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NXP Semiconductors 74ABT16821ADL,512
- Part No.:
- 74ABT16821ADL,512
- Manufacturer:
- NXP Semiconductors
- Category:
- Flip Flops
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74ABT16821ADL,512.pdf
- Description:
- IC FF D-TYPE DUAL 10BIT 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,077
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Product details
Overview
74ABT16821ADL,512 from Nexperia is a 20-bit bus-interface D-type flip-flop with positive-edge triggering and 3-state outputs, implemented in high-performance BiCMOS technology. It integrates two independent 10-bit edge-triggered registers, each with dedicated clock (nCP) and active-LOW output enable (nOE), delivering ±64 mA/−32 mA drive capability for driving heavily loaded buses, MOS memories, or microprocessors in industrial control backplanes.
For engineers reviewing the 74ABT16821ADL,512 datasheet, 74ABT16821ADL,512 pinout, 74ABT16821ADL,512 application, or 74ABT16821ADL,512 equivalent, this device supports high-speed synchronous data latching (fmax = 160 MHz), precise timing control (tPLH/tPHL ≤ 3.7 ns), and robust bus isolation (high-impedance OFF-state) in automotive-grade temperature range (−40 °C to +85 °C).
Technical Context
The 74ABT16821ADL,512 implements two fully independent 10-bit register sections, each synchronized to the rising edge of its dedicated clock input (1CP or 2CP). Each section's 10-bit parallel data input (1D0–1D9 or 2D0–2D9) is sampled one setup time before the LOW-to-HIGH transition and transferred to corresponding Q outputs (1Q0–1Q9 or 2Q0–2Q9).
Output enable (1OE/2OE) operates asynchronously and independently per section: when LOW, registered data appears at outputs; when HIGH, all ten outputs enter high-impedance OFF-state regardless of clock or register state. Multiple VCC/GND pins minimize switching noise, and power-up 3-state ensures safe initialization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 20-bit bus-interface D-type flip-flop with dual 10-bit registers and independent 3-state control |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V TTL systems and tolerant of supply ripple |
| Max Clock Frequency | 160 MHz at −40 °C to +85 °C - enables high-throughput data capture in real-time control interfaces |
| Output Drive | +64 mA sink / −32 mA source - drives heavy capacitive loads (e.g., >50 pF buses) without external buffers |
| Propagation Delay | tPLH/tPHL ≤ 3.7 ns - ensures tight timing margins in synchronous backplane designs |
| Operating Temperature | −40 °C to +85 °C - qualified for automotive and industrial environments per AEC-Q100 stress requirements |
| ESD Protection | HBM > 2000 V, MM > 200 V - withstands handling and board-level ESD events without latch-up |
Pinout & Package
74ABT16821ADL,512 uses the SSOP56 (SOT371-1) package: plastic shrink small outline, 56 leads, 7.5 mm body width, 0.635 mm lead pitch. Pin layout supports symmetrical power distribution with four VCC (pins 7, 22, 35, 50) and eight GND (pins 4, 11, 18, 25, 32, 39, 46, 53) terminals to suppress ground bounce and supply noise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-LOW output enable | Asynchronously disables all 10 outputs per section into high-Z; enables safe bus sharing |
| 1CP, 2CP | Rising-edge clock input | Samples D inputs on LOW-to-HIGH transition; tsu(H) = 1.8 ns ensures reliable capture at 160 MHz |
| 1D0–1D9, 2D0–2D9 | Data inputs | Parallel 10-bit input per register; accepts standard TTL logic levels (VIL ≤ 0.8 V, VIH ≥ 2.0 V) |
| 1Q0–1Q9, 2Q0–2Q9 | Registered outputs | Edge-triggered Q outputs with ±64 mA/−32 mA drive; support hot-plug live insertion/extraction |
| VCC (×4) | Supply voltage | Distributed power pins reduce IR drop and improve noise immunity across wide die area |
| GND (×8) | Ground reference | Multiple low-inductance return paths minimize simultaneous switching noise (SSN) |
Key Features
| Feature | Design Value |
|---|---|
| Positive-edge triggered dual 10-bit register | Enables independent synchronization of two 10-bit data streams (e.g., address/data lanes) with no inter-section timing dependency |
| Asynchronous 3-state control per section | Allows dynamic bus arbitration: one register can drive while the other is tri-stated, eliminating contention |
| Power-up 3-state and reset | Guarantees outputs remain high-Z until VCC stabilizes, preventing spurious bus activity during power ramp |
| Latch-up protection > 500 mA | Meets JESD78B Class II Level A - prevents destructive latch-up under transient overvoltage or ESD stress |
| Live insertion/extraction support | Permits hot-swap replacement in modular backplanes without system shutdown or bus corruption |
Applications
| Industrial Backplane Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Synchronizing parallel sensor data (e.g., 10-channel ADC outputs) to a central MCU in a programmable logic controller rack. IC Role / Device Role / Timing Role: Dual-register latching element capturing two independent 10-bit data words on separate clock domains before multiplexing onto shared data bus. Use Value: Eliminates metastability risk via controlled edge-triggered sampling and provides bus isolation during data reconfiguration cycles. |
Use Scenario: Interfacing distributed door module sensors (window position, lock status, mirror angle) to a CAN gateway MCU in a vehicle body control unit. IC Role / Device Role / Timing Role: Bus-interface flip-flop buffering and synchronizing 20-bit aggregated I/O status to match MCU parallel interface timing requirements. Use Value: Delivers automotive-grade reliability (−40 °C to +85 °C), ESD-hardened I/O, and live-insertion capability for serviceable modular ECUs. |
| Test Equipment Digital Pattern Generator | Communications Baseband Processor Interface |
Use Scenario: Generating precise, glitch-free 20-bit stimulus patterns for IC functional testing in automated test equipment (ATE). IC Role / Device Role / Timing Role: High-speed D-type register holding pattern bits with sub-4 ns propagation delay to meet tight setup/hold windows of DUTs. Use Value: Enables deterministic pattern delivery at up to 160 MHz, with 3-state outputs allowing seamless pattern switching without bus contention. |
Use Scenario: Latching baseband IQ data (I0–I9, Q0–Q9) between an RF transceiver and a DSP in a wireless infrastructure radio unit. IC Role / Device Role / Timing Role: Dual 10-bit register aligning asynchronous analog front-end sampling clocks to synchronous DSP processing clocks. Use Value: Provides independent clock domains per data lane, minimizing skew between I/Q paths and supporting real-time signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus-interface D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT16821DLR | TI version in same SSOP56 package; identical pinout but different VOL spec (0.45 V max vs. 0.55 V) and lower IOL (64 mA vs. 128 mA absolute max) | Valid for 5 V systems requiring tighter VOL; not rated for 128 mA sink per output | Select SN74ABT16821DLR only if design requires <0.45 V VOL at 64 mA and TI supply chain preference applies |
| 74LVT16821ADL,118 | Nexperia LVT variant: 3.3 V supply only (3.0–3.6 V), lower drive (±32 mA), higher fmax (200 MHz), same pinout | Requires 3.3 V domain; unsuitable for 5 V legacy backplanes but better for mixed-voltage low-power systems | Choose 74LVT16821ADL,118 only when migrating to 3.3 V operation and needing higher speed with reduced power |
Compared with SN74ABT16821DLR and 74LVT16821ADL,118, the 74ABT16821ADL,512 uniquely balances 5 V compatibility, 128 mA absolute sink capability, and automotive temperature range-making it optimal for legacy industrial backplanes where voltage margin and ruggedness outweigh pure speed or low-voltage efficiency.
Availability
74ABT16821ADL,512 is available at Aetrix Electronics and suitable for industrial backplane interfaces, automotive body control modules, and test equipment digital pattern generators requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ABT16821ADL,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 leader in discrete, logic, and PowerMOS semiconductors, spun off from NXP in 2017 and focused on automotive, industrial, computing, and consumer markets.
The 74ABT16821ADL,512 belongs to Nexperia's ABT logic family-designed for high-speed, high-drive 5 V bus interfacing in noise-sensitive, thermally demanding applications such as factory automation controllers and vehicle ECUs.
FAQ
What is the maximum clock frequency supported by the 74ABT16821ADL,512 across its full operating temperature range?
The 74ABT16821ADL,512 guarantees a maximum clock frequency of 160 MHz from −40 °C to +85 °C, as specified in Table 7 of the official Nexperia datasheet Rev. 03. This value reflects worst-case timing across process, voltage, and temperature corners, ensuring reliable operation in industrial and automotive environments without derating.
Does the 74ABT16821ADL,512 support live insertion and extraction in powered-backplane systems?
Yes, the 74ABT16821ADL,512 explicitly supports live insertion and extraction, as confirmed in Section 2 "Features and benefits" of the datasheet. Its power-up 3-state behavior, robust ESD protection (HBM > 2000 V), and latch-up immunity (>500 mA) ensure safe hot-swap operation without disrupting bus integrity or damaging adjacent components.
How many power and ground pins does the 74ABT16821ADL,512 have, and why is this significant?
The 74ABT16821ADL,512 has four VCC pins (7, 22, 35, 50) and eight GND pins (4, 11, 18, 25, 32, 39, 46, 53), as shown in Figure 4 and Table 2. This distributed power/ground architecture minimizes simultaneous switching noise (SSN), reduces ground bounce, and maintains stable VCC under high-output-drive conditions-critical for signal integrity in dense backplane layouts.
What is the output drive capability of the 74ABT16821ADL,512, and how does it compare to standard TTL?
The 74ABT16821ADL,512 delivers +64 mA sink and −32 mA source current per output, exceeding standard TTL (±20 mA) by over 3×. This high drive strength allows direct interfacing with heavily loaded buses, MOS memories, and microprocessor data/address lines without external buffer stages-reducing component count and PCB area.
Is the 74ABT16821ADL,512 pin-compatible with other packages in the same logic family?
No-the 74ABT16821ADL,512 is specific to the SSOP56 (SOT371-1) package. While the pin function mapping matches the TSSOP56 variant (74ABT16821ADGG), the physical dimensions, lead pitch (0.635 mm vs. 0.5 mm), and thermal characteristics differ. Direct PCB substitution requires layout revision due to mechanical incompatibility.
74ABT16821ADL,512 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- 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:
- 250 MHz
- Max Propagation Delay @ V, Max CL:
- 3.3ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 1 mA
- Input Capacitance:
- 3 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-SSOP
74ABT16821ADL,512 FAQ
1.How can I place an order for 74ABT16821ADL,512 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT16821ADL,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 74ABT16821ADL,512 reliable?
The price and inventory of 74ABT16821ADL,512 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT16821ADL,512 is usually 5 days.
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74ABT16821ADL,512 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT16821ADL,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 74ABT16821ADL,512?
For technical support, including 74ABT16821ADL,512 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT16821ADL,512 requirements.
6.How does Aetrix verify that 74ABT16821ADL,512 is sourced from the original manufacturer or authorized distributors?
All 74ABT16821ADL,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 74ABT16821ADL,512 meets industry standards.
7.What is the process for return or replacement of 74ABT16821ADL,512?
All 74ABT16821ADL,512 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT16821ADL,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 74ABT16821ADL,512 part is unused and in its original packaging.
Return procedure for 74ABT16821ADL,512:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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