OM8373 datasheet(65/108 Pages) PHILIPS

65 / 108 page

2004 Jan 15

Philips Semiconductors

Tentative Device Speciﬁcation

TV signal processor-Teletext decoder with

embedded

µ-Controller

OM8373; OM8378

Note

1. Peripheral current is dependent on external components and voltage levels on I/Os

2. The simplified circuit diagram of the oscillator is given in Fig.22.

A suitable crystal for this oscillator is the Saronix type 9922 520 00169. The nominal tuning of the crystal is important

to obtain a symmetrical catching range for the PLL in the colour decoder. This tuning can be adapted by means of

the values of the capacitors Cx1 and Cx2 in Fig.22. Good results were obtained with capacitor values of 39 pF,

however, for a new application the optimum value should be determined by checking the symmetry of the catching

range of the colour decoder.

P0.5 AND P0.6

IO.2.1

low level input voltage

−−

0.8

IO.2.2

high level input voltage

2.0

−

5.5

IO.2.3

hysteresis of Schmitt Trigger

input

0.4

−

0.7

IO.2.4

low level output voltage

IOL = 8mA

−−

0.4

IO.2.5

high level output voltage

open drain

−−

5.5

IO.2.6

high level output voltage

IOH = 8mA

2.4

−−

IO.2.7

output rise time (push-pull only)

10% to 90%

load 100 pF

−

IO.2.8

output fall time 10% to 90%

load 100pF

−

IO.2.9

load capacitance

−−

100

IO.2.10

capacitance of input pin

−−

P1.6 AND P1.7

IO.3.1

low level input voltage (VIL)

−−

1.5

IO.3.2

high level input voltage (VIH)

3.0

−

5.5

IO.3.3

hysteresis of Schmitt-trigger

input

0.2

−−

IO.3.4

low level output voltage

sink current 8mA

−

0.4

IO.3.5

high level output voltage

open drain

−−

5.5

IO.3.6

output fall time (VIH to VIL for CL)

20+0.1

−

250

IO.3.7

bus load capacitance

−

400

IO.3.8

capacitance of IO pin

−−

Crystal oscillator

OSCIN

; NOTE 2

X.1.1

resonator frequency

−

MHz

X.1.2

input capacitance (Ci)

−

4.0

−

X.1.3

output capacitance (Co)

−

5.0

−

X.1.4

Cx1 =Cx2

−

X.1.5

Ri (crystal)

−−

100

Ω

NUMBER

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

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