4 layers92 × 92 mm
4 layers92 × 92 mm
Rtihu
AMSAT-NA/PacSatDocs4- Size
- 92 × 92 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 395
- Nets
- 423
- Pads
- 1,476
- Tracks, vias
- 3,946, 888
- Pours
- 11
- Routed
- Yes
- KiCad
- KiCad 5 (file 20170123)
- Created
- 29 Sep 2022
- Updated
- 29 Apr 2026
Overview
Rtihu is an open-source printed circuit board by AMSAT-NA, from the AMSAT-NA/PacSatDocs repository on GitHub. It is a 4-layer board of 92 × 92 mm with 395 parts on 423 nets, routed with 3,946 tracks and 888 vias.
It is built around the MMZ09312BT1, MAX31725MTA+ and MR25H40DF, with the SN74CBTLV3245APW, FPF2001CT and DS28E83Q+T among its other parts. Its parts include 111 capacitors, 67 resistors, 40 ICs, 37 inductors and 10 diodes.
Main components
12
MMZ09312BT1
QFN-12-EP(3x3)-15dB -18dB 100MHz~400MHz 29.6dBm 31.7dB 3V~5V 42dBm 4dB 74mA Built-in power detector、Linearization design、Bias control circuit QFN-12-EP(3x3) RF Amplifiers ROHSNXP SemiconductorsRF Amplifiers
MAX31725MTA+
TDFN-8(3x3)-55℃~+150℃ 16bit 2.5V~3.7V 50ms I2C ±0.5℃ TDFN-8(3x3) Temperature Sensors ROHSMaxim Integrated (Analog Devices)Temperature Sensors
MR25H40DF
DFN-8-EP(5x6)0℃~+70℃ 4Mbit SPI DFN-8-EP(5x6) Random Access Memory (RAM) ROHSEverspin TechRandom Access Memory (RAM)
SN74CBTLV3245APW
TSSOP-20-40℃~+85℃ 2.3V~3.6V 250ps 4.7ns 6.4ns 8Ω TSSOP-20 Analog Switches, Multiplexers ROHSTexas InstrumentsSignal Switches, Multiplexers, Decoders
FPF2001CT
--40℃~+85℃ 1 1.8V~5.5V 100mA 700mΩ Active Low Low Side Switch Under-voltage lockout、Overcurrent Protection、Over temperature protection、Short-Circuit Protection - Power Distribution Switches ROHSonsemiPower Distribution Switches
DS28E83Q+T
TDFN-6(3x3)TDFN-6(3x3) Security Verification / Encryption ICs ROHSMaxim Integrated (Analog Devices)Security Verification / Encryption ICs
MAX3051EKA
UncategorisedMaxim Integrated Products
STWD100NYWY3F
SOT-23-5-40℃~+125℃@(TA) 1 13uA 2.7V~5.5V 210ms Active Low Open-drain Watchdog timer、Manual reset input SOT-23-5 Supervisor and Reset ICs ROHSSTMicroelectronicsSupervisor And Reset ICs
LT1963AEQ
TO-263-5Adjustable, 1.5A, Fast Transient Response, LDO RegulatorAnalog DevicesUncategorised
SN74AC00D
SOIC-14-40℃~+85℃ 2 2.1V~3.85V 2.4V、3.7V、4.7V 24mA 24mA 2V~6V 2uA 4 500mV、500mV、500mV 74AC Series 7ns@5V,50pF 900mV~1.65V NAND Gate SOIC-14 Logic Gates ROHSTexas InstrumentsLogic GatesSN74AC74D
SOIC-14-40℃~+85℃ 1 160MHz 2 24mA 24mA 2V~6V 2uA 3ns 3pF 500ps 6ns@5V,50pF 74AC Series Complementary D-Type Rising Edge Set and Reset SOIC-14 Flip Flops ROHSTexas InstrumentsFlip Flops
QSH-030-01-L-D-A
SMD,P=0.5mm-55℃~+125℃ 0.5mm 175V 2 2A 60P Gold Phosphor bronze Surface Mount,Vertical SMD,P=0.5mm Board-to-Board and Backplane Connector ROHSSamtecBoard-To-Board And Backplane Connector
Parts
395| Qty | Value | Footprint | References |
|---|---|---|---|
| 39 | 100n | Capacitors_SMD:C_0603 | C1, C2, C3, C4, C5, C42, C43, C44, C45, C46, C47, C48, C49, C50, C104, C105 +23 |
| 16 | 0R | Resistors_SMD:R_0603 | R6, R7, R8, R9, R13, R28, R34, R35, R40, R41, R42, R43, R48, R49, R54, R55 |
| 12 | 1u | Capacitors_SMD:C_0603 | C14, C18, C40, C41, C69, C73, C102, C103, C108, C109, C110, C111 |
| 12 | RF_SHIELD_PAD | amsat_misc:RF_SHIELD_PAD | SH1, SH2, SH3, SH4, SH5, SH6, SH7, SH8, SH9, SH10, SH11, SH12 |
| 10 | 3k3 | Resistors_SMD:R_0603 | R1, R2, R3, R20, R22, R23, R24, R37, R38, R39 |
| 8 | 1k | Resistors_SMD:R_0603 | R60, R61, R62, R63, R64, R65, R66, R67 |
| 8 | 270 | Resistors_SMD:R_0603 | R10, R15, R16, R17, R25, R26, R27, R36 |
| 8 | 4p3 | Capacitors_SMD:C_0603 | C10, C12, C27, C28, C65, C67, C82, C83 |
| 8 | NS | Capacitors_SMD:C_0603 | C13, C17, C19, C20, C68, C72, C74, C75 |
| 6 | 100n | amsat_murata:L_0603 | L1, L14, L15, L19, L32, L33 |
| 6 | 10k | Resistors_SMD:R_0603 | R44, R45, R52, R53, R56, R57 |
| 6 | 10n | Capacitors_SMD:C_0603 | C29, C30, C31, C84, C85, C86 |
| 6 | 10p | Capacitors_SMD:C_0603 | C21, C76, C98, C99, C100, C101 |
| 6 | 43n | amsat_murata:L_0603 | L2, L12, L13, L20, L30, L31 |
| 6 | SN74CBTLV3245A | amsat_ti:RGY_R-PVQFN-N20 | U13, U14, U15, U16, U19, U20 |
| 5 | 4u7 | Capacitors_SMD:C_0603 | C25, C80, C89, C90, C96 |
| 5 | FPF2001 | TO_SOT_Packages_SMD:SC-70-5 | U29, U30, U37, U38, U39 |
| 4 | 0R | amsat_murata:L_0603 | L7, L16, L25, L34 |
| 4 | 12n | amsat_murata:L_0603 | L6, L8, L24, L26 |
| 4 | 16M | amsat_abracon:Crystal_SMD_ABM9 | Y1, Y2, Y3, Y4 |
| 4 | 27n | amsat_murata:L_0603 | L10, L11, L28, L29 |
| 4 | 4.7k | Resistors_SMD:R_0603 | R50, R51, R58, R59 |
| 4 | 470n | Capacitors_SMD:C_0603 | C32, C33, C106, C107 |
| 4 | 4k7 | Resistors_SMD:R_0603 | R11, R12, R29, R31 |
| 4 | 5p6 | Capacitors_SMD:C_0603 | C11, C26, C66, C81 |
| 4 | CUBESAT_MOUNT_HOLE | amsat_misc:CUBESAT_MOUNT_HOLE | H1, H2, H3, H4 |
| 4 | MAX4995 | TO_SOT_Packages_SMD:SOT-23-6 | U6, U7, U34, U35 |
| 4 | RED | LEDs:LED_0603 | D1, D4, D8, D9 |
| 4 | SMA | amsat_misc:MMCX | P1, P2, P3, P4 |
| 3 | 15u | Capacitors_SMD:C_0603 | C87, C88, C95 |
| 3 | 3u3 | amsat_murata:L_0603 | L35, L36, L37 |
| 3 | 45k8 1% | Resistors_SMD:R_0603 | R19, R46, R47 |
| 2 | 1000p | Capacitors_SMD:C_0603 | C34, C35 |
| 2 | 100p | Capacitors_SMD:C_0603 | C15, C70 |
| 2 | 10u | Capacitors_SMD:C_0603 | C36, C37 |
| 2 | 11p | Capacitors_SMD:C_0603 | C24, C79 |
| 2 | 18n | amsat_murata:L_0603 | L4, L22 |
| 2 | 1k5 | Resistors_SMD:R_0603 | R5, R33 |
| 2 | 1n2 | amsat_murata:L_0603 | L5, L23 |
| 2 | 22u | Capacitors_SMD:C_0603 | C38, C39 |
| 2 | 24k | Resistors_SMD:R_0603 | R14, R30 |
| 2 | 330R | Resistors_SMD:R_0603 | R4, R32 |
| 2 | 3n9 | amsat_murata:L_0603 | L9, L27 |
| 2 | 3p9 | Capacitors_SMD:C_0603 | C22, C77 |
| 2 | 3u3 | Inductors_SMD:L_1210 | L17, L18 |
| 2 | 470p | Capacitors_SMD:C_0603 | C16, C71 |
| 2 | 4n7 | amsat_murata:L_0603 | L3, L21 |
| 2 | 5p1 | Capacitors_SMD:C_0603 | C23, C78 |
| 2 | AX5043 | amsat_onsemi:QFN28 | U3, U26 |
| 2 | CONN_02X05 | amsat_samtec:FTSH-105-01-L-DV-K | J3, J4 |
| 2 | DS28E83 | amsat_maxim:TDFN_T633_2 | U18, U32 |
| 2 | Disable Watchdog | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | JP1, JP2 |
| 2 | GRN | LEDs:LED_0603 | D3, D6 |
| 2 | LT1963A-3.3 | Housings_SOIC:SOIC-8_3.9x4.9mm_Pitch1.27mm | U27, U31 |
| 2 | MAX1556A | amsat_maxim:TDFN_T1033_1 | U4, U5 |
| 2 | MAX3051 | amsat_maxim:MAX-SOIC-8 | U8, U22 |
| 2 | MAX31725 | amsat_maxim:TDFN_T833_2 | U9, U23 |
| 2 | MM4148 | Diodes_SMD:D_SOD-123 | D7, D10 |
| 2 | MMZ09312BT1 | amsat_nxp:QFN12 | U2, U25 |
| 2 | MR25H40 | amsat_everspin:MR2xH40_DFN_SmallFlag | U10, U24 |
| 2 | STWD100NYWY3F | TO_SOT_Packages_SMD:SOT-23-5 | U33, U36 |
| 2 | TMS570LS0914PGE | amsat_ti:TQFP-144_20x20mm_Pitch0.5mm | U1, U21 |
| 2 | YEL | LEDs:LED_0603 | D2, D5 |
| 1 | 143k 1% | Resistors_SMD:R_0603 | R18 |
| 1 | DNP | Resistors_SMD:R_0603 | R21 |
| 1 | LT1963A | Housings_SOIC:SOIC-8_3.9x4.9mm_Pitch1.27mm | U28 |
| 1 | MAX14932 | Housings_SOIC:SOIC-16_3.9x9.9mm_Pitch1.27mm | U17 |
| 1 | QSH-030-01-L-D-A | amsat_samtec:QSH-030-01-L-D-A | J1 |
| 1 | QTH-030-02-L-D-A | amsat_samtec:QTH-030-02-L-D-A | J2 |
| 1 | SN74AC00 | Housings_SSOP:SSOP-14_5.3x6.2mm_Pitch0.65mm | U11 |
| 1 | SN74AC74 | Housings_SSOP:SSOP-14_5.3x6.2mm_Pitch0.65mm | U12 |
| 1 | SN74LVC1G04-Q1 | TO_SOT_Packages_SMD:SOT-23-5 | U40 |
The 295 most common of 395 parts.
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To use the board templates, set KICADUSERTEMPLATEDIR by:
145 parts
Questions
How big is the Rtihu PCB?
It measures 92 × 92 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Rtihu use?
395 parts, built around the MMZ09312BT1, MAX31725MTA+, MR25H40DF and SN74CBTLV3245APW. 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 Rtihu KiCad files?
From the AMSAT-NA/PacSatDocs repository on GitHub, at the commit this page was made from: the board is reference/rt-ihu/v1.1/pcb/rtihu.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Rtihu design in my own project?
Its repository states no licence, so its author keeps all rights: ask AMSAT-NA before reusing the design.