UMA1022M NXP Semiconductors, UMA1022M Datasheet - Page 12

• Manufacturer Part Number: UMA1022M
• Description: Low Cost Dual Frequency Synthesizer For Radio Telephones
• Manufacturer: NXP Semiconductors

Philips Semiconductors
SERIAL BUS TIMING CHARACTERISTICS
V
Note
1. The minimum pulse width (t
1998 Dec 09
handbook, full pagewidth
Serial programming clock; CLK
t
t
T
Enable programming; E
t
t
t
t
Register serial input data; DATA
t
t
r
f
START
END
W(min)
SU;E
SU;DAT
HD;DAT
DD
cy
Low cost dual frequency synthesizer for
radio telephones
SYMBOL
a) Main divider input frequency
b) Reference divider input frequency
CLK
DATA
= V
E
DDX
t START
= V
t SU;DAT
CCA
LSB
input rise time
input fall time
clock period
delay to rising clock edge
delay from last falling clock edge
minimum inactive pulse width
enable set-up time to next clock edge
input data to clock set-up time
input data to clock hold time
= V
CCB
= 3 V; T
W(min)
t HD;DAT
amb
f
) can be smaller than 1.5 s when the following conditions are fulfilled:
RF
PARAMETER
= 25 C; unless otherwise specified.
--------------- -
t
f
W(min)
xtal
Fig.3 Serial bus timing diagram.
383
--------------- -
t
W(min)
3
T cy
12
t f
MSB
100
100
20
1500
20
20
20
MIN.
t r
(1)
10
10
ADDRESS
TYP.
40
40
Product specification
UMA1022M
MAX.
t END t SU;E
t W(min)
ns
ns
ns
ns
ns
ns
ns
ns
ns
MGE628
UNIT