SPC56ECxx datasheet(79/123 Pages) STMICROELECTRONICS

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SPC564Bxx-SPC56ECxx

Electrical Characteristics

122

Figure 11. Fast external crystal oscillator (4 to 40 MHz) electrical characteristics

VFXOSCOP

TMXOSCSU

VXTAL

VFXOSC

valid internal clock

90%

10%

1/fMXOSC

S_MTRANS bit (ME_GS register)

Table 36. Fast external crystal oscillator (4 to 40 MHz) electrical characteristics

Symbol

Parameter

Conditions(1)

Value(2)

Unit

Min

Typ

Max

fFXOSC

SR —

Fast external

crystal oscillator

frequency

—4.0

—

40.0

MHz

gmFXOSC

CC C

Fast external

crystal oscillator

transconductance

VDD = 3.3 V ± 10%

4(3)

—20(3)

mA/V

VDD = 5.0 V ± 10%

6.5(3)

—25(3)

VFXOSC

CC T

Oscillation

amplitude at

EXTAL

fOSC = 40 MHz

For both VDD = 3.3 V ±

10%, VDD = 5.0 V ± 10%

—0.95

—

VFXOSCOP CC P

Oscillation

operating point

——

1.8

IFXOSC

(4)

CC T

Fast external

crystal oscillator

consumption

VDD = 3.3 V ± 10%,

fOSC = 40 MHz

—2

2.2

VDD = 5.0 V ± 10%,

fOSC = 40 MHz

—2.3

2.5

VDD = 3.3 V ± 10%,

fOSC = 16 MHz

—1.3

1.5

VDD = 5.0 V ± 10%,

fOSC = 16 MHz

—1.6

1.8

TFXOSCSU

CC T

Fast external

crystal oscillator

start-up time

fOSC = 40 MHz

For both VDD = 3.3 V ±

10%, VDD = 5.0 V ± 10%

——

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