Overview
The LMK00101SQE/NOPB is a high-performance, ultra-low jitter LVCMOS fanout buffer and level translator produced by Texas Instruments. This device is designed to distribute 10 ultra-low jitter clocks from a differential, single-ended, or crystal input, making it ideal for various networking, telecom, server, storage area networking, RRU LO reference distribution, medical, and test equipment applications.
The LMK00101 features a universal input that can accept LVPECL, LVDS, HCSL, SSTL, and other differential and single-ended signals. It operates with a core supply voltage of 2.5 or 3.3 V and adjustable output supply voltages of 1.5, 1.8, 2.5, or 3.3 V for each output bank. The device is packaged in a 32-pin WQFN package with an exposed pad for improved thermal dissipation.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Core Supply Voltage (Vdd) | 2.375 | 3.3 | 3.45 | V |
| Output Supply Voltage (Vddo) | 1.425 | - | Vdd | V |
| Output Skew | - | 6 | 25 | ps |
| Additive Phase Jitter at 156.25 MHz | - | 30 | - | fs |
| Propagation Delay | - | 0.85 | 2.2 | ns |
| Power Supply Ripple Rejection (PSRR) | -44 | - | - | dBc |
| Core Current (IVdd) at 100 MHz | - | 24 | - | mA |
| Output Current (IVddo) per Output at 100 MHz | - | 7 | - | mA |
Key Features
- Ultra-low jitter: 30 fs at 156.25 MHz (12 kHz to 20 MHz)
- Universal input: Supports LVPECL, LVDS, HCSL, SSTL, and other differential and single-ended signals
- 10 LVCMOS/LVTTL outputs, DC to 200 MHz
- Adjustable output supply voltage: 1.5, 1.8, 2.5, or 3.3 V for each bank
- Core supply voltage: 2.5 or 3.3 V
- Low propagation delay and output skew
- High power supply ripple rejection (PSRR)
- Integrated crystal oscillator circuit supporting fundamental mode, AT-cut crystals
- Output enable for glitch-free operation
- 32-pin WQFN package with exposed pad for improved thermal dissipation
Applications
- LO Reference Distribution for RRU Applications
- SONET, Ethernet, Fibre Channel Line Cards
- Optical Transport Networks
- GPON OLT/ONU
- Server and Storage Area Networking
- Medical Imaging
- Portable Test and Measurement
- Crystal Oscillator Interface
- High-end A/V
Q & A
- What is the primary function of the LMK00101?
The LMK00101 is a high-performance, ultra-low jitter LVCMOS fanout buffer and level translator designed to distribute clocks from various input sources.
- What types of input signals can the LMK00101 accept?
The LMK00101 can accept LVPECL, LVDS, HCSL, SSTL, and other differential and single-ended signals.
- What is the range of output frequencies supported by the LMK00101?
The device supports output frequencies from DC to 200 MHz.
- What are the available core and output supply voltage options for the LMK00101?
The core supply voltage can be 2.5 or 3.3 V, and the output supply voltage can be set to 1.5, 1.8, 2.5, or 3.3 V for each bank.
- What is the additive phase jitter of the LMK00101 at 156.25 MHz?
The additive phase jitter is 30 fs at 156.25 MHz (12 kHz to 20 MHz).
- How many outputs does the LMK00101 have, and what type are they?
The LMK00101 has 10 LVCMOS/LVTTL outputs.
- Does the LMK00101 have an integrated crystal oscillator?
Yes, the LMK00101 has an integrated crystal oscillator circuit that supports fundamental mode, AT-cut crystals.
- What is the package type and size of the LMK00101?
The device is packaged in a 32-pin WQFN package with an exposed pad, measuring 5.0 x 5.0 x 0.8 mm.
- What are some typical applications of the LMK00101?
Typical applications include LO reference distribution for RRU, SONET, Ethernet, Fibre Channel line cards, optical transport networks, GPON OLT/ONU, server and storage area networking, medical imaging, portable test and measurement, and high-end A/V.
- How does the output enable feature work on the LMK00101?
The output enable feature allows for glitch-free operation. When the OE pin is taken from Low to High, the outputs will not oscillate and will go to a Disabled (Hi-Z) state after the next rising edge of the clock input.
