M68ICS08GR datasheet(384/408 Pages) FREESCALE

384 / 408 page

Electrical Specifications

Technical Data

MC68HC908GR8 — Rev 4.0

384

Electrical Specifications

MOTOROLA

23.16.2 CGM Electrical Specifications

Description

Symbol

Min

Typ

Max

Unit

Operating voltage

VDD

2.7

—

5.5

Operating temperature

–40

125

Crystal reference frequency

fRCLK

32.768

100

kHz

Range nominal multiplier

fNOM

—

38.4

—

kHz

VCO center-of-range frequency(1)

1. 5.0 V

± 10% V

fVRS

38.4 k

—

40.0 M

Medium-voltage VCO center-of-range frequency(2)

2. 3.0 V

± 10% V

fVRS

38.4 k

—

40.0 M

VCO range linear range multiplier

—

255

VCO power-of-two range multiplier

—

VCO multiply factor

—

4095

VCO prescale multiplier

118

Reference divider factor

VCO operating frequency

fVCLK

38.4 k

—

40.0 M

Bus operating frequency(1)

fBUS

——

8.2

MHz

Bus frequency @ medium voltage(2)

fBUS

——

4.1

MHz

Manual acquisition time

tLock

——

Automatic lock time

tLock

——

PLL jitter(3)

3. Deviation of average bus frequency over 2 ms. N = VCO multiplier.

—

fRCLK x

0.025%

x 2P N/4

External clock input frequency

PLL disabled

fOSC

—

32.8 M

External clock input frequency

PLL enabled

fOSC

30 k

—

1.5 M

Notes:

Freescale Semiconductor, Inc.

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