STM32W108CB datasheet(243/278 Pages) STMICROELECTRONICS

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STM32W108HB STM32W108CC STM32W108CB STM32W108CZ

Electrical characteristics

Doc ID 16252 Rev 14

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The POR LVcore and POR LVmem reset sources are merged to provide a single reset

source, POR LV, to the Reset Generation module, since the detection of either event needs

to reset the same system modules.

NRST pin

A single active low pin, NRST, is provided to reset the system. This pin has a Schmitt

triggered input.

To afford good noise immunity and resistance to switch bounce, the pin is filtered with the

Reset Filter module and generates the reset source RSTB to the Reset Generation module.

Reset filter time constant

Reset pulse width to guarantee a reset

Reset pulse width guaranteed not to cause a reset

14.3.3

Absolute maximum ratings (electrical sensitivity)

Based on three different tests (ESD, LU) using specific measurement methods, the device is

stressed in order to determine its performance in terms of electrical sensitivity.

Electrostatic discharge (ESD)

Electrostatic discharges (a positive then a negative pulse separated by 1 second) are

applied to the pins of each sample according to each pin combination. The sample size

depends on the number of supply pins in the device (3 parts × (n+1) supply pins). This test

conforms to the JESD22-A114/C101 standard.

Electrostatic discharge

voltage (human body model)

TA = +25 °C in

compliance with

JESD22-A114

Electrostatic discharge

voltage (human body model)

for RF pins

Electrostatic discharge

voltage (charge device

model) for all pins

Moisture sensitivity level

Table 52.

Reset filter specification for RSTB

Parameter

Min

Typ

Max

Unit

2.1

12.0

16.0

µs

26.0

–

µs

0–

1.0

µs

Table 53.

ESD absolute maximum ratings

Symbol

Parameter

Conditions

Class

Maximum value(1)

Based on characterization results, not tested in production.

Unit

VESD(HBM)

±2000(2)

Value valid for all devices and all pins except for the RF pins of the STM32W108CC and STM32W108CZ

devices.

±1100(3)

Value valid only for STM32W108CC and STM32W108CZ devices.

VESD(CDM)

TA = +25 °C in

compliance with

JESD22-A114

±500

MSL

––

MSL3

–

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