STM32G0C1NET3 datasheet(84/159 Pages) STMICROELECTRONICS

84 / 159 page

Electrical characteristics

STM32G0C1xC/xE

84/159

DS13564 Rev 4

Figure 19. Low-speed external clock source AC timing diagram

High-speed external clock generated from a crystal/ceramic resonator

The high-speed external (HSE) clock can be supplied with a 4 to 48 MHz crystal/ceramic

resonator oscillator. All the information given in this paragraph are based on design

simulation results obtained with typical external components specified in Table 42. In the

application, the resonator and the load capacitors have to be placed as close as possible to

the oscillator pins in order to minimize output distortion and startup stabilization time. Refer

to the crystal resonator manufacturer for more details on the resonator characteristics

(frequency, package, accuracy).

MS19215V2

VLSEH

tf(LSE)

90%

10%

TLSE

tr(LSE)

VLSEL

tw(LSEH)

tw(LSEL)

Table 42. HSE oscillator characteristics(1)

Symbol

Parameter

Conditions(2)

Min

Typ

Max

Unit

fOSC_IN

Oscillator frequency

MHz

Feedback resistor

200

kΩ

IDD(HSE)

HSE current consumption

During startup(3)

5.5

VDD = 3 V,

Rm = 30 Ω,

CL = 10 pF@8 MHz

-0.44

VDD = 3 V,

Rm = 45 Ω,

CL = 10 pF@8 MHz

-0.45

VDD = 3 V,

Rm = 30 Ω,

CL = 5 pF@48 MHz

-0.68

VDD = 3 V,

Rm = 30 Ω,

CL = 10 pF@48 MHz

-0.94

VDD = 3 V,

Rm = 30 Ω,

CL = 20 pF@48 MHz

-1.77

Maximum critical crystal

transconductance

Startup

1.5

mA/V

tSU(HSE)(4) Startup time

VDD is stabilized

1. Guaranteed by design.

2. Resonator characteristics given by the crystal/ceramic resonator manufacturer.

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