Micrel, Inc.
DSC2042FI1-F0014
Operational Description
The DSC2042FI1-F0014 is a dual oscillator with an
HCSL output and an LVPECL output. The device
consists of a MEMS resonator and a supporting PLL
IC. Two outputs are generated through independent
8-bit programmable dividers from the output of the
internal PLL.
When OE (pin 1) is floated or connected to VDD, the
DSC2042FI1-F0014 is in operational mode. Driving
OE to ground will tri-state both output drivers (hi-
impedance mode).
Two constraints are imposed on the output frequencies:
1) f2 = M x f1/N, where M and N are even integers
between 4 and 254, 2) 1.2GHz < N x f2 < 1.7GHz.
The actual frequencies output by DSC2042FI1-F0014
are controlled by an internal pre-programmed memory
(OTP). This memory stores all coefficients required by
the PLL for up to eight different frequency
combinations. Three control pins (FS0 - FS2) select
the output frequency combination.
Output Clock Frequencies
Frequency select bits are weakly tied high so if left unconnected the default setting will be [111] and the device will output the
associated frequency highlighted in bold.
Freq Select Bits [FS2, FS1, FS0] - Default is [111]
Freq (MHz)
000
NA
NA
001
NA
NA
010
NA
NA
011
NA
NA
100
NA
NA
101
NA
NA
110
NA
NA
111
100
100
CLK1
CLK2
Table 1. Pin-Selectable Output Frequencies
Absolute Maximum Ratings
Item
Min.
-0.3
-0.3
-
Max.
+4.0
Units
V
Condition
Supply Voltage
Input Voltage
Junction Temp
Storage Temp
Soldering Temp
VDD + 0.3
+150
V
°C
°C
°C
-55
-
+150
+260
40sec max.
ESD
HBM
MM
4000
400
-
V
CDM
1500
1000+ years of data retention on internal memory
April 07, 2016
3771
3
Revision 1.0
tcghelp@micrel.comor (408) 955-1690
MICREL [ MICREL SEMICONDUCTOR ]
