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Texas Instruments SN74ABTH16823DLG4
- Part No.:
- SN74ABTH16823DLG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABTH16823DLG4.pdf
- Description:
- IC FF D-TYPE SNGL 9BIT 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,404
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Product details
Overview
SN74ABTH16823DLG4 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 supports dual 9-bit or single 18-bit operation, features –32-mA/64-mA drive strength, bus-hold on inputs, and operates from –40°C to 85°C at 4.5–5.5 V.
For engineers reviewing the SN74ABTH16823DLG4 datasheet, SN74ABTH16823DLG4 pinout, SN74ABTH16823DLG4 application, or SN74ABTH16823DLG4 equivalent, key selection criteria include 3-state output timing (tPLH ≤ 6.8 ns), high-impedance behavior during power-up/down, distributed VCC/GND layout, and compatibility with 56-pin DL-package PCB footprints.
Technical Context
The SN74ABTH16823DLG4 implements two independent 9-bit D-type flip-flop sections, each with dedicated clock-enable (CLKEN), clear (CLR), and output-enable (OE) controls. Its EPIC-IIB BiCMOS process enables low power dissipation while delivering high-drive outputs and robust ESD protection (>2000 V HBM).
It uses flow-through architecture with distributed VCC/GND pins to minimize switching noise, and includes active bus-hold circuitry on all data inputs to eliminate external pullup/pulldown resistors. The device enters high-impedance state when VCC is below 2.1 V or when OE is asserted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | 18-bit D-type flip-flop with 3-state outputs; configurable as two 9-bit or one 18-bit register |
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL and mixed-voltage system rails |
| Output Drive | –32 mA IOH / 64 mA IOL - drives heavy capacitive buses without external buffers |
| Propagation Delay | tPLH/tPHL ≤ 6.8 ns @ 5 V - supports 150-MHz clock operation in high-speed data paths |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and control applications |
| ESD Protection | >2000 V HBM - enhances reliability in handling and board-level assembly environments |
| Bus-Hold Inputs | Active on all D inputs - prevents floating states without external resistors, reducing BOM count |
Pinout & Package
SN74ABTH16823DLG4 is packaged in a 56-pin Shrink Small-Outline Package (SSOP), DL variant, with 300-mil body width and 0.025-inch pin pitch. The package features distributed VCC and GND pins to suppress ground bounce and improve signal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1CLR, 2CLR | Asynchronous clear input (active-low) | Forces Q outputs low independently of clock; supports section-level reset |
| 1OE, 2OE | Output-enable input (active-low) | Places corresponding 9-bit outputs in high-impedance state without affecting internal latch state |
| 1CLKEN, 2CLKEN | Clock-enable input (active-low) | Disables clock buffer to hold Q outputs; enables gated-clock operation per section |
| 1CLK, 2CLK | Positive-edge-triggered clock input | Samples D inputs on rising edge; supports synchronous data capture per 9-bit section |
| 1D1–1D9, 2D1–2D9 | Data inputs | Each has integrated bus-hold; eliminates need for external biasing on unused lines |
| 1Q1–1Q9, 2Q1–2Q9 | 3-state output terminals | High-drive outputs support direct connection to shared data buses with minimal loading |
| VCC, GND | Power supply pins | Distributed across package (12 total: 6 VCC, 6 GND) to reduce simultaneous switching noise |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout | Input-to-output signal path alignment minimizes trace length and crosstalk in dense PCB layouts |
| High-impedance on power ramp | Outputs remain tri-stated when VCC is between 0–2.1 V, preventing bus contention during power-up/down |
| Distributed VCC/GND | 6 VCC and 6 GND pins reduce ground bounce (VOLP < 1 V) and improve noise margin at high speed |
| Bus-hold circuitry | Retains valid logic level on unconnected or unterminated D inputs, eliminating external pull resistors |
| EPIC-IIB BiCMOS process | Combines bipolar speed and CMOS low static power, achieving 0.5 mA typical ICC in disabled state |
Applications
| Industrial PLC I/O Modules | Backplane Data Buffers |
|---|---|
Use Scenario: Isolating and latching sensor/actuator signals in modular programmable logic controllers with shared backplane buses. IC Role / Device Role / Timing Role: 18-bit parallel register buffering digital I/O data with synchronized sampling and 3-state bus isolation. Use Value: Enables hot-swap-safe bus arbitration via OE control and eliminates external termination components using bus-hold inputs. | Use Scenario: Driving high-capacitance parallel address/data buses between CPU and peripheral cards in modular instrumentation racks. IC Role / Device Role / Timing Role: High-drive 18-bit bidirectional bus interface with precise setup/hold timing (tsu = 1.7 ns) for reliable inter-card communication. Use Value: Supports 150-MHz operation with low propagation skew and distributed power pins to maintain signal integrity across 20+ inch traces. |
| Embedded Control Registers | Legacy Bus Interface Adapters |
Use Scenario: Implementing working registers and status latches in microcontroller-based motor drives and power converters. IC Role / Device Role / Timing Role: Dual 9-bit register providing independent clock-enable and clear for separate control and feedback data paths. Use Value: Reduces FPGA or MCU GPIO usage by consolidating register functions into a single 56-pin SSOP with deterministic timing. | Use Scenario: Bridging modern processors to legacy ISA or VMEbus peripherals requiring 5-V tolerant, high-drive 3-state interfaces. IC Role / Device Role / Timing Role: Level-shifting and bus-driving interface with 5.5-V absolute max rating and 64-mA sink capability. Use Value: Replaces discrete transistor arrays with integrated solution that meets MIL-STD-883 ESD requirements and simplifies thermal design. |
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 |
|---|---|---|---|
| SN74ABT16823DLR | No bus-hold circuitry; lower drive (–24 mA/48 mA); identical pinout and timing | Requires external pullup/pulldown resistors on unused inputs; suited for cost-sensitive designs with controlled I/O routing | Select when bus-hold is unnecessary and lower power consumption is prioritized over input robustness |
| SN74LVCH16823DGGR | 3.3-V only operation (1.65–3.6 V); LVCMOS levels; higher tpd (~7.5 ns); 56-pin TSSOP | Not voltage-compatible with 5-V systems; requires level translation for legacy bus integration | Choose for new 3.3-V embedded platforms where lower power and smaller footprint outweigh 5-V interoperability needs |
Compared with SN74ABTH16823DLG4, SN74ABT16823DLR reduces input protection at lower cost, while SN74LVCH16823DGGR shifts to 3.3-V operation with trade-offs in voltage compatibility and timing margin-neither is pin-compatible nor drop-in replaceable without schematic and layout revision.
Availability
SN74ABTH16823DLG4 is available at Aetrix Electronics and suitable for industrial PLCs, backplane data buffers, embedded control registers, and legacy bus interface adapters requiring stable component supply and long-term lifecycle support.
Supply support for SN74ABTH16823DLG4 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 industrial and automotive-grade components.
The SN74ABTH16823DLG4 belongs to TI's Widebus™ family of high-speed bus-interface devices, engineered specifically for robust 5-V data-path buffering in noise-sensitive, high-density industrial control systems.
FAQ
What is the operating temperature range for SN74ABTH16823DLG4?
The SN74ABTH16823DLG4 is characterized for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. This range is validated per the recommended operating conditions in the SCBS664B datasheet and applies specifically to the SN74ABTH16823DLG4 in its DL-package configuration. Thermal performance is supported by θJA = 74°C/W for the DL package, enabling reliable operation in convection-cooled enclosures without forced airflow.
Does SN74ABTH16823DLG4 support independent control of its two 9-bit sections?
Yes, SN74ABTH16823DLG4 provides fully independent control for each 9-bit section via separate CLK, CLKEN, CLR, and OE inputs. The function table confirms that asserting 1CLR forces only 1Q1–1Q9 low, while 2CLR affects only 2Q1–2Q9. Similarly, 1OE and 2OE enable/disable their respective output groups without cross-talk, allowing asymmetric bus arbitration in multi-segment systems.
What is the maximum clock frequency supported by SN74ABTH16823DLG4?
The SN74ABTH16823DLG4 supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C, CL = 50 pF). This is confirmed by timing specifications showing tPLH ≤ 6.8 ns and tPHL ≤ 6.0 ns, yielding fmax = 1 / (tPLH + tPHL) ≈ 150 MHz. At full industrial temperature range, derating may apply, but the device maintains functional operation up to 150 MHz per datasheet limits.
How does the bus-hold feature work on SN74ABTH16823DLG4 inputs?
The bus-hold circuitry on SN74ABTH16823DLG4 actively retains the last-valid logic state on each D input when left floating, using weak feedback transistors. It draws ±100 µA at VI = 0.8 V or 2 V (per datasheet Section 6), eliminating need for external pullup/pulldown resistors. This feature is always enabled and requires no configuration - it operates across the full –40°C to +85°C range and supports robust I/O in modular or field-wirable systems.
Is SN74ABTH16823DLG4 pin-compatible with other members of the ABTH16823 family?
SN74ABTH16823DLG4 shares identical pinout and functionality with SN74ABTH16823DLR and SN74ABTH16823DLRG4, all using the 56-pin DL package. However, it is not pin-compatible with WD (ceramic flat) or DGG (thin shrink SOIC) variants due to differing package dimensions and land patterns. Mechanical compatibility is limited to DL-package variants only; PCB layout must match the 300-mil SSOP footprint with 0.025-inch pitch.
SN74ABTH16823DLG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABTH
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- 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
SN74ABTH16823DLG4 FAQ
1.How can I place an order for SN74ABTH16823DLG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABTH16823DLG4 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 SN74ABTH16823DLG4 reliable?
The price and inventory of SN74ABTH16823DLG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABTH16823DLG4 is usually 5 days.
3.What payment methods are accepted for SN74ABTH16823DLG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABTH16823DLG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABTH16823DLG4?
SN74ABTH16823DLG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABTH16823DLG4 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 SN74ABTH16823DLG4?
For technical support, including SN74ABTH16823DLG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABTH16823DLG4 requirements.
6.How does Aetrix verify that SN74ABTH16823DLG4 is sourced from the original manufacturer or authorized distributors?
All SN74ABTH16823DLG4 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 SN74ABTH16823DLG4 meets industry standards.
7.What is the process for return or replacement of SN74ABTH16823DLG4?
All SN74ABTH16823DLG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABTH16823DLG4, 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 SN74ABTH16823DLG4 part is unused and in its original packaging.
Return procedure for SN74ABTH16823DLG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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