sy89429a Micrel Semiconductor, sy89429a Datasheet - Page 2

• Manufacturer Part Number: sy89429a
• Description: Sy89429a Programmable Frequency Synthesizer 25mhz To 400mhz
• Manufacturer: Micrel Semiconductor

Micrel, Inc.
NOTE:
Pin numbers reference PLCC pinout.
BLOCK DIAGRAM
DETAILED BLOCK DIAGRAM
F undamental
10–25MHz
S ource
C rystal
P EC L
or
S _
S _
S _
P _
INTERFACE
C LOCK
LOAD
Fundamental
DAT A
LOAD
10-25MHz
3 WIRE
Crystal
Source
PECL
or
27
26
28
4
5
7
XTAL1
XTAL2
÷ 8
OSC
OSC
÷ 8
F RE F
LOOP _FILT ER
FREF
SERIAL
L = LAT CH
H = T rans parent
2
9-B IT S R
P HASE DET EC TOR
8 -> 16
CONFIG. INFO
C OUNT ER
9-B IT ÷ M
PARALLEL
PHASE DETECTOR
LAT CH
0
LOOP _RE F
M[8:0]
1
÷ M
9
3
+5.0V
2
INTERFACE
1
400 – 800
LOGIC
V CO
MHz
V CO
0
PLL
400-800
2-B IT S R
MHz
T 110
V
17,18
C C_QUIE T
+5.0V
(2,4,8,16)
0
LAT CH
÷ N
N[1:0]
1
÷ N
1
2
19,22
3-B IT S R
PECL
LAT CH
+5.0V
V
C C1
S _
V
C C_OUT
C LOCK
6, 21
F OUT ÷ 4 —
F OUT —
F RE F —
HIG H —
LOW —
÷ M —
÷ M —
FOUT
TEST
7
6
5
4
3
2
1
0
Precision Edge
25
24
23
20
SY89429A
+5.0V
F OUT
F OUT
T ES T
®