Overview
The MC100EP195B, produced by onsemi, is a 3.3 V ECL Programmable Delay Chip (PDC) designed primarily for clock deskewing and timing adjustment in high-speed systems. This component provides variable delay of differential NECL/PECL input transitions, making it ideal for applications requiring precise timing control.
The device features a programmable matrix of gates and multiplexers, allowing for a digitally selectable delay resolution of about 10 ps and a net range of up to 10.2 ns. The delay is controlled by 10 data select inputs (D[9:0]) and can be set in real-time or locked using the LEN pin.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC (Positive Mode Power Supply) | VEE = 0 V | - | - | 6 | V |
| VEE (Negative Mode Power Supply) | VCC = 0 V | -6 | - | - | V |
| VI (Input Voltage) | VEE = 0 V or VCC = 0 V | -6 | - | 6 | V |
| IO (Output Current) | Continuous | - | - | 50 mA | mA |
| IO (Output Current) | Surge | - | - | 100 mA | mA |
| TA (Operating Temperature Range) | - | -40 | - | 85 | °C |
| Tstg (Storage Temperature Range) | - | -65 | - | 150 | °C |
| Delay Resolution | - | - | ~10 ps | - | ps |
| Delay Range | - | - | up to 10.2 ns | - | ns |
| Minimum Delay | - | - | 2.2 ns | - | ns |
Key Features
- Programmable Delay: The MC100EP195B offers a programmable delay with a resolution of about 10 ps and a range of up to 10.2 ns, controlled by 10 data select inputs (D[9:0]).
- Cascading Capability: The device includes internal cascade circuitry, allowing multiple MC100EP195Bs to be cascaded for increased programmable range without external gating.
- Input Compatibility: The device can accept LVPECL, LVDS, LVCMOS, ECL, and LVTTL level signals by adjusting the VEF and VCF pins.
- Temperature Compensation: The device includes temperature compensation to ensure stable operation across a wide temperature range.
- VBB Reference Voltage: An internally generated VBB voltage is available for rebiasing AC coupled inputs and as a switching reference voltage for single-ended inputs.
Applications
- Clock Deskewing: The MC100EP195B is primarily used for clock deskewing and timing adjustment in high-speed systems.
- Multiple Channel Delay Matching: It is useful for deskewing multiple signal channels to eliminate timing skews in high-speed systems.
- Delay Measurement: The device can be used in combination with other components to measure the unknown delay of a device with high precision.
- High-Speed Systems: It is suitable for any high-speed system requiring fine-tuned timing adjustments.
Q & A
- What is the primary function of the MC100EP195B?
The MC100EP195B is designed primarily for clock deskewing and timing adjustment in high-speed systems.
- What is the delay resolution and range of the MC100EP195B?
The device offers a delay resolution of about 10 ps and a range of up to 10.2 ns.
- How is the delay controlled in the MC100EP195B?
The delay is controlled by 10 data select inputs (D[9:0]) and can be set in real-time or locked using the LEN pin.
- Can the MC100EP195B be cascaded with other devices?
Yes, the device includes internal cascade circuitry, allowing multiple MC100EP195Bs to be cascaded for increased programmable range.
- What types of input signals can the MC100EP195B accept?
The device can accept LVPECL, LVDS, LVCMOS, ECL, and LVTTL level signals by adjusting the VEF and VCF pins.
- What is the purpose of the VBB pin in the MC100EP195B?
The VBB pin provides an internally generated reference voltage for rebiasing AC coupled inputs and as a switching reference voltage for single-ended inputs.
- What is the operating temperature range of the MC100EP195B?
The device operates within a temperature range of -40°C to +85°C.
- How does the MC100EP195B handle temperature variations?
The device includes temperature compensation to ensure stable operation across a wide temperature range.
- What is the minimum delay of the MC100EP195B?
The minimum delay of the device is 2.2 ns.
- Can the MC100EP195B be used for measuring unknown delays?
Yes, the device can be used in combination with other components to measure the unknown delay of a device with high precision.
