www.murata-ps.com
78250 Series
MAX250/MAX251 Compatible Converter Transformers
FEATURES RoHS compliant Maxim MAX250/MAX251 compatible Isolation to 4kVrms Industry-standard pinout Surface mount option UL 94 V-0 package materials Low profile Toroidal construction Fully encapsulated Industrial temperature range
DESCRIPTION
The 78250 series of converter transformers are specifically designed for use with Maxim chipsets to provide isolated RS232 interfaces. Carefully controlled tu.
Converter Transformers
www.murata-ps.com
78250 Series
MAX250/MAX251 Compatible Converter Transformers
FEATURES RoHS compliant Maxim MAX250/MAX251 compatible Isolation to 4kVrms Industry-standard pinout Surface mount option UL 94 V-0 package materials Low profile Toroidal construction Fully encapsulated Industrial temperature range
DESCRIPTION
The 78250 series of converter transformers are specifically designed for use with Maxim chipsets to provide isolated RS232 interfaces. Carefully controlled turns ratios ensure consistent performance whilst a toroidal construction minimises EMI.
Surface-mount parts
The surface-mount (M suffix) products are not recommended for new designs. For existing designs, however, Murata Power Solutions will continue to manufacture and fully support these parts. For recommended alternatives please refer to the 78250J Series datasheet.
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For full details go to www.murata-ps.com/rohs
CHARACTERISTICS 78250C/78250MC
Parameter
Conditions
Primary Inductance, LP Leakage Inductance, L
L
Interwinding Capacitance, C WW
Primary D.C. Resistance, R DC
Volt-time Product, Et
10kHz, 100mV 100kHz, 100mV 100kHz, 100mV <0.1VDC Pins1/2 or 2/3
Min.
Typ.
Max.
Units
1.0
2.0
2.5
mH
2.0
3.0
μH
69
90
pF
1.0
2.0
Ω
50
Vμs
CHARACTERISTICS 78250VC/78250MVC
Parameter
Conditions
Primary Inductance, L P
Leakage Inductance, L L
Interwinding Capacitance, C WW
Primary D.C. Resistance, R DC
Volt-time Product, Et
10kHz, 100mV 100kHz, 100mV 100kHz, 100mV <0.1VDC P.