SPC560D30X datasheet(56/90 Pages) STMICROELECTRONICS

56 / 90 page

Electrical characteristics

SPC560D30x, SPC56040Dx

56/90

Doc ID 16315 Rev 7

Figure 10.

Fast external crystal oscillator (4 to 16 MHz) timing diagram

Table 36.

Crystal description

Nominal

frequency

(MHz)

NDK crystal

reference

Crystal

equivalent

series

resistance

(ESR)



Crystal

motional

capacitance

(Cm) fF

Crystal

motional

inductance

(Lm) mH

Load on

xtalin/xtalout

C1 =C2 (pF)

(1)

Shunt

capacitance

between xtalout

and xtalin

C0(2) (pF)

NX8045GB

300

2.68

591.0

2.93

NX5032GA

300

2.46

160.7

3.01

150

2.93

86.6

2.91

120

3.11

56.5

2.93

120

3.90

25.3

3.00

The values specified for C1 and C2 are the same as used in simulations. It should be ensured that the testing includes all

the parasitics (from the board, probe, crystal, etc.) as the AC / transient behavior depends upon them.

The value of C0 specified here includes 2 pF additional capacitance for parasitics (to be seen with bond-pads, package,

etc.).

VFXOSCOP

TFXOSCSU

VXTAL

VFXOSC

valid internal clock

90%

10%

1/fFXOSC

S_MTRANS bit (ME_GS register)

‘1’

‘0’

Table 37.

Fast external crystal oscillator (4 to 16 MHz) electrical characteristics

Symbol

Parameter

Conditions(1)

Value

Unit

Min

Typ

Max

fFXOSC

SR —

Fast external crystal

oscillator frequency

—4.0

—

16.0

MHz

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