ISDN S-INTERFACE MODULES
Surface Mount, Dual, 1500 Vrms
Definition of Terms
Ratio: This is the turns ratio, expressed as “Primary:Secondary”. The term “CT” designates a center-tapped
winding.
OCL: Open Circuit Inductance, measured 20 kHz, 100 mV.
L L Sec: Leakage Inductance measured across the primary with the respective secondary winding short-circuited.
CW/W: Winding capacitance, formed by the primary and secondary wire. These wires form the “Plates” of this
capacitor. Measured at 100 kHz, 20 mV.
CD Pri: This is the distributed capacitance.
DCR: This is the resistance of the windings when measured in DC conditions.
IDC: The maximum specified unbalanced DC current capability of the device.
The minimum primary inductance and the maximum distributed capacitance satisfy the transmitter output and
receiver input impedance requirements of CCITT I.430 for both TE and NT.
The maximum distributed capacitance allows sufficient margin for the capacitance of the IC and a protection
diode network. It is consistent with the overall maximum value specified and permitted length of the basic
access TE cord.
Flammability – Materials used in the products are recognized UL94-VO. Products meet the requirements of
IEC 695-2-2 (needle flame test).
www.pulseeng.com 2 T635.D (10/10)
Module Selection Guide
IC Manufacturer IC Part Number Pulse Part Number
PEB2080/ 2081/ 2084/2085/2086
Siemens PSB 2186 T5049NL
PSB 21381/ 21382/ 21383/ 21384
USA 858 674 8100
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Germany 49 7032 7806 0
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Singapore 65 6287 8998
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Shanghai 86 21 62787060
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China 86 755 33966678
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Taiwan 886 3 4356768