IEC 62148-8-2003 pdf – Fibre optic active components and devices – Package and interface standards – Part 8: SFF LC 20-pin transceivers.
1 Scope This part of IEC 62148 covers the physical interface specifications for the SFF LC 20-pin fibre optic transceiver module family. The intent of this standard is to adequately specify the physical requirements of an optical transceiver that will enable mechanical interchangeability of transceivers complying with this specification both at the printed-circuit wiring board and for any panel-mounting requirement. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 61754-20: Fibre optic connector interfaces – Part 20: Type LC connector family IEC 62148-1: Fibre optic active components and devices – Package and interface standards – Part 1: General and guidance 3 Definition and abbreviation For the purpose of this International Standard, the following abbreviation and definition apply. 3.1 Definition 3.1.1 small form factor optical transceiver a compact optical digital signal transceiver whose package has the same cross sectional outline as the receptacle of RJ-45 electrical connector 3.2 Abbreviation SFF: small form factor 4 Classification The transceiver described in this document is classified as type 1 according to IEC 62148-1.
5 Specification of optical connector interface This standard applies to the LC optical connector interface. Detailed dimensions of the optical receptacle are provided in Clause 7. Assignment of the optical transmit and receive ports is aligned to the electrical pins. One half of the module is the ‘transmit’ side and the other is the ‘receive’ side. Assignments are shown in Figure 1. 6 Electrical interface 6.1 General The electrical interface in this standard defines only the basic functionality of each pin. 6.2 Numbering of electrical terminals Pin numbering assignments are shown in Figure 1 (viewed from the top of the module with pins underneath).