2 layers101.6 × 120.7 mm
Mss cascade basic testjig
IowaScaledEngineering/mss-cascade
Integrated Cascade Module for Free-mo Modular Signal System
101 parts
2 layers82.6 × 76.2 mm
Mss cascade basic
IowaScaledEngineering/mss-cascadeIntegrated Cascade Module for Free-mo Modular Signal System
- Size
- 82.6 × 76.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 111
- Nets
- 65
- Pads
- 289
- Tracks, vias
- 714, 142
- Pours
- 10
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 14 Oct 2015
- Updated
- 31 Aug 2026
Overview
Mss cascade basic is an open-source printed circuit board by IowaScaledEngineering, from the IowaScaledEngineering/mss-cascade repository on GitHub. It is a 2-layer board of 82.6 × 76.2 mm with 111 parts on 65 nets, routed with 714 tracks and 142 vias.
It is built around the ATTINY861A-SU, 74HC4049D and AP7381-50Y, with the SM04B-SRSS-TB, SMAJ18A-TP and 1210L020WR among its other parts. Its parts include 34 resistors, 13 connectors, 12 capacitors, 10 diodes and 4 ICs. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
7
ATTINY861A-SU
SOIC-20-300mil-40℃~+85℃ 1.8V~5.5V 10bit 16 20MHz 512Byte 512Byte 8 Bit 8KB AVR Built-in FLASH SOIC-20-300mil Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontroller Units (MCUs/MPUs/SOCs)
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
SM04B-SRSS-TB
Header SR 1.0 SMT side entry, 1mm pitchJSTUncategorised
SMAJ18A-TP
SMA-55℃~+175℃ 13.7A@10/1000us 18V 1uA 22.1V 29.2V 400W@10/1000us TVS Unidirectional SMA ESD and Surge Protection (TVS/ESD) ROHSMicro Commercial ComponentsTVS
1210L020WR
1210-40℃~+85℃ 10A 200mA 20ms 30V 400mA 5Ω 600mW 800mΩ 1210 Resettable Fuses ROHSLittelfuseResettable Fuses
JS202011SCQN
SMD-40℃~+85℃ 300mA 5,000 cycles 5.5mm 6V DPDT Rectangular Columnar SMD(SMT) Tab Surface Mount,Vertical SMD Slide Switches ROHSC&KSlide Switches
Parts
111| Qty | Value | Footprint | References |
|---|---|---|---|
| 24 | 10k | Resistor_SMD:R_0805_2012Metric | R2, R3, R10, R11, R12, R13, R14, R15, R16, R26, R27, R28, R29, R30, R31, R32 +8 |
| 21 | TestPoint | TestPoint:TestPoint_Pad_D2.0mm | TP1, TP2, TP3, TP4, TP10, TP11, TP12, TP13, TP14, TP15, TP16, TP17, TP18, TP19, TP20, TP21 +5 |
| 10 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP8, JP9, JP10 |
| 8 | 0.1uF | Capacitor_SMD:C_0805_2012Metric | C3, C4, C5, C6, C7, C8, C9, C13 |
| 7 | 330 | Resistor_SMD:R_0805_2012Metric | R19, R20, R21, R22, R23, R24, R25 |
| 7 | CDBM140G | ISE_Generic:SOD-123T | D1, D2, D3, D4, D7, D8, D10 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3_Pad | H1, H2, H3, H4 |
| 3 | 1k | Resistor_SMD:R_0805_2012Metric | R1, R17, R18 |
| 3 | SM04B-SRSS | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J2, J3, J4 |
| 3 | Screw_Terminal_01x02 | TerminalBlock_MetzConnect:TerminalBlock_MetzConnect_Type059_RT06303HBWC_1x03_P3.50mm_Horizontal | J8, J9, J10 |
| 2 | 8P8C | Connector_RJ:RJ45_Amphenol_54602-x08_Horizontal | J5, J6 |
| 2 | Molex 0532610471 | Connector_Molex:Molex_PicoBlade_53261-0471_1x04-1MP_P1.25mm_Horizontal | J11, J12 |
| 2 | SMAJ18A-TP | Diode_SMD:D_SMA | D5, D6 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C11 |
| 1 | 1210L020WR | Resistor_SMD:R_1210_3225Metric | F1 |
| 1 | 1uF | Capacitor_SMD:C_0805_2012Metric | C12 |
| 1 | 22uF | Capacitor_SMD:C_0805_2012Metric | C2 |
| 1 | 4.7uH | ISE_UltraLibrarian:MSS6132-xxxMLC | L1 |
| 1 | 68uF | Capacitor_SMD:CP_Elec_6.3x5.8 | C1 |
| 1 | 74HC4049 | Package_SO:SO-16_3.9x9.9mm_P1.27mm | U3 |
| 1 | AP3012 | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | AP7381-50Y | ISE_Generic:SOT-89-3 | U1 |
| 1 | ATtiny861A-S | Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm | U2 |
| 1 | AVR-ISP | Connector:Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_Vertical | J7 |
| 1 | Conn_02x04_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical | J13 |
| 1 | GREEN LED | LED_SMD:LED_0805_2012Metric | D9 |
| 1 | JS202011SCQN | ISE_UltraLibrarian:SW_JS202011SCQN | SW1 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_RND:TerminalBlock_RND_205-00012_1x02_P5.00mm_Horizontal | J1 |
Questions
How big is the Mss cascade basic PCB?
It measures 82.6 × 76.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Mss cascade basic use?
111 parts, built around the ATTINY861A-SU, 74HC4049D, AP7381-50Y and SM04B-SRSS-TB. 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 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/mss-cascade-basic.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 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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