UMA1021M datasheet(10/16 Pages) PHILIPS

Part #	UMA1021M

Description	Low-voltage frequency synthesizer for radio telephones

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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10 / 16 page

1999 Jun 17

10

Philips Semiconductors

Product speciﬁcation

Low-voltage frequency synthesizer

for radio telephones

UMA1021M

SERIAL BUS TIMING CHARACTERISTICS

VDD =VCC =3V; Tamb =25 °C; unless otherwise speciﬁed.

Note

1. The minimum pulse width (tW(min)) can be smaller than 4 µs provided all the following conditions are fulfilled:

a) Main divider input frequency

.

b) Reference divider input frequency

.

SYMBOL

PARAMETER

MIN.

TYP.

MAX.

UNIT

Serial programming clock; CLK

tr

input rise time

−

10

40

ns

tf

input fall time

−

10

40

ns

Tcy

clock period

100

−−

ns

Enable programming; E

tSTART

delay to rising clock edge

40

−−

ns

tEND

delay from last falling clock edge

−20

−−

ns

tW(min)

minimum inactive pulse width

4000(1)

−−

ns

tSU;E

enable set-up time to next clock edge

20

−−

ns

Register serial input data; DATA

tSU;DAT

input data to clock set-up time

20

−−

ns

tHD;DAT

input data to clock hold time

20

−−

ns

f

RF

447

t

Wmin

()

-------------------

>

f

xtal

3

t

Wmin

()

-------------------

>

Fig.3 Serial bus timing diagram.

handbook, full pagewidth

MGD565

MSB

LSB

ADDRESS

tSTART

tSU;DAT

tHD;DAT

Tcy

tr

tf

tW(min)

tEND tSU;E

CLK

DATA

E

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UMA1021M Datasheet(PDF) 10 Page - NXP Semiconductors

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