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CLOCK

Han-ZenX·CLOCK·hardware/schematic/v1.0/CLOCK/CLOCK.kicad_pcb

CLOCK PCB layout, top view — open source STM32 board by Han-ZenX

About the CLOCK PCB

CLOCK is an open source STM32 PCB design by Han-ZenX, published on GitHub under the Custom license license. It is a 4-layer board measuring 90 × 90 mm, with 157 components from 43 distinct parts.

Its main chip is the STM32F103CBTx, from the STM32 family. Other key parts include the LMK5B12204, LMK1C1102, TPS78633, OCXO-10M and TPS63020DSJR. By type, the board carries 72 capacitors, 42 resistors, 16 connectors, 11 inductors, 8 ICs and 2 diodes.

From the project

High-precision frequency meter clock generation module

本模块是高精度频率计的后端标准时钟产生系统，为频率测量提供超稳定的时间基准信号。采用 TI 高端时钟发生器芯片 LMK5B12204 和 LMK1C1102，实现超低相位噪声和高精度的时钟输出，适用于精密测试测量、通信系统、雷达电子战等对时钟质量要求极高的应用场景。

- ✅ 超低相位噪声：专业级时钟性能，满足苛刻的频谱纯度要求 - ✅ 多路可编程输出：支持 4 路独立可编程差分时钟输出（LVDS/PECL） - ✅ 高分辨率频率合成：支持 1Hz-3.3GHz 范围内任意频率设定 - ✅ 参考源冗余切换：双参考输入 + 自动切换，确保时钟连续性 - ✅ 低抖动性能：<0.2ps RMS 抖动，提供精准时序基准 - ✅ EEPROM 存储：配置断电保存，上电自启动 - ✅ 硬件级稳定性：工业级设计，宽温工作范围

- 核心电压：3.3V ±5% - 功耗：典型 1.2W - 电源抑制比：>60dB

Main components on the CLOCK

LMK5B12204LMK1C1102TPS78633OCXO-10MTPS63020DSJRSTM32F103CBTx

CLOCK bill of materials (BOM)

157 components, 43 distinct parts.

QtyPartRefs
1
LMK5B12204
U1
2
LMK1C1102
U2, U3
2
TPS78633
U4, U5
1
OCXO-10M
U6
1
TPS63020DSJR
U7
1
STM32F103CBTx
U8
1
X32258MOB4SI
YXC Crystal Oscillators
X1
11
Conn_Coaxial
J1, J2, J3, J4, J5, J6, J7, J8 +3
1
Conn_01x06_Socket
J11
1
Conn_01x04_Socket
J13
1
Conn_01x02_Socket
J14
2
Conn_01x03_Pin
J15, J16
3
HX_PH254-01-03-Z-L11_5_PCB_PIN_HEADER
hanxia
H1, H6, H7
1
TestPoint
TP2
1
TYPE-C_16PIN_2MD_073
SHOU HAN
USB1
2
LED
D1, D2
7
220 ohm@100mhz
FB1, FB3, FB4, FB5, FB7, FB9, FB10
2
80 ohm@100mhz
FB2, FB6
1
600 ohm@100mhz
FB8
1
2.2uH
cjiang (Changjiang Microelectronics Tech)
L1
Show 23 more
QtyPartRefs
41
100nF
C1, C2, C3, C4, C5, C8, C11, C12 +33
12
10uF
C6, C9, C20, C21, C22, C23, C24, C25 +4
6
1uF
C7, C10, C16, C40, C50, C59
1
470nF
C26
2
2.2uF
C38, C42
2
10nF
C39, C43
1
10uF
C44
3
10uF
C48, C53, C57
1
22uF
C55
1
1uF
C58
2
20pF
C70, C71
2
4.7K
R1, R2
1
3296W-1-103_C48997937
jieerrui
R3
8
49.9
R4, R5, R7, R8, R24, R25, R26, R27
2
10K
R6, R39
9
0
R9, R11, R18, R21, R28, R29, R35, R40 +1
3
10K
R10, R12, R41
4
DNP
R13, R22, R23, R32
8
1K
R14, R15, R16, R17, R19, R20, R33, R34
2
5.1K
R30, R31
1
909K
R36
1
100K
R37
1
10
R38

CLOCK design files

The KiCad project lives in the Han-ZenX/CLOCK repository on GitHub; these links point at the commit this page was built from.

CLOCK: common questions

What microcontroller does the CLOCK use?

The CLOCK is built around the STM32F103CBTx, from the STM32 family.

How big is the CLOCK PCB?

The CLOCK measures 90 × 90 mm, has 4 copper layers and is 1.6062 mm thick.

How many components are on the CLOCK?

157 components, from 43 distinct parts. The full bill of materials is listed on this page.

Where can I download the CLOCK design files?

From the Han-ZenX/CLOCK repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the CLOCK design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

Can I test firmware for the CLOCK without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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