ISDN S-INTERFACE MODULES
Surface Mount, Dual, 1500 Vrms
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.
LLSec: 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).
Definition of Terms
IC Manufacturer IC Part Number Pulse Part Number
AMD AM79C 30A/32A T5034/T5038
Lucent (AT&T) T7234/T7254/T7250/T7256/T7259 T5037/T5039
T7903 T5034/T5038
Mietec MTC-2072 T5034/T5038
Mitel MT8930/8931 T5034/T5038
Motorola MC145574 T5037/T5039
National TP3420/3421 T5034/T5038
SGS Thomson ST5420/5421 T5034/T5038
Siemens PEB2080/2081/2084/2085/2086 T5034/T5038
PSB 2186
Yamaha YM7405B T5034/T5038
Module Selection Guide
12220 WORLD TRADE DRIVE, SAN DIEGO, CALIFORNIA 92128 • TEL 619-674-8100 • FAX 619-674-8262 • http://www.pulseeng.com
T635.A (2/98)