We are pleased to introduce you to our 32.768kHz crystal unit for F1xx, F2xx,
F4xx,and F5xx:
Crystal Recommendations for Texas Instruments "MSP430 series family”.
For product information of "MSP430 series",
please see Texas Instruments' web site.
Please note: to design oscillation circuit for MSP430 series, you need to confirm the electronic
characteristics as follows:
Oscillation allowance and Negative resistance (-R):
Drive Level:
Load Capacitance:
Load capacitance affects frequency stability, oscillation allowance, negative resistance, and start-up time of oscillation.
In addition the load capacitance is determinative factor of crystal unit's load capacitance (CL value) directly.
Please refer to our web site:
http://www.epsontoyocom.co.jp/english/C_support/precautions/precautions_2.html
Support information > Precautions in
Designing oscillation circuits > 3. Load capacitance
* frequency stability: frequency deviation out of circuit conditions.
|
When Customer selects crystal unit, ｌoad capacitance (CL value) is
an
important factor of the selection.
For instance, crystal with small CL(7.0 pF) makes larger oscillation allowance,
smaller current
consumption and worse frequency stability, like below table.
Oppositely, crystal with large CL(12.5 pF) makes smaller oscillation allowance, larger
current
consumption and better frequency stability.
Please select it in consideration of these characteristics.
| Product |
Size [mm] |
Applications |
Images
|
| C-002RX |
6.0×2φ |
Electronic, Gas, Water meter, clock |
 |
|
MC-306 |
8×3.8×2.5t |
Electronic, Gas, Water meter, Flow meter, Intelligent sensor, Measurement equipment, Blood pressure meter, Blood-sugar monitor, Security systems |
 |
|
MC-146
|
7×1.5×1.4t
|
DSC, Consumer equipment, Radio equipment, Blood pressure meter, Blood-sugar monitor, Security systems |
 |
FC-135
FC-13F |
3.2×1.5×0.8t
3.2×1.5×0.55t |
PMP, DSC, Portable equipment |
 |
|
FC-12M |
2.0×1.2×0.6t |
Portable equipment |
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MSP430 F2001 crystal oscillator setting and equivalent crystal CL values
Please refer
TI WEB site for other products
|
XCAPx value (integrated
effective load.) |
Crystal unit
equivalent CL values |
Epson Toyocom
32.768 kHz Crystal
Product Code |
CL
(pF) |
MC-306 |
MC-146 |
FC-135 |
C-002RX |
XCAPx=0
(1pF Typ.) |
External capacitors are required |
|
Customer can select crystal products
with external capacitor combination. |
|
XCAPx=1 (5.5pF typ) |
9 pF |
9 |
Q13MC30610002 |
Q13MC1460004 |
Q13FC13500003 |
--- |
|
XCAPx=2 (8.5pF typ) |
12.5 pF |
12.5 |
Q13MC30610003 |
Q13MC1460002 |
Q13FC13500004 |
Q11C02RX10022 |
XCAPx=3
default
(11pF typ) |
--- |
|
--- |
--- |
--- |
--- |
* Product Code: encoded numbers of crystal specifications
Recommended
Crystal CL values and MSP430 F2001 XCAPx setting
| No. |
Crystal CL Value |
XCAP value
(integrated effective load typ.) |
Advantage |
Drawback |
| 1 |
12.5 pF |
XCAPx=2
(8.5pF) |
High frequency stability |
Higher
current consumption,
slower oscillation startup. |
| 2 |
9pF |
XCAPx=1 (5.5pF) |
Low current consumption |
Lower stability due to load capacitance variation of
external components and the layout. |
For customer required to follow XOSC8
Guidance, crystal products with high ESR are available.
 Texas Instruments
Application Report XOSC8 Guidance
|
Notes: |
Above recommendations are based on actual evaluation
results and intended to support users in picking the right components.
As the actual board layout and choice of external components influences
the best suitable crystal load capacitance,
Epson Toyocom does not assume any responsibility and grant
warranty for above recommendations.
Users design must be verified and decided by own and individual
evaluation.
Please refer to Texas Instruments MSP430 manual for setting XCAPx and
other parameters. |
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MSP430 FG47x crystal oscillator setting and equivalent crystal CL values
Please refer
TI WEB site for other products
|
XCAPx value (integrated
effective load.) |
Crystal unit
equivalent CL values |
Epson Toyocom
32.768 kHz Crystal
Product Code |
CL
(pF) |
MC-306 |
MC-146 |
FC-135 |
C-002RX |
XCAPx=0
(1pF Typ.) |
External capacitors are required |
|
Customer can select crystal products
with external capacitor combination. |
XCAPx=1
(5.5pF typ) |
9 pF |
9 |
Q13MC30610002 |
Q13MC1460004 |
Q13FC13500003 |
--- |
XCAPx=2
(8.5pF typ) |
12.5 pF |
12.5 |
Q13MC30610003 |
Q13MC1460002 |
Q13FC13500004 |
Q11C02RX10022 |
XCAPx=3
default
(11pF typ) |
--- |
|
--- |
--- |
--- |
--- |
* Product Code: encoded numbers of crystal specifications
Choosing a
suitable XCAPx setting of MSP430 FG47x
| No. |
Crystal CL Value |
XCAP value
(integrated effective load typ.) |
Advantage |
Drawback |
| 1 |
12.5 pF |
XCAPx=2
(8.5pF) |
High frequency stability |
Higher
current consumption,
slower oscillation startup. |
| 2 |
9pF |
XCAPx=1 (5.5pF) |
Low current consumption |
Lower stability due to load capacitance variation of
external components and the layout. |
For customer required to follow XOSC8
Guidance, crystal products with high ESR are available.
Texas Instruments
Application Report XOSC8 Guidance
|
Notes: |
Above recommendations are based on actual evaluation
results and intended to support users in picking the right components.
As the actual board layout and choice of external components influences
the best suitable crystal load capacitance,
Epson Toyocom does not assume any responsibility and grant
warranty for above recommendations.
Users design must be verified and decided by own and individual
evaluation.
Please refer to Texas Instruments MSP430 manual for setting XCAPx and
other parameters. |
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MSP430 F5438A crystal oscillator setting and equivalent crystal CL values
Please refer
TI WEB site for other products
|
XCAPx value (integrated effective load.) |
Crystal unit
equivalent CL values |
Epson Toyocom
32.768 kHz Crystal
Product Code |
CL
(pF) |
MC-306 |
MC-146 |
FC-135 |
C-002RX |
XCAPx=0
(2pF Typ.) |
External capacitors are required |
--- |
Customer can select crystal products
with external capacitor combination. |
|
XCAPx=1
(5.5pF typ) |
7 pF |
7 |
Q13MC30610004 |
Q13MC14610001 |
Q13FC13500002 |
--- |
XCAPx=2
(8.5pF typ) |
12.5 pF |
12.5 |
Q13MC30610003 |
Q13MC14610002 |
Q13FC13500004 |
Q11C02RX10022 |
XCAPx=3
default
(12pF typ) |
--- |
|
--- |
--- |
--- |
--- |
* Product Code: encoded numbers of crystal specifications
Choosing a suitable XCAPx
setting of MSP430 F5438A
| No. |
Crystal CL Value |
XCAP value
(integrated effective load typ.) |
Advantage |
Drawback |
| 1 |
12.5 pF |
XCAPx=2
(8.5pF) |
High frequency stability |
Higher
current consumption,
slower oscillation startup. |
| 2 |
7 pF |
XCAPx=1 (5.5pF) |
Low current consumption |
Lower stability due to load capacitance variation of
external components and the layout. |
|
Remarks: |
By tuning MSP430F5xx XT1DRIVE, oscillation allowance and
current consumption will be controlled. |
|
Notes: |
Above recommendations are based on actual evaluation
results and intended to support users in picking the right components.
As the actual board layout and choice of external components influences
the best suitable crystal load capacitance,
Epson Toyocom does not assume any responsibility and grant
warranty for above recommendations.
Users design must be verified and decided by own and individual
evaluation.
Please refer to Texas Instruments MSP430 manual for setting XCAPx and
other parameters. |
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Recommendable XTAL
for F1xx
* Product Code: encoded numbers of crystal specifications
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Customer can select Epson Toyocom
32.768 kHz Crystal
Products from table below. |
| |
|
| XTAL |
FC-135 |
| CL(pF) |
Product Code |
| 7 |
Q13FC13500002 |
| 9 |
Q13FC13500003 |
| 12.5 |
Q13FC13500004 |
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* Product Code: encoded numbers of crystal
specifications
* Please contact Epson Toyocom, when customer needs, other size products. |
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Texas Instruments
Application Report XOSC8 Guidance |
