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Texas Instruments SN74ABTH16823DL
- Part No.:
- SN74ABTH16823DL
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABTH16823DL.pdf
- Description:
- IC FF D-TYPE SNGL 9BIT 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,970
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Product details
Overview
SN74ABTH16823DL 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 control and data acquisition systems. It features dual 9-bit sections, –32-mA high-drive IOH, 64-mA IOL, bus-hold on all data inputs, and operates across –40°C to 85°C at 4.5–5.5 V.
For engineers reviewing the SN74ABTH16823DL datasheet, SN74ABTH16823DL pinout, SN74ABTH16823DL application, or SN74ABTH16823DL equivalent, key selection criteria include its 56-pin SSOP (DL) package, clock-enable and clear control logic, high-impedance state during power-up/down, and compatibility with TTL-level signaling in backplane and I/O expansion designs.
Technical Context
This device implements two independent 9-bit D-type flip-flop banks, each with dedicated CLK, CLKEN, CLR, and OE controls. Its EPIC-IIB BiCMOS process enables low power dissipation while delivering high drive strength and fast propagation delays (tPLH/tPHL ≤ 6.8 ns at 5 V).
The flow-through pin architecture minimizes PCB trace length and crosstalk; distributed VCC/GND pins reduce switching noise. Bus-hold circuitry eliminates external pullup/pulldown resistors on all 18 data inputs, and output-enable logic operates independently of internal latch state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | 18-bit D-type flip-flop with dual 9-bit sections and independent clock-enable/clear |
| 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 loads (e.g., >100 pF buses) without external buffers |
| Propagation Delay | tPLH/tPHL ≤ 6.8 ns (VCC = 5 V, CL = 50 pF) - supports 150-MHz clock operation in synchronous bus interfaces |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and instrumentation applications |
| Input Clamp Voltage | VIK = –1.2 V (II = –18 mA) - protects against negative transients on data/control lines |
| ESD Rating | >2000 V HBM, >200 V MM - enhances robustness in handling and board-level assembly environments |
Pinout & Package
SN74ABTH16823DL is housed in a 56-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, with 0.025-inch (0.64 mm) lead pitch and moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1CLR, 2CLR | Asynchronous clear input (active-low) | Forces Q outputs low independently of clock; enables reset synchronization across both 9-bit sections |
| 1OE, 2OE | Output-enable input (active-low) | Places corresponding 9-bit outputs in high-impedance state without affecting internal latch data |
| 1CLKEN, 2CLKEN | Clock-enable input (active-low) | Disables clock buffer to hold Q outputs stable; allows data retention during clock gating |
| 1CLK, 2CLK | Positive-edge-triggered clock input | Controls latching of D-inputs on rising edge when CLKEN is low |
| 1D1–1D9, 2D1–2D9 | Data inputs | Bus-hold enabled - prevents floating states without external biasing components |
| 1Q1–1Q9, 2Q1–2Q9 | 3-state outputs | High-drive (–32/64 mA) outputs with controlled VOLP (<1 V) for clean signal integrity on shared buses |
| VCC, GND | Power supply terminals | Distributed across package (12 VCC, 12 GND pins) - reduces simultaneous switching noise and improves PSRR |
Key Features
| Feature | Design Value |
|---|---|
| Bus-hold on all 18 data inputs | Eliminates need for 18 external pullup/pulldown resistors, reducing BOM count and PCB area in I/O expansion modules |
| Flow-through pinout architecture | Minimizes trace crossing and layer transitions - simplifies routing for high-density backplane interface boards |
| High-impedance during power-up/down | Outputs remain tri-stated when VCC is between 0–2.1 V - prevents bus contention during system power sequencing |
| EPIC-IIB BiCMOS process | Reduces dynamic power vs. pure bipolar while maintaining TTL-compatible voltage thresholds and drive strength |
| Distributed VCC/GND pinning | 12 power and 12 ground pins suppress ground bounce and improve noise margin in high-speed parallel bus applications |
Applications
| Industrial PLC Backplane Interface | Test Equipment Digital I/O Module |
|---|---|
|
Use Scenario: Interfacing microcontroller GPIOs to a 18-bit parallel backplane in programmable logic controller chassis. IC Role / Device Role / Timing Role: Acts as a buffered, latched bus transceiver with independent clock-enable per 9-bit segment for synchronized data capture. Use Value: High-drive outputs directly drive long, unterminated backplane traces; bus-hold prevents glitches during hot-swap insertion. |
Use Scenario: Expanding digital stimulus/response capability in automated test equipment with multi-channel pattern generation. IC Role / Device Role / Timing Role: Provides 18-bit bidirectional latched I/O with precise timing control via separate CLKEN and OE signals. Use Value: 150-MHz max clock frequency and sub-7-ns propagation delay support high-speed vector pattern rates without external timing compensation. |
| Medical Data Acquisition Buffer | Avionics Sensor Interface Board |
|
Use Scenario: Isolating and conditioning parallel sensor data streams (e.g., ADC outputs) before transmission to a central processor. IC Role / Device Role / Timing Role: Serves as a noise-immune, latched input register with 3-state outputs for multiplexed bus sharing. Use Value: Distributed power/ground pins and low VOLP (<1 V) ensure signal fidelity in EMI-sensitive medical environments. |
Use Scenario: Implementing fault-tolerant I/O buffering in line-replaceable units (LRUs) requiring deterministic reset behavior. IC Role / Device Role / Timing Role: Functions as dual 9-bit register with asynchronous CLR for safe initialization under flight control watchdog supervision. Use Value: –40°C to +85°C rating and >2000-V HBM ESD withstand meet DO-160 Section 22 lightning-induced transient requirements. |
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 |
|---|---|---|---|
| SN74ABT16823DL | Omits bus-hold circuitry; requires external pullup/pulldown resistors on all 18 data inputs | Suitable only where board layout guarantees defined input states; not recommended for floating-bus or hot-swap scenarios | Choose SN74ABT16823DL only if cost reduction outweighs design simplicity and reliability trade-offs. |
| SN74LVCH16823DGGR | 3.3-V only operation (1.65–3.6 V); LVCMOS-compatible I/O; lower drive (–24/24 mA); 56-pin TSSOP | Designed for low-voltage, low-power systems; incompatible with 5-V bus domains without level translation | Select SN74LVCH16823DGGR only for new 3.3-V architectures; not a drop-in replacement for SN74ABTH16823DL. |
Compared with SN74ABTH16823DL, SN74ABT16823DL lacks bus-hold and increases design complexity, while SN74LVCH16823DGGR shifts voltage domain and reduces drive capability - neither offers identical functionality, thermal range, or 5-V bus compatibility.
Availability
SN74ABTH16823DL is available at Aetrix Electronics and suitable for industrial PLC backplanes, automated test equipment I/O modules, and medical data acquisition systems requiring stable component supply and long-term obsolescence management.
Supply support for SN74ABTH16823DL 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 ICs.
The SN74ABTH16823DL belongs to TI's Widebus™ family of high-speed bus-interface logic, engineered specifically for robust, high-drive parallel data transfer in industrial and instrumentation systems.
FAQ
What is the maximum clock frequency supported by the SN74ABTH16823DL?
The SN74ABTH16823DL supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C, CL = 50 pF). This specification is validated across the full industrial temperature range (–40°C to +85°C), making SN74ABTH16823DL suitable for high-speed synchronous bus applications such as backplane data transfer and test pattern generation.
Does the SN74ABTH16823DL require external pullup or pulldown resistors on its data inputs?
No, the SN74ABTH16823DL includes active bus-hold circuitry on all 18 data inputs (1D1–1D9 and 2D1–2D9), which maintains valid logic levels on unused or floating inputs without external components. This feature reduces BOM count and improves reliability in systems with variable I/O loading, such as modular I/O expansion cards using SN74ABTH16823DL.
What is the purpose of the CLKEN pin on the SN74ABTH16823DL?
The CLKEN (clock-enable) pin on SN74ABTH16823DL disables the internal clock buffer when driven high, effectively freezing the Q outputs regardless of clock activity. This allows data retention during clock gating or system idle states while preserving latch contents - a critical capability in power-managed industrial controllers using SN74ABTH16823DL for register staging.
How does the SN74ABTH16823DL behave during power-up and power-down sequences?
When VCC is between 0 V and 2.1 V, the SN74ABTH16823DL automatically places all outputs in high-impedance state, preventing bus contention during power ramping. For guaranteed high-Z above 2.1 V, OE must be tied to VCC via a pullup resistor - a key design consideration for fault-tolerant systems relying on SN74ABTH16823DL for safe power sequencing.
What package type and dimensions does the SN74ABTH16823DL use?
The SN74ABTH16823DL uses a 56-pin Shrink Small-Outline Package (SSOP-DL) with 300-mil body width, 0.025-inch lead pitch, and 1.95-mm maximum height. Its JEDEC MO-153 compliant footprint supports standard surface-mount assembly processes, and the MSL Level-1 rating permits unlimited floor life before reflow - essential for high-mix manufacturing of systems incorporating SN74ABTH16823DL.
SN74ABTH16823DL 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
SN74ABTH16823DL FAQ
1.How can I place an order for SN74ABTH16823DL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABTH16823DL 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 SN74ABTH16823DL reliable?
The price and inventory of SN74ABTH16823DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABTH16823DL is usually 5 days.
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SN74ABTH16823DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABTH16823DL 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 SN74ABTH16823DL?
For technical support, including SN74ABTH16823DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABTH16823DL requirements.
6.How does Aetrix verify that SN74ABTH16823DL is sourced from the original manufacturer or authorized distributors?
All SN74ABTH16823DL 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 SN74ABTH16823DL meets industry standards.
7.What is the process for return or replacement of SN74ABTH16823DL?
All SN74ABTH16823DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABTH16823DL, 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 SN74ABTH16823DL part is unused and in its original packaging.
Return procedure for SN74ABTH16823DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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