*
P r e l i m i n a r y I n f o r m a t i o n
Integrated
Circuit
Systems, Inc.
M2004-x2
FREQUENCY TRANSLATION PLL FAMILY
GENERAL DESCRIPTION
The M2004 variants -22, -32, -42, and -52 are VCSO
(Voltage Controlled SAW Oscillator)
PIN ASSIGNMENT (9 x 9 mm SMT)
based clock generator PLLs
designed for clock frequency
translation and jitter attenuation in
a high-speed data communications
system. The clock multiplication
ratio and output divider ratio are
M1
M2
M3
M4
M5
VCC
DNC
DNC
DNC
NC
28
29
30
31
32
33
18
17
16
15
14
13
12
11
MR
nFOUT
FOUT
GND
N1
M2004-x2
pin selectable. External loop components allow the
tailoring of PLL loop response. Based on the M2004-02,
these device variants add the Hitless Switching with
Phase Build-out (HS/PBO) feature. HS/PBO ensures
that reference clock reselection does not disrupt the
output clock. In addition, a fixed Narrow Loop
Bandwidth feature (Fixed NBW) is included in the some
of the device variants.
( T o p V i e w )
34
35
36
N0
VCC
GND
10
FEATURES
Figure 1: Pin Assignment
◆ Pin-compatible with M2004-02/-12, these new product
Example Input / Output Frequency Combinations
Input (MHz) VCSO ** (MHz) Output (MHz) Application
variants offer new functions
◆ Hitless Switching with Phase Build-out to ensure
SONET/SDH MTIE and TDEV compliance during
reference clock reselection
19.44
77.76
155.52
77.76
311.04
622.08
OC-12 / 48
/192
622.08
Table 1: Example Input / Output Frequency Combinations
Device Variants and Corresponding Functions
◆ Fixed Narrow Loop Bandwidth feature available
◆ Ideal for OC-48/192 data clock
Hitless Switching /
Phase Build-out Triggered by
Phase Transient Mux Reselection
Fixed
NBW
◆ Integrated SAW (surface acoustic wave) delay line
◆ VCSO frequency from 300 to 700MHz **
Variant
M2004-02
M2004-12
M2004-22
M2004-32
M2004-42
M2004-52
no
✓ Yes
no
✓ Yes
no
no
✓ Yes
no
✓ Yes
✓ Yes
✓ Yes
no
no
✓ Yes
✓ Yes
no
◆ Low phase jitter of < 0.5ps rms, typical
(12kHz to 20MHz or 50kHz to 80MHz)
◆ Pin-selectable configuration
◆ Reference clock inputs support differential LVDS,
LVPECL, as well as single-ended LVCMOS, LVTTL
no
✓ Yes
Table 2: Device Variants and Corresponding Functions
◆ Industrial temperature available
◆ Single 3.3V power supply
* This sheet covers only parts numbered M2004-22, -32, -42, -52.
See M2004-02/-12 Product Data Sheet for M2004-02 & M2004-12.
** Specify VCSO center frequency at time of order.
◆ Small 9 x 9 mm SMT (surface mount) package
SIMPLIFIED BLOCK DIAGRAM
Loop
Filter
M2004-x2
DIF_REF
0
nDIF_REF
VCSO
REF_CLK
REF_SEL
1
M Divider
FOUT
N Divider
nFOUT
6
2
M5:0
N1:0
MR
Figure 2: Simplified Block Diagram
M2004-x2 Datasheet Rev 1.3
Revised 10Sep2003
M2004-x2 Frequency Translation PLL Family
Integrated Circuit Systems, Inc. ● Communications Modules ● www.icst.com ● tel (508) 852-5400