The 5X1503 is a series of small form factor programmable clock generators intended for low-power, consumer, battery powered applications, wearable and smart devices.

The device is a 1 PLL + DCO architecture design with one embedded crystal. The device is OTP programmable, allowing for up to 3 unique frequency outputs. The 5X1503 has built-in unique features such as Proactive Power Saving (PPS) and a low power DCO to support system date/time keeping clock at 32.768kHz. Dynamic Frequency Control (DFC) supports dynamically changing between four different PLL frequencies via external requests with controlled frequency changes, reducing frequency overshoot and undershoot (ORT). The 5X1503S device can also support a spread clock for EMI reduction.

An internal OTP memory allows the user to store up to four independent configurations that can be loaded on power-up without programming. It can then be reprogrammed again through the I2C interface.

The 5X1503 supports three LVCMOS type outputs. Two outputs have programmable amplitude. A low-power 32.768kHz clock is supported with only less than 1.5μA current consumption for system RTC reference clock needs.


  • Proactive Power Saving (PPS) features save power during the end device power down mode
  • Dynamic Frequency Control (DFC) feature allows programming up to 2 difference configuration that switch dynamically
  • Programmable output clock amplitude(1.0V, 1.1V, 1.2V and 1.8V)  to support low output swing clock requirement
  • Dedicated 32kHz output with 8 options clock amplitude (5X1503L)
  • Spread Spectrum compatible; tracks spreading input clock for low EMI (5X1503S)
  • Integrated crystal for no external input source requirement
  • User configurable through I2C or OTP programming
  • Supported by IDT Timing Commander™  software tool

Product Options

This device is factory-configurable. Try the Custom Part Configuration Utility.
Part Number Description Part Status Pkg. Type Lead Count (#) Temp. Grade Carrier Type Buy Sample
Standard Active VFQFPN 10 I Cut Tape
Standard Active VFQFPN 10 I Reel
Ultra Low-power Active VFQFPN 10 I Cut Tape
Ultra Low-power Active VFQFPN 10 I Reel
Spread Clock Active VFQFPN 10 I Cut Tape
Spread Clock Active VFQFPN 10 I Reel

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
5X1503 Datasheet Datasheet PDF 485 KB
User Guides & Manuals
5x1503 Programming Guide Guide PDF 220 KB
Timing Commander Installation Guide Guide PDF 497 KB
Application Notes & White Papers
AN-1045 MicroClock Low Power and EMI Recommendations Application Note PDF 358 KB
AN-918 Programmable Clocks vs Crystal Oscillators Application Note PDF 307 KB
AN-845 Termination - LVCMOS Application Note PDF 146 KB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 495 KB
AN-815 Understanding Jitter Units Application Note PDF 565 KB
AN-806 Power Supply Noise Rejection Application Note PDF 438 KB
Timing Commander Installer (v1.16.4) Software ZIP 19.79 MB
MicroClock Timing Commander Personality File (v4.14) Software ZIP 8.19 MB
5X1503-5L1503 Reference Schematic Schematic PDF 58 KB
MicroClock Programmable Clocks Family Overview Overview PDF 1023 KB
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB

Boards & Kits

Part Number Title Type Company
DEV5X1503 MicroClock 5X1503 / 5X1503L / 5X1503S Development Kits Development Renesas