit configuration | Enables flexible partitioning: single 18-bit register or two independent 9-bit latches with separate controls |
| Flow-through pinout | Input-to-output signal path alignment reduces trace length and crosstalk in dense PCB layouts |
| High-impedance during power transition | Outputs remain Hi-Z when VCC is between 0 V and 2.1 V - prevents bus contention at power-up/down |
| EPIC-IIB BiCMOS process | Combines bipolar speed and CMOS density - achieves 150 MHz operation with <1 V ground bounce |
| ESD protection | Exceeds 2000 V HBM and 200 V machine model - enhances robustness in handling and assembly |
Applications
| Backplane Data Latching | Industrial I/O Expansion |
|---|---|
Use Scenario: Latching parallel data from microcontroller GPIO ports onto a multi-slot backplane with long trace runs and high capacitance. IC Role / Device Role / Timing Role: 18-bit synchronous latch providing edge-aligned data capture and 3-state isolation between slots. Use Value: High-drive outputs (64 mA sink) maintain signal integrity across 50+ pF loads; bus-hold prevents glitches on unconnected slots. | Use Scenario: Expanding PLC digital I/O capacity using isolated 9-bit input and output banks with independent enable control. IC Role / Device Role / Timing Role: Dual-configurable bus interface IC acting as both input sampler and output driver with asynchronous reset. Use Value: Independent CLKEN and OE per bank allow staggered sampling and selective output activation - reducing CPU polling overhead. |
| Memory Interface Buffering | Legacy Bus Arbitration |
Use Scenario: Isolating and latching address/data signals between a 5-V microprocessor and SRAM with strict setup/hold timing. IC Role / Device Role / Timing Role: Timing-critical 18-bit register ensuring sub-6 ns propagation delay and 1.7 ns data setup before clock edge. Use Value: Verified tsu = 1.7 ns and tPLH/tPHL ≤ 5.5 ns meet tight SRAM access windows without added wait states. | Use Scenario: Managing shared ISA or VME bus lines among multiple masters with dynamic direction control and contention avoidance. IC Role / Device Role / Timing Role: Bidirectional bus driver with independent OE control per 9-bit segment and glitch-free Hi-Z transitions. Use Value: tPZH/tPLZ ≤ 4.9 ns and guaranteed Hi-Z during power ramp ensure safe bus handoff without arbitration logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus-interface flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT16373DGGR | 16-bit transparent latch (not edge-triggered); no CLKEN; lower drive (–32/64 mA same, but no bus-hold) | Suitable for level-sensitive latching only; requires external pull resistors on inputs | Select when transparent latch behavior is preferred over edge-triggered flip-flop operation |
| SN74ALVCH162244DLR | 16-bit non-inverting buffer (no storage); no clock or latch function; includes voltage translation (1.65–3.6 V I/O) | Used for level-shifting and fanout only - lacks data retention capability | Choose for voltage-level translation and bus buffering where storage is handled elsewhere |
Compared with SN74ABTH16823DLR, SN74ABT16373DGGR offers simpler control but no clock-enable or bus-hold, while SN74ALVCH162244DLR provides voltage flexibility but zero storage functionality - making SN74ABTH16823DLR uniquely suited for synchronous, self-contained 18-bit data latching in 5-V industrial buses.
Availability
SN74ABTH16823DLR is available at Aetrix Electronics and suitable for industrial automation, backplane interconnect, and legacy bus interface applications requiring stable component supply, long-lifecycle support, and guaranteed 5-V TTL compatibility.
Supply support for SN74ABTH16823DLR 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 industrial and aerospace components.
The SN74ABTH16823DLR belongs to TI's Widebus™ family of high-speed bus-interface devices, engineered specifically for robust, noise-immune data latching and driving in electrically demanding 5-V system environments.
FAQ
What is the maximum clock frequency supported by SN74ABTH16823DLR?
The SN74ABTH16823DLR supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C, CL = 50 pF). This value is confirmed in the switching characteristics table of the official datasheet SCBS664B and applies to both 9-bit sections independently. At temperature extremes or higher capacitive loads, timing margins must be verified per the full AC specification table.
Does SN74ABTH16823DLR require external pullup or pulldown resistors on its data inputs?
No, SN74ABTH16823DLR does not require external pullup or pulldown resistors on its data inputs because it integrates active bus-hold circuitry on all 18 D-inputs. This feature maintains valid logic levels on unused or floating inputs, as explicitly stated in the device description and electrical characteristics section of the SCBS664B datasheet.
What package type and dimensions does SN74ABTH16823DLR use?
SN74ABTH16823DLR uses a 56-pin Shrink Small-Outline Package (SSOP) with designation DL, measuring 18.4 mm × 7.5 mm × 2.3 mm (length × width × height), 300-mil body width, and 0.025-inch (0.635 mm) lead pitch. Pin 1 orientation follows Quadrant Q1 per TI's tape-and-reel packaging specification.
Can SN74ABTH16823DLR operate safely during power-up and power-down sequences?
Yes, SN74ABTH16823DLR enters a high-impedance state when VCC is between 0 V and 2.1 V, preventing bus contention during power transitions. For guaranteed Hi-Z above 2.1 V, OE should be tied to VCC via a pullup resistor - a design requirement clearly documented in the "description (continued)" section of the SCBS664B datasheet.
What is the output drive capability of SN74ABTH16823DLR, and how does it impact bus loading?
SN74ABTH16823DLR delivers –32 mA source current (IOH) and 64 mA sink current (IOL) per output, enabling direct driving of highly capacitive or low-impedance buses without intermediate buffers. This high-drive capability supports reliable signal integrity across trace loads up to 50 pF, as validated in timing tests with CL = 50 pF in the SCBS664B datasheet.
SN74ABTH16823DLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABTH
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 5.5ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 500 µA
- Input Capacitance:
- 4 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-SSOP
SN74ABTH16823DLR FAQ
1.How can I place an order for SN74ABTH16823DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABTH16823DLR 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 SN74ABTH16823DLR reliable?
The price and inventory of SN74ABTH16823DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABTH16823DLR is usually 5 days.
3.What payment methods are accepted for SN74ABTH16823DLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABTH16823DLR transactions.
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4.How is shipping managed for SN74ABTH16823DLR?
SN74ABTH16823DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABTH16823DLR 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 SN74ABTH16823DLR?
For technical support, including SN74ABTH16823DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABTH16823DLR requirements.
6.How does Aetrix verify that SN74ABTH16823DLR is sourced from the original manufacturer or authorized distributors?
All SN74ABTH16823DLR 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 SN74ABTH16823DLR meets industry standards.
7.What is the process for return or replacement of SN74ABTH16823DLR?
All SN74ABTH16823DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABTH16823DLR, 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 SN74ABTH16823DLR part is unused and in its original packaging.
Return procedure for SN74ABTH16823DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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