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Texas Instruments SN74ALVCH16823DGGR
- Part No.:
- SN74ALVCH16823DGGR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74ALVCH16823DGGR.pdf
- Description:
- IC FF D-TYPE DUAL 9BIT 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,202
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Product details
Overview
SN74ALVCH16823 from Texas Instruments is an 18-bit bus-interface D-type flip-flop with 3-state outputs, designed for 1.65-V to 3.6-V VCC operation. It functions as two independent 9-bit registers or one 18-bit register, features bus-hold on all data inputs, and supports clock-enable and asynchronous clear for precise timing control in high-speed digital buses.
For engineers reviewing the SN74ALVCH16823 datasheet, SN74ALVCH16823 pinout, SN74ALVCH16823 application, or SN74ALVCH16823 equivalent, this device is critical for low-voltage, high-density bus buffering, I/O port expansion, and bidirectional data latching where bus-hold elimination of external pullups and 3-state drive capability are required.
Technical Context
The SN74ALVCH16823 implements dual 9-bit positive-edge-triggered D-type flip-flops with independent clock-enable (CLKEN), clear (CLR), and output-enable (OE) controls per section. Each section's outputs enter high-impedance state when OE is high, regardless of clock or data activity - enabling live-bus retention and hot-swap compatibility.
Its EPIC™ submicron CMOS process delivers rail-to-rail input thresholds (VIH/VIL scaling with VCC), ±24 mA output drive at 3 V, and bus-hold circuitry that maintains valid logic levels on floating inputs without external resistors - reducing BOM count and layout complexity in memory interfaces and FPGA I/O bridging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - enables interoperability across 1.8-V, 2.5-V, and 3.3-V logic domains without level shifters. |
| Output Drive | ±24 mA at 3 V - sufficient to drive 50-Ω transmission lines or 30-pF loads directly, eliminating buffer stages in compact PCB layouts. |
| Max Clock Frequency | 250 MHz at VCC = 3.3 V - supports high-throughput data capture in DDR-adjacent control paths and address latching. |
| Propagation Delay | 3.5 ns typical (CLK to Q, VCC = 3.3 V) - ensures tight timing margins in synchronous bus architectures with <10-ns cycle budgets. |
| Bus-Hold Current | ±75 µA at VCC = 3 V - actively sustains input logic states during signal transitions or disconnection, preventing metastability in unpopulated slots. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems including motor control I/O modules and programmable logic carriers. |
| I/O Capacitance | 6.5 pF (data inputs), 7 pF (outputs) - minimizes capacitive loading on shared buses, preserving signal integrity in dense backplane routing. |
Pinout & Package
TSSOP-56 (DGG) package: 12.0 mm × 6.1 mm × 1.2 mm body, 0.5-mm pitch, lead-free NiPdAu finish, MSL Level-1 (260°C reflow unlimited).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1CLR, 2CLR | Asynchronous Clear Input | Active-low reset forcing Q outputs low independently of clock - essential for power-on initialization and fault recovery. |
| 1OE, 2OE | Output Enable Input | Active-low control placing corresponding 9-bit outputs in high-Z - enables time-multiplexed bus sharing without contention. |
| 1CLKEN, 2CLKEN | Clock Enable Input | Active-low gate disabling clock path to flip-flop core - allows latch-and-hold behavior without clock stopping. |
| 1CLK, 2CLK | Clock Input | Positive-edge-triggered sampling of D inputs - synchronized data capture aligned to system timing reference. |
| 1D1–1D9, 2D1–2D9 | Data Inputs | Bus-hold enabled - eliminates need for external pullup/pulldown resistors on unused or unterminated lines. |
| 1Q1–1Q9, 2Q1–2Q9 | 3-State Outputs | Driven high/low or tri-stated under OE control - supports bidirectional data flow and load isolation in multi-drop configurations. |
| VCC, GND | Power Supply | Multiple distributed VCC/GND pairs (12 total pins) - reduces simultaneous switching noise and improves PSRR in high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input thresholds | VIH/VIL scale with VCC (e.g., VIH = 0.65×VCC at 1.65 V) - guarantees reliable logic detection across full supply range without threshold mismatch. |
| Integrated bus-hold | Eliminates external 10-kΩ pullup/pulldown resistors on all 18 data inputs - saves 36 passives and 72 mm² board area in 1U server management modules. |
| Independent section control | Separate CLKEN, CLR, and OE per 9-bit bank - enables asymmetric timing (e.g., staggered latch windows) in multi-channel sensor aggregation. |
| High-drive 3-state outputs | ±24 mA drive at 3 V with 7-pF output capacitance - drives 50-Ω traces or 30-pF loads directly, avoiding fanout bottlenecks in FPGA-to-ASIC interconnects. |
| Low quiescent current | 40 µA ICC at 3.6 V - reduces standby power in always-on industrial controllers where >100k units/year require sub-100-µA sleep modes. |
Applications
| Industrial PLC Backplane Interface | FPGA I/O Expansion Module |
|---|---|
Use Scenario: Interfacing FPGA GPIO banks to legacy 18-bit parallel I/O cards in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional bus transceiver with clocked latching and 3-state isolation between FPGA fabric and field-side peripherals. Use Value: Bus-hold prevents floating inputs during FPGA configuration gaps; 250-MHz clock support matches FPGA I/O toggle rates without added logic. |
Use Scenario: Extending limited FPGA I/O count to drive multiple ADCs, DACs, and digital isolators in test equipment. IC Role / Device Role / Timing Role: Synchronized input capture and output staging register with independent enable per channel group. Use Value: Dual 9-bit sections allow time-aligned sampling of two sensor clusters; OE control enables dynamic bus reassignment without FPGA reconfiguration. |
| Memory-Mapped Peripheral Bridge | Automotive Body Control Unit |
Use Scenario: Glue logic between microcontroller parallel bus and external SRAM or flash memory with parity support. IC Role / Device Role / Timing Role: Address/data latch with parity bit handling via dedicated 9-bit sections and asynchronous clear for error recovery. Use Value: 3.5-ns tpd meets 25-ns SRAM access timing; bus-hold maintains valid address during microcontroller interrupt latency. |
Use Scenario: Driving multiplexed LED displays, relay drivers, and LIN transceiver control lines in vehicle body electronics. IC Role / Device Role / Timing Role: Robust I/O expander with ESD-hardened inputs (2-kV HBM) and latch-up immunity (>250 mA) for harsh automotive environments. Use Value: –40°C to +85°C rating ensures reliability in under-hood ECUs; 1.65-V minimum VCC supports battery brownout operation down to 9 V. |
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 |
|---|---|---|---|
| SN74ALVCH162244DGGR | Octal non-inverting buffer (no flip-flop functionality); no clock, CLR, or CLKEN - only 3-state drive. | Suitable for static bus driving only; cannot replace clocked latching or data synchronization roles. | Select only when timing-critical storage is handled elsewhere (e.g., by MCU internal registers). |
| SN74LVC16373ADGGR | 16-bit transparent latch (not edge-triggered); identical 56-pin TSSOP but lacks bus-hold and has higher VCC min (1.65 V vs. 1.65 V - same), lower drive (±24 mA vs. ±24 mA - same), but no CLKEN. | Requires continuous clock enable management; unsuitable for applications needing gated clock hold without external logic. | Prefer SN74ALVCH16823 when clock-enable gating or bus-hold on all inputs is mandatory. |
Compared with SN74ALVCH162244DGGR and SN74LVC16373ADGGR, the SN74ALVCH16823 uniquely combines edge-triggered storage, per-section clock-enable, and integrated bus-hold - making it irreplaceable in applications requiring glitch-free latching, floating-input resilience, and dynamic bus partitioning without added discrete logic.
Availability
SN74ALVCH16823 is available at Aetrix Electronics and suitable for industrial PLC backplanes, FPGA I/O expansion modules, memory-mapped peripheral bridges, and automotive body control units requiring stable component supply across extended product lifecycles.
Supply support for SN74ALVCH16823 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 over 90 years of innovation in industrial, automotive, and communications markets.
The SN74ALVCH16823 belongs to TI's Widebus™ family of high-speed, low-voltage interface ICs - engineered specifically for robust, space-efficient bus buffering and latching in noise-sensitive, high-density digital systems.
FAQ
What is the minimum VCC required for reliable operation of the SN74ALVCH16823?
The SN74ALVCH16823 is fully specified from 1.65 V to 3.6 V. At 1.65 V, it maintains guaranteed setup/hold times (tsu = 1.6 ns, th = 0.5 ns), output drive (±4 mA), and bus-hold functionality - enabling use in battery-powered systems with deep discharge tolerance down to 9 V supply rails via LDO regulation.
Does the SN74ALVCH16823 support hot insertion into a live bus?
Yes. The SN74ALVCH16823 supports hot insertion due to its 3-state outputs controlled by OE, bus-hold on all data inputs, and ESD protection exceeding 2000 V HBM. When OE is held high during insertion, outputs remain high-impedance while bus-hold prevents floating inputs - eliminating glitches or contention on powered-backplane systems.
How does the bus-hold feature eliminate external resistors in the SN74ALVCH16823?
The SN74ALVCH16823 integrates active bus-hold circuitry on all 18 data inputs, providing ±75 µA holding current at 3 V to maintain last-valid logic state. This replaces up to 18 external 10-kΩ pullup/pulldown resistors - reducing BOM cost, PCB area, and potential solder-joint failure points in high-reliability industrial assemblies.
Can the SN74ALVCH16823 be used as a single 18-bit register or only as two 9-bit sections?
The SN74ALVCH16823 can operate flexibly as either two independent 9-bit registers (using separate 1CLK/1CLKEN/1CLR/1OE and 2CLK/2CLKEN/2CLR/2OE) or as a unified 18-bit register by tying corresponding control signals together. Pin mapping and timing parameters are validated for both configurations in TI's SCES038F datasheet.
What is the thermal performance of the SN74ALVCH16823 in the DGG package?
In the 56-pin TSSOP (DGG) package, the SN74ALVCH16823 has a junction-to-ambient thermal impedance (θJA) of 81°C/W. At maximum rated 24-mA output current per pin and 3.6-V supply, worst-case power dissipation remains below 120 mW - ensuring safe operation without heatsinking in enclosed industrial enclosures up to +70°C ambient.
SN74ALVCH16823DGGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVCH
- Package/Case:
- 56-TFSOP (0.240", 6.10mm 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:
- 250 MHz
- Max Propagation Delay @ V, Max CL:
- 3.5ns @ 3.3V, 30pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Current - Quiescent (Iq):
- 40 µA
- Input Capacitance:
- 4.5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-TSSOP
SN74ALVCH16823DGGR FAQ
1.How can I place an order for SN74ALVCH16823DGGR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVCH16823DGGR 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 SN74ALVCH16823DGGR reliable?
The price and inventory of SN74ALVCH16823DGGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVCH16823DGGR is usually 5 days.
3.What payment methods are accepted for SN74ALVCH16823DGGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVCH16823DGGR transactions.
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4.How is shipping managed for SN74ALVCH16823DGGR?
SN74ALVCH16823DGGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVCH16823DGGR 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 SN74ALVCH16823DGGR?
For technical support, including SN74ALVCH16823DGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVCH16823DGGR requirements.
6.How does Aetrix verify that SN74ALVCH16823DGGR is sourced from the original manufacturer or authorized distributors?
All SN74ALVCH16823DGGR 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 SN74ALVCH16823DGGR meets industry standards.
7.What is the process for return or replacement of SN74ALVCH16823DGGR?
All SN74ALVCH16823DGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCH16823DGGR, 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 SN74ALVCH16823DGGR part is unused and in its original packaging.
Return procedure for SN74ALVCH16823DGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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