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Texas Instruments SN74ABTH16823DGGR
- Part No.:
- SN74ABTH16823DGGR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74ABTH16823DGGR.pdf
- Description:
- IC FF D-TYPE DUAL 9BIT 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,000
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Product details
Overview
SN74ABTH16823 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 all data inputs, and operates from –40°C to 85°C at 4.5–5.5 V.
For engineers reviewing the SN74ABTH16823 datasheet, SN74ABTH16823 pinout, SN74ABTH16823 application, or SN74ABTH16823 equivalent, this device is selected for high-speed bidirectional bus buffering, I/O port expansion, and parity-enabled register interfaces where low ground bounce (<1 V), power-up high-impedance safety, and flow-through PCB layout are critical.
Technical Context
The SN74ABTH16823 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 high-speed switching (150 MHz max clock) while maintaining TTL-compatible input thresholds (VIL = 0.8 V, VVIH = 2 V) and low power dissipation.
It uses distributed VCC/GND pinning and flow-through architecture to minimize simultaneous switching noise. Bus-hold circuitry actively maintains valid logic levels on floating data inputs without external resistors, and outputs enter high-impedance state during power-up/down when VCC < 2.1 V.
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 5-V TTL and mixed-voltage system backplanes |
| Output Drive | –32 mA IOH, 64 mA IOL - drives heavy capacitive loads (e.g., >50 pF buses) without signal degradation |
| Max Clock Frequency | 150 MHz - supports high-throughput data latching in real-time control and memory interface applications |
| Propagation Delay | tPLH/tPHL ≤ 6.8 ns (typ) - enables sub-7-ns timing margins for synchronous bus designs |
| Bus-Hold Current | ±100 µA at VCC = 4.5 V - eliminates need for external pullup/pulldown resistors on unused data lines |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and automation equipment |
Pinout & Package
SN74ABTH16823 is packaged in a 56-pin Thin Shrink Small-Outline (DGG) package with 0.5-mm pitch, optimized for high-density PCB layouts and thermal performance (θJA = 81°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1CLR, 2CLR | Asynchronous clear input (active-low) | Forces Q outputs low independently of clock; enables hardware reset of register sections |
| 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 constant; enables gated clocking per section |
| 1CLK, 2CLK | Positive-edge-triggered clock input | Samples D inputs on rising edge; supports synchronous data capture across both sections |
| 1D1–1D9, 2D1–2D9 | Data inputs | Each has integrated bus-hold; retains last valid logic level when floating |
| 1Q1–1Q9, 2Q1–2Q9 | 3-state registered outputs | High-drive outputs support direct connection to shared bus lines without interface components |
| VCC, GND | Distributed power/ground pins | Multiple VCC/GND pairs reduce switching noise and improve signal integrity at high speed |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pin architecture | Input-to-output signal path aligned across package width - simplifies layer routing and reduces trace length mismatch |
| Power-up/power-down high-impedance | Outputs automatically enter Z-state when VCC < 2.1 V - prevents bus contention during supply sequencing |
| Low ground bounce (VOLP) | <1 V at VCC = 5 V, TA = 25°C - maintains signal integrity during fast output transitions |
| ESD protection | >2000 V HBM, >200 V machine model - enhances robustness in handling and board assembly environments |
| Distributed VCC/GND configuration | 12 total VCC/GND pins interleaved across 56-pin layout - lowers impedance and suppresses simultaneous switching noise |
Applications
| Industrial Backplane Interface | Memory-Mapped I/O Expansion |
|---|---|
|
Use Scenario: Interfacing microcontroller GPIOs to a 16-bit parallel backplane with long trace runs and multiple drop points. IC Role / Device Role / Timing Role: Acts as a buffered, latched bus transceiver that isolates MCU from bus capacitance and provides synchronized data staging. Use Value: High-drive outputs (64 mA sink) maintain signal rise/fall times across 100+ pF loads; bus-hold eliminates pullup resistor networks on unconnected address/data lines. |
Use Scenario: Expanding peripheral I/O count in programmable logic controllers (PLCs) using parallel memory-mapped registers. IC Role / Device Role / Timing Role: Functions as a dual 9-bit working register bank with independent clock-enable and clear per section for modular control logic. Use Value: Independent CLKEN/CLR per 9-bit block allows selective reset and clock gating - reducing power and enabling deterministic state management. |
| Parity-Enabled Bidirectional Bus Driver | High-Speed Test Equipment Data Capture |
|
Use Scenario: Driving a 16-bit data bus with parity generation/checking logic in telecom line cards. IC Role / Device Role / Timing Role: Provides 18-bit latching (16 data + 2 parity bits) with 3-state control for bidirectional bus arbitration. Use Value: OE-controlled high-impedance state enables clean bus release during direction switching; low tPZL/tPLZ (≤5.5 ns) minimizes bus turnaround latency. |
Use Scenario: Capturing parallel digital waveforms from FPGA-based test instruments at >100 MHz sampling rates. IC Role / Device Role / Timing Role: Serves as a synchronous input sampler with precise setup/hold (tsu = 1.7 ns, th = 1.2 ns) and minimal propagation skew. Use Value: 150 MHz max clock and sub-7 ns tPLH/tPHL enable reliable capture of fast edge-aligned signals without metastability risk. |
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 |
|---|---|---|---|
| SN74ABT16823DGGR | Same pinout and function but lacks bus-hold circuitry; requires external pullup/pulldown resistors on unused inputs | Less suitable for systems with undriven or intermittently connected data lines | Select SN74ABT16823DGGR only if bus-hold is unnecessary and BOM cost reduction is prioritized |
| SN74ALVTH16823DGGR | Lower voltage operation (2.3–2.7 V or 3–3.6 V); higher speed (200 MHz), but reduced drive (–24 mA/48 mA) | Targeted at low-voltage, high-speed ASIC/FPGA interconnect-not compatible with 5-V legacy buses | Choose SN74ALVTH16823DGGR only for new 2.5-V/3.3-V designs requiring faster timing and lower power |
Compared with SN74ABT16823DGGR, the SN74ABTH16823 offers integrated bus-hold for robust floating-input handling; versus SN74ALVTH16823DGGR, it delivers higher drive strength and 5-V compatibility essential for industrial backplane interfacing.
Availability
SN74ABTH16823 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and embedded communications systems requiring stable component supply, long-lifecycle support, and guaranteed 5-V bus interface compatibility.
Supply support for SN74ABTH16823 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 interface and bus technologies.
The SN74ABTH16823 belongs to TI's Widebus™ family of advanced bus-interface devices, engineered specifically for noise-immune, high-drive parallel data transfer in industrial and telecom infrastructure.
FAQ
What is the maximum clock frequency supported by the SN74ABTH16823?
The SN74ABTH16823 supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C). This rating is validated across the full industrial temperature range (–40°C to +85°C) and applies to both 9-bit sections independently. The SN74ABTH16823 achieves this speed via its EPIC-IIB BiCMOS process and optimized internal timing paths.
Does the SN74ABTH16823 require external pullup or pulldown resistors on its data inputs?
No, the SN74ABTH16823 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 a valid logic level (high or low) on floating or unused inputs, eliminating the need for discrete resistors and reducing BOM count and board space.
How does the SN74ABTH16823 behave during power-up and power-down sequences?
During power-up or power-down, the SN74ABTH16823 automatically places all outputs in a high-impedance state whenever VCC is below 2.1 V. This behavior prevents bus contention and unintended signal driving before the supply stabilizes. For guaranteed high-Z above 2.1 V, OE must be tied to VCC via a pullup resistor.
Can the SN74ABTH16823 be used as a single 18-bit register or only as two separate 9-bit registers?
The SN74ABTH16823 can be configured flexibly as either two independent 9-bit registers (using separate 1CLK/2CLK, 1CLKEN/2CLKEN, 1CLR/2CLR, and 1OE/2OE controls) or as a unified 18-bit register by tying corresponding control inputs together. Its dual-section architecture supports both modes without performance penalty or functional limitation.
What package type is used for the SN74ABTH16823DGGR variant?
The SN74ABTH16823DGGR uses a 56-pin Thin Shrink Small-Outline Package (DGG) with 0.5-mm lead pitch. This RoHS-compliant, surface-mount package measures 12.5 mm × 6.1 mm and features exposed thermal pad capability, supporting automated assembly and thermal management in high-density industrial PCBs.
SN74ABTH16823DGGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABTH
- Package/Case:
- 56-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Bulk
- 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:
- 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-TSSOP
SN74ABTH16823DGGR FAQ
1.How can I place an order for SN74ABTH16823DGGR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABTH16823DGGR 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 SN74ABTH16823DGGR reliable?
The price and inventory of SN74ABTH16823DGGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABTH16823DGGR is usually 5 days.
3.What payment methods are accepted for SN74ABTH16823DGGR?
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SN74ABTH16823DGGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABTH16823DGGR 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 SN74ABTH16823DGGR?
For technical support, including SN74ABTH16823DGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABTH16823DGGR requirements.
6.How does Aetrix verify that SN74ABTH16823DGGR is sourced from the original manufacturer or authorized distributors?
All SN74ABTH16823DGGR 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 SN74ABTH16823DGGR meets industry standards.
7.What is the process for return or replacement of SN74ABTH16823DGGR?
All SN74ABTH16823DGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABTH16823DGGR, 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 SN74ABTH16823DGGR part is unused and in its original packaging.
Return procedure for SN74ABTH16823DGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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