Chips
Microcontroller RP2040 QFN-56
| Reference | Package | Value | Quantity | Rating | Note |
|---|---|---|---|---|---|
| U103 | QFN-56 | RP2040 | 1 |
Raspberry Pi RP2040 microcontroller in QFN-56 package.
Flash 128Mbit SPI SOIC8-208mil
| Reference | Package | Value | Quantity | Rating | Note |
|---|---|---|---|---|---|
| U102 | SOIC8-208mil | 128Mbit SPI/QSPI flash (W25Q128JVSIQ) | 1 |
128Mbit SPI flash in SOIC8-208mil package, QSPI support required.
- W25Q128JVSIQ (Winbond)
- XM25QH128A
NAND Flash 1Gbit SPI UPDFN-8
| Reference | Package | Value | Quantity | Rating | Note |
|---|---|---|---|---|---|
| U105 | UPDFN-8 | 1Gbit SPI NAND flash (MT29F1G01ABAFDWB-IT:F) | 1 |
1Gbit SPI NAND flash with EEC in UPDFN-8 package. Larger sizes (up to 8Gbit) are available, but are not currently supported by the firmware.
- REV10+ replaces removable flash socket with onboard NAND flash to improve shared SPI bus speed
- MT29F1G01ABAFDWB-IT:F (Micron)
74LVC1T45 bi-directional buffer SC70-6/SOT363
| Reference | Package | Value | Quantity | Rating | Note |
|---|---|---|---|---|---|
| U301 U302 U303 U304 U305 U306 U307 U308 | SC70-6/SOT363 | 74LVC1T45 | 8 |
74LVC1T45 is available from TI, Nexperia, Diodes INC and a few Chinese domestic producers. We are currently using logic chips from WuXi I-Core due to price, availability and the lowest operating voltage (>1.2volts) available.
- REV10+ changed TI SN74LVC1T45 to WuXi I-Core AIP74LVC1T45
- 74LVC1T45DW-7 (Diodes INC)
- 74LVC1T45GW,125 (Nexperia)
- SN74LVC1T45DCK (TI)
- AIP74LVC1T45GC363 (WuXi I-Core)
CD4067 analog mux TSSOP-24
| Reference | Package | Value | Quantity | Rating | Note |
|---|---|---|---|---|---|
| U402 | TSSOP-24 | CD4067 | 1 | tPHL ~30ns (60ns max) @ 5V |
Multiple manufacturers make an updated CD4067 that is much faster than old CD logic, and even faster than older 74HC/74HCT. The high to low (and low to high) propagation delay should be in the neighborhood of 30ns (60ns max) at 5 volts.
- REV10+ changed Nexperia 74HC4067 to WuXi I-Core CD4067
We are currently using logic chips from WuXi I-Core due to price and availability. A part with an identical die is also available from HGSemi.
74HC4067 or 74HCT4067 can be used, but CD4067 is much cheaper and more available. Just be sure that the CD4067 is an updated version, not an original 1970-1990 vintage part.
Example:
74HC595 shift register TSSOP-16
| Reference | Package | Value | Quantity | Rating | Note |
|---|---|---|---|---|---|
| U501, U502 | TSSOP-16 | 74HC595 | 2 |
Must be the “HC” version. The “HCT” version will NOT work. Any manufacturer.
- REV10+ changed Nexperia 74HC595 to WuXi I-Core 74HC595
We are currently using logic chips from WuXi I-Core due to price and availability.
Must use “HC” version
Example:
- 74HC595T16-13 (Diodes INC)
- 74HC595PW,118 (Nexperia)
74HCT245 bus transceiver TSSOP-20
| Reference | Package | Value | Quantity | Rating | Note |
|---|---|---|---|---|---|
| U503 | TSSOP-20 | 74HCT245 | 1 |
Must be the “HCT” version. The “HC” version will NOT work. Any manufacturer.
- REV10+ changed Nexperia 74HCT245 to WuXi I-Core 74HCT245
We are currently using logic chips from WuXi I-Core due to price and availability.
Must use “HCT” version
Example:
- SN74HCT245PWR (TI)
- 74HCT245PW,118 (Nexperia)