AN5373 · Application noteGetting started with STM32U5 MCU hardware development
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Conversion from UFBGA169 to TFBGA169 boards

Conversion from UFBGA169 to TFBGA169 boards

The UFBGA169 and TFBGA169 packages are compatible. However, it is important to note that the TFBGA169 balls have a larger diameter than the UFBGA169 balls, while the pitch of both packages is the same. To ensure compatibility between the two packages, STMicroelectronics recommends maintaining a 280 µm solder mask opening on the PCB. Additionally, customers must consider the height difference between the TFBGA169 and UFBGA169 packages when designing their application.

Pinout summary

Table 2. Pinout summary for STM32U5 devices
Pin name

LQFP48
UFQFPN48

LQFP64UFBGA64LQFP100UFBGA100UFBGA132LQFP144UFBGA169TFBGA169

LQFP48 SMPS
UFQFPN48 SMPS

WLCSP56 SMPSLQFP64 SMPSUFBGA64 SMPSWLCSP72 SMPSWLCSP90 SMPSLQFP100 SMPSLQFP100 DSI SMPSUFBGA100 SMPSUFBGA132 SMPSLQFP144 SMPSLQFP144 DSI SMPSUFBGA144 DSI SMPSWLCSP150 SMPSWLCSP150 DSI SMPSUFBGA169 SMPSTFBGA169 SMPSWLCSP208 DSI SMPSTFBGA216 DSI SMPS
Specific I/Os
PC14-OSC32_INX1XXXXXXXXXXXXXXXXXXXXXXXXXXX
PC15-OSC32_OUTXXXXXXXXXXXXXXXXXXXXXXXXXXXX
PH0-OSC_INXXXXXXXXXXXXXXXXXXXXXXXXXXXX
PH1-OSC_OUTXXXXXXXXXXXXXXXXXXXXXXXXXXXX
System pins
NRSTXXXXXXXXXXXXXXXXXXXXXXXXXXXX
PH3-BOOT0XXXXXXXXXXXXXXXXXXXXXXXXXXXX
Power pins
VBATXXXXXXXXXXXXXXXXXXXXXXXXXXXX
VDDUSB2oXXXXXXXXoXXXXXXXXXXXXXXXXXX
VSSA3oooXXoXoooooooooooooooooooXX
VREF-oooXXoXoooooooooooooooooooXX
VREF+4oooXXoXXXoooooXXoXXXXXXXXXXX
VDDAooXXXoXXXoooooXXXXXXXXXXXXXX
VDDIO2-5----XXXX----XX---XX--XXXXXX
VDD11---------XXXXXXXXXXXX-XXXXXX
VDDSMPS---------XXXXXXXXXXXXXXXXXXX
VSSSMPS---------XXXXXXXXXXXXXXXXXXX
VLXSMPS---------XXXXXXXXXXXXXXXXXXX
VCAPXXXXXXXXX-------------------
VDDDSI----------------X---XX-X--XX
VDD11DSI----------------X---XX-X--XX
VSSDSI----------------X---XX-X--XX
VDD11USB-----------------------X--XX
Number of VDD33355691010333444595691089910101710
Number of VSS3445561111113433645766111012121011111920
CAUTION: Packages with and without SMPS are not compatible, in almost all power supply pins of Table 2 Pinout summary for STM32U5 devices.

Example: VDDIO2 is the pin number 130 on SMPS package. Pin 130 on the package without SMPS is mapped to a VSS pin. It means that the system is short‑circuited when a legacy package is mounted on an SMPS socket.

1 'X' means that the pin is present.
2 'o' means that VDD and VDDUSB are internally connected and available on a single pin.
3 'o' means that VSSA and VREF- are internally connected and available on a single pin.
4 'o' means that VDDA and VREF+ are internally connected and available on a single pin.
5 '-' means that the pin is absent.