general description the MAX14850PMB1 peripheral module utilizes the max14850 digital isolator to isolate another spi- or uart- based module from any host system that utilizes pmod k - compatible expansion ports configurable for either a uart or spi interface. this peripheral module is first plugged into the host pmod port. another uart- or spi-based module plugged into the 12-pin pmod-compatible connector on this peripheral module is galvanically isolated from the host and referenced to a secondary power supply connected to this peripheral module. the ic is a 6-channel digital isolator utilizing maxims pro - prietary process technology, whose monolithic design provides a compact and low-cost transfer of digital signals between circuits with different power domains. of the six total channels, the four unidirectional channels are each capable of dc to 50mbps, with two of the four chan - nels passing data across the isolation barrier in each direction. the two bidirectional channels are open drain and each is capable of data rates from dc to 2mbps. refer to the max14850 ic data sheet for detailed informa - tion regarding operation of the ic. features s isolates spi- or uart-based pmod-compatible modules from the host system s data rates from 2mbps to 20mbps or greater, depending on configuration s 2-pin header to connect external voltage for isolated module s 600v rms isolation for 60s s isolates four spi or uart signals and two control signals s short-circuit protection on unidirectional outputs s 12-pin pmod-compatible male connector to host s 12-pin pmod-compatible female connection for module to be isolated s rohs compliant s proven pcb layout s fully assembled and tested _________________________________________________________________ maxim integrated products 1 19-6331; rev 0; 5/12 ordering information appears at end of data sheet. MAX14850PMB1 peripheral module pmod is a trademark of digilent inc. MAX14850PMB1 peripheral module for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxims website at www.maxim-ic.com.
designation qty description c1, c2 2 0.1 f f q 10%, 16v x7r ceramic capacitors (0603) murata grm188r71c104ka01d c3 1 1 f f q 10%, 10v x7r ceramic capacitor (0603) tdk c1608x7r1a105k j1 1 12-pin (2 x 6) right-angle male header designation qty description j2 1 12-pin (2 x 6) right-angle female header j3 1 2-pin straight male header r1Cr6 6 150 i q 5% resistors (0603) r7Cr10 4 4.7k i q 5% resistors (0603) u1 1 6-channel digital isolator (16 so) maxim max14850ase+ 1 pcb: epcb14850pm1 supplier phone website murata electronics north america, inc. 770-436-1300 www.murata-northamerica.com tdk corp. 847-803-6100 www.component.tdk.com pin signal description 1 ss_cts serial select/clear to send 2 mosi_txd master-out slave input/host transmit 3 miso_rxd master-in slave output/host receive 4 sck_rts serial clock/ready to send 5 gnd ground 6 vcc power supply 7 sparein spare input from pmod to host 8 n.c. not connected 9 n.c. not connected 10 spareio spare input/output 11 gnd ground 12 vcc power supply _________________________________________________________________ maxim integrated products 2 component suppliers note: indicate that you are using the MAX14850PMB1 when contacting these component suppliers. component list detailed description uart interface the MAX14850PMB1 peripheral module can interface to the host by plugging directly into a pmod-compatible port (configured for spi or uart) through connector j1. see table 1. connector j2 provides the galvanically isolated connec - tion to another peripheral module. note that even though the pinout numbering is different than j1, the signals from the top row of pins on j1 are passed through to the top row of pins on j2. see table 2. connector j3 provides power from the 2nd power domain to the isolated side of the ic and the isolated pmod. software and fpga code example software and drivers are available that execute directly without modification on several fpga devel - opment boards that support an integrated or synthe - sized microprocessor. these boards include the digilent nexys 3, avnet lx9, and avnet zedboard, although other platforms can be added over time. maxim provides complete xilinx ise projects containing hdl, platform studio, and sdk projects. in addition, a synthesized bit stream, ready for fpga download, is provided for the demonstration application. the software project (for the sdk) contains several source files intended to accelerate customer evalu - ation and design. these include a base application (maximmodules.c) that demonstrates module functional - ity, and uses an api interface (maximdevicespecific utilities.c) to set and access maxim device functions within a specific module. the source code is written in standard ansi c format, and all api documentation including theory/operation, register description, and function prototypes are documented in the api interface file (maximdevicespecificutilities.h & .c). the complete software kit is available for download at www.maxim-ic.com . quick start instructions are also available as a separate document. table 1. connector j1 (with spi /uart peripheral attached to j2) MAX14850PMB1 peripheral module
pin signal description 1 o_sparein spare input from pmod to host 2 n.c. not connected 3 n.c. not connected 4 o_spareio spare input/output 5 o_gnd ground from 2nd power domain (supplied through j3) 6 o_vcc power from 2nd power domain (supplied through j3) 7 o_ss_cts serial select/clear to send 8 o_mosi_txd master-out slave input/host transmit 9 o_miso_rxd master-in slave output/host receive 10 o_sck_rts serial clock/ready to send 11 o_gnd ground from 2nd power domain (supplied through j3) 12 o_vcc power from 2nd power domain (supplied through j3) pin signal description 1 o_vcc vcc for the 2nd power domain (up to 600v rms separation) 2 o_gnd ground for the 2nd power domain i na1 2 in a2 3 ou ta 1 4 ou ta 2 5 i/ oa 1 6 i/ oa 2 7 v cca 1 gn da 8 gn db 9 i/ ob 2 10 i/ ob 1 11 in b2 12 in b1 13 ou tb 2 14 ou tb 1 15 v ccb 16 m ax1 48 50 u1 vc c gn d o_ gnd o_ vc c o_ vc c o_ gn d gn d vc c sc k- rt s sp ar ei n ss-c ts sp ar ei o 1 2 j3 o_ vc c o_ gnd host side periph eral side o_ gn d ex te rn al po we r co nn ec to r o_ gn d o_ vc c gn d vc c gn d vc c mo si-t xd miso -rx d sc k- rt s ss-c ts 15 0 r6 15 0 r3 15 0 r4 15 0 r5 1 2 3 4 5 6 7 8 9 10 11 12 j1 1 2 3 4 5 6 7 8 9 10 11 12 j2 mo si-t xd miso -r xd o_ gnd o_ vc c 4. 7k r7 4. 7k r8 0. 1uf c1 0. 1u f c2 1u f c3 15 0 r1 15 0 r2 sp ar ei o sp ar ei n vc c vc c 4. 7k r9 4. 7k r1 0 o_ vc c o_ vc c o_ mo si -t xd o_ mi so -r xd o_ sc k- rt s o_ ss -c ts o_ sp ar ei o o_ sp ar ei n o_ mo si -t xd o_ mi so -r xd o_ sc k- rt s o_ ss -c ts o_ sp ar ei o o_ sp ar ei n _________________________________________________________________ maxim integrated products 3 figure 1. MAX14850PMB1 peripheral module schematic table 2. connector j2 table 3. connector j3 MAX14850PMB1 peripheral module
_________________________________________________________________ maxim integrated products 4 figure 2. MAX14850PMB1 peripheral module component placement guidecomponent side figure 3. MAX14850PMB1 peripheral module pcb layoutcomponent side figure 4. MAX14850PMB1 peripheral module pcb layoutinner layer 1 (ground) MAX14850PMB1 peripheral module
_________________________________________________________________ maxim integrated products 5 figure 5. MAX14850PMB1 peripheral module pcb layoutinner layer 2 (power) figure 6. MAX14850PMB1 peripheral module pcb layoutsolder side figure 7. MAX14850PMB1 peripheral module component placement guidesolder side MAX14850PMB1 peripheral module
part type MAX14850PMB1# peripheral module _________________________________________________________________ maxim integrated products 6 ordering information # denotes rohs compliant. MAX14850PMB1 peripheral module
revision number revision date description pages changed 0 5/12 initial release maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circuit patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 7 ? 2012 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. revision history MAX14850PMB1 peripheral module
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