VL53L4CX datasheet(5/38 Pages) STMICROELECTRONICS

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1.4

Application schematic

The following figure shows the application schematic of the VL53L4CX.

Figure 3. VL53L4CX schematic

Capacitors on external supply AVDD should be placed as close as possible to the AVDDVCSEL and AVSSVCSEL

module pins.

External pull up resistor values can be found in I2C-bus specification. Pull-ups are typically fitted only once per

bus, near the host. For suggested values see Table 3. Suggested pull-up and series resistors for I²C fast mode

and Table 4. Suggested pull-up and series resistors for I²C fast mode plus.

XSHUT pin must always be driven to avoid leakage current. A pull-up is needed if the host state is not known.

XSHUT is needed to use hardware standby mode (no I²C communication).

XSHUT and GPIO1 pull-up recommended values are 10 kOhms.

GPIO1 should be left unconnected if not used.

The following tables list recommended values for pull-up and series resistors for an AVDD of 1.8 V to 2.8 V in I²C

fast mode (up to 400 kHz) and fast mode plus (up to 1 MHz).

Table 3. Suggested pull-up and series resistors for I²C fast mode

I²C load capacitance (CL)(1)

Pull up resistor (Ohms)

Series resistor (Ohms)

CL ≤ 90 pF

3.6 k

90 pF < CL ≤ 140 pF

2.4 k

140 pF < CL ≤ 270 pF

1.2 k

270 pF < CL ≤ 400 pF

0.8 k

1. For each bus line, CL is measured in application PCB by customer.

VL53L4CX

Application schematic

DS13805 - Rev 3

page 5/38

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