// // file: qfn_24_pin_27sq_geom.txt // // date: 21-Apr-2012 Original version of 32 pin part // // 16-Dec-2015 Moved to 48 pins for Hub Module // // 22-Jul-2016 Clean up and finish this geometry. I'm moving // QFN- geometry to my "modern" setup using through // hole pins for thermal vias and Breakout metal on // top and bottom for the Exposed Pad SMD Pad. // // 13-Sep-2016 Move the backside metal for the center thermal/gnd // pad from Breakout_2 to Sheet_Dielectric_1. // Handling of the backside metal is described in // the Hub trace routing details file. // // 10-Dec-2016 To the Pin/Pad Stack for the Center Thermal Pad Via // geometry add a 0.28 mm diameter flash on PREPREG_5 // to indicate the location of a Via that needs to be // Plugged from the Top. This works because in the Hub // design the QFN-48 package is only instanced on the // top side of the card. // // 29-Nov-2022 This geometry will now be used for the Burr-Brown // TLV320ADC6140 audio ADC that will be used to process // the hydrophone signals on the Disco-Kraken board. // This package looks like a standard QFN-24 // with a 2.70 mm square Exposed Pad. I think that // TI calls this package PWQFN-N24. // The name of this geometry is qfn_24_27sq. // The names of its 3 Pin/Pad Stacks will now also // include the 27sq extension to keep them separate // from the Stacks used with other qfn geometries. // // // Now used for the BB TLV320ADC6140 Audio ADC // // // There are various names for this package but I like // QFN Quad Flatpack No_leads. The QFN name seems to // be becoming the most common. // // // This geometry mostly comes from the TI TLV320ADC6140 data sheet // // Basic Design: // // The SMD Package is between 3.85 mm and 4.15 mm on a side square. // // Pin Pitch is 0.50 mm // Pin Length is between 0.30 mm and 0.50 mm and they come // out flush with the edge of the package // // Pad lands are 0.28 mm x 0.85 mm // // External edges of Pad Lands are 4.80 mm apart. // // Thus center to center the pads are 3.95 mm apart 1.975 mm in X or Y // // Solder Mask is back by 0.05 mm on all edges // // Paste Stencil opening is 0.23 mm x 0.80 mm 77% of land area // // Paste Stencil opening is centered on the Pad Land. // // // Thermal Pad is 2.70 mm on a side square with a small pin 1 notch // // The Thermal Pad Land is square 2.70 mm on a side // // There are 9 Vias in the Thermal Pad all 0.30 mm diameter // // The Thermal Pad Vias are spaced 0.90 mm center to center // // The Thermal Pad Paste Stencil had 4 openings // Each opening is 1.10 mm x 1.10 mm square // There is a 0.30 mm wall vertically and horizontally between openings // Note the Paste Stencil openings are not centered over the vias // Note the paste stencil opening is 66% of the land area // // // // I will use the following Signal Pad Design: // // The pcb signal pads land 0.28 mm x 0.86 mm // The Solder Mask opening 0.38 mm x 0.96 mm centered on land // The Solder Stencil opening 0.24 mm x 0.80 mm centered on land // // The interior tip of the signal pad land is 0.195 mm from // the thermal pad land, i.e. the air gap between the signal // pad land and the thermal pad land is 0.195 mm. // // // // Lay this out with the Pin #1 in the top left-hand corner, NW corner. // // Label the 9 "Thermal Vias" as component pins: 25:33 // //---------------------------------------------------------------------------- $abort_enable = @false; $$lock_windows(@on) ; $$snap_diagonal(@off) ; $$snap_orthogonal(@off) ; //---------------------------------------------------------------------------- // Pads with a long axis vertical $$lock_windows(@on); $$create_pin("qfn_24_vert_pad_27sq", @replace); $$page(0.0,0.0,0.0, @mm, 0.0, 0.0, [0.0, 0.0, 'PI$qfn_24_vert_pad_27sq']); $$point_mode(@vertex); $$polygon( "PAD_1", , [ 0.14, 0.43, -0.14, 0.43, -0.14, -0.43, 0.14, -0.43 ] ); $$polygon( "SOLDER_MASK_1", , [ 0.19, 0.48, -0.19, 0.48, -0.19, -0.48, 0.19, -0.48 ] ); $$polygon( "PASTE_MASK_1", , [ 0.12, 0.40, -0.12, 0.40, -0.12, -0.40, 0.12, -0.40 ] ); $$attribute( "TERMINAL_SURFACE_DEFINITION", ""); //---------------------------------------------------------------------------- //---------------------------------------------------------------------------- // Pads with a long axis horizontal $$lock_windows(@on); $$create_pin("qfn_24_horz_pad_27sq", @replace); $$page(0.0,0.0,0.0, @mm, 0.0, 0.0, [0.0, 0.0, 'PI$qfn_24_horz_pad_27sq']); $$point_mode(@vertex); $$polygon( "PAD_1", , [ 0.43, 0.14, -0.43, 0.14, -0.43, -0.14, 0.43, -0.14 ] ); $$polygon( "SOLDER_MASK_1", , [ 0.48, 0.19, -0.48, 0.19, -0.48, -0.19, 0.48, -0.19 ] ); $$polygon( "PASTE_MASK_1", , [ 0.40, 0.12, -0.40, 0.12, -0.40, -0.12, 0.40, -0.12 ] ); $$attribute( "TERMINAL_SURFACE_DEFINITION", ""); //---------------------------------------------------------------------------- //---------------------------------------------------------------------------- // Through Hole Pin/Pad Stack for the 9 "Thermal Vias" // These are component pins 25 through 33. // // 0.30 mm finished hole diameter // 0.60 mm land pad // 0.85 mm plane relief // 0.28 mm PrePreg_5 flash to indicate a // via that is plugged from the top // // --> 0.275 mm clearance from edge of drill hole to Planes // // --> for 1.00 mm spacing there is a 0.15 mm wide neck // in the Ground web between drills // $$lock_windows(@on); $$create_pin( "qfn_24_thd_pin_27sq" ); $$page(0.0, 0.0, 0.0, @mm, 0.0, 0.0, [ 0.0, 0.0, 'PI$qfn_24_thd_pin_27sq' ] ); $$point_mode(@vertex); $$attribute( "TERMINAL_THRUHOLE_DEFINITION", ""); $$attribute( "TERMINAL_DRILL_SIZE", "", , @scale , , [ 0.30, 0.0 ]); $$circle( "SIGNAL", 0.0, 0.0, 0.60, 0.0 ); $$circle( "POWER", 0.0, 0.0, 0.85, 0.0 ); $$circle( "PREPREG_5", 0.0, 0.0, 0.28, 0.0 ); //---------------------------------------------------------------------------- $$lock_windows(@on) ; $$create_component("qfn_24_27sq", @replace); $$page( 0.0, 0.0, 0.0, @mm, 0.0, 0.0, [ 0.0, 0.0, 'CO$qfn_24_27sq' ]); $$point_mode(@vertex); $$attribute( "COMPONENT_LAYOUT_SURFACE", "both"); $$attribute( "COMPONENT_HEIGHT", "1.20", , @scale , , [0.0, 0.0] ); // // Component Placement Outline for the QFN-24 // $$initial([ -2.50, -2.50 ], , @nosnap ); $$terminal([ -2.50, 2.50 ] ); $$terminal([ 2.50, 2.50 ] ); $$terminal([ 2.50, -2.50 ] ); $$attribute( "COMPONENT_PLACEMENT_OUTLINE", "", @mark, @scale ); // // Silkscreen // $$template_line_style( @Solid ); $$initial([ -2.80, -2.80 ], , @nosnap ); $$terminal([ -2.80, 2.80 ] ); $$terminal([ 2.80, 2.80 ] ); $$terminal([ 2.80, -2.80 ] ); $$terminal([ -2.80, -2.80 ] ); $$path( "SILKSCREEN_1", 0.20 ); $$circle( "SILKSCREEN_1", -3.3, 3.3, 0.5, 0.20 ); $$circle( "SILKSCREEN_1", -3.3, 3.3, 1.0, 0.20 ); // // End of Silkscreen // // Reference Designator $$text( "SILKSCREEN", "^$ref", 0.0, 5.0, 2.0, @CC, 0, 0.7, 0.20, "std", "None", 0.0, 0.0 ); // Setup the Local Fiducial Marks //$$circle( "PAD_1", 0.00, 4.50, 1.0, 0.0); //$$circle( "SOLDER_MASK_1", 0.00, 4.50, 1.3, 0.0); //$$circle( "PAD_1", 0.00, -4.50, 1.0, 0.0); //$$circle( "SOLDER_MASK_1", 0.00, -4.50, 1.3, 0.0); // // Now place the center Thermal Pad // // - Copper on Breakout 1 and Sheet_Dielectric_1 // // - Solder Mask Relief for this Thermal Pad // // - Paste Mask openings // $$polygon( "BREAKOUT_1", , [ -1.35, -1.35, 1.35, -1.35, 1.35, 1.35, -1.35, 1.35 ] ); $$polygon( "SOLDER_MASK_1", , [ -1.40, -1.40, 1.40, -1.40, 1.40, 1.40, -1.40, 1.40 ] ); $$polygon( "SHEET_DIELECTRIC_1", , [ -1.40, -1.40, 1.40, -1.40, 1.40, 1.40, -1.40, 1.40 ] ); $$polygon( "PASTE_MASK_1", , [ -1.25, 0.15, -0.15, 0.15, -0.15, 1.25, -1.25, 1.25 ] ); $$polygon( "PASTE_MASK_1", , [ 0.15, 0.15, 1.25, 0.15, 1.25, 1.25, 0.15, 1.25 ] ); $$polygon( "PASTE_MASK_1", , [ -1.25, -1.25, -0.15, -1.25, -0.15, -0.15, -1.25, -0.15 ] ); $$polygon( "PASTE_MASK_1", , [ 0.15, -1.25, 1.25, -1.25, 1.25, -0.15, 0.15, -0.15 ] ); // Define the pins // Pads Along the Left-Hand Edge $$attribute( "COMPONENT_PIN_DEFINITION", "1", , @scale , , [ -1.975, 1.25 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "1, qfn_24_horz_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "2", , @scale , , [ -1.975, 0.75 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "2, qfn_24_horz_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "3", , @scale , , [ -1.975, 0.25 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "3, qfn_24_horz_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "4", , @scale , , [ -1.975, -0.25 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "4, qfn_24_horz_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "5", , @scale , , [ -1.975, -0.75 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "5, qfn_24_horz_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "6", , @scale , , [ -1.975, -1.25 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "6, qfn_24_horz_pad_27sq"); // Pads Along the Bottom Edge $$attribute( "COMPONENT_PIN_DEFINITION", "7", , @scale , , [ -1.25, -1.975 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "7, qfn_24_vert_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "8", , @scale , , [ -0.75, -1.975 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "8, qfn_24_vert_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "9", , @scale , , [ -0.25, -1.975 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "9, qfn_24_vert_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "10", , @scale , , [ 0.25, -1.975 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "10, qfn_24_vert_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "11", , @scale , , [ 0.75, -1.975 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "11, qfn_24_vert_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "12", , @scale , , [ 1.25, -1.975 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "12, qfn_24_vert_pad_27sq"); // Pads Along the Right-Hand Edge $$attribute( "COMPONENT_PIN_DEFINITION", "13", , @scale , , [ 1.975, -1.25 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "13, qfn_24_horz_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "14", , @scale , , [ 1.975, -0.75 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "14, qfn_24_horz_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "15", , @scale , , [ 1.975, -0.25 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "15, qfn_24_horz_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "16", , @scale , , [ 1.975, 0.25 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "16, qfn_24_horz_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "17", , @scale , , [ 1.975, 0.75 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "17, qfn_24_horz_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "18", , @scale , , [ 1.975, 1.25 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "18, qfn_24_horz_pad_27sq"); // Pads Along the Top Edge $$attribute( "COMPONENT_PIN_DEFINITION", "19", , @scale , , [ 1.25, 1.975 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "19, qfn_24_vert_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "20", , @scale , , [ 0.75, 1.975 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "20, qfn_24_vert_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "21", , @scale , , [ 0.25, 1.975 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "21, qfn_24_vert_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "22", , @scale , , [ -0.25, 1.975 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "22, qfn_24_vert_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "23", , @scale , , [ -0.75, 1.975 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "23, qfn_24_vert_pad_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "24", , @scale , , [ -1.25, 1.975 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "24, qfn_24_vert_pad_27sq"); // // Now the 16 Thermal Vias in the center for the Thermal Pad // $$attribute( "COMPONENT_PIN_DEFINITION", "25", , @scale , , [ -0.90, 0.90 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "25, qfn_24_thd_pin_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "26", , @scale , , [ 0.00, 0.90 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "26, qfn_24_thd_pin_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "27", , @scale , , [ 0.90, 0.90 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "27, qfn_24_thd_pin_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "28", , @scale , , [ -0.90, 0.00 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "28, qfn_24_thd_pin_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "29", , @scale , , [ 0.00, 0.00 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "29, qfn_24_thd_pin_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "30", , @scale , , [ 0.90, 0.00 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "30, qfn_24_thd_pin_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "31", , @scale , , [ -0.90, -0.90 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "31, qfn_24_thd_pin_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "32", , @scale , , [ 0.00, -0.90 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "32, qfn_24_thd_pin_27sq"); $$attribute( "COMPONENT_PIN_DEFINITION", "33", , @scale , , [ 0.90, -0.90 ]); $$attribute( "COMPONENT_PADSTACK_OVERRIDE", "33, qfn_24_thd_pin_27sq"); //----------------------------------------------------------------------------