STR910FAM32 datasheet(66/101 Pages) STMICROELECTRONICS

66 / 101 page

Electrical characteristics

STR91xFAx3x, STR91xFAx4x

66/101

7.7.1

Main oscillator electrical characteristics

VDDQ = 2.7 - 3.6V, VDD = 1.65 - 2V, TA = -40 / 85 °C unless otherwise specified.

7.7.2

X1_CPU external clock source

Subject to general operating conditions for VDD and TA.

Figure 16.

Typical application with an external clock source

Table 18.

Main oscillator electrical characteristics

Symbol

Parameter

Test Conditions

Value

Unit

Min

Typ

Max

tSTUP(OSC) Oscillator Start-up Time

VDD stable

(1)

Data characterized with quartz crystal, not tested in production.

Table 19.

External clock characteristics

Symbol

Parameter

Test

Conditions(1)

Data based on typical appilcation software.

Value

Unit

Min

Typ

Max

fX1

External clock source

frequency

See Figure 16

425

MHz

VX1H

X1 input pin high level

voltage

0.7xVDD

VDD

VX1L

X1 input pin low level

voltage

VSS

0.3xVDD

tw(X1H)

tw(X1L)

X1 high or low time(2)

Data based on design simulation and/or technology characteristics, not tested in production.

6ns

tr(X1)

tf(X1)

X1 rise or fall time(2)

X1 input leakage current

VSS≤VIN≤VDD

±1

µA

CIN(X1)

X1 input capacitance(2)

5pF

DuCy(X1) Duty cycle

X1_CPU

X2_CPU

fOSC

EXTERNAL

STR91xF

CLOCK SOURCE

VX1L

VX1H

tr(T1)

tf(X1)

tw(X1H)

tw(X1L)

90%

10%

TX1

hi-Z

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