Rev 1.1, August 7, 2008 Page 10 of 12
SL38000
PCin(pF) =PCout(pF)= [(CL(pF) – Cp(pF)/2)] x 2
Where CL is crystal load capacitor as given by the crystal datasheet and Cp(pF) is the compensation factor for the
total parasitic capacitance at XIN or XOUT pin including PCB related parasitic capacitance.
As an example; if a crystal with CL=18pF is used and Cp=4pF, by using the above formula, PCin=PCout=[(18-(4/2)] x
2 = 32pF. Programming PCin and PCout to 32pF assures that this crystal sees an equivalent load of 18pF and no
other external crystal load capacitor is needed. Deviating from the crystal load specification could cause an increase
in frequency accuracy in ppm. Refer to the Table 5 for the recommended crystal specifications.
Recommended External Crystal Specifications (XO Version)
Parameter
Description
Min
Typ
Max
Unit
Comments
FNOM
Nominal Crystal
Frequency Range
8
-
48
MHz
Fundamental Mode AT Cut
CL
Nominal Crystal Load
6
12
18
pF
Load for +/-0 ppm Fo resonance
value
R1,1
Equivalent Series
Resistance
20
40
100
Ohm
F-Range: 8.0 to 12.999 MHz
R1,2
Equivalent Series
Resistance
12.5
25
60
Ohm
F-Range: 13.0 to 19.999 MHz
R1,3
Equivalent Series
Resistance
10 20 50 Ohm F-Range: 20.0 to 48.000 MHz
DL1,1
Crystal Drive Level
-
-
200
µW
F-Range: 8.0 to 19.999 MHz
DL1,2
Crystal Drive Level
-
-
150
µW
F-Range: 20.0 to 48.000 MHz
Co1
Shunt Capacitance
-
4
5.4
pF
SMD Xtals
Co2
Shunt Capacitance
-
5
7.2
pF
Through Hole (Leaded) Xtals
Table 3. Recommended Crystal Specifications
Rev 1.1, August 7, 2008 Page 11 of 12
SL38000
Package Outline and Package Dimensions
28-Pin TSSOP Package
Thermal Characteristics
Parameter Symbol Condition Min Typ Max Unit
Thermal Resistance
Junction to Ambient
θ
JA Still air - TBD - °C/W
θ JA 1m/s air flow - TBD - °C/W
θ JA 3m/s air flow - TBD - °C/W
Thermal Resistance
Junction to Case
θ
JC Independent of air flow - TBD - °C/W
Rev 1.1, August 7, 2008 Page 12 of 12
SL38000
Ordering Information
[1]
Ordering Number
[2]
Marking Shipping Package Package Temperature
SL38000ZC-XXX
SL38000ZC-XXX
Tube
28-pin TSSOP
0 to 70°C
SL38000ZC-XXXT
SL38000ZC-XXX
Tape and Reel
28-pin TSSOP
0 to 70°C
SL38000ZI-XXX
SL380004ZI-XXX
Tube
28-pin TSSOP
-40 to 85°C
SL38000ZI-XXXT
SL38000ZI-XXX
Tape and Reel
28-pin TSSOP
-40 to 85°C
Notes:
1. All SLI products are RoHS compliant.
2. “XXX” is “Dash” number and will be assigned by SLI for final programmed samples and production
units based on customer programming requirements.
The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without
notice. Silicon Laboratories assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences
resulting from the use of information included herein. Additionally, Silicon Laboratories assumes no responsibility for the functioning
of undescribed features or parameters. Silicon Laboratories reserves the right to make changes without further notice. Silicon
Laboratories makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor
does Silicon Laboratories assume any liability arising out of the application or use of any product or circuit, and specifically disclaims
any and all liability, including without limitation consequential or incidental damages. Silicon Laboratories products are not designed,
intended, or authorized for use in applications intended to support or sustain life, or for any other application in which the failure of
the Silicon Laboratories product could create a situation where personal injury or death may occur. Should Buyer purchase or use
Silicon Laboratories products for any such unintended or unauthorized application, Buyer shall indemnify and hold Silicon
Laboratories harmless against all claims and damages.

SL38000ZCT

Mfr. #:
Manufacturer:
Silicon Labs
Description:
Clock Generators & Support Products 1to 200MHz, 4PLL, 9 outputs CG/SSCG, 3.3 to 2.5V
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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