Overview
The LMK1C1104DQFR is a high-performance, low-skew, general-purpose clock buffer from Texas Instruments. This device is part of the LMK1C110x family, which is designed with a modular approach, offering fan-out variations of 1:2, 1:3, and 1:4. The LMK1C1104DQFR is available in an 8-pin WSON (DQF) package and is characterized by its low additive jitter, low output skew, and wide operating temperature range.
This clock buffer supports synchronous output enable control and features fail-safe inputs to prevent oscillation at the outputs in the absence of an input signal. It operates in 1.8-V, 2.5-V, and 3.3-V environments and is backward compatible with the CDCLVC110x family, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | WSON (DQF) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Supply Voltage | 1.8 V, 2.5 V, 3.3 V | V |
| Maximum Input Frequency | 250 MHz (3.3 V), 200 MHz (2.5 V and 1.8 V) | MHz |
| Output Skew | < 50 ps | ps |
| Additive Jitter | < 50 fs (max), 7.5 fs (typ at VDD = 3.3 V), 10 fs (typ at VDD = 2.5 V), 19.2 fs (typ at VDD = 1.8 V) | fs |
| Propagation Delay | < 3 ns | ns |
| Output Rise and Fall Time | 0.35 to 0.7 ns (20/80%, CL = 5 pF) | ns |
| Input Type | LVCMOS Clock Input | - |
| Output Type | LVCMOS Clock Output | - |
Key Features
- High-performance 1:2, 1:3, or 1:4 LVCMOS clock buffer
- Very low output skew (< 50 ps)
- Extremely low additive jitter (< 50 fs maximum)
- Very low propagation delay (< 3 ns)
- Synchronous output enable control
- 3.3-V tolerant input at all supply voltages
- Fail-safe inputs to prevent oscillation at the outputs
- Operating temperature range: –40°C to 125°C
- Available in 8-pin TSSOP and WSON packages
Applications
- Factory automation & control
- Telecommunications equipment
- Data center & enterprise computing
- Grid infrastructure
- Motor drives
- Medical imaging
Q & A
- What is the maximum input frequency for the LMK1C1104DQFR?
The maximum input frequency is 250 MHz for 3.3 V and 200 MHz for 2.5 V and 1.8 V.
- What are the available supply voltages for the LMK1C1104DQFR?
The device operates with supply voltages of 1.8 V, 2.5 V, and 3.3 V.
- What is the output skew of the LMK1C1104DQFR?
The output skew is less than 50 ps.
- What is the additive jitter of the LMK1C1104DQFR?
The additive jitter is less than 50 fs maximum, with typical values of 7.5 fs at VDD = 3.3 V, 10 fs at VDD = 2.5 V, and 19.2 fs at VDD = 1.8 V.
- What is the propagation delay of the LMK1C1104DQFR?
The propagation delay is less than 3 ns.
- What are the package options for the LMK1C1104DQFR?
The device is available in 8-pin TSSOP and WSON packages.
- What is the operating temperature range of the LMK1C1104DQFR?
The operating temperature range is –40°C to 125°C.
- Does the LMK1C1104DQFR have fail-safe inputs?
Yes, the device has fail-safe inputs to prevent oscillation at the outputs in the absence of an input signal.
- What are some common applications for the LMK1C1104DQFR?
Common applications include factory automation & control, telecommunications equipment, data center & enterprise computing, grid infrastructure, motor drives, and medical imaging.
- Is the LMK1C1104DQFR backward compatible with other Texas Instruments clock buffer families?
Yes, the LMK1C1104DQFR is backward compatible with the CDCLVC110x family.
