UMA1022M Datasheet, PDF (12/20 Pages) NXP Semiconductors – Low cost dual frequency synthesizer for radio telephones

Philips Semiconductors
Low cost dual frequency synthesizer for
radio telephones
Product specification
UMA1022M
SERIAL BUS TIMING CHARACTERISTICS
V_DD = V_DDX = V_CCA = V_CCB = 3 V; T_amb = 25 °C; unless otherwise specified.
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
Serial programming clock; CLK
t_r
input rise time
t_f
input fall time
T_cy
clock period
Enable programming; E
t_START
t_END
t_W(min)
t_SU;E
delay to rising clock edge
delay from last falling clock edge
minimum inactive pulse width
enable set-up time to next clock edge
Register serial input data; DATA
t_SU;DAT
t_HD;DAT
input data to clock set-up time
input data to clock hold time
−
10
40
ns
−
10
40
ns
100
−
−
ns
100
−
−
ns
20
−
−
ns
1500⁽¹⁾ −
−
ns
20
−
−
ns
20
−
−
ns
20
−
−
ns
Note
1. The minimum pulse width (t_W(min)) can be smaller than 1.5 µs when the following conditions are fulfilled:
a) Main divider input frequency f_RF > -t-_W--3---₍^8-_m--3--_i-_n--₎
b) Reference divider input frequency f_xtal > -t-_W-----₍^3-_m----_i-_n--₎
handbook, full pagew^tSidUth;DAT
CLK
DATA
LSB
E
tSTART
1998 Dec 09
tHD;DAT
Tcy
tf
tr
tEND tSU;E
MSB
ADDRESS
Fig.3 Serial bus timing diagram.
12
tW(min)
MGE628