Overview
The LMK1C1102 from Texas Instruments is a high-performance, low-skew, general-purpose clock buffer. This device is part of the LMK1C110x family, which is designed with a modular approach, offering various fan-out configurations such as 1:2, 1:3, and 1:4. The LMK1C1102 specifically provides two LVCMOS clock outputs. It operates at supply voltages of 1.8 V, 2.5 V, and 3.3 V, making it versatile for a wide range of applications. The device is characterized by its low additive jitter, low output skew, and wide operating temperature range from –40°C to 125°C. It also features synchronous output enable and fail-safe inputs, ensuring reliable operation even in the absence of an input signal.
Key Specifications
| Parameter | Test Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Supply Voltage (VDD) | 1.8 V, 2.5 V, 3.3 V | V | |||
| Input Frequency (fIN) | VDD = 3.3 V | 250 MHz | MHz | ||
| Input Frequency (fIN) | VDD = 2.5 V and 1.8 V | 200 MHz | MHz | ||
| Output Skew (tOUTPUT-SKEW) | 25 ps | 50 ps | ps | ||
| Propagation Delay (tPROP-DELAY) | 1.5 ns | 2 ns | ns | ||
| Additive Jitter (tJITTER-ADD) | fIN = 156.25 MHz, VDD = 3.3 V | 7.5 fs | 20 fs | fs, RMS | |
| Output Impedance (ROUT) | 50 Ω | Ω | |||
| Operating Temperature Range | –40°C | 125°C | °C | ||
| Package | TSSOP (8), WSON (8) |
Key Features
- High-performance 1:2, 1:3, or 1:4 LVCMOS clock buffer
- Very low output skew (< 50 ps)
- Extremely low additive jitter (e.g., 7.5 fs typical at VDD = 3.3 V)
- Very low propagation delay (< 3 ns)
- Synchronous output enable
- Fail-safe inputs to prevent oscillation in the absence of an input signal
- 3.3-V tolerant input at all supply voltages
- Available in 8-pin TSSOP and WSON packages
Applications
- Factory automation and control
- Telecommunications equipment
- Data center and enterprise computing
- Grid infrastructure
- Motor drives
- Medical imaging
Q & A
- What are the available supply voltages for the LMK1C1102?
The LMK1C1102 operates at supply voltages of 1.8 V, 2.5 V, and 3.3 V.
- What is the maximum input frequency for the LMK1C1102 at 3.3 V supply voltage?
The maximum input frequency at 3.3 V supply voltage is 250 MHz.
- What is the typical additive jitter of the LMK1C1102 at 3.3 V supply voltage?
The typical additive jitter at 3.3 V supply voltage is 7.5 fs.
- What is the propagation delay of the LMK1C1102?
The propagation delay is less than 3 ns.
- Does the LMK1C1102 have synchronous output enable?
- What are the package options for the LMK1C1102?
The LMK1C1102 is available in 8-pin TSSOP and WSON packages.
- What is the operating temperature range of the LMK1C1102?
The operating temperature range is from –40°C to 125°C.
- Can unused outputs be left floating?
- Does the LMK1C1102 support fail-safe inputs?
- What are some typical applications of the LMK1C1102?
Typical applications include factory automation, telecommunications equipment, data center and enterprise computing, grid infrastructure, motor drives, and medical imaging.
