2.4

Application schematic

The following figure shows the application schematic of the VL53L4ED.

Figure 3. VL53L4ED schematic

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

AVSSVCSEL module pins.

The external pull-up resistor values can be found in the 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.

The 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 (there is no I²C communication).

The recommended value of the XSHUT and GPIO1 pull-up is 10 kohms.

The GPIO1 should be left unconnected if not used.

The following tables list recommended values for pull-up and series resistors. Values are 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 (àhms)

CL ≤ 90 pF

3.6 k

0

90 pF < CL ≤ 140 pF

2.4 k

0

140 pF < CL ≤ 270 pF

1.2 k

0

270 pF < CL ≤ 400 pF

0.8 k

0

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

VL53L4ED

Product overview

DS14256 - Rev 3

page 6/39