Specifications
| Type | Description |
|---|---|
| Part Number | LMK00304 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package Case | 32-lead WQFN (RTV0032A), 5.00 mm x 5.00 mm body |
| Number of Differential Outputs | 4 outputs arranged as two banks with 2 differential outputs each; Bank A and Bank B |
| Input Multiplexer | 3:1 input multiplexer; two universal inputs plus one crystal input |
| Universal Input Frequency | Up to 3.1 GHz; universal inputs CLKin0/CLKin0* and CLKin1/CLKin1* |
| Universal Input Supported Formats | LVPECL, LVDS, CML, SSTL, HSTL, HCSL, or single-ended clocks |
| Crystal Input Frequency | 10 MHz to 40 MHz; also accepts single-ended clock |
| Differential Output Formats | LVPECL, LVDS, HCSL, or Hi-Z; selectable by CLKout_TYPE pins |
| LVCMOS Reference Output | 1 output; REFout with synchronous enable input |
| LVPECL Additive RMS Jitter | 20 fs RMS; LMK03806 clock source at 156.25 MHz, integration bandwidth 10 kHz to 1 MHz |
| LVPECL Additive RMS Jitter | 51 fs RMS; LMK03806 clock source at 156.25 MHz, integration bandwidth 12 kHz to 20 MHz |
| PSRR | -65 dBc; LVPECL output at 156.25 MHz |
| PSRR | -76 dBc; LVDS output at 156.25 MHz |
| Core Supply Voltage | 3.3 V ±5%; VCC core supply |
| Output Supply Voltage | 3.3 V or 2.5 V ±5%; VCCOA, VCCOB, VCCOC independent output supplies |
| Ambient Temperature Range | -40°C to +85°C; industrial operating range |
| Package | WQFN-32, 5 mm x 5 mm |
| Absolute Maximum Supply Voltage | -0.3 V to 3.6 V; VCC and VCCO over operating free-air temperature range |
| Absolute Maximum Input Voltage | -0.3 V to VCC + 0.3 V; VIN over operating free-air temperature range |
| Storage Temperature Range | -65°C to +150°C; TSTG absolute maximum rating |
| Lead Temperature | +260°C; soldering for 4 seconds |
| Junction Temperature Absolute Maximum | +150°C; TJ absolute maximum rating |
| ESD Rating HBM | ±2000 V; human-body model per ANSI/ESDA/JEDEC JS-001 |
| ESD Rating MM | ±150 V; machine model |
| ESD Rating CDM | ±750 V; charged-device model per JEDEC JESD22-C101 |
| Recommended Ambient Temperature | Min -40°C, Typ 25°C, Max 85°C; TA recommended operating condition |
| Recommended Junction Temperature | Max 125°C; TJ recommended operating condition |
| Recommended Core Supply Voltage | Min 3.15 V, Typ 3.3 V, Max 3.45 V; VCC recommended operating condition |
| Recommended Output Supply Voltage | Min 3.135 V, Typ 3.3 V, Max 3.465 V; VCCO = 3.3 V nominal output supply |
| Recommended Output Supply Voltage | Min 2.375 V, Typ 2.5 V, Max 2.625 V; VCCO = 2.5 V nominal output supply |
| Output Supply Constraint | VCCO ≤ VCC; any output bank supply |
| Junction-to-Ambient Thermal Resistance | 38.1°C/W; RTV0032A WQFN, 32 pins |
| Junction-to-Case Top Thermal Resistance | 7.2°C/W; RTV0032A WQFN, 32 pins |
| VCCOA Pins | Pins 2 and 5; Bank A output buffer power supply, internally tied together |
| VCCOB Pins | Pins 20 and 23; Bank B output buffer power supply, internally tied together |
| VCCOC Pin | Pin 30; REFout buffer power supply |
| Core VCC Pins | Pins 10 and 28; core and input buffer power supply |
| Control Input Biasing | Internal pull-down resistor; CLKout_TYPE0/1, CLKin_SEL0/1, REFout_EN CMOS control inputs |
| Datasheet Status | request_only |
Product Overview
The Texas Instruments LMK00304 is a differential clock buffer/level translator for Signal_Chain clock distribution paths. It includes four differential outputs organized as two banks with two differential outputs each, plus one LVCMOS REFout output with a synchronous enable input.
Input selection is handled by a 3:1 input multiplexer using two universal inputs and one crystal input. The universal CLKin0/CLKin0* and CLKin1/CLKin1* inputs support operation up to 3.1 GHz and accept LVPECL, LVDS, CML, SSTL, HSTL, HCSL, or single-ended clocks. The crystal input supports 10 MHz to 40 MHz and also accepts a single-ended clock.
Output formats are selectable through the CLKout_TYPE pins and include LVPECL, LVDS, HCSL, or Hi-Z. The device uses a 3.3 V ±5% core supply and independent 3.3 V or 2.5 V ±5% output supplies with VCCO constrained to be no greater than VCC. It is specified for -40°C to +85°C ambient operation in a WQFN-32, 5 mm x 5 mm package.
Key Features
- Four differential outputs in two output banks
- 3:1 input multiplexer with crystal input path
- Universal inputs support up to 3.1 GHz
- Universal inputs accept LVPECL, LVDS, CML, SSTL, HSTL, HCSL
- Crystal input supports 10 MHz to 40 MHz
- Selectable LVPECL, LVDS, HCSL, or Hi-Z outputs
- One LVCMOS REFout with synchronous enable
- 20 fs RMS LVPECL additive jitter over 10 kHz to 1 MHz
- Independent 3.3 V or 2.5 V output supplies
- WQFN-32 package with 5 mm x 5 mm body
Typical Applications
- Differential clock buffering
- Clock level translation
- Reference clock fanout
- Crystal-input clock distribution
- LVCMOS reference output generation
- LVPECL output clock distribution
- LVDS output clock distribution
- HCSL output clock distribution
Procurement Notes
When requesting a quote for LMK00304, 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
How many differential outputs does the LMK00304 provide?
The LMK00304 provides four differential outputs. They are arranged as two output banks, Bank A and Bank B, with two differential outputs in each bank.
What input clock formats are supported by the universal inputs?
The universal inputs support LVPECL, LVDS, CML, SSTL, HSTL, HCSL, or single-ended clocks. These inputs are CLKin0/CLKin0* and CLKin1/CLKin1* and support frequencies up to 3.1 GHz.
What supply voltages are used by the LMK00304?
The core VCC supply is 3.3 V ±5%. The independent output supplies VCCOA, VCCOB, and VCCOC may use 3.3 V or 2.5 V ±5%, with the constraint that VCCO must not exceed VCC.
What package and temperature range apply to this device?
The LMK00304 is supplied in a WQFN-32, 5 mm x 5 mm package. Its industrial ambient operating range is -40°C to +85°C, with recommended junction temperature specified up to 125°C.
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.