Table of Contents
Advertisement
Quick Links
1
Features
RF Transformer "Stabilized Matching Device" is RF impedance matching components.
You can adjust impedance matching easily between antenna and feeding point, when you use RF
Transformer.
RF Transformer has very few frequency characteristics. So it's extremely useful for RF impedance
matching.
Small size : 2.0 x 1.25 x 0.6 mm
2
Part Number Configuration
SMST 21
①
②
① Product ID (SMST = Antenna Matching device)
② Dimension Code
③ Control Code
④ Serial Number
※RoHS Compliant
Halogen free
T/R only.
RF Transformer (Stabilized Matching Device)
3
NMHB – 003
③
④
(Unit : mm)
Code
Dimension
21
2.0 x 1.25
SMST21NMHB series
1
July.2014
Advertisement
Table of Contents
Summary of Contents for Murata SMST21NMHB Series
- Page 1 RF Transformer (Stabilized Matching Device) SMST21NMHB series Features RF Transformer “Stabilized Matching Device“ is RF impedance matching components. You can adjust impedance matching easily between antenna and feeding point, when you use RF Transformer. RF Transformer has very few frequency characteristics. So it’s extremely useful for RF impedance ...
-
Page 2: Pin Configuration
RF Transformer (Stabilized Matching Device) SMST21NMHB series Construction Dimensions Dimensions Unit：mm Mark Size Mark Size 2.00 +/- 0.15 0.95 +/- 0.10 1.25 +/- 0.15 0.35 +/- 0.10 0.60 +/- 0.10 0.30 +/- 0.10 0.35 +/- 0.10 0.15 +/- 0.10 0.40 +/- 0.10 Pin Configuration Pin No. -
Page 3: Circuit Diagram
RF Transformer (Stabilized Matching Device) SMST21NMHB series Circuit Diagram SMST21NMHB-*** Radiator RF-IC Characteristics Absolute maximum ratings Rating Symbol Value Unit Operating Temperature -40 to +85 Storage Temperature -40 to +85 Input power Electrical Characteristics (T=25 Low Band (892MHz) High Band (1940MHz) -
Page 4: Typical Characteristics
RF Transformer (Stabilized Matching Device) SMST21NMHB series Typical Characteristics [SMST21NMHB-001] Smith chart Equivalent circuit [Low Band] freq= 892.0MHz freq= 1.940GHz S ﴾ 2 , 2 ﴿ = 0 . 7 3 0 / 1 5 3 . 2 8 3 S ﴾... - Page 5 RF Transformer (Stabilized Matching Device) SMST21NMHB series [SMST21NMHB-003] Smith chart Equivalent circuit [Low Band] [High Band] [SMST21NMBH-004] Smith chart Equivalent circuit [Low Band] freq= 892.0MHz freq= 1.940GHz S ﴾ 2 , 2 ﴿ = 0 . 6 3 9 / 1 4 5 . 1 6 8 S ﴾...
-
Page 6: Reliability Test
RF Transformer (Stabilized Matching Device) SMST21NMHB series Reliability Test 【Mechanical Test】 Items Specifications Test Methods Appearance Vibration No severe damages Solder specimens on the testing jig (glass Resistance fluorine boards) shown in appended Fig.1 by a Electrical Satisfy specifications listed in Pb free solder. - Page 7 RF Transformer (Stabilized Matching Device) SMST21NMHB series 【Environmental Test】 Items Specifications Test Methods High Temp. Appearance No severe damages Temperature : 85+2/-0 °C Exposure Period : 1000+48/-0 h Electrical Satisfy specifications listed in Room Condition : 2 ~ 24 h...
- Page 8 RF Transformer (Stabilized Matching Device) SMST21NMHB series Tape and Reel Packing 1) Dimensions of Tape (Plastic tape) (Unit: mm) Feeding direction 2) Dimensions of Reel (Unit: mm) 2±0.5 Φ60 Φ180 9.0＋1.0 φ13±0.2 －0 13.0±1.0 July.2014...
- Page 9 RF Transformer (Stabilized Matching Device) SMST21NMHB series 3) Taping Diagrams [1] Feeding hole: As specified in (1) [2] Hole for chip: As specified in (1) [3] Cover tape: 0.05mm in thickness [4] Base tape: As specified in (1) Feeding hole...
- Page 10 RF Transformer (Stabilized Matching Device) SMST21NMHB series 4) Leader and Tail tape Tail tape Components No components (No components) Leader tape (Cover tape alone) Over100mm Over160m Over400mm Feeding direction 5) The tape for chips are wound clockwise, the feeding holes to the right side as the tape is pulled toward the user.
- Page 11 IN and OUT terminals. Please refer to the specifications for the standard land dimensions. The recommended land pattern and dimensions is as Murata's standard. The characteristics of products may vary depending on the pattern drawing method, grounding method, land dimensions, land forming method of the NC terminals and the PCB material and thickness.
-
Page 12: Soldering Conditions
100 °C. Soldering must be carried out by the above mentioned conditions to prevent products from damage. Contact Murata before use if concerning other soldering conditions. Use rosin type flux or weakly active flux with a chlorine content of 0.2 wt % or less 6. -
Page 13: Operational Environment Conditions
- Water splashing place. - Humid place where water condenses. - Freezing place. If there are possibilities for products to be used under the preceding clause, consult with Murata before actual use. 8. Limitation of Applications: The product is designed and manufactured for consumer application only and is not available for any application listed below which requires especially high reliability for the prevention of such defect as may directly cause damage to the third party's life, body or property. - Page 14 RF Transformer (Stabilized Matching Device) SMST21NMHB series Note: Please make sure that your product has been evaluated and confirmed against your specifications when our product is mounted to your product. All the items and parameters in this product specification have been prescribed on the premise that our product is used for the purpose, under the condition and in the environment agreed upon between you and us.
Need help?
Do you have a question about the SMST21NMHB Series and is the answer not in the manual?
Questions and answers