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

NXP Semiconductors 74ALVCH16821DGG:11

Name: 74ALVCH16821DGG:11
Brand: NXP Semiconductors
SKU: 74ALVCH16821DGG:11
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74ALVCH16821DGG:11

Manufacturer:: NXP Semiconductors

Category:: Flip Flops

Package:: 56-TFSOP (0.240", 6.10mm Width)

Datasheet:: 74ALVCH16821DGG:11.pdf

Description:: IC FF D-TYPE DUAL 10BIT 56TSSOP

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Product details

Overview

74ALVCH16821DGG:11 from Nexperia is a 20-bit bus-interface D-type flip-flop with dual 10-bit registers, positive-edge clock triggering, and independent 3-State output control per section. It operates from 1.2 V to 3.6 V, delivers ±24 mA drive at 3.0 V, and features bus hold on all data inputs-enabling robust signal integrity in high-speed industrial bus buffering applications.

For engineers reviewing the 74ALVCH16821DGG:11 datasheet, 74ALVCH16821DGG:11 pinout, 74ALVCH16821DGG:11 application, or 74ALVCH16821DGG:11 equivalent, this page provides verified functional specifications, TSSOP-56 package details, JEDEC 8-1A compliance, propagation delay (2.5 ns @ 3.3 V), and bus hold implementation for floating-input resilience.

Technical Context

The 74ALVCH16821DGG:11 implements two independent edge-triggered 10-bit registers, each with dedicated clock (1CP/2CP) and active-Low output enable (1OE/2OE). Data latching occurs on the Low-to-High transition of each clock, with setup time as low as 0.2 ns and hold time down to –0.3 ns at 3.3 V.

Its 3-State outputs support bidirectional bus interfacing with fast enable/disable times (2.3–5.1 ns), while integrated bus hold circuitry eliminates external pull resistors by sustaining valid logic levels on unused inputs-critical for hot-swap and partial-bus configurations.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	1.2 V to 3.6 V - supports mixed-voltage system interfacing across 1.8 V, 2.5 V, and 3.3 V domains
Propagation Delay (t_PHL/t_PLH)	2.5 ns @ V_CC = 3.3 V, C_L = 50 pF - enables reliable operation up to 350 MHz clock frequency
Output Drive Strength	±24 mA @ 3.0 V - directly drives 50 Ω transmission lines at 85 °C without external buffers
Input Capacitance (C_I)	5.0 pF - minimizes capacitive loading on upstream drivers in dense PCB layouts
Bus Hold Current	±75 µA @ V_CC = 3.0 V - actively maintains logic state on unconnected inputs without external biasing
Power Dissipation Capacitance (C_PD)	33 pF (enabled), 17 pF (disabled) - enables accurate dynamic power estimation in high-frequency switching

Pinout & Package

74ALVCH16821DGG:11 is housed in a 56-pin plastic thin shrink small outline package (TSSOP), SOT364-1, with 6.1 mm body width and –40 °C to +85 °C operating temperature range.

Pin/Terminal	Circuit Role	Design Meaning
1, 28	1OE, 2OE	Active-Low output enable controls 10-bit output sections independently - allows selective bus isolation
56, 29	1CP, 2CP	Positive-edge clock inputs - trigger simultaneous latching of 10-bit data groups on rising edge
55–43, 42–30	1D0–1D9, 2D0–2D9	Data inputs with integrated bus hold - prevent floating states without external resistors
2–14, 15–27	1Q0–1Q9, 2Q0–2Q9	3-State outputs - high-impedance OFF state enables shared bus arbitration
4, 11, 18, 25, 32, 39, 46, 53	GND	Multiple ground pins - reduce ground bounce and improve noise immunity in high-speed switching
7, 22, 35, 50	V_CC	Multiple supply pins - lower inductance and stabilize V_CC during simultaneous output transitions

Key Features

Feature	Design Value
MULTIBYTE™ flow-through pinout	Standardized input-output alignment across 56-pin TSSOP - simplifies PCB routing and reduces trace skew
JEDEC 8-1A compliance	Guarantees interoperability with industry-standard 3.3 V LVTTL and LVCMOS interfaces
Low-inductance power/ground layout	Eight V_CC and eight GND pins - suppress simultaneous switching noise in 20-bit parallel paths
Bus hold on all data inputs	Eliminates need for 20 external pull-up/down resistors - reduces BOM count and board area

Applications

Industrial PLC Backplane	Automotive Body Control Module
Use Scenario: Bidirectional data transfer between microcontroller and peripheral I/O expanders over a 20-bit parallel bus in a noisy factory environment. IC Role / Device Role / Timing Role: Bus-interface D-type flip-flop providing synchronized latching and 3-State isolation to prevent contention during read/write cycles. Use Value: ±24 mA drive strength ensures clean signal edges into 50 Ω traces; bus hold prevents glitches from unterminated stubs during hot-plug events.	Use Scenario: Level-shifting and buffering between 3.3 V MCU and legacy 5 V-compatible sensor interface modules in vehicle door control units. IC Role / Device Role / Timing Role: Voltage-tolerant bus transceiver with independent register sections enabling asynchronous data capture from multiple sensors. Use Value: 1.2–3.6 V supply range allows direct connection to 3.3 V rails; JEDEC 8-1A compliance guarantees safe interfacing with 5 V-tolerant inputs.
Computing Memory Expansion Card	Wearable Device Sensor Hub
Use Scenario: Expanding GPIO count on a compact x86-based single-board computer via parallel memory-mapped I/O expansion slot. IC Role / Device Role / Timing Role: Dual 10-bit latch with independent OE control - enables separate read and write data path management on shared bus lines. Use Value: 2.5 ns propagation delay supports >300 MHz bus timing margins; MULTIBYTE™ pinout minimizes trace length mismatch across 20-bit data path.	Use Scenario: Aggregating digital outputs from multiple inertial and environmental sensors onto a low-power ARM Cortex-M0+ host processor. IC Role / Device Role / Timing Role: Low-voltage (1.8 V capable) bus interface flip-flop synchronizing burst-mode sensor data reads before SPI transmission. Use Value: 5.0 pF input capacitance reduces loading on high-impedance sensor outputs; CMOS low power consumption extends battery life in always-on monitoring mode.

Industrial PLC Backplane

Automotive Body Control Module

Use Scenario: Bidirectional data transfer between microcontroller and peripheral I/O expanders over a 20-bit parallel bus in a noisy factory environment.

IC Role / Device Role / Timing Role: Bus-interface D-type flip-flop providing synchronized latching and 3-State isolation to prevent contention during read/write cycles.

Use Value: ±24 mA drive strength ensures clean signal edges into 50 Ω traces; bus hold prevents glitches from unterminated stubs during hot-plug events.

Use Scenario: Level-shifting and buffering between 3.3 V MCU and legacy 5 V-compatible sensor interface modules in vehicle door control units.

IC Role / Device Role / Timing Role: Voltage-tolerant bus transceiver with independent register sections enabling asynchronous data capture from multiple sensors.

Use Value: 1.2–3.6 V supply range allows direct connection to 3.3 V rails; JEDEC 8-1A compliance guarantees safe interfacing with 5 V-tolerant inputs.

Computing Memory Expansion Card

Wearable Device Sensor Hub

Use Scenario: Expanding GPIO count on a compact x86-based single-board computer via parallel memory-mapped I/O expansion slot.

IC Role / Device Role / Timing Role: Dual 10-bit latch with independent OE control - enables separate read and write data path management on shared bus lines.

Use Value: 2.5 ns propagation delay supports >300 MHz bus timing margins; MULTIBYTE™ pinout minimizes trace length mismatch across 20-bit data path.

Use Scenario: Aggregating digital outputs from multiple inertial and environmental sensors onto a low-power ARM Cortex-M0+ host processor.

IC Role / Device Role / Timing Role: Low-voltage (1.8 V capable) bus interface flip-flop synchronizing burst-mode sensor data reads before SPI transmission.

Use Value: 5.0 pF input capacitance reduces loading on high-impedance sensor outputs; CMOS low power consumption extends battery life in always-on monitoring mode.

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
SN74ALVCH16821DGGR	Same function, pinout, and electrical specs; TI-manufactured TSSOP-56 variant with identical AC/DC characteristics	No functional deviation - validated for drop-in replacement in existing designs using TI's qualification flow	Select when sourcing from TI-authorized channels or requiring TI-specific reliability reporting
74LVC16374ADGG	16-bit (not 20-bit); no bus hold; 3.3 V only (1.65–3.6 V); slightly higher t_PHL (3.1 ns)	Suitable for space-constrained 16-bit buses where bus hold is managed externally or unnecessary	Choose only if 20-bit width is not required and external pull resistors are acceptable

Compared with SN74ALVCH16821DGGR, the 74ALVCH16821DGG:11 offers identical functionality but originates from Nexperia's qualified production line; versus 74LVC16374ADGG, it provides 4 additional bits, integrated bus hold, and tighter timing-making it superior for noise-prone, full-width industrial bus applications.

Availability

74ALVCH16821DGG:11 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, and computing memory expansion cards requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.

Supply support for 74ALVCH16821DGG:11 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete, logic, and PowerMOS devices for automotive, industrial, and computing markets.

The 74ALVCH16821DGG:11 belongs to Nexperia's advanced ALVC logic family, engineered specifically for low-voltage, high-speed bus interfacing with robust noise immunity and minimal external component count.

FAQ

What is the maximum clock frequency supported by the 74ALVCH16821DGG:11?

The 74ALVCH16821DGG:11 supports a maximum clock frequency of 350 MHz under recommended conditions: V_CC = 3.3 V ± 0.3 V, C_L = 50 pF, and T_amb = 25 °C. At 2.5 V supply, the max frequency drops to 250 MHz. These values are measured with specified input rise/fall times and load conditions per the official Nexperia datasheet.

Does the 74ALVCH16821DGG:11 include bus hold functionality, and how does it operate?

Yes, the 74ALVCH16821DGG:11 integrates bus hold circuitry on all 20 data inputs (1D0–1D9 and 2D0–2D9). It actively sustains the last-valid logic level with ±75 µA hold current at 3.0 V, eliminating the need for external pull-up or pull-down resistors. This feature is enabled by default and requires no configuration.

What package type and pin count does the 74ALVCH16821DGG:11 use?

The 74ALVCH16821DGG:11 uses a 56-pin plastic thin shrink small outline package (TSSOP), designated SOT364-1, with 6.1 mm body width. It is distinct from the SSOP variant (SOT371-1) and shares pin compatibility only within the same package family.

Can the 74ALVCH16821DGG:11 interface directly with 5 V TTL logic?

The 74ALVCH16821DGG:11 is not 5 V tolerant on inputs or outputs. Its absolute maximum input voltage is V_CC + 0.5 V, and it complies with JEDEC 8-1A for 3.3 V systems. Direct connection to 5 V TTL requires level-shifting circuitry or a compatible 5 V–tolerant variant such as the 74ALVCH16821DL (SSOP) used in legacy NXP designs.

What is the propagation delay from clock to output for the 74ALVCH16821DGG:11?

The 74ALVCH16821DGG:11 exhibits a typical propagation delay (t_PHL/t_PLH) of 2.5 ns when operated at V_CC = 3.3 V with a 50 pF load. The maximum delay under worst-case conditions is 4.5 ns. This value is measured from the 50 % point of the clock input to the 50 % point of the Q output transition.

74ALVCH16821DGG:11 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: 74ALVCH

Package/Case:: 56-TFSOP (0.240", 6.10mm Width)

Packaging:: Tube

Product Status:: Obsolete

Function:: Standard

Type:: D-Type

Output Type:: Tri-State, Non-Inverted

Number of Elements:: 2

Number of Bits per Element:: 10

Clock Frequency:: 350 MHz

Max Propagation Delay @ V, Max CL:: 4.5ns @ 3.3V, 50pF

Trigger Type:: Positive Edge

Current - Output High, Low:: 24mA, 24mA

Voltage - Supply:: 2.3V ~ 2.7V, 3V ~ 3.6V

Current - Quiescent (Iq):: 40 µA

Input Capacitance:: 5 pF

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-TSSOP

74ALVCH16821DGG:11 FAQ

1.How can I place an order for 74ALVCH16821DGG:11 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74ALVCH16821DGG:11 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 74ALVCH16821DGG:11 reliable?

The price and inventory of 74ALVCH16821DGG:11 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVCH16821DGG:11 is usually 5 days.

3.What payment methods are accepted for 74ALVCH16821DGG:11?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ALVCH16821DGG:11 transactions.

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4.How is shipping managed for 74ALVCH16821DGG:11?

74ALVCH16821DGG:11 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74ALVCH16821DGG:11 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 74ALVCH16821DGG:11?

For technical support, including 74ALVCH16821DGG:11 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVCH16821DGG:11 requirements.

6.How does Aetrix verify that 74ALVCH16821DGG:11 is sourced from the original manufacturer or authorized distributors?

All 74ALVCH16821DGG:11 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 74ALVCH16821DGG:11 meets industry standards.

7.What is the process for return or replacement of 74ALVCH16821DGG:11?

All 74ALVCH16821DGG:11 units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVCH16821DGG:11, 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 74ALVCH16821DGG:11 part is unused and in its original packaging.

Return procedure for 74ALVCH16821DGG:11:

1.Submit a request within 90 days.

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

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