company blog about Recycle ON Logic Evaluation Board:Buffers,Logic Gates,Multiplexers

Recycle ON Logic Evaluation Board:Buffers,Logic Gates,Multiplexers

Shenzhen Mingjiada Electronics Co., Ltd. is a strong global electronic components inventory recycler, recycling factories, individuals and agents backlog of electronic components inventory, is committed to customers to digest inventory, reduce warehousing, and reduce the cost of warehousing as well as management costs, to provide customers with high-quality recycling services. At the same time, we are also concerned about the latest developments in electronic products and technology to ensure that our recycling services are always in sync with market demand.

Recycling process:

1、Consultation: If you have stock of electronic components to be disposed of, you can send us the IC/module inventory to be sold by email.

2、Door-to-door recycling: Our company will send professionals to your home to recycle your stock electronic components, and conduct preliminary testing and classification of components.

3、Quotation：The company will give the corresponding recovery price according to the type, quantity, quality and other factors of the recycled components.

4、Settlement: If both parties reach an agreement, you can negotiate a specific transaction for delivery.

I. Buffers: Guardians of Timing Integrity

Buffers primarily enhance signal drive capability, reduce timing skew, and isolate loads within digital systems. ON Semiconductor evaluation boards commonly integrate the following two buffer types to address diverse application requirements:

1. Zero-Delay Clock Buffers

Functionality: Employing phase-locked loop (PLL) technology, these synchronise multiple output clocks with a reference input clock to achieve ‘zero delay’ (where the phase difference between input and output approaches zero). For instance, ON's NB2305AI1HDR2G five-output buffer dynamically compensates for load variations via a fixed feedback path (FBK), limiting output skew to within 200 ps.

Evaluation Board Application: In high-speed synchronous systems (e.g., FPGA clock distribution), the evaluation board simulates real-world load conditions to validate the buffer's improvement in timing margin. For instance, step response testing (as shown in Figure 1) quantifies PLL dynamic performance, ensuring phase overshoot remains below 500 ns stabilisation time at 66.67 MHz.

Key Selection Parameters:

Skew Control: Output-to-output skew (e.g., CY2308 series <200 ps).

Frequency Range: 10–133 MHz (covers most embedded system requirements).

Load Capability: Supports dynamic capacitive load adjustment (e.g., via feedback pin to match PCB trace length).

2. Tri-State Buffers

Functional Features: Output high-impedance state controlled via enable pin (EN), suitable for bus isolation and time-division multiplexing. The NC7SP125P5X series (ON state) supports a wide voltage range of 900 mV–3.6 V with a quiescent current of only 2 µA, ideal for low-power bus designs.

Evaluation board validation: Simulates multi-device shared bus scenarios to test enable switching delays and collision avoidance mechanisms, ensuring signal integrity on address/data buses.

II. Logic Gates: Fundamental Units for Efficient Signal Processing

Logic gates form the building blocks of digital circuits. ON's TinyLogic UHS series is renowned for its compact packaging, low power consumption, and high speed. Evaluation boards facilitate component selection through comparative testing.

1. Key Technical Parameters

Speed-Power Tradeoff: Taking the NC7SZ32P5X (2-input OR gate) as an example, it achieves a propagation delay of just 4.5 ns at 5 V with a static current of 2 µA, making it suitable for battery-powered devices.

Voltage Compatibility: Supports a wide 1.65 V–5.5 V voltage range, enabling direct connection to processors in different power domains (e.g., 1.8 V microcontrollers).

Package Advantages: SC-70-5 package (dimensions 2.0 × 1.25 × 1.0 mm). The evaluation board demonstrates optimised routing for space-constrained applications (e.g., wearables) through high-density layout.

2. Evaluation Board Test Scenarios

Fan-out capability verification: Tests signal attenuation when logic gates drive multiple loads, e.g., the NC7SZ08M5X (NAND gate) maintains 32 mA output current even with a 50 pF load.

Level-Shifting Integration: The evaluation board incorporates 1.8 V logic-compatible circuitry (as per Figure 2), enabling connection to 3.3 V sensors without external level shifters. This reduces BOM costs and PCB footprint by over 25%.

III. Multiplexers: The Core of Flexible Signal Routing

Multiplexers (MUX) enable time-division multiplexing of multiple signals. The ON evaluation board supports complex signal routing verification through a combination of digital and analogue MUXes.

1. Digital Multiplexers

Configurable logic implementation: TPLD programmable MUX based on lookup tables (LUTs). For instance, a 2:1 MUX can be realised via the logic expression (A AND !C) OR (B AND C). The evaluation board demonstrates cascading to form an 8:1 MUX.

Evaluation Focus: Verify select signal switching delay (e.g., noise suppression via SN74HCS151's Schmitt trigger).

2. Analogue Multiplexer

Bidirectional Signal Support: The ON evaluation board integrates TMUX series devices (e.g., TMUX1574), utilising FET symmetry to enable bidirectional signal flow, permitting the same pin to function as either input or output.

High-voltage compatibility: The TMUX4051 supports ±12 V signal ranges, with the evaluation board testing its linearity in industrial sensor acquisition.

3. Low Logic Voltage Integration

1.8 V logic compatibility: The evaluation board incorporates fixed-threshold circuitry (e.g., TMUX136) to eliminate breakdown current between 1.8 V processors and 3.3 V multiplexers, achieving quiescent currents as low as 10–20 nA.