SiFli Chip Model Guide

Chip numbering rule: SF32LB5xyZxYx6

Prefix: SF32LB5xy

  • SF: Chip series

    • SiFli, company logo

    • There is also an SSxxxx series, which is not included here for now

  • 32: Chip series

    • 32: 32-bit MCU series

    • 30: PMU series; subsequent models in this series are all digits, such as SF30147, and do not follow the numbering rules below

  • LB: Series attribute

    • LB：Low-power Bluetooth MCU

    • VB: Bluetooth MCU using a RISC-V processor

  • 5: Processor series

    • 5: Based on a 32-bit Arm Cortex-M33 Star-MC1 processor, or a RISC-V processor with similar computing performance

    • 0: Based on a 32-bit Arm Cortex-M0+ processor

  • x: High-, mid-, and low-end positioning

    • 8: Flagship product in the 5x series

    • 6/5: Mid-range product in the 5x series

    • 2: Cost-effective product in the 5x series

  • y: product positioning within the series

    • Generally determined based on the capacity of the internally packaged PSRAM; the specific number depends on the specific chip

Suffix: ZxYx6

  • Z: package

    • U: QFN package

    • V: BGA package

  • xYx: capacity code for internally packaged NOR Flash or PSRAM; the number of characters and combinations depend on the specific package

    • x is a digit: internally packaged NOR Flash capacity

      • 1：2Mb

      • 2：4Mb

      • 3：8Mb

      • 4：16Mb

      • 5：32Mb

      • 6：64Mb

    • X is a letter: internally packaged PSRAM capacity

      • A：16Mb QPI-PSRAM

      • B：32Mb OPI-PSRAM

      • C：64Mb OPI-PSRAM

      • D：128Mb OPI/HPI-PSRAM

      • E：256Mb HPI-PSRAM

  • 6: temperature range

    • 5：-20~70C

    • 6：-40~85C

Important

Note that the company’s official name is SiFli, with S and F uppercase and the rest lowercase, meaning Silicon Fli (Fly); Sifli, sifli, and SiFLi are all incorrect spellings.

Note

Abbreviated Terms Used Below

  • NOR:   QSPI NOR Flash

  • QPI-P:   x4-PSRAM

  • OPI-P:   x8-PSRAM

  • HPI-P:   x16-PSRAM

List of Key SF32LB52x/X Series Models

  • SF32LB52x/X：

    • x is a digit, indicating the lithium-ion battery powered series, such as SF32LB520/3/5/7, which are pin-to-pin compatible with each other

    • X is certain letters, indicating the standard 3.3 V power supply series, including SF32LB52B/E/G/J, which are pin-to-pin compatible with each other

    • X is certain letters, indicating the special 1.8 V power supply series, including SF32LB52D, for ultra-low-power scenarios

    • The two series, one where x is a digit and the other where X is a letter, are independent of each other and are not pin-to-pin compatible. Although the 3.3 V models and 1.8 V models can be pin-to-pin aligned, their voltages are incompatible, so they are also incompatible. The correspondence in terms of co-packaged content is:

      • Li-ion  3.3 V  1.8 V

      • 520 – 52B

      • 523 – 52E – 52D

      • 525 – 52G

      • 527 – 52J

  • The SF32LB52x series supports the following display interfaces

    • SPI/DSPI/QSPI, including the SPI interface for e-paper displays

    • 8080-8bit

Part #

520U36

523UB6

525UC6

527UD6

52BU36

52BU56

52DUB6

52EUB6

52GUC6

52JUD6

Package

QFN68L

QFN68L

QFN68L

QFN68L

QFN68L

QFN68L

QFN68L

QFN68L

QFN68L

QFN68L

Sizes

7x7x0.85 mm

7x7x0.85 mm

7x7x0.85 mm

7x7x0.85 mm

7x7x0.85 mm

7x7x0.85 mm

7x7x0.85 mm

7x7x0.85 mm

7x7x0.85 mm

7x7x0.85 mm

Pitch

0.35mm

0.35mm

0.35mm

0.35mm

0.35mm

0.35mm

0.35mm

0.35mm

0.35mm

0.35mm

# of GPIOs

44

44

44

44

45

45

45

45

45

45

MPI1 SiP

1MB NOR

4MB OPI-P

8MB OPI-P

16MB OPI-P

1MB NOR

4MB NOR

4MB OPI-P

4MB OPI-P

8MB OPI-P

16MB OPI-P

Power Supply

3.2~4.7V

3.2~4.7V

3.2~4.7V

3.2~4.7V

3.3V

3.3V

1.8V

3.3V

3.3V

3.3V

I/O Voltage

3.3V

3.3V

3.3V

3.3V

3.3V/1.8V

3.3V/1.8V

3.3V/1.8V

3.3V/1.8V

3.3V/1.8V

3.3V/1.8V

Temperature

-40~85C

-40~85C

-40~85C

-40~85C

-40~85C

-40~85C

-40~85C

-40~85C

-40~85C

-40~85C

List of Key SF32LB56x Series Models

  • The SF32LB56x series supports the following display interfaces

    • DPI/RGB888, RGB565 (566VCB36 and 567VND36)

    • SPI/DSPI/QSPI, including the SPI interface for e-paper displays

    • 8080-8bit (566VCB36 and 567VND36QFN68L only; not fully pinned out on QFN models)

Part #

560UNN26

561UBN26

563UCN26

56WUND26

566VCB36

567VND36

Package

QFN68L

QFN68L

QFN68L

QFN68L

BGA175

BGA175

Sizes

7x7x0.75 mm

7x7x0.75 mm

7x7x0.75 mm

7x7x0.75 mm

6.1x6.5x0.94 mm

6.1x6.5x0.94 mm

Pitch

0.35mm

0.35mm

0.35mm

0.35mm

0.4mm

0.4mm

HCPU GPIOs

24

24

24

24

79

79

LCPU GPIOs

20

20

20

20

41

41

MPI5 Boot SiP

512KB NOR

512KB NOR

512KB NOR

512KB NOR

1MB NOR

1MB NOR

MPI1 SiP

n/a

4MB OPI-P

8MB OPI-P

n/a

8MB OPI-P

n/a

MPI2 SiP

n/a

n/a

n/a

16MB OPI-P

4MB OPI-P

16MB OPI-P

Display Interface

QSPI

QSPI

QSPI

QSPI

DPI/QSPI/8080/JDI

DPI/QSPI/8080/JDI

Power Supply

1.71~3.63V

1.71~3.63V

1.71~3.63V

1.71~3.63V

1.71~3.63V

1.71~3.63V

Temperature

-40~85C

-40~85C

-40~85C

-40~85C

-40~85C

-40~85C

List of Key SF32LB58x Series Models

  • All SF32LB58x series models support the following display interfaces

    • MIPI-DSI, CMD mode or Video mode

    • DPI/RGB888，RGB565

    • SPI/DSPI/QSPI, including the SPI interface for e-paper displays

    • 8080-8bit

    • JDI MIP display interface

    • Supports dual displays with different content via MIPI-DSI + SPI/DSPI/QSPI

Part #

580VNN36

581VCN36

583VCC36

585V5E56

586VDD36

587VEE56

Package

BGA256

BGA256

BGA256

BGA256

BGA256

BGA256

Sizes

6.5x8.5x0.94 mm

6.5x8.5x0.94 mm

6.5x8.5x0.94 mm

6.5x8.5x0.94 mm

6.5x8.5x0.94 mm

6.5x8.5x0.94 mm

Pitch

0.4mm

0.4mm

0.4mm

0.4mm

0.4mm

0.4mm

HCPU GPIOs

94

94

94

94

94

94

LCPU GPIOs

66

66

66

66

66

66

MPI5 Boot SiP

1MB NOR

1MB NOR

1MB NOR

4MB NOR

1MB NOR

4MB NOR

MPI1 SiP

n/a

8MB OPI-P

8MB OPI-P

4MB NOR

16MB HPI-P

32MB HPI-P

MPI2 SiP

n/a

n/a

8MB OPI-P

32MB HPI-P

16MB HPI-P

32MB HPI-P

Power Supply

1.71~3.63V

1.71~3.63V

1.71~3.63V

1.71~3.63V

1.71~3.63V

1.71~3.63V

Temperature

-40~85C

-40~85C

-40~85C

-40~85C

-40~85C

-40~85C

List of Key SF32LB55x Models

  • Because the SF32LB55x series was defined relatively early, its suffix numbers do not fully follow the above rules. Only 557V3DA6 uses the above suffix naming rules.

  • Models in the same package are pin-to-pin compatible.

  • Depending on the package, the SF32LB55x series supports all or some of the following display interfaces.

    • MIPI-DSI，CMD mode

    • DPI/RGB888，RGB565

    • SPI/DSPI/QSPI, including the SPI interface for e-paper displays

    • 8080-8bit

    • JDI/Sharp MIP display interface (557VD3A6)

    • Supports MIPI-DSI + SPI/DSPI dual displays with different content (557VD3A6)

Part #

SS6600A8

551U4O5

555V4O6

555V436

557VD3A6

Package

QFN68L

QFN68L

BGA145

BGA145

BGA169

Sizes

7x7x0.75 mm

7x7x0.75 mm

7x7x0.94 mm

7x7x0.94 mm

7x7x0.94 mm

Pitch

0.35mm

0.35mm

0.5mm

0.5mm

0.5mm

HCPU GPIOs

28

28

55

55

71

LCPU GPIOs

21

21

40

40

42

QSPI1-L Boot SiP

4MB NOR

4MB NOR

4MB NOR

4MB NOR

1MB NOR

QSPI1-H SiP

4MB NOR

n/a

n/a

n/a

n/a

PSRAM SiP

n/a

4MB OPI-P

4MB OPI-P

8MB OPI-P

16MB OPI-P

QSPI4 SiP

n/a

n/a

n/a

n/a

2MB QPI-P

Display Interface

QSPI/8080

QSPI/8080

MIPI/QSPI/8080

MIPI/QSPI/8080

MIPI/QSPI/8080/JDI

Power Supply

2.97V~3.63V

1.71~3.63V

1.71~3.63V

1.71~3.63V

1.71~3.63V

Temperature

-20~70C

-20~70C

-40~85C

-40~85C

-40~85C

Note

  • SS6600A8 integrates two 4 MB QSPI-NOR devices and is configured to operate as a single 8 MB OSPI-NOR device.

Chip Model Comparison Table

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Sample Availability

Retail samples and small quantities can be purchased directly on Taobao. Volume customers can email sales@sifli.com or contact customer service on Taobao to obtain sales contact information.

Participants in open source projects can apply for free samples. You can join QQ group 674699679 for discussion.