Specifications
| Type | Description |
|---|---|
| Part Number | LMK00308 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package Case | 40-lead WQFN (RTA), 6.00 mm x 6.00 mm nominal body |
| Maximum Operating Frequency | 3 GHz |
| Universal Input Frequency | Up to 3.1 GHz |
| Input Multiplexer | 3:1 |
| Universal Input Signal Compatibility | LVPECL, LVDS, CML, SSTL, HSTL, HCSL, or single-ended clocks |
| Crystal Input Frequency | 10 to 40 MHz |
| Differential Output Count | 8 outputs |
| Output Bank Count | 2 banks |
| Differential Output Types | LVPECL, LVDS, HCSL, or Hi-Z |
| LVCMOS Output Count | 1 output |
| LVPECL Additive RMS Jitter | 20 fs RMS |
| LVPECL Additive RMS Jitter | 51 fs RMS |
| Power Supply Rejection Ratio | -65 dBc |
| Power Supply Rejection Ratio | -76 dBc |
| Core Supply Voltage | 3.3 V ±5% |
| Output Supply Voltage | 3.3 V or 2.5 V ±5% |
| Independent Output Supplies | 3 |
| Operating Ambient Temperature | -40°C to +85°C |
| Package Pin Count | 40 pins |
| Package Body Size | 6.00 mm x 6.00 mm |
| Supply Voltage Absolute Maximum | -0.3 V to 3.6 V |
| Input Voltage Absolute Maximum | -0.3 V to VCC + 0.3 V |
| Storage Temperature | -65°C to +150°C |
| Lead Temperature | +260°C |
| Junction Temperature Absolute Maximum | +150°C |
| ESD Rating | ±2000 V |
| ESD Rating | ±150 V |
| ESD Rating | ±750 V |
| Recommended Ambient Temperature | Min -40°C, Typ 25°C, Max 85°C |
| Recommended Junction Temperature | Max 125°C |
| Recommended Core Supply Voltage | Min 3.15 V, Typ 3.3 V, Max 3.45 V |
| Recommended Output Supply Voltage | Min 3.3 V -5%, Typ 3.3 V, Max 3.3 V +5% |
| Datasheet Status | request_only |
Product Overview
The LMK00308 is a Texas Instruments Signal_Chain differential clock buffer/level translator intended for clock distribution and level translation tasks defined by its supported input and output formats. Its CLKin0 and CLKin1 universal inputs accept LVPECL, LVDS, CML, SSTL, HSTL, HCSL, or single-ended clocks up to 3.1 GHz, while the OSCin crystal input supports 10 to 40 MHz operation. A 3:1 input multiplexer selects between the two universal inputs and the crystal input.
The output structure includes eight differential outputs in two banks, with four differential outputs per bank. Each differential output bank can be configured for LVPECL, LVDS, HCSL, or Hi-Z operation. A separate REFout LVCMOS output includes a synchronous enable input.
The device uses a 3.3 V ±5% VCC core supply and independent VCCOA, VCCOB, and VCCOC output supplies specified for 3.3 V or 2.5 V ±5%. It is supplied in a 40-lead WQFN (RTA), 6.00 mm x 6.00 mm nominal body package. Operating ambient temperature is -40°C to +85°C, with recommended junction temperature up to 125°C and absolute maximum junction temperature of +150°C.
Key Features
- 3 GHz maximum differential clock buffer operation
- Universal inputs support clock rates up to 3.1 GHz
- 3:1 multiplexer selects two clock inputs or crystal input
- Universal inputs support LVPECL, LVDS, CML, SSTL, HSTL, HCSL
- OSCin crystal input supports 10 MHz to 40 MHz
- Eight differential outputs arranged as two four-output banks
- Output banks selectable as LVPECL, LVDS, HCSL, or Hi-Z
- REFout provides one LVCMOS output with synchronous enable
- 20 fs RMS LVPECL additive jitter over 10 kHz to 1 MHz
- Three independent output supplies support output-bank power domains
- Industrial ambient operating range from -40°C to +85°C
Typical Applications
- Differential clock distribution
- Clock level translation
- LVPECL clock fanout
- LVDS clock fanout
- HCSL clock distribution
- Crystal-referenced clock buffering
- Multi-bank output clock routing
- Industrial temperature clock systems
Procurement Notes
When requesting a quote for LMK00308, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What type of device is the LMK00308?
The LMK00308 is a Texas Instruments differential clock buffer/level translator in the Signal_Chain category. It supports differential clock buffer operation up to 3 GHz and universal CLKin0/CLKin1 inputs up to 3.1 GHz.
How many outputs does the LMK00308 provide?
The device provides eight differential outputs arranged as two banks with four differential outputs per bank. It also includes one REFout LVCMOS output with a synchronous enable input.
Which input and output logic types are supported?
The universal inputs support LVPECL, LVDS, CML, SSTL, HSTL, HCSL, or single-ended clocks. The differential output banks can be selected as LVPECL, LVDS, HCSL, or Hi-Z.
What package is used for the LMK00308?
The LMK00308 is supplied in a 40-lead WQFN (RTA) package. The nominal package body size is 6.00 mm x 6.00 mm.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 7, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.