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Texas Instruments 74ABTH16823DGGRE4
- Part No.:
- 74ABTH16823DGGRE4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74ABTH16823DGGRE4.pdf
- Description:
- IC FF D-TYPE DUAL 9BIT 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,991
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Product details
Overview
74ABTH16823DGGRE4 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 computing systems. It supports dual 9-bit or single 18-bit operation, features –32-mA IOH / 64-mA IOL drive strength, bus-hold on all data inputs, and operates at up to 150 MHz with VCC = 4.5–5.5 V.
For engineers reviewing the 74ABTH16823DGGRE4 datasheet, 74ABTH16823DGGRE4 pinout, 74ABTH16823DGGRE4 application, or 74ABTH16823DGGRE4 equivalent, key selection factors include its flow-through architecture for optimized PCB layout, distributed VCC/GND pins to suppress switching noise, high-impedance state during power-up/down, and compatibility with 5-V TTL logic systems requiring robust bus buffering.
Technical Context
The 74ABTH16823DGGRE4 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 ESD protection exceeding 2000 V (MIL-STD-883).
It uses a flow-through pinout architecture with distributed power/ground pins to minimize simultaneous switching noise. Bus-hold circuitry eliminates external pullup/pulldown resistors on data inputs, and the device enters high-impedance state when VCC is below 2.1 V during power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ABT (Advanced BiCMOS Technology) - combines TTL-compatible input thresholds with CMOS-level power efficiency and high drive. |
| Supply Voltage | 4.5 V to 5.5 V - ensures stable operation across standard 5-V industrial power rails with ±10% tolerance. |
| Max Clock Frequency | 150 MHz - supports high-speed data latching in wide parallel buses such as memory interfaces or I/O expansion. |
| Output Drive | –32 mA IOH / +64 mA IOL - drives heavily loaded backplanes or long traces without external buffers. |
| Propagation Delay | tPLH/tPHL ≤ 7.7 ns (max) - enables tight timing margins in synchronous bus designs with sub-7 ns critical paths. |
| Bus-Hold Current | ±100 µA - actively retains valid logic states on unused inputs, preventing floating nodes and system glitches. |
| ESD Rating | >2000 V HBM - meets MIL-STD-883 requirements for ruggedness in manufacturing and field environments. |
Pinout & Package
Package: 56-pin TSSOP (DGG), 13.9 mm × 6.0 mm body, 0.5-mm pitch, JEDEC MO-153 compliant, RoHS-compliant green finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1CLR, 2CLR | Asynchronous clear input (active-low) | Forces Q outputs low independently of clock; enables hardware reset of each 9-bit section. |
| 1OE, 2OE | Output-enable control (active-low) | Places corresponding 9-bit outputs in high-impedance state without affecting internal register state. |
| 1CLKEN, 2CLKEN | Clock enable (active-low) | Disables clock buffer to hold Q outputs static while allowing new D inputs to be loaded asynchronously. |
| 1CLK, 2CLK | Positive-edge-triggered clock input | Synchronizes data capture on rising edge; supports independent clocking of both 9-bit sections. |
| 1D1–1D9, 2D1–2D9 | Data inputs | Each has integrated bus-hold; eliminates need for external termination on unused lines. |
| 1Q1–1Q9, 2Q1–2Q9 | 3-state outputs | High-drive outputs support hot-swap capable bus arbitration and multi-drop topology. |
| VCC, GND | Distributed power/ground | Multiple VCC/GND pins reduce ground bounce (VOLP < 1 V) and improve signal integrity at high speed. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input and output pins positioned on opposite sides of package to simplify layer routing and minimize trace crossovers on dense PCBs. |
| Dual 9-bit or single 18-bit configuration | Flexible partitioning allows use as two independent registers or one wide latch-reducing BOM count in modular designs. |
| Bus-hold on all data inputs | Eliminates external pull resistors, reduces component count, and prevents undefined logic states during power transitions or signal glitches. |
| High-impedance during power-up/down | Automatically disables outputs when VCC < 2.1 V, preventing bus contention and back-driving during supply ramping. |
| Distributed VCC/GND pinning | Reduces simultaneous switching noise (SSN) and improves power delivery integrity for reliable 150-MHz operation. |
Applications
| Memory Interface Buffering | I/O Port Expansion |
|---|---|
Use Scenario: Buffering address/data lines between microcontroller and SRAM or Flash memory in embedded control systems. IC Role / Device Role / Timing Role: Acts as a registered bus interface that isolates memory bus capacitance while synchronizing read/write strobes. Use Value: Enables reliable 150-MHz burst transfers with deterministic setup/hold timing and eliminates need for discrete bus terminators. | Use Scenario: Expanding GPIO count on industrial PLCs using parallel I/O modules with shared data bus. IC Role / Device Role / Timing Role: Provides 18-bit bidirectional latched I/O port with independent OE control per 9-bit bank for time-multiplexed peripheral access. Use Value: Supports hot-plug detection via bus-hold inputs and prevents bus conflicts during module insertion/removal. |
| Backplane Data Latching | Legacy Bus Arbitration |
Use Scenario: Latching parallel data across a 16–18-bit passive backplane in test equipment or instrumentation racks. IC Role / Device Role / Timing Role: Serves as a high-drive, low-skew latch to drive long, unterminated traces with minimal signal degradation. Use Value: Delivers –32-mA/64-mA drive to overcome 50+ pF trace loading and maintains <7.7 ns propagation delay across full temperature range. | Use Scenario: Managing shared ISA or VMEbus data lines among multiple masters in legacy computing systems. IC Role / Device Role / Timing Role: Functions as a 3-state bus transceiver with asynchronous clear for priority-based bus grant handshaking. Use Value: Enables glitch-free bus ownership transfer using CLR and OE signals without requiring external 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 |
|---|---|---|---|
| SN74ABT162244DGGR | 16-bit non-inverting buffer (no flip-flop functionality); lacks clock, CLR, CLKEN, and storage capability. | Used only for level translation or fanout amplification-not for synchronous data capture or registered bus isolation. | Select when only buffering (not latching) is required; not suitable for clocked memory or I/O register applications. |
| 74ALVCH162244DLR | 16-bit 3-state buffer with 3.3-V operation (1.65–3.6 V); no bus-hold, lower drive (–24/+24 mA), no clocking logic. | Targets low-voltage mixed-signal systems; incompatible with 5-V TTL buses and cannot replace registered functionality. | Choose for 3.3-V domains where power efficiency matters more than 5-V compatibility or storage capability. |
Compared with SN74ABT162244DGGR and 74ALVCH162244DLR, the 74ABTH16823DGGRE4 uniquely provides synchronous 18-bit data registration, bus-hold, and 5-V high-drive-making it irreplaceable in applications requiring clocked bus interfacing with robust noise immunity and power sequencing safety.
Availability
74ABTH16823DGGRE4 is available at Aetrix Electronics and suitable for industrial control systems, test instrumentation, and legacy computing platforms requiring stable component supply, long-term lifecycle support, and guaranteed 5-V TTL compatibility.
Supply support for 74ABTH16823DGGRE4 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 ABTH family-including the 74ABTH16823DGGRE4-is engineered for demanding 5-V bus-interface applications requiring high-speed latching, noise-immune operation, and seamless integration into industrial and computing backplanes.
FAQ
What is the operating temperature range for the 74ABTH16823DGGRE4?
The 74ABTH16823DGGRE4 is rated for commercial operation from –40°C to +85°C. This range aligns with the SN74ABTH16823 specification and is validated per TI's recommended operating conditions. It does not support the extended military range (–55°C to +125°C) specified for the SN54ABTH16823 variant. Thermal derating is not required within this span under normal airflow conditions.
Does the 74ABTH16823DGGRE4 support hot-swap operation?
Yes-the 74ABTH16823DGGRE4 supports controlled hot-swap behavior via three key features: high-impedance state during power-up/down (VCC < 2.1 V), bus-hold on all data inputs, and independent OE control per 9-bit section. These allow safe insertion into live 5-V buses without causing contention or latch-up, provided OE is held inactive until power stabilizes.
Can the 74ABTH16823DGGRE4 be used as a single 18-bit register or must it operate as two 9-bit sections?
The 74ABTH16823DGGRE4 can be configured flexibly: as one 18-bit register using shared clock and control signals, or as two independent 9-bit registers with separate CLK, CLKEN, CLR, and OE inputs. The pinout and function table explicitly support both modes, and no hardware modification is needed to switch between them.
What is the purpose of the CLKEN pin on the 74ABTH16823DGGRE4?
The CLKEN (clock enable) pin on the 74ABTH16823DGGRE4 disables the internal clock buffer when high, freezing Q outputs regardless of CLK activity. This allows new D-input data to be loaded asynchronously while holding registered outputs stable-a critical feature for pipeline control and partial register updates without full reset.
Is the 74ABTH16823DGGRE4 pin-compatible with other ABTH-series devices like the 74ABTH162244?
No-the 74ABTH16823DGGRE4 is not pin-compatible with the 74ABTH162244 or any other ABTH buffer. It has a unique 56-pin TSSOP (DGG) footprint with dedicated clock, clear, and clock-enable signals absent in non-latching buffers. Pin mapping, signal roles, and functional architecture differ fundamentally; PCB redesign is required for substitution.
74ABTH16823DGGRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABTH
- Package/Case:
- 56-TFSOP (0.240", 6.10mm 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:
- 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
74ABTH16823DGGRE4 FAQ
1.How can I place an order for 74ABTH16823DGGRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABTH16823DGGRE4 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 74ABTH16823DGGRE4 reliable?
The price and inventory of 74ABTH16823DGGRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABTH16823DGGRE4 is usually 5 days.
3.What payment methods are accepted for 74ABTH16823DGGRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABTH16823DGGRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABTH16823DGGRE4?
74ABTH16823DGGRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABTH16823DGGRE4 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 74ABTH16823DGGRE4?
For technical support, including 74ABTH16823DGGRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABTH16823DGGRE4 requirements.
6.How does Aetrix verify that 74ABTH16823DGGRE4 is sourced from the original manufacturer or authorized distributors?
All 74ABTH16823DGGRE4 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 74ABTH16823DGGRE4 meets industry standards.
7.What is the process for return or replacement of 74ABTH16823DGGRE4?
All 74ABTH16823DGGRE4 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABTH16823DGGRE4, 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 74ABTH16823DGGRE4 part is unused and in its original packaging.
Return procedure for 74ABTH16823DGGRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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