2 layers82.6 × 76.2 mm
Mss cascade basic
IowaScaledEngineering/mss-cascade
Integrated Cascade Module for Free-mo Modular Signal System
111 parts
2 layers101.6 × 120.7 mm
Mss cascade basic testjig
IowaScaledEngineering/mss-cascadeIntegrated Cascade Module for Free-mo Modular Signal System
- Size
- 101.6 × 120.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 101
- Nets
- 103
- Pads
- 319
- Tracks, vias
- 787, 116
- Pours
- 8
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 14 Oct 2015
- Updated
- 31 Aug 2026
Overview
Mss cascade basic testjig is an open-source printed circuit board by IowaScaledEngineering, from the IowaScaledEngineering/mss-cascade repository on GitHub. It is a 2-layer board of 101.6 × 120.7 mm with 101 parts on 103 nets, routed with 787 tracks and 116 vias.
It is built around the DRV8872DDA, 74HC4049D and AP7381-50Y, with the PCA9555PW, ZXMS6004FF and SM04B-SRSS-TB among its other parts. Its parts include 38 resistors, 16 capacitors, 12 transistors, 8 connectors and 7 diodes. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
9
DRV8872DDA
SO-8-40℃~+125℃ 3.6A 565mΩ Interleaved conduction protection、Current sensing/regulation function Yes SO-8 Brushed DC Motor Drivers ROHSTexas InstrumentsBrushed DC Motor Drivers
74HC4049D
SO-16-40℃~+125℃ 1.5V、3.15V、4.2V 1.9V、4.4V、5.9V 22ns@6.0V,50pF 2V~6V 400mV 40uA 5.2mA 5.2mA 500mV、1.35V、1.8V 6 74HC SO-16 Inverters ROHSNexperiaInverters
AP7381-50Y
SOT-89-40℃~+125℃@(Tj) 1 150mA 1V@(100mA) 2.5uA 40V 5V 60dB Fixed Positive Short Circuit Protection、Thermal Shutdown SOT-89 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSDiodes IncorporatedVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
PCA9555PW
TSSOP-24-40℃~+85℃ 1.1uA 16 2.3V~5.5V 3mA 400kHz 8 I2C、SMBus Interrupt Output Reset function、Cascade and address expansion TSSOP-24 I/O Expanders ROHSNXP SemiconductorsI/O Expanders
ZXMS6004FF
SOT-23F-40℃~+125℃ 1 1.3A 350mΩ 60V Active High Low Side Switch SOT-23F Power Distribution Switches ROHSDiodes IncorporatedPower Distribution Switches
SM04B-SRSS-TB
Header SR 1.0 SMT side entry, 1mm pitchJSTUncategorised
FSM4JSMATR
SMD-4P,6x6mm-40℃~+85℃ 1.6N 100,000 cycles 24V 50mA 5mm 6mm 6mm Gull Wing Round Button SPST-NO Surface Mount,Vertical Without Bracket SMD-4P,6x6mm Tactile Switches ROHSTE ConnectivityTactile Switches
PJ-202A
插件-25℃~+85℃ 2.5A 24V 2mm 6.5mm DC Power Jack Right Angle 插件 DC Power Connectors ROHSCUIDC Power Connectors
WS2812B
5mm X 5mm Surface Mount RGB LED with Intelligent ControlWorldsemiUncategorised
Parts
101| Qty | Value | Footprint | References |
|---|---|---|---|
| 21 | 1k | Resistor_SMD:R_0805_2012Metric | R1, R4, R10, R11, R12, R13, R14, R16, R17, R18, R19, R24, R31, R36, R37, R38 +5 |
| 12 | 0.1uF | Capacitor_SMD:C_0805_2012Metric | C3, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15 |
| 12 | ZXMS6004FF | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12 |
| 10 | 10k | Resistor_SMD:R_0805_2012Metric | R2, R15, R21, R23, R25, R28, R30, R33, R34, R35 |
| 8 | TestPoint | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP2, TP8, TP9, TP16, TP17, TP18, TP19, TP20 |
| 6 | 100k | Resistor_SMD:R_0805_2012Metric | R20, R22, R26, R27, R29, R32 |
| 6 | GREEN LED | LED_SMD:LED_0805_2012Metric | D1, D2, D3, D4, D5, D6 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3_Pad | H1, H2, H3, H4 |
| 3 | SM04B-SRSS | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J2, J3, J4 |
| 2 | 10uF | Capacitor_SMD:C_0805_2012Metric | C2, C4 |
| 2 | 8P8C | Connector_RJ:RJ45_Amphenol_54602-x08_Horizontal | J5, J6 |
| 2 | FSM4JSMATR | ISE_Generic:TE_FSM4JSMA | SW1, SW2 |
| 2 | Molex 0532610471 | Connector_Molex:Molex_PicoBlade_53261-0471_1x04-1MP_P1.25mm_Horizontal | J11, J12 |
| 1 | 0.07 | Resistor_SMD:R_2512_6332Metric | R3 |
| 1 | 1uF | Capacitor_SMD:C_0805_2012Metric | C16 |
| 1 | 68uF | Capacitor_SMD:CP_Elec_6.3x5.8 | C1 |
| 1 | 74HC4049 | Package_SO:SO-16_3.9x9.9mm_P1.27mm | U3 |
| 1 | AP7381-50 | Package_TO_SOT_SMD:SOT-89-3 | U1 |
| 1 | DRV8872DDA | Package_SO:Texas_HSOP-8-1EP_3.9x4.9mm_P1.27mm | U2 |
| 1 | INA219AxD | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U4 |
| 1 | PCA9555PW | Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm | U11 |
| 1 | PJ-202A | ISE_Generic:CUI_PJ-202A | J1 |
| 1 | ProMicro | ISE_Generic:ProMicro | U5 |
| 1 | WS2812B | LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D7 |
Questions
How big is the Mss cascade basic testjig PCB?
It measures 101.6 × 120.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Mss cascade basic testjig use?
101 parts, built around the DRV8872DDA, 74HC4049D, AP7381-50Y and PCA9555PW. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Mss cascade basic testjig KiCad files?
From the IowaScaledEngineering/mss-cascade repository on GitHub, at the commit this page was made from: the board is kicad/mss-cascade-basic-testjig/mss-cascade-basic-testjig.kicad_pcb and its schematic kicad/mss-cascade-adv/mss-cascade-adv.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Mss cascade basic testjig design in my own project?
Its repository states no licence, so its author keeps all rights: ask IowaScaledEngineering before reusing the design.
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