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Nexperia USA Inc. 74ALVT162821DL,512
- Part No.:
- 74ALVT162821DL,512
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74ALVT162821DL,512.pdf
- Description:
- IC FF D-TYPE DUAL 10BIT 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,511
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Product details
Overview
74ALVT162821DL,512 from Nexperia is a 20-bit positive-edge-triggered D-type flip-flop with integrated 30 Ω series output termination resistors, dual independent 10-bit sections (1CP/1OE and 2CP/2OE), 3-state outputs, bus-hold inputs, and operation across 2.3 V to 3.6 V supply. It functions as a high-speed bus interface register in memory address/data latching and backplane buffering applications.
For engineers reviewing the 74ALVT162821DL,512 datasheet, 74ALVT162821DL,512 pinout, 74ALVT162821DL,512 application, or 74ALVT162821DL,512 equivalent, key selection criteria include propagation delay (≤5.0 ns at 3.3 V), 30 Ω on-die termination eliminating external resistors, ±12 mA drive strength, -40 °C to +85 °C industrial temperature range, and TSSOP56 package compatibility with high-density PCB layouts.
Technical Context
This device implements two independent 10-bit D-type registers, each controlled by its own clock (1CP/2CP) and output enable (1OE/2OE), enabling flexible partitioning of the 20-bit bus. Each section operates synchronously on the rising edge of its respective clock, with set-up time as low as 0.1 ns and hold time down to -0.1 ns at 3.3 V.
Bus-hold circuitry maintains valid logic states on unused data inputs without external pull-ups, while IOFF protection ensures low leakage during partial power-down. The 30 Ω series resistor per output minimizes signal reflections on transmission lines up to 5 V, supporting direct interfacing with TTL and 5 V buses without current loading.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 20-bit positive-edge-triggered D-type flip-flop with dual 10-bit sections |
| Supply Voltage | 2.3 V to 3.6 V - supports mixed-voltage system interfacing and low-power operation |
| Propagation Delay | 3.2 ns typical (tPLH/tPHL at VCC = 3.3 V) - enables reliable operation up to 150 MHz clock frequency |
| Output Drive | ±12 mA - sufficient to drive terminated 50 Ω transmission lines and multiple TTL loads |
| Input Clamping | Overvoltage tolerant to 5.5 V - allows safe interfacing with 5 V logic without level shifters |
| Termination | Integrated 30 Ω series resistor per output - eliminates need for 20 discrete external termination resistors |
| Operating Temperature | -40 °C to +85 °C - qualified for industrial-grade embedded and communications equipment |
| Bus Hold | Active on all data inputs - prevents floating inputs and eliminates external pull-up/pull-down components |
Pinout & Package
TSSOP56 plastic thin shrink small outline package (SOT364-1), 56-pin, body width 6.1 mm, 0.5 mm pitch, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1CP, 2CP | Clock input (rising-edge trigger) | Controls latching of corresponding 10-bit D-input group; asynchronous reset not supported |
| 1OE, 2OE | Output enable (active LOW) | Independently places associated 10-bit outputs into high-impedance state; no effect on internal register state |
| 1D0–1D9, 2D0–2D9 | Data inputs | 20 total inputs with bus-hold; tolerate 5.5 V regardless of VCC |
| 1Q0–1Q9, 2Q0–2Q9 | Data outputs | 20 total 3-state outputs, each with integrated 30 Ω series resistor for impedance matching |
| VCC (pins 7, 22, 35, 50) | Power supply | Four distributed supply pins reduce switching noise and improve power integrity |
| GND (pins 4, 11, 18, 25, 32, 39, 46, 53) | Ground reference | Eight ground pins minimize ground bounce and support high-speed signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 10-bit sections | Enables asymmetric bus partitioning - e.g., 10-bit address latch + 10-bit data latch sharing one IC |
| On-die 30 Ω output termination | Eliminates 20 external resistors, reduces BOM count, PCB area, and signal integrity risk |
| Bus-hold on all data inputs | Maintains defined logic state on unconnected or unterminated inputs - removes need for 20 pull-up/down resistors |
| IOFF partial power-down | Prevents current flow through powered-off outputs when VCC = 0 V - critical for hot-swap and live insertion |
| 5 V tolerant inputs | Direct connection to legacy 5 V logic without level translators - simplifies mixed-voltage board design |
| Power-up 3-state and reset | Outputs remain high-impedance until VCC stabilizes - prevents bus contention during power sequencing |
Applications
| Memory Address Latching | Backplane Data Buffering |
|---|---|
Use Scenario: Capturing and holding CPU address bus signals before routing to DRAM or Flash memory controllers. IC Role / Device Role / Timing Role: Synchronous address register with precise setup/hold timing (tsu = 0.1 ns, th = 0.1 ns at 3.3 V) and low skew between bits. Use Value: Eliminates external termination and pull-up components while ensuring clean, reflection-free address strobes at >100 MHz. |
Use Scenario: Isolating and driving parallel data paths across modular backplanes in telecom line cards or industrial PLCs. IC Role / Device Role / Timing Role: Bidirectional bus interface with independent 10-bit control - one section for upstream, one for downstream data. Use Value: Integrated 30 Ω termination and ±12 mA drive ensure signal integrity over 15 cm FR4 traces without external compensation. |
| Hot-Swappable Module Interface | Legacy System Bus Extension |
Use Scenario: Enabling live insertion/extraction of daughterboards in carrier systems where bus contention must be avoided during plug/unplug events. IC Role / Device Role / Timing Role: 3-state buffer with IOFF circuitry - outputs float safely when VCC is absent or unstable. Use Value: Prevents back-driving of powered bus segments and meets IEC 61000-4-2 ESD robustness (2000 V HBM) for field-replaceable units. |
Use Scenario: Interfacing modern 3.3 V microcontrollers with older 5 V peripheral buses (e.g., ISA, PC/104, or custom parallel interfaces). IC Role / Device Role / Timing Role: Level-tolerant bus transceiver - accepts 5 V inputs while operating from 3.3 V supply and driving 5 V-tolerant loads. Use Value: Removes need for discrete level shifters or voltage translators, reducing latency and component count in brownfield upgrades. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 20-bit bus interface register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALVTH162821DGGR | TI part; same 20-bit dual-section architecture but uses 24 Ω termination and lacks bus-hold inputs | Requires external pull-ups on unused inputs; slightly lower drive (±8 mA) limits trace length | Choose if TI ecosystem alignment or tighter 24 Ω match to 50 Ω lines is prioritized over bus-hold convenience |
| 74LVC16374APAG | IDT/RENESAS part; 16-bit (not 20-bit), no integrated termination, no bus-hold, but offers lower ICC (20 μA typical) | Insufficient bit width for full 20-bit bus; requires external termination and pull-ups | Consider only for space-constrained 16-bit applications where ultra-low static current outweighs feature loss |
Compared with SN74ALVTH162821DGGR and 74LVC16374APAG, the 74ALVT162821DL,512 uniquely combines 20-bit width, on-die 30 Ω termination, and bus-hold in a single TSSOP56 package - delivering lowest BOM count and highest integration for industrial bus interface designs.
Availability
74ALVT162821DL,512 is available at Aetrix Electronics and suitable for memory subsystems, backplane interconnects, and hot-pluggable module interfaces requiring stable component supply, long-term industrial lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for 74ALVT162821DL,512 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 logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74ALVT family delivers advanced BiCMOS bus-interface devices optimized for high-speed, low-noise, mixed-voltage system interconnection - specifically targeting industrial control, communications infrastructure, and computing peripherals.
FAQ
Does the 74ALVT162821DL,512 support operation at 2.5 V nominal supply?
Yes. The device is fully specified across 2.3 V to 3.6 V, including 2.5 V ±0.2 V operation. At 2.5 V, propagation delay is 4.4 ns typical (tPLH), set-up time is 0.5 ns, and output drive remains ±12 mA - meeting requirements for legacy 2.5 V system buses.
Can unused data inputs be left floating?
No - but they do not require external resistors. All data inputs feature active bus-hold circuitry that maintains the last valid logic state. Leaving them unconnected is electrically safe and functionally correct, eliminating design overhead for pull-up/pull-down networks.
What is the maximum clock frequency supported?
The device supports up to 150 MHz maximum clock frequency (fmax) under recommended operating conditions (VCC = 3.3 V, Tamb = -40 °C to +85 °C), verified by propagation delay (tPLH/tPHL ≤ 5.0 ns) and pulse width (tW ≥ 1.5 ns) specifications.
Is the 74ALVT162821DL,512 pin-compatible with older 74ALV or 74LVT variants?
No. While functionally similar to other 20-bit flip-flops, the 74ALVT162821DL,512 has a unique TSSOP56 (SOT364-1) pinout with eight GND and four VCC pins for noise reduction - differing from SSOP56 or SO56 footprints used by legacy ALV/LVT families. PCB layout is not interchangeable.
74ALVT162821DL,512 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74ALVT
- Package/Case:
- 56-BSSOP (0.295", 7.50mm 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:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 5ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 8mA, 12mA; 12mA, 12mA
- Voltage - Supply:
- 2.3V ~ 2.7V, 3V ~ 3.6V
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- 3 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-SSOP
74ALVT162821DL,512 FAQ
1.How can I place an order for 74ALVT162821DL,512 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ALVT162821DL,512 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 74ALVT162821DL,512 reliable?
The price and inventory of 74ALVT162821DL,512 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVT162821DL,512 is usually 5 days.
3.What payment methods are accepted for 74ALVT162821DL,512?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ALVT162821DL,512 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ALVT162821DL,512?
74ALVT162821DL,512 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ALVT162821DL,512 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 74ALVT162821DL,512?
For technical support, including 74ALVT162821DL,512 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVT162821DL,512 requirements.
6.How does Aetrix verify that 74ALVT162821DL,512 is sourced from the original manufacturer or authorized distributors?
All 74ALVT162821DL,512 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 74ALVT162821DL,512 meets industry standards.
7.What is the process for return or replacement of 74ALVT162821DL,512?
All 74ALVT162821DL,512 units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVT162821DL,512, 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 74ALVT162821DL,512 part is unused and in its original packaging.
Return procedure for 74ALVT162821DL,512:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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