31.35mm [1.23''] + ic thickness top view side view (section aa) 30.23mm [1.190"] 25.48mm [1.003"] a a a l l t o l e r a n c e s : 0.125mm (unless stated otherwise). materials and specifications are subject to change without notice. status: released drawing: h. hansen scale: 1.25:1 rev: b date: 2/1/06 modified: 3/15/07 file: SS-QFN40A-01 dwg SS-QFN40A-01 drawing 1 2 6 5 3 page 1 of 4 features directly mounts to target pcb (needs tooling holes) with hardware minimum real estate required compression plate distributes forces evenly clamshell lid 4 7 customer's pcb 8 9 ? 2006 ironwood electronics, inc. 11351 rupp drive, suite 400, burnsville, mn 55337 tele: (952) 229-8200 www.ironwo odelectronics.com compression plate: black anodized aluminum. thickness = 6.5 mm. compression screw: clear anodized aluminum. height = 21 mm, fluted knob pogo pin: plungers - hardened steel/ gold plated barrel - copper alloy/ gold plated spring - stainless steel/ gold wire pogo pin guides: ultem 1000. socket base: black anodized aluminum. height = 4.5 mm. clam shell lid: black anodized aluminum. height = 14.5 mm. socket base screw: socket head cap screw, alloy steel with black oxide finish, 0-80 thread, 5/8" long. 1 m a t e r i a l s : 2 3 4 5 6 7 8 9 pogo pin guide screw: pan head phillips, 18-8 ss, 0-80 thread, 3/16" long. latch: black anodized aluminum. 10 10 ic guide: ultem. 11 insualtion plate: fr4/g10 12 backing plate: black anodized aluminum. 12 11
**** to effectively conduct heat away from the package a thermal pad is recommended with vias spaced 1.0 to 1.2 mm pitch and a diameter of 0.3 to 0.33 mm. ideally 1 via for every 3 leads has been shown to work well. 1.250mm 0.125mm (x2) 1.250mm 0.125mm (x2) non plated alignment hole orientation mark pad (x 40) 4.58mm x 4.58mm thermal /gnd pad non plated mounting hole backing plate size 12.225mm 0.125mm socket body size socket body size 12.600mm 0.125mm 3.00mm 2.00mm 9.725mm (x4) ? 0.850mm 0.025mm (x2) 0.69 x 0.28mm 1.68mm 6.36mm 4.78mm 6.36mm 4.78mm 0.50mm typ. 14.725mm ? 1.75mm 0.050mm (x4) 2.72mm* page 2 of 4 recommended pcb layout tolerances: 0.025mm [0.001?] unless stated otherwise. r e c o m m e n d e d p c b l a y o u t t o p v i e w t a r g e t p c b r e c o m m e n d a t i o n s total thickness: 1.6mm min. plating: gold or solder finish pcb pad height: same or higher than solder mask status: released drawing: h. hansen scale: 4:1 rev: b date: 2/1/06 modified: 3/15/07 file: SS-QFN40A-01 dwg SS-QFN40A-01 drawing t a r g e t p c b r e c o m m e n d a t i o n s total thickness: 1.6mm min. plating: gold or solder finish pcb pad height: same or higher than solder mask * n o t e : m l f p a t t e r n i s n o t s y m m e t r i c a l w i t h r e s p e c t t o t h e m o u n t i n g h o l e s . i t i s o f f s e t 0 . 2 5 m m t o t h e r i g h t o f c e n t e r . all dimensions are in mm. ? 2006 ironwood electronics, inc. 11351 rupp drive, suite 400, burnsville, mn 55337 tele: (952) 229-8200 www.ironwo odelectronics.com
dim min max a 0.85 a1 0.02 b 0.23 d e e 6.00 bsc 6.00 bsc 0.5 bsc 40 leads l 0.40 c o m p a t i b l e m l f s p e c d e a a1 e l b top view side view bottom view dimensions are in millimeters. interpret dimensions and toleraces per asme y14.5m-1994. 1. 2. page 3 of 4 t a r g e t p c b r e c o m m e n d a t i o n s total thickness: 1.6mm min. plating: gold or solder finish pcb pad height: same or higher than solder mask status: released drawing: h. hansen scale: rev: b date: 2/1/06 modified: 3/15/07 file: SS-QFN40A-01 dwg SS-QFN40A-01 drawing ? 2006 ironwood electronics, inc. 11351 rupp drive, suite 400, burnsville, mn 55337 tele: (952) 229-8200 www.ironwo odelectronics.com
page 4 of 4 t a r g e t p c b r e c o m m e n d a t i o n s total thickness: 1.6mm min. plating: gold or solder finish pcb pad height: same or higher than solder mask status: released drawing: h. hansen scale: rev: b date: 2/1/06 modified: 3/15/07 file: SS-QFN40A-01 dwg SS-QFN40A-01 drawing description: i n s u l a t i o n p l a t e a n d b a c k i n g p l a t e all dimensions are in mm. all tolerences are +/- 0.125mm. (unless stated otherwise) top view side view note: backing plate holes are tapped to accept 0-80 screws. ? 2006 ironwood electronics, inc. 11351 rupp drive, suite 400, burnsville, mn 55337 tele: (952) 229-8200 www.ironwo odelectronics.com 14.73mm 2.50mm 2.50mm 9.725mm 0.025mm (x4) 3.00mm sqr. 5.94mm 1.50mm 3.50mm ? 1.61mm 0.05mm (x4) 1.27mm (x4) 1.59mm 6.35mm insulation plate backing plate 14.73mm
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