Texas Instruments CDCM7005, User Manual

Page: 9 / 34

CDCM7005 Functional Block Diagram
1-2
1.1 CDCM7005 Functional Block Diagram
PECL
to
LVCMOS
Progr. Delay
N
PECL
INPUT
CTRL_LE
CTRL_DATA
CTRL_CLK
VCXO_IN
CP_OUT
PLL_LOCK
STATUS_REF /
PRI_SEC_CLK
Bias Generator
VBB
VCC_CP
VCC
AVCC
GND
PRI_REF
SEC_REF
REF_SEL
RE
F_
M
U
X
LVCMOS
FB_MUX
LV
CMOS
Y0B
Y0A
LV
CMOS
LV
PECL
LV
CMOS
Y1B
Y1A
LV
CMOS
LV
PECL
LV
CMOS
Y2B
Y2A
LV
CMOS
LV
PECL
LV
CMOS
Y3B
Y3A
LV
CMOS
LV
PECL
LV
CMOS
Y4B
Y4A
LV
CMOS
LV
PECL
SPI LOGIC
Manual &
Automatic
CLK Select
Current
Reference
Reference
Clock
freq. detect
> 2 MHz
Selected REF Signal
Progr. Divider
N 2 12
Y
0_M
U
X
P Divider
÷ 3
÷ 4
÷ 6
/8
÷ 8
÷ 16
÷ 1
÷ 2
÷ 4
÷ 8
90
o
90
o
LOCK
Charge
Pump
PFD
HOLD
Y1
_M
U
X
Y2_
M
U
X
Y3_
M
U
X
Y4
_M
UX
P16 − Div
freq. detect
> 2 MHz
Progr. Delay
M
Progr. Divider
M 2 10
Feedback
Clock
V
CC
− 1.3 V
STATUS_VCXO
/ I_REF_CP
VCXO_IN
RESET or
HOLD
PD