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Home > Products > Integrated Circuits (ICs) > Logic > Flip Flops

Texas Instruments SN74ALVCH16823DGVR

Name: SN74ALVCH16823DGVR
Brand: Texas Instruments
SKU: SN74ALVCH16823DGVR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ALVCH16823DGVR

Manufacturer:: Texas Instruments

Category:: Flip Flops

Package:: 56-TFSOP (0.173", 4.40mm Width)

Datasheet:: SN74ALVCH16823DGVR.pdf

Description:: IC FF D-TYPE DUAL 9BIT 56TVSOP

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Product details

Overview

SN74ALVCH16823DGVR 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 V_CC operation. It features dual 9-bit sections (1CLK/1D–1Q and 2CLK/2D–2Q), independent clock-enable (CLKEN) and clear (CLR) controls per section, bus-hold on all data inputs, and operates across –40°C to 85°C. It is used in high-density I/O buffering, bidirectional bus driving with parity, and working register implementations.

For engineers reviewing the SN74ALVCH16823DGVR datasheet, SN74ALVCH16823DGVR pinout, SN74ALVCH16823DGVR application, or SN74ALVCH16823DGVR equivalent, this page delivers verified functional identity, confirmed 56-pin TVSOP (DGV) package mapping, validated timing parameters (t_su = 1.3 ns @ 2.7 V, f_max = 250 MHz @ 3.3 V), bus-hold behavior, and real-world interface design implications - not generic logic IC summaries.

Technical Context

The SN74ALVCH16823DGVR implements two independent 9-bit positive-edge-triggered D-type flip-flop banks, each with dedicated CLKEN and CLR inputs that operate asynchronously to the clock. Clock-enable functionality disables the clock buffer when high, latching Q outputs regardless of subsequent CLK transitions.

Its 3-state outputs support high-capacitance bus loading with ±24 mA drive capability at 3 V, while bus-hold circuitry eliminates external pullup/pulldown resistors on all 18 data inputs. The device uses TI's EPIC™ submicron CMOS process and meets JESD 17 latch-up (>250 mA) and MIL-STD-883 ESD (>2 kV HBM) specifications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.65 V to 3.6 V - supports mixed-voltage system interfacing (e.g., 1.8 V core ↔ 3.3 V I/O).
Propagation Delay (t_pd)	3.5 ns max @ 3.3 V - enables reliable operation in high-speed digital interfaces up to 250 MHz.
Output Drive (I_OL/I_OH)	±24 mA @ 3 V - sufficient to drive 50-Ω transmission lines or heavily loaded backplanes without external buffers.
Bus-Hold Current	±75 µA @ 3 V - actively retains valid logic states on floating or unterminated data inputs, removing need for discrete resistors.
Operating Temperature	–40°C to +85°C - qualified for industrial-grade embedded control, communications, and computing applications.
Input Capacitance (C_i)	4.5 pF (control), 6.5 pF (data) - low input loading minimizes signal integrity impact on upstream drivers.
Power Dissipation (C_pd)	30 pF @ 3.3 V - enables accurate dynamic power estimation in high-frequency toggle scenarios.

Pinout & Package

SN74ALVCH16823DGVR is packaged in a 56-pin Thin Very Small Outline Package (TVSOP, DGV), 11.4 mm × 4.4 mm × 1.2 mm body, JEDEC MO-194 compliant, with 0.4 mm lead pitch and Q1 pin-1 orientation.

Pin/Terminal	Circuit Role	Design Meaning
1CLR, 2CLR	Asynchronous clear input (active-low)	Forces corresponding 9-bit Q outputs low independently of clock; critical for system reset synchronization.
1OE, 2OE	Output-enable input (active-low)	Places respective 9-bit output banks into high-impedance state; enables shared bus arbitration without affecting internal flip-flop state.
1CLKEN, 2CLKEN	Clock-enable input (active-low)	Disables clock path to associated flip-flop bank when high - provides transparent latch behavior without external gating logic.
1CLK, 2CLK	Positive-edge-triggered clock input	Controls data capture timing for respective 9-bit sections; edge-sensitive operation ensures deterministic setup/hold compliance.
1D1–1D9, 2D1–2D9	Data inputs	All feature integrated bus-hold - prevents floating-input metastability and eliminates external biasing components.
1Q1–1Q9, 2Q1–2Q9	3-state buffered outputs	Drive capability up to ±24 mA supports direct connection to capacitive buses or terminated lines; high-Z state isolates bus segments.
V_CC, GND	Power supply and ground	Multiple distributed V_CC/GND pins (10 total) minimize switching noise and improve power integrity in high-speed operation.

Key Features

Feature	Design Value
Dual 9-bit configurable operation	Supports either two independent 9-bit registers or one consolidated 18-bit register - increases layout flexibility in space-constrained designs.
Integrated bus-hold on all 18 data inputs	Eliminates 18 external pullup/pulldown resistors, reducing BOM count, PCB area, and potential signal integrity degradation from stubs.
Independent clock-enable per section	Enables selective freezing of one 9-bit bank while the other continues clocked operation - useful in multi-channel data alignment or pipeline staging.
High-drive 3-state outputs (±24 mA)	Drives long traces or multiple loads directly, avoiding intermediate buffers and associated propagation delay/jitter in timing-critical paths.
Wide V_CC range (1.65 V–3.6 V)	Interoperates across legacy 3.3 V, modern 1.8 V, and transitional 2.5 V domains - simplifies voltage translation in heterogeneous systems.

Applications

Industrial PLC I/O Expansion	Memory Interface Buffering
Use Scenario: Expanding digital input/output capacity in programmable logic controllers using parallel backplane buses. IC Role / Device Role / Timing Role: Acts as a 18-bit bidirectional bus interface register with asynchronous clear and output enable for safe hot-swap I/O module insertion. Use Value: Bus-hold prevents spurious toggling during connector mating; 3-state outputs allow seamless integration into shared address/data buses without contention.	Use Scenario: Isolating and latching address/data signals between memory controllers and SRAM/Flash devices operating at different voltage levels. IC Role / Device Role / Timing Role: Provides level-shifted, edge-aligned latching of 18-bit memory bus signals with independent clock-enable for burst-mode timing control. Use Value: Wide V_CC range enables direct 1.8 V controller ↔ 3.3 V memory interfacing; t_pd ≤ 3.5 ns maintains tight memory access timing budgets.
Communications Backplane Register	FPGA I/O Expansion Bridge
Use Scenario: Implementing fault-tolerant register stages in telecom line-card backplanes where signal integrity and hot-swap resilience are critical. IC Role / Device Role / Timing Role: Functions as a 18-bit synchronous latch with independent OE/CLR per bank to manage redundant data paths and isolate failed segments. Use Value: ±24 mA drive sustains signal integrity over 10+ inch FR4 traces; asynchronous CLR enables rapid fault recovery without clock dependency.	Use Scenario: Extending FPGA GPIO count for sensor aggregation or peripheral control in edge-computing gateways with limited native I/O. IC Role / Device Role / Timing Role: Serves as a 18-bit parallel I/O expander with bus-hold inputs and 3-state outputs, synchronized to FPGA clock domains via CLKEN gating. Use Value: Eliminates 18 external bias resistors; independent clock-enable allows FPGA to pause data capture on one bank while processing results from the other.

Industrial PLC I/O Expansion

Memory Interface Buffering

Use Scenario: Expanding digital input/output capacity in programmable logic controllers using parallel backplane buses.

IC Role / Device Role / Timing Role: Acts as a 18-bit bidirectional bus interface register with asynchronous clear and output enable for safe hot-swap I/O module insertion.

Use Value: Bus-hold prevents spurious toggling during connector mating; 3-state outputs allow seamless integration into shared address/data buses without contention.

Use Scenario: Isolating and latching address/data signals between memory controllers and SRAM/Flash devices operating at different voltage levels.

IC Role / Device Role / Timing Role: Provides level-shifted, edge-aligned latching of 18-bit memory bus signals with independent clock-enable for burst-mode timing control.

Use Value: Wide V_CC range enables direct 1.8 V controller ↔ 3.3 V memory interfacing; t_pd ≤ 3.5 ns maintains tight memory access timing budgets.

Communications Backplane Register

FPGA I/O Expansion Bridge

Use Scenario: Implementing fault-tolerant register stages in telecom line-card backplanes where signal integrity and hot-swap resilience are critical.

IC Role / Device Role / Timing Role: Functions as a 18-bit synchronous latch with independent OE/CLR per bank to manage redundant data paths and isolate failed segments.

Use Value: ±24 mA drive sustains signal integrity over 10+ inch FR4 traces; asynchronous CLR enables rapid fault recovery without clock dependency.

Use Scenario: Extending FPGA GPIO count for sensor aggregation or peripheral control in edge-computing gateways with limited native I/O.

IC Role / Device Role / Timing Role: Serves as a 18-bit parallel I/O expander with bus-hold inputs and 3-state outputs, synchronized to FPGA clock domains via CLKEN gating.

Use Value: Eliminates 18 external bias resistors; independent clock-enable allows FPGA to pause data capture on one bank while processing results from the other.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 18-bit bus-interface flip-flop applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ALVCH16823DGGR	Identical logic function and AC/DC specs; packaged in 56-pin TSSOP (DGG) with 0.5 mm lead pitch and 1.2 mm height - 0.3 mm wider than DGV.	Suitable for designs where board space permits slightly larger footprint and standard TSSOP reflow profiles are preferred.	Select DGGR if existing assembly lines are optimized for TSSOP; choose DGVR for tighter pitch constraints and TVSOP-specific thermal profile compatibility.
SN74ALVCH16823DLR	Same electrical behavior but in 56-pin SSOP (DL) package with 0.65 mm pitch and 2.0 mm height - significantly taller and less dense than DGV.	Better suited for prototyping or low-volume production where hand-soldering or legacy SSOP tooling is used.	Prefer DLR only when TVSOP/TSSOP placement equipment is unavailable; avoid in high-density or thermally constrained layouts due to height and thermal impedance.

Compared with SN74ALVCH16823DGGR and SN74ALVCH16823DLR, the SN74ALVCH16823DGVR offers the smallest footprint (4.4 mm width) and lowest profile (1.2 mm), enabling higher routing density and improved thermal performance in compact industrial and communications modules - without sacrificing timing, drive strength, or bus-hold functionality.

Availability

SN74ALVCH16823DGVR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, memory interface buffering, communications backplane register, and FPGA I/O expansion bridge applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for SN74ALVCH16823DGVR 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 expertise in high-reliability interface and timing products.

The SN74ALVCH16823DGVR belongs to TI's Widebus™ family of advanced bus-interface logic, engineered specifically for high-speed, low-voltage, noise-immune digital interconnect in industrial automation, telecom infrastructure, and computing systems.

FAQ

What is the maximum clock frequency supported by the SN74ALVCH16823DGVR?

The SN74ALVCH16823DGVR supports a maximum clock frequency of 250 MHz under typical conditions (V_CC = 3.3 V ± 0.3 V, C_L = 30 pF). This value is characterized but not production tested per the datasheet. At lower V_CC (e.g., 2.7 V), the guaranteed f_max is 150 MHz across the full temperature range. The SN74ALVCH16823DGVR achieves this performance using TI's EPIC™ submicron CMOS process and optimized internal clock buffering.

Does the SN74ALVCH16823DGVR require external pullup or pulldown resistors on its data inputs?

No, the SN74ALVCH16823DGVR does not require external pullup or pulldown resistors on any of its 18 data inputs (1D1–1D9, 2D1–2D9) because it integrates active bus-hold circuitry. This feature maintains valid logic levels on unused or floating inputs, eliminating BOM cost and PCB area overhead. The bus-hold current is specified as ±75 µA at 3 V, ensuring robust noise immunity without external components - a key design advantage of the SN74ALVCH16823DGVR.

How does the clock-enable (CLKEN) input function in the SN74ALVCH16823DGVR?

In the SN74ALVCH16823DGVR, each 9-bit section has its own CLKEN input (1CLKEN and 2CLKEN), active-low. When CLKEN is low, the associated flip-flop bank operates normally, capturing D-input data on the rising edge of CLK. When CLKEN is high, the clock buffer is disabled, freezing the Q outputs regardless of further CLK transitions - effectively converting the section into a transparent latch. This behavior is confirmed in the FUNCTION TABLE and applies independently per bank, making the SN74ALVCH16823DGVR highly flexible for staged data capture.

What is the recommended power-up sequence for the SN74ALVCH16823DGVR to ensure high-impedance outputs?

To guarantee high-impedance outputs during power-up or power-down, the OE inputs (1OE and 2OE) of the SN74ALVCH16823DGVR must be held high. TI recommends tying OE to V_CC through a pullup resistor; the minimum resistance is determined by the current-sinking capability of the driving source. This prevents bus contention during supply ramping. The SN74ALVCH16823DGVR's internal circuitry does not auto-tri-state on power-up - explicit OE control is required, and this requirement is explicitly documented in the datasheet's "Output-Enable Input" section.

Is the SN74ALVCH16823DGVR pin-compatible with other members of the ALVCH16xxx family?

No, the SN74ALVCH16823DGVR is not pin-compatible with other ALVCH16xxx devices such as SN74ALVCH162244 or SN74ALVCH16245. Its 56-pin TVSOP (DGV) pinout is unique to the 18-bit dual-9-bit flip-flop configuration, with dedicated CLKEN, CLR, and dual-clock inputs. Pin assignments differ fundamentally - for example, SN74ALVCH162244 has no CLKEN or CLR pins and uses different control signal placement. Always verify against the specific SN74ALVCH16823DGVR pin diagram; no cross-family pin compatibility is claimed or supported.

SN74ALVCH16823DGVR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ALVCH

Package/Case:: 56-TFSOP (0.173", 4.40mm 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-TVSOP

SN74ALVCH16823DGVR FAQ

1.How can I place an order for SN74ALVCH16823DGVR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ALVCH16823DGVR 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 SN74ALVCH16823DGVR reliable?

The price and inventory of SN74ALVCH16823DGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVCH16823DGVR is usually 5 days.

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Once your SN74ALVCH16823DGVR 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 SN74ALVCH16823DGVR?

For technical support, including SN74ALVCH16823DGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVCH16823DGVR requirements.

6.How does Aetrix verify that SN74ALVCH16823DGVR is sourced from the original manufacturer or authorized distributors?

All SN74ALVCH16823DGVR 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 SN74ALVCH16823DGVR meets industry standards.

7.What is the process for return or replacement of SN74ALVCH16823DGVR?

All SN74ALVCH16823DGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCH16823DGVR, 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 SN74ALVCH16823DGVR part is unused and in its original packaging.

Return procedure for SN74ALVCH16823DGVR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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