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Nexperia USA Inc. 74ALVCH16821DGGS
- Part No.:
- 74ALVCH16821DGGS
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74ALVCH16821DGGS.pdf
- Description:
- IC FF D-TYPE DUAL 10BIT 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,474
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Product details
Overview
74ALVCH16821DGGS from Nexperia is a 20-bit bus-interface D-type flip-flop with dual 10-bit edge-triggered registers, positive-edge clocking, 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 integrates bus-hold circuitry eliminating external pull resistors. It is used in high-density data path buffering and level translation between mixed-voltage logic domains in industrial control backplanes.
For engineers reviewing the 74ALVCH16821DGGS datasheet, 74ALVCH16821DGGS pinout, 74ALVCH16821DGGS application, or 74ALVCH16821DGGS equivalent, key selection criteria include its dual-section independent enable timing, TSSOP56 package thermal performance, bus-hold input robustness, and guaranteed 350 MHz operation at 3.3 V with 50 pF load.
Technical Context
This device implements two fully independent 10-bit D-flip-flop sections (Section 1: pins 1D0–1D9/1Q0–1Q9; Section 2: 2D0–2D9/2Q0–2Q9), each with dedicated rising-edge clock (1CP/2CP) and active-low output enable (1OE/2OE). The bus-hold circuitry actively maintains valid logic levels on all 20 data inputs without external components.
Its MULTIBYTE™ flow-through pinout minimizes signal skew across byte lanes, while low-inductance multiple VCC/GND pins suppress ground bounce. The function table confirms that output enable state has no effect on internal register storage-only output impedance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Type | 20-bit dual-section D-type flip-flop with 3-state outputs |
| Supply Voltage Range | 1.2 V to 3.6 V - supports direct interface with 1.2 V, 1.8 V, 2.5 V, and 3.3 V logic families |
| Max Clock Frequency | 350 MHz at VCC = 3.3 V, CL = 50 pF - enables high-speed data latching in DDR-adjacent interfaces |
| Output Drive | ±24 mA at VCC = 3.0 V - drives 50 Ω transmission lines directly without external buffers |
| Propagation Delay | 4.5 ns max (tpd) at VCC = 3.0–3.6 V - ensures tight timing margins in synchronous bus designs |
| Bus-Hold Current | ±75 μA typical at VCC = 3.0 V - maintains stable logic states on floating inputs without pull resistors |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial-grade embedded systems and communications equipment |
Pinout & Package
TSSOP56 plastic thin shrink small outline package (SOT364-1); 56-pin, 6.1 mm body width; 1.2 mm max height; lead pitch 0.5 mm; RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1CP (pin 56), 2CP (pin 29) | Rising-edge clock input | Triggers simultaneous capture of all 10 bits in respective section on LOW-to-HIGH transition |
| 1OE (pin 1), 2OE (pin 28) | Active-low output enable | Controls 3-state output drivers independently; HIGH disables outputs without affecting register state |
| 1D0–1D9 (pins 55,54,52,51,49,48,47,45,44,43), 2D0–2D9 (pins 42,41,40,38,37,36,34,33,31,30) | Data inputs | All 20 inputs feature integrated bus-hold; eliminate need for external pull-up/down resistors |
| 1Q0–1Q9 (pins 2,3,5,6,8,9,10,12,13,14), 2Q0–2Q9 (pins 15,16,17,19,20,21,23,24,26,27) | Registered data outputs | 3-state outputs support time-multiplexed bus sharing; drive strength supports 50 Ω line termination |
| VCC (pins 7,22,35,50) | Power supply | Four distributed VCC pins reduce power rail inductance and improve noise immunity |
| GND (pins 4,11,18,25,32,39,46,53) | Ground reference | Eight GND pins minimize ground bounce and ensure stable switching thresholds |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 10-bit registers | Enables asynchronous latching of two separate data streams (e.g., address/data or upper/lower byte) with separate clock and enable control |
| MULTIBYTE™ flow-through pinout | Minimizes trace length mismatch and inter-byte skew in parallel bus layouts; simplifies PCB routing |
| Integrated bus-hold on all inputs | Eliminates 20 external pull resistors, reducing BOM count, board area, and risk of floating node failure |
| Low-inductance multi-VCC/GND architecture | Reduces simultaneous switching noise (SSN) and improves signal integrity in high-speed 20-bit data paths |
| JEDEC-compliant voltage ranges | Meets JESD8-5 (2.3–2.7 V) and JESD8B/JESD36 (2.7–3.6 V) standards for interoperability with legacy and modern logic families |
Applications
| Industrial Backplane Buffering | Memory Interface Level Translation |
|---|---|
|
Use Scenario: Isolating and latching address/data signals between a 3.3 V microcontroller and a 2.5 V FPGA-based peripheral module on a shared backplane. IC Role / Device Role / Timing Role: Dual-section register synchronizes and buffers bidirectional 20-bit data lanes while maintaining voltage domain separation. Use Value: Eliminates external level shifters and pull resistors; ±24 mA drive ensures clean signal integrity over 10 cm backplane traces. |
Use Scenario: Capturing and holding burst-mode read data from a 1.8 V LPDDR2 controller before presenting it to a 3.3 V system management unit. IC Role / Device Role / Timing Role: Acts as a voltage-tolerant, edge-triggered latch enabling safe handoff between disparate memory subsystems. Use Value: Bus-hold prevents metastability during idle cycles; 4.5 ns propagation delay preserves setup/hold timing budgets. |
| Programmable Logic I/O Expansion | Test Equipment Signal Conditioning |
|
Use Scenario: Expanding GPIO count on a CPLD by latching parallel configuration data from a host MCU before driving high-capacitance test fixtures. IC Role / Device Role / Timing Role: Provides registered, 3-state-controlled I/O expansion with independent enable per 10-bit group. Use Value: Independent 1OE/2OE allows dynamic partitioning of I/O banks; 350 MHz max clock supports fast reconfiguration sequences. |
Use Scenario: Synchronizing and conditioning 20-bit analog-to-digital converter (ADC) output streams in automated test equipment before digitization. IC Role / Device Role / Timing Role: Edge-triggered register captures ADC samples with precise timing alignment and drives long cables via 50 Ω-terminated outputs. Use Value: Output drive capability eliminates external line drivers; low propagation delay (<5 ns) preserves sample timing accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 20-bit bus-interface flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALVCH16821DGGR | Same die, identical electrical specs, but green RoHS-compliant TSSOP56 package (SOT364-1) with matte tin finish | No functional difference; used where lead-free finish and JEDEC-compliant marking are required | Select when RoHS compliance and IPC/JEDEC-standard surface finish are mandatory for assembly |
| 74LVC16374ADGG | 20-bit dual D-flip-flop with 3-state outputs, but lacks bus-hold; max VCC = 3.6 V only; lower drive (±24 mA at 3.3 V, not 3.0 V) | Requires external pull resistors on unused inputs; less robust in noisy industrial environments | Choose only if bus-hold is unnecessary and cost sensitivity outweighs design-in simplicity and noise immunity |
Compared with SN74ALVCH16821DGGR, the 74ALVCH16821DGGS offers identical functionality but may differ in marking or plating specification; compared with 74LVC16374ADGG, it provides superior noise immunity via bus-hold and broader voltage flexibility (1.2–3.6 V vs. 1.65–3.6 V), making it more suitable for mixed-supply systems.
Availability
74ALVCH16821DGGS is available at Aetrix Electronics and suitable for industrial backplane buffering, memory interface level translation, programmable logic I/O expansion, and test equipment signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for 74ALVCH16821DGGS 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 delivering high-performance logic, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial, automotive, and consumer applications.
The 74ALVCH series targets high-speed, low-voltage bus interface applications requiring robust noise immunity, wide supply range, and minimal external components-designed specifically for dense, mixed-voltage digital systems.
FAQ
Does the 74ALVCH16821DGGS support hot insertion or live insertion into powered-backplane systems?
No. The device does not include hot-swap protection circuitry. Absolute maximum ratings specify VI input voltage up to VCC + 0.5 V, but sustained overvoltage or current injection during live insertion can exceed clamping limits. External protection (e.g., series resistors, TVS diodes) is required for hot-plug scenarios.
Can both sections operate at different supply voltages simultaneously?
No. The device has a single VCC pin set (four pins tied internally) and one GND reference. All logic and I/O operate from the same supply rail. Mixed-voltage operation requires external level-shifting circuitry between sections or use of separate devices.
What is the impact of bus-hold activation on power consumption during static operation?
Bus-hold draws ±75 μA typical per input at VCC = 3.0 V when held near VIH or VIL thresholds. With all 20 inputs floating, worst-case additional ICC is ~1.5 mA. This is included in the 40 µA max static supply current spec under VI = VCC or GND conditions.
Is the 74ALVCH16821DGGS pin-compatible with older 74ALVCH16821 variants in SSOP56 (SOT371-1) packages?
No. The TSSOP56 (SOT364-1) package has different mechanical dimensions, lead pitch (0.5 mm vs. 0.635 mm), and pin mapping. While logic function and DC/AC specs are identical, PCB layout and footprint are not interchangeable; redesign is required for package substitution.
74ALVCH16821DGGS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74ALVCH
- Package/Case:
- 56-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Bulk
- 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
74ALVCH16821DGGS FAQ
1.How can I place an order for 74ALVCH16821DGGS through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ALVCH16821DGGS 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 74ALVCH16821DGGS reliable?
The price and inventory of 74ALVCH16821DGGS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVCH16821DGGS is usually 5 days.
3.What payment methods are accepted for 74ALVCH16821DGGS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ALVCH16821DGGS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ALVCH16821DGGS?
74ALVCH16821DGGS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ALVCH16821DGGS 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 74ALVCH16821DGGS?
For technical support, including 74ALVCH16821DGGS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVCH16821DGGS requirements.
6.How does Aetrix verify that 74ALVCH16821DGGS is sourced from the original manufacturer or authorized distributors?
All 74ALVCH16821DGGS 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 74ALVCH16821DGGS meets industry standards.
7.What is the process for return or replacement of 74ALVCH16821DGGS?
All 74ALVCH16821DGGS units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVCH16821DGGS, 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 74ALVCH16821DGGS part is unused and in its original packaging.
Return procedure for 74ALVCH16821DGGS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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