ترانسفورماتور(ترانس) ترانس پالس

Product Attributes

Introduction

The ISDN S-interface module is surface mount, dual-channel, 1500Vrms. The RoHS peak reflow temperature rating is 245°C. When used with the recommended transformer and chip pairs, it conforms to the CCITT I.430 pulse waveform mask. Developed for enhanced EMC performance. Excellent longitudinal balance. Low-frequency or high-frequency choke options available. Turns ratio refers to the primary-to-secondary turns ratio, expressed as "Primary:Secondary," where "CT" denotes a center-tapped winding. Open-circuit inductance is measured at 20kHz, 100mV. Secondary leakage inductance is the inductance measured across the primary with the corresponding secondary winding short-circuited. Winding capacitance is formed by the primary and secondary conductors, measured at 100kHz, 20mV. Primary distributed capacitance refers to the distributed capacitance. DC resistance is the resistance of the winding measured under DC conditions. Maximum specified unbalanced DC current capability refers to the maximum specified unbalanced DC current capability of the device. The minimum primary inductance and maximum distributed capacitance satisfy the CCITT I.430 transmitter output and receiver input impedance requirements for TE and NT. The maximum distributed capacitance provides adequate margin for the capacitance of IC and protection diode networks, consistent with the overall maximum for the specified and permitted lengths of basic access TE lines. Materials used in the product comply with UL94-V0 flammability rating, and the product meets the requirements of IEC 695-2-2 (needle flame test). The S-interface is a standardized four-wire digital telephone access point defined by the CCITT I-series recommendations for ISDN. This "basic rate access" accommodates two 64Kbps "B-channels" for information transfer, one 16Kbps "D-channel" for signaling and control, and 48Kbps for framing and other purposes, totaling 192Kbps. The CCITT physical layer recommendation specifies transformer coupling for the user-network interface, as shown in the typical application notes.

Features

• RoHS peak reflow temperature rating: 245°C
• Compliant with CCITT I.430 pulse waveform mask when using recommended transformer and chip pairs
• Developed for enhanced EMC performance
• Excellent longitudinal balance
• Available in low-frequency or high-frequency choke options

Applications

ISDN S-interface module for the standardized four-wire digital telephone access point of Integrated Services Digital Network; typical application circuit can refer to the S-interface application circuit of Motorola MC145574.