New Product Release | MS1153: Two-Channel General-Purpose Frequency Synthesizer – Ultra-Low Power for Portable Devices

Runmicro Technology introduces the MS1153, a two-channel general-purpose frequency synthesizer with an output frequency range of 20 kHz to 30 MHz and a resolution as fine as 1 Hz. It delivers a cost-effective, flexible clock solution for portable devices.

Key Advantages

01 Dual-Channel Programmable Output with Precise Frequency Tuning

The MS1153 supports simultaneous output on two channels, covering a frequency range of 20 kHz to 30 MHz with a resolution down to 1 Hz. The two outputs can be independently configured to different frequencies, meeting the need for independent clock sources across multiple modules. This replaces the need for two crystal oscillators, simplifies PCB layout, and reduces BOM cost.

02 Ultra-Low Power with Three Flexible Operating Modes

The chip integrates both hard power‑down and soft power‑down low‑power modes:

• Hard power‑down current is as low as 100 nA, ideal for long‑term standby applications.

• Soft power‑down current is only 4 mA, significantly reducing power while retaining register configurations.

• Normal operating current is just 11 mA.

  These three modes enable fine‑grained power management for battery‑powered portable devices.

03 Flexible Output: Independent Frequencies or Differential Output

The two clock outputs can be configured to output independent frequencies, or can be paired as a differential output with adjustable dead‑time. The output dead‑time is programmable via register (step size 0.6 ns to 1.53 ns, range 0 to 10 ns), meeting the requirements of differential clock applications that demand precise dead‑time control.

04 Wide Supply Voltage Range and High Power Supply Rejection Ratio (PSRR)

The chip supports a wide supply voltage range of 2.5 V to 3.6 V, compatible with various system power architectures. Its built‑in high PSRR effectively suppresses the impact of power‑supply noise on the clock signal, ensuring clean and stable output clocks.

Key Specifications

Note: Refer to the datasheet for complete specifications.

Application Scenarios

1 Hair Removal and Beauty Devices

Hair removal and beauty devices often require multiple clock signals at different frequencies to drive lasers, intense pulsed light (IPL), or RF control circuits. The MS1153’s dual‑channel outputs can simultaneously provide two independent frequencies, eliminating the need for two crystals, simplifying PCB layout, and reducing BOM cost. Its glitch‑free frequency switching ensures stable control signals during mode transitions, preventing false triggering and providing a reliable, cost‑effective clock solution for aesthetic instruments.

2 Replacement for Quartz Crystal Oscillators

The MS1153 can replace traditional quartz crystal oscillators, offering more flexible frequency configuration for the system. Unlike fixed‑frequency crystals, the MS1153 supports a wide output range from 20 kHz to 30 MHz with 1‑Hz resolution. A single chip covers multiple frequency requirements, streamlining material management.

The MS1153 provides a high‑cost‑performance clock solution for portable devices and crystal‑replacement applications.