Overview
The MC100EL15DG is a 5 V ECL (Emitter-Coupled Logic) 1:4 clock distribution chip designed by onsemi. This device is specifically engineered for low skew clock distribution applications, making it ideal for high-speed digital systems. The MC100EL15DG features a multiplexed clock input, allowing for the distribution of both high-speed system clocks and lower speed scan or test clocks. The chip includes synchronous enable/disable functionality to prevent the generation of runt clock pulses during enable/disable operations.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC (PECL Mode) | VEE = 0 V | 4.2 | - | 5.7 | V |
| VEE (NECL Mode) | VCC = 0 V | -5.7 | - | -4.2 | V |
| Output-to-Output Skew | - | - | 50 | - | ps |
| Maximum Toggle Frequency | - | - | 1.25 | - | GHz |
| Propagation Delay (CLK to Q) | - | 410 | 460 | - | ps |
| Operating Temperature Range | - | -40 | - | 85 | °C |
| Storage Temperature Range | - | -65 | - | 150 | °C |
| Power Supply Current (IEE) | - | 25 | 35 | - | mA |
Key Features
- Low Skew Clock Distribution: The MC100EL15DG is designed to minimize output-to-output skew, ensuring precise clock signal distribution.
- Synchronous Enable/Disable: The device features synchronous enable/disable functionality to prevent runt clock pulses during enable/disable operations.
- Multiplexed Clock Input: Allows for the distribution of both high-speed system clocks and lower speed scan or test clocks.
- Internal Input Pulldown Resistors: On CLK, SCLK, SEL, and EN pins to ensure proper signal levels when inputs are left open.
- PECL and NECL Modes: Operates in both Positive ECL (PECL) and Negative ECL (NECL) modes.
- Temperature Compensation: The 100 series includes temperature compensation for stable operation across a wide temperature range.
- Pb-Free, Halogen Free, and RoHS Compliant: Ensures environmental compliance and safety.
Applications
The MC100EL15DG is suitable for various high-speed digital applications, including:
- Telecommunications: For clock distribution in high-speed telecommunication systems.
- Networking Equipment: In network routers, switches, and other high-speed networking devices.
- Computing Systems: For clock distribution in high-performance computing systems and data centers.
- Test and Measurement Equipment: For distributing clock signals in test and measurement instruments.
Q & A
- What is the primary function of the MC100EL15DG?
The MC100EL15DG is a 1:4 clock distribution chip designed for low skew clock distribution applications.
- What are the operating voltage ranges for PECL and NECL modes?
For PECL mode, VCC = 4.2 V to 5.7 V with VEE = 0 V. For NECL mode, VCC = 0 V with VEE = -4.2 V to -5.7 V.
- What is the maximum toggle frequency of the MC100EL15DG?
The maximum toggle frequency is 1.25 GHz.
- What is the output-to-output skew of the MC100EL15DG?
The output-to-output skew is 50 ps.
- Does the MC100EL15DG have temperature compensation?
- What is the purpose of the VBB pin?
The VBB pin provides an internally generated voltage supply that can be used as a switching reference voltage or to rebias AC coupled inputs.
- What are the storage and operating temperature ranges for the MC100EL15DG?
The operating temperature range is -40°C to 85°C, and the storage temperature range is -65°C to 150°C.
- Is the MC100EL15DG Pb-Free, Halogen Free, and RoHS Compliant?
- What is the significance of synchronous enable/disable in the MC100EL15DG?
The synchronous enable/disable feature prevents the generation of runt clock pulses during enable/disable operations.
- Can the MC100EL15DG be used in both PECL and NECL modes?
