ARAF | 4P INCORPORATED CUSTOMER HOTLINE APPLICATION 114-12012 Harrisburg, Pa. 17105 1 B00 722-1111 SPECIFICATION REV | REASON ENGINEERING AELEASE DATE COAXICON* 3-7-90 MICROMINIATURE R.F. COAXIAL CONTACTS APPROVAL JESS CABARLO 1. INTRODUCTION This specification covers requirements for application of COAXICON Microminiature R.F. Coaxial Contacts. The contacts are used in a variety of connector housings, including certain housings for AMP* 750 Series and 1000 Series Box Connectors, AMP Mini-Box Connectors, and a specially designed AMP M Series connector pair. Contact designs include two printed circuit (pc) board and three crimped-tocable versions. Pin contacts fit into headers, or plug housings, and socket contacts fit receptacle housings (in M Serias housings the female housings are considered plugs; the male housings, receptacles}. The combined capabilities of the contacts and connectors allow cable-to-board, cable-to-cable, and board-to-board applications. NOTE Alt dimensions are given in inches with an applied tolerance of +.005 unless otherwise specified. Metric equivalents (millimeters) may be obtained by multiplying the dimensions and tolerances by 25.4 and rounding to the nearest hundreath, Terms used in Figura 1 to identify product features are used throughout this specification. Porthole RIGHT-ANGLE COAXIAL CABLE Contact Outer (Ref) Crimp End Insulation Jacket Braided Shield Cable Spring Male Center Stranded Center Contact Conductor Ferrule STRAIGHT Female Center SOCKET Contact (Hidden) Center Contact or [nner Wire Barrel Center Contact Crimp Area (Through Porthole) STRAIGHT PIN Dielectric Fig. 1. Product Features (cont'd next page} *Trademark of AMP Incorporated Copyright 1990 by AMP Incorporated. All International Rights Reserved. PAGE 1 OF 81114-12012 COAXICON MICROMINIATURE R.F. COAXIAL CONTACTS RIGHT-ANGLE PIN VERTICAL SOCKET Signal Post . . Ground Retention Dielectric Post Spring Signal Solder Female Center Dielectric Post Legs (2) Contact (Ref) Male Center (Hidden) Contact PC BOARD CONTACTS Fig. 1. Product Features (end) 2. REFERENCE MATERIAL 2.1. Customer Assistance A. Tooling and Application Information REF PART NO. 227602 and PRODUCT DE 3349 are representative numbers which identify the COAXICON Microminiature R.F. Coaxiai Contacts. These numbers are used by a network of AMP customer service people to access tooling and product application information. This service is provided before the purchase by your local AMP representative (Field Sales Enginser, Field Applications Engineer, etc) or, after the purchase, by calling the CUSTOMER HOTLINE number at the top of page 1. B. Product and Part Number Information Your local AMP representative should be able to answer your product questions, or will contact the appropriate information source for you. 2.2. Engineering Drawings Customer Drawings for specific products are available from the responsibie AMP Engineering department via the appropriate service network source (See paragraph 2.1). The information contained in Customer Drawings takes priority if there is a conflict with this document or with any other technical documentation supplied by AMP Incorpcerated. 2.3. Bulletins AMP Corporate Bulletin No. 52 outlines recommended soldering techniques, and contains problem-solving information to aid soldering technicians. 2.4. Specifications AMP Product Specification 108-12049 covers the performance, tests, and quality requirements for multiple COAXICON Microminiature R.F. Coaxial Contacts for use in special cavities of po board connectors and panel- mounted connectors. PAGE 2 OF &COAXICON MICROMINIATURE R.F. COAXIAL CONTACTS 114-12012 2.5. Technical Publications A. AMP Instruction Sheet IS 6748 provides information on the use and maintenance of hand-held crimp tooling. (See Section 4, TOOLING TYPES, for more information.) B. AMP instruction Sheet IS 2923 covers contact extraction tooling and procedures for using the tool in repair of connectors or replacement of damaged contacts. REQUIREMENTS 3.1. PC Board Requirements A. Board thickness may be no less than .062 and no more than .125. B. Board layout shall be as shown in Figure 2. .200 Min Between Centers A of Any Two Contacts + a .100 .025 Min Dia .100 4 } | .200 .046 Min Dia LAYOUT FOR (2 Places) .046 Min Dia RIGHT-ANGLE PIN (2 Places) LAYOUT FOR VERTICAL SOCKET CABLE CLEARANCE HOLE FOR SOCKETS PASSING THROUGH PC BOARD .180 Min Dia A When contacts are used in boardmounted connectors, refer to the AMP Customer Drawing for the specific connector used, to obtain measurements between contacts. Fig. 2. PC Board Layout PAGE 3 OF 8114-12012 COAXICON MICROMINIATURE R.F. COAXIAL CONTACTS 3.2. PC Board Contact Seating Seated pc board contacts shall meet the requirements of Figure 3. RIGHT-ANGLE PIN VERTICAL SOCKET PC Board Typical Solder. Fillets (Ref) Fig. 3. Seated Contact Requirements 3.3. Cleaning, Drying, and Soldering A. Solder legs shall be fluxed before soldering using an activated rosin base flux. Proper flux selection depends on the type of printed circuit board and any components already mounted. Flux must also be compatible with the flow solder tine and with manufacturing and safety requirements. B. Removal of fluxes, residues, and activators is mandatory. Cleaning procedures are chosen by the customer and depend on the type of flux used on the solder line. | DANGER | AVOID PERSONAL INJURY! Always pay strict attention to recommendations of the soivant manufacturer regarding toxicity and other safety requirements. C. When drying cleaned assemblies and pc boards, make certain that recommended temperature limits are not exceeded. CAUTION Excessive fernperatures may cause damage to the cannector housings. D. When contacts are used with housings in board-to-board applications, it is important to maintain proper mating alignment. This can best be accomplished by one of two recommended methods: 1. NOT FOR USE WITH VAPOR-PHASE SOLDERING Create a dummy pe board by inserting Vertical Socket contacts into a receptacle housing like those to be used in production. Insert AMP Alignment Ring 222000-1 (IS 9344) into each contact cavity to align sockets. Solder sockets to board. This receptacle connecter now can be used as an alignment fixture for soldering mating pin headers. 2. VAPOR-PHASE SOLDERING Since the alignment rings used in method 1 are nylon which will not withstand vapor-phase soldering, special fixtures should be manufactured to align pin and socket contacts. Dimensioning will depend on the specific housings used, and should be designed in coordination with the AMP Engineering department responsible for the housings. PAGE 4 OF 8COAXICON MICROMINIATURE R.F. COAXIAL CONTACTS 114-12012 3.4, Center Conductor (Twist Strands Tightly Together} E. AMP Corporate Bulletin No. 52 is available upon request and can be used as a guide in saldering. This bulletin gives various flux types and characteristics along with commercial designation and flux removal procedures. A checklist is attached to the bulletin to aid in obtaining information pertaining to soldering problems. Cable Selection and Preparation A, Select cable according to Military Specification MIL-C-17. A partial listing of acceptable equivalents follows: Belden 9221 @ RG-178/U (Double Braid) RG-196/U Gore CXN-1644 t+ RG-179/U RG-316/U Malco 250-3908-0000 uw RG-187/U RG-318/U (Double Braid) RG-174/U RG-188/U Tensolite 30850/81T-1 + B. Figure 4 shows cable stripping dimensions. NOTE DO NOT aick or cut the center conductor or braid when stripping the cable. After cable is Stripped, center conductor strands should be twisted tightly together to eliminate loose wire Sfrands. Ferrule (Placed on Cable, Large End Facing Cable End to be Stripped, Before Stripping) .188 Strip Length (Before Flaring) from Edge of Outer Insulation Jacket to End of Braid Outer insulation Jacket Dielectric .406 Initial Strip Length to Cable Outer Insulation Jacket .188 Strip Length to Dielectric Fig. 4. Cable Stripping Dimensions @ Product of Belden Corporation @ Standard military designation + Product of W.L. Gore & Associates, Inc. + Product of Tensolite Co., a division of Carlisle Corp. = Product of Malco, a division of Microdot Inc. PAGE 5 OF 8114-12012 COAXICON MICROMINIATURE R.F. COAXIAL CONTACTS 3.5. Contact Crimp Requirements A. Cable dielectric and center conductor must be fully inserted with the dielectric bottomed in the inner wire barrel before crimping the inner wire barrel. B. Braid should be over and evenly distributed around crimp end of contact body. Ferrule must be fully seated over braid and positioned flush against the contact shouider. Crimp according to the instructional material packaged with the hand tool. C. Figure 5 shows properly crimped inner wire barrel (center contact) and ferrule (cable braid and contact body). Braid Folded Forward Evenly Around Contact Crimp End Center Conductor and Dielectric In Inner Wire Barrel (Center INNER WIRE Conductor Visible Through BARREL CRIMP Portholes) (Applies to All Cable Contacts) Center Contact Crimp Height (See Crimp Height Table) Dimension AFrom Back of Crimp at Braid Ferrule to Front of Contact (See Crimp (See Assembly Length Table} Height Table) Dimension AFrom Back of . Ferrule to Top of Contact Ferrule Against (See Assembly Length Table} Contact Shoulder Crimp at Contact Body (See Crimp Height Table} Crimp at Contact Ferrule Against Body (See Crimp Contact Shoulder Height Table) RIGHT-ANGLE SOCKET Crimp at Braid STRAIGHT CONTACT (See Crimp Height Table} (Applies to Pin or to Socket) FERRULE CRIMP CRIMP HEIGHT TABLE ASSEMBLY LENGTH TABLE CENTER- FERRULE CRIMP DIMENSION A TOOL NO. a] CONTACT LARGE END SMALL END CONTACT TYPE (MAX) CRIMP | (AT CONTACT BODY)| (AT BRAID) Straight Pin 921 220215-1 091 - .098 Straight Socket 916 220215-2 _|.112 -.119 -0230 - .0275 7199 147 Right~Angle Socket 700 & Tool number is determined by tha cable you use (See the table in paragraph 4.2, page 7). Fig. 5. Crimped Contact Requirements PAGE 6 OF 8COAXICON MICROMINIATURE R.F. COAXIAL CONTACTS 114-12012 3.6. Wire Bend Allowance lt is important not to restrict contacts in any way that may adversely affect the wire dress of the cable. AMP Engineering recommends that individual cables should be dressed to a bend radius of at least ten times the cabie outside diameter. Likewise, cable bundles should be drassed to a bend radius of at least tan times the diameter of the bundle. 3.7. Repairability Contacts can be easily removed from snap-in type housings using AMP Extraction Tool No. 220216-1 (See IS 2923). 4. TOOLING TYPES 4.1. Solder Contact Tooling Contacts generally are placed by hand for soldering applications. However, when used in connectors for boardto board applications, a fixture may be needed to ensure proper alignment. Recommended fixturing methods are discussed in paragraph 3.3.D, page 4 of this document. 4.2. Crimp Contact Tooling Crimp-type contacts are applied to coaxial cabla using AMP Hand Crimping Tools with base part no. 220215 (IS 6748). The following table lists particular cables along with the dash no. of the hand tool used to apply them. CABLE TYPE HAND TOOL NUMBER RG-178/U (Double Braid) RG-196/U Malco 250-3908-C0000 Tensolite 30850/81T-1 2202 15-1 Belden 9221 Gore CXN-1644 RG-174/U RAG-179/U 220215-2 RG-187/U AG-188/U RG-316/U RG-316/U (Double Braid) PAGE 7 OF 8114-12012 COAXICON MICROMINIATURE R.F. COAXIAL CONTACTS 5. VISUAL AID Figure 6 is to be used by production personnel to ensure a properly applied product. Applications which are NOT visually correct should be inspected using the information in the main body of this specification and in the instructional material shipped with tha product or tooling. CENTER CONTACT CRIMP MUST BRAID FOLDED FORWARD TYPICAL CONTACT AFTER HOLD CABLE CENTER CONDUCTOR EVENLY AROUND CONTACT INNER WIRE BARREL FIRMLY IN PLACE CRIMP END (CENTER CONTACT) IS CRIMPED ee | j FERRULE ON CABLE, LARGE END FACING CABLE STRIP END (PLACED ON CABLE FERRULE MUST BE AGAINST BEFORE STRIPPING OPERATION) CONTACT SHOULDER | TYPICAL CONTACT AFTER a, FERRULE IS CRIMPED CRIMP MUST FIRMLY HOLD FERRULE IN PLACE ON CONTACT AND CABLE ALIGNMENT OF ALL PINS AND SOCKETS MUST BE MAINTAINED BEFORE, DURING, AND AFTER SOLDERING PC BOARD CONTACTS SOLDERED IN POSITION AT RIGHT ANGLE TO THE BOARD PC BOARD UNDAMAGED TYPICAL PC BOARD CONNECTOR AND CONTACT ARRANGEMENT FIG. 6. VISUAL AID PAGE B OF 8B