general description the MAX20328A evaluation kit (ev kit) is a fully assembled and tested circuit for evaluating the max20328/ MAX20328A mux switch for usb-c audio adapter applications. the device features automatic mic-gnd orientation and headphone impedance detection, beyond- the-rails? signal capability, and surge protection on pins attached to the usb-c connector. this ev kit enables fast and easy evaluation of the max20328/MAX20328A switches in usb-c audio applications. the ev kit is populated with MAX20328A. the max20328 and MAX20328A are pin-to-pin and register compatible. users can install their own max20328 for evaluation. features automatic mic/gnd orientation detection ? mic line bias check safeguards against shorting mic to gnd 3.5mm audio jack for testing with audio signals onboard usb receptacles for passing and measuring data signals proven pcb layout fully assembled and tested 319-100192; rev 0; 5/18 ordering information appears at end of data sheet. beyond-the-rails is a trademark of maxim integrated products, inc. quick start required equipment the following equipment is required to verify the basic functionality of this ev kit: 5v capable power supply host device with i 2 c communication support dmm or continuity tester optional equipment the following equipment can be used for more complete testing of this ev kit: usb flash drive or other device with a usb-a male connector usb a-to-b cable usb c cable trrs 3.5mm audio cable trrs 3.5mm audio device with 3.5mm to usb-c passive adapter procedure the ev kit is fully assembled and tested. follow the steps below to verify board operation: 1) verify the positions of the confguration resistor pairs r1 and r2, r4 and r5, and r6 and r8. a) for evaluating max20328, r1, r4, and r6 should be installed. b) for evaluating MAX20328A, r2, r5, and r8 should be installed. 2) verify shunts are installed on jumpers ju1 and on ju3 in the 1-2 position. ju3 selects the source of the v cc supply. 3) connect the positive lead of a 2.7 to 5v power supply to tp12 and the negative lead to tp14, then safely turn on the supply. 4) connect scl of the i 2 c device to tp16 and sda to tp17; or use the 40-pin connector. 5) read register 0x00 using the i 2 c read address 0x2b. if the data read matches the device_id value of the installed device (table 5 of the max20328/MAX20328A data sheet), the ev kit is confgured correctly. click here for production status of specifc part numbers. evaluates: MAX20328A, max20328 MAX20328A evaluation kit
maxim integrated 2 to test automatic audio headset detection and switch configuration, use the following procedure: 1) after establishing communication with the ev kit device, verify that automatic headset detection is enabled. enable it if needed. 2) supply an audio signal to the 3.5mm jack j7 on the ev kit. 3) insert a trrs headset with usb-c passive adapter (this will not work for active adapters) and verify the audio signal is routed to the headset. detailed description of hardware the MAX20328A ev kit is a fully assembled and tested pcb for evaluating the max20328 and MAX20328A usb-c audio mux switches. although the max20328 and MAX20328A have slightly different features, the same hardware can be used to evaluate both devices. by installing combinations of 0 resistors, the signals will be routed correctly for the selected device. hardware connectors the MAX20328A ev kit contains several usb connectors and a 3.5mm audio jack to conveniently check the functionality of different signal paths. usb connectors a usb-c female connector connects to the top- (dp_t, dm_t) and bottom-side (dp_b, dm_b) d+/d- data lines, sbu lines, and the cc2 pin to the max20328/MAX20328A as they would in a typical application. alternatively, two usb-b female connectors are also available to provide these signals independently. j2 connects to dp_b and dm_b, and j4 connects to dp_t and dm_t. two usb-a female connectors allow for testing data transfer to a usb flashdrive or similar device with a usb-a male connector. j1 connects to the bottom side data pins and j6 connects to the top side data pins. 3.5mm audio jack the ev kit also includes a 3.5mm jack for evaluating the audio signal routing action. the trrs jack j7 simplifies injecting an audio signal into the ev kit. when a 3.5mm audio headset is detected on the usb-c input by means of a passive adapter, the signal coming into j7 will be routed to the usb-c connector and the headset. table 1. jumper configurations *default position jumper shunt position description ju1 installed* connects v cc of the device to the ev kit supply. not installed v cc of the device disconnected from ev kit supply. ju2 installed attaches a 3.92k pullup resistor to v cc on int of the MAX20328A. not installed* no pullup on MAX20328A int pin. ju3 1-2* connects ev kit supply to tp12 for an external supply voltage. 2-3 connects ev kit supply to the 3.3v line of the 40-pin connector. ju4 installed connects a 3.92k pullup resistor from scl to the 3.3v line of the 40-pin connector. not installed* no pullup on scl to 3.3v line. ju5 installed connects a 3.92k pullup resistor from sda to the 3.3v line of the 40-pin connector. not installed* no pullup on sda to 3.3v line. ju6 1-2* ties u1 cc pin to v cc through a 10k pullup resistor. leave open or shunt 1-2 to use j3 cc. 2-3 ties u1 cc pin to ground. leave open or shunt 1-2 to use j3 cc. ju7 installed* j3 cc is connected to u1 cc and pulled to voltage selected by ju6. not installed u1 cc is foating or tied to voltage selected by ju6. ju8 installed* connects gsns_l (max20328) or gsns (MAX20328A) to agnd. not installed gsns_l (max20328) or gsns (MAX20328A) not connected to agnd. ju9 installed connects gsns_r (max20328) to agnd. not installed* connects gsns_r (max20328) to agnd. www.maximintegrated.com evaluates: MAX20328A, max20328 MAX20328A evaluation kit
maxim integrated 3 table 2. test point assignments #denotes rohs compliant. part type MAX20328Aevkit# ev kit test point signal tp1 mic tp2 agnd tp3 la tp4 ra tp5 gsns_l (max20328) or gsns (MAX20328A) tp6 gsns_r (max20328 only) tp7 tx (MAX20328A only) tp8 v cc of u1 tp9 ground tp10 rx (MAX20328A only) test point signal tp11 int (MAX20328A only) tp12 external supply connection tp13 v cc of ev kit board tp14 ground tp15 ground tp16 scl tp17 sda tp18 cc2 pin of connector j3. connects to cc of max20328/MAX20328A if a shunt is present on ju7. ordering information www.maximintegrated.com evaluates: MAX20328A, max20328 MAX20328A evaluation kit
maxim integrated 4 MAX20328A ev kit bill of materials item ref_des dni/d np qty mfg part # mfg value description 1 c1-c4 - 4 0603yd105kat2a; cl10a105ko8nnn avx;samsung electro- mechanics 1uf capacitor; smt (0603); ceramic chip; 1uf; 16v; tol=10%; tg=-55 degc to +85 degc; tc=x5r 2 j1, j6 - 2 87520-0010blf fci connect 87520- 0010blf connector; female; through hole; usb receptacle; right angle; 4pins 3 j2, j4 - 2 690-004-221-023 edac 690-004-221- 023 connector; female; through hole; usb-b type; single deck; right angle; 4pins 4 j3 - 1 898-73-024-90-310001 mill-max 898-73-024-90- 310001 connector; female; smt; ; right angle; 24pins 5 j5 - 1 sbh11-pbpc-d20-st-bk sullins electronics corp. sbh11-pbpc- d20-st-bk connector; male; through hole; header connector; straight; 40pins; edge footprint 6 j7 - 1 sj-435107rs cui inc. sj-435107rs connector; female; through hole; sj-435107 series; 3.5 mm audio jack; right angle; 6pins 7 ju1, ju2, ju4, ju5, ju7-ju9 - 7 68000-102hlf fci connect 68000-102hlf connector; male; through hole; 6800 series; bergstik ii header; straight; 2pins 8 ju3, ju6 - 2 68001-203hlf fci connect 68001-203hlf connector; male; through hole; bergstik breakaway header; straight; 3pins 9 led1-led4 - 4 sml-lx1206gw-tr lumex optocomponents inc sml- lx1206gw-tr diode; led; standard; green; smt (1206); piv=2.2v; if=0.02a; -4 0 degc to +85 degc 10 r2, r5, r8 - 3 rc0805jr-070rl yageo phycomp 0 resistor; 0805; 0 ohm ; 5%; jumper; 0.125w; thick film 11 r3, r9-r11 - 4 crcw08051k00fk; erj-6enf1001v; mcr10ezhf1001;rc0805fr-071kl vishay dale; panasonic; rohm; yageo 1k resistor; 0805; 1k; 1%; 100ppm; 0.125w; thick film 12 r7, r12, r13 - 3 crcw08053k92fk;mcr10ezhf3921; rc0805fr-073k92l vishay dale;rohm semiconductor;yageo 3.92k resistor; 0805; 3.92k ohm; 1%; 100ppm; 0.125w; thick film 13 r14 - 1 crcw080510k0fk; mcr10ezhf1002; erj-6enf1002v; rc0805fr-0710kl vishay dale; rohm semi; murata; yageo 10k resistor; 0805; 10k; 1%; 100ppm; 0.125w; thick film 14 tp1, tp8, tp13 - 3 5116 keystone n/a test point; pin dia=0.1in; total length=0.3in; board hole=0.04i n; green; phosphor bronze wire silver plate finish; 15 tp2 - 1 5118 keystone n/a test point; pin dia=0.1in; total length=0.3in; board hole=0.04i n; grey; phosphor bronze wire silver plate finish; 16 tp3, tp7, tp16, tp18 - 4 5004 keystone n/a test point; pin dia=0.1in; total length=0.3in; board hole=0.04i n; yellow; phosphor bronze wire silver plate finish; 17 tp4, tp10 - 2 5000 keystone n/a test point; pin dia=0.1in; total length=0.3in; board hole=0.04i n; red; phosphor bronze wire silver plate finish; 18 tp5 - 1 5117 keystone n/a test point; pin dia=0.1in; total length=0.3in; board hole=0.04i n; blue; phosphor bronze wire silver plate finish; 19 tp6, tp11, tp17 - 3 5003 keystone n/a test point; pin dia=0.1in; total length=0.3in; board hole=0.04i n; orange; phosphor bronze wire silver plate finish; 20 tp9, tp14, tp15 - 3 5011 keystone n/a test point; pin dia=0.125in; total length=0.445in; board hole=0.063in; black; phosphor bronze wire silver plate finish; 21 tp12 - 1 5010 keystone n/ a testpoint with 1.80mm hole dia, red, multipurpose; 22 u1 - 1 max20328ewa+ maxim max20328ew a+ evkit part - ic; infc; mux switch for usb type-c; audio adapter accessories; wlp25; pkg. code: w252r2+2; pkg. outline: 21-100208 23 pcb - 1 max20328 a maxim pcb pcb:max20328 a 24 r1, r4, r6 dnp 0 rc0805jr-070rl yageo phycomp 0 resistor; 0805; 0 o hm; 5%; jumper; 0.125w; thick film total 55 www.maximintegrated.com evaluates: MAX20328A, max20328 MAX20328A evaluation kit
maxim integrated 5 j4 d2 1 2 5 6 mic dm_ap2 b4 j6 87520-0010blf 4 3 b2 a2 sda c2 1uf c1 MAX20328Aewa+ ju1 tp1 b1 dp_b a7 b3 dm_ap2 2 dm_b 3 c1 e3 ju3 1uf b2 gsns_r sj-435107rs a5 cc dm_t r6 cc_u1 a11 a9 a8 cc r5 e2 a3 a2 a1 tp7 tp10 1 c3 ca led2 tp13 b12 b10 b9 a6 a4 j3 ca led1 r3 6 5 4 3 2 1 j2 1 6 4 j1 tp4 tp3 tp5 tp2 2 1 ju8 tp6 2 1 ju9 7 6 5 4 3 2 1 j7 tp8 2 1 r14 3 1 ju6 2 1 r4 e4 e1 d5 d4 d3 c5 c4 c3 b5 b1 a1 u1 sbu1 tx 68000-102hlf dp_t dm_ap1 dp_ap1 690-004-221-023 87520-0010blf la ra la mic 68000-102hlf la dp_ap2 vcc sbu2 gsns_l dm_t vcc 1k sml-lx1206gw-tr dp_ap2 1k sbu1 gm_sl_rx rx a3 r1 0 dni 0 dni 1 tp12 68001-203hlf r9 ra b11 tp15 a12 sbu2 b4 b5 b6 b7 b8 dp_b a10 gsns_l d1 2 ju7 sbu1 2 4 3 dp_ap1 scl 5 6 c4 1 1uf 690-004-221-023 dm_t dp_t c 1k r10 8 dm_ap1 dm_b 0 rx r11 1k ac 5vmc sml-lx1206gw-tr 68000-102hlf ju4 3.92k 0 898-73-024-90-310001 dm_b 68000-102hlf c2 1uf 5 a led3 sml-lx1206gw-tr gsns_r r2 tp14 1 2 2 sda vmc r12 3.92k vmc ju5 tp16 scl r13 3 tp17 68000-102hlf sml-lx1206gw-tr vcc 2 tx 68000-102hlf 10k b3 68001-203hlf dp_b r8 0 mg_sl_tx 2 1 dp_t r7 tp9 tp18 e5 a5 a4 sbu2 sbu1 vcc dni 0 ju2 intb tp11 sbu2 68000-102hlf j5 vmc intb vmc sda scl sbh11-pbpc-d20-st-bk 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 1 3 4 2 led4 3.92k 5vmc gnd rx1+ rx1- vbus sbu2 d- d+ cc2 vbus tx2- tx2+ gnd gnd rx2+ rx2- vbus sbu1 d- d+ cc1 vbus tx1- tx1+ gnd shield gnd d+ d- vbus 65 1 4 3 2 65 1 4 3 2 shield gnd d+ d- vbus shield 6 5 4 2 1 3 dm_ap1 la sbu1_mg mic cc dm_t sbu2_gm ra dp_ap2 sda int scl vcc tx rx gsns gm_sr dp_t dgnd agnd mg_sr dp_b dm_ap2 dm_b dp_ap1 MAX20328A ev kit schematic www.maximintegrated.com evaluates: MAX20328A, max20328 MAX20328A evaluation kit
maxim integrated 6 MAX20328A ev kittop silkscreen MAX20328A ev kitlayer 2 MAX20328A ev kittop MAX20328A ev kit pcb layout diagrams www.maximintegrated.com evaluates: MAX20328A, max20328 MAX20328A evaluation kit
maxim integrated 7 MAX20328A ev kitlayer 3 MAX20328A ev kitbottom silkscreen MAX20328A ev kitbottom MAX20328A ev kit pcb layout diagrams (continued) www.maximintegrated.com evaluates: MAX20328A, max20328 MAX20328A evaluation kit
? 2018 maxim integrated products, inc. 8 revision number revision date description pages changed 0 5/18 initial release revision history maxim integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim integrated product. no circuit patent licenses are implied. maxim integrated reserves the right to change the circuitry and specifcations without notice at any time. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. evaluates: MAX20328A, max20328 MAX20328A evaluation kit for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com.
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