MAX33251ESHLD#

Click here for production status of specific part numbers. Evaluates: MAX33251E MAX33251E Shield General Description The MAX33251E Shield is a fully assembled and tested PCB that demonstrates the functionality of the MAX33251E, isolated 1Tx/1Rx RS-232 transceiver, with a galvanic isolation of 600VRMS (60s) between the logic UART side and field side. The isolation barrier protects the logic UART side from electrical transient strikes from the field side. It also breaks ground loops and large differences in ground potentials between the two sides that can corrupt the receiving and sending of data. The MAX33251E conforms to the EIA/TIA-232E standard and operates at data rates up to 1Mbps. Features ●● Single Supply ●● On-Board Isolated DC-DC Power Supply ●● Arduino/Mbed Shield Interface Form Factor ●● DCE/DTE Selectable DB9 Pinout Ordering Information appears at end of data sheet. 319-100307; Rev 0; 2/19 Quick Start Required Equipment ●● ●● ●● ●● MAX33251E Shield 5V, 500mA DC power supply Function generator Digital oscilloscope Procedure The Shield EV kit is fully assembled and tested. Follow the steps below to verify board operation: 1) Place the MAX33251E Shield on a nonconductive surface to ensure that nothing on the PCB gets shorted to the workspace. 2) Connect T1OUT test point to R1IN test point. 3) Disable the output of the function generator. 4) Set the output of the function generator to 500kHz (min = 0V, max = 5V) square wave. 5) Connect the positive terminal of the function generator to D2 on J6. 6) Connect the negative terminal of the function generator to GNDA connector. 7) Connect the positive terminal of 5V supply to VCCA_EXT and VCCB_EXT connectors. 8) Connect the negative terminal of 5V supply to GNDA and GNDB connectors. 9) Connect the positive terminal of 5V supply to pin 7 of the J3 connector (IOREF) 10) Connect the positive terminal of channel 1 of the oscilloscope to D3 on J6. 11) Connect the negative terminal of channel 1 of the oscilloscope to GNDA connector. 12) Enable the output of the function generator. 13) Verify 500kHz 5V square waves appear on oscilloscope. Evaluates: MAX33251E MAX33251E Shield Detailed Description of Hardware MAX33251E Shield is a fully assembled and tested circuit board for evaluating the MAX33251E 1Mbps, 600VRMS isolated RS-232 transceivers. The MAX33251E has a transmitter and a receiver (1Tx/1Rx). The isolation is provided by Maxim’s proprietary insulation material that can withstand 600VRMS for 60 seconds. The MAX33251E conforms to the EIA/TIA-232 standard and operates at data rates up to 1Mbps over the temperature range of -40°C to +85°C. The MAX33251E Shield with an on-board DB9 connector, enables Mbed or Arduino platform to communicate on a RS-232 bus. DCE/DTE DB9 pin out is selectable with the SW1 switch. The MAX14850 digital isolator is used as a level translator with a 3V to 5.5V supply range. To evaluate this device without connecting to a network, a resistive load of 3KΩ to 7KΩ and a capacitive load of 150pF to 1000pF can be placed on R1 and C1, respectively. Powering the Board VCCA of MAX33251E can come from external supply or the Arduino/mbed platform supply. See Table 1 for jumper settings to select appropriate VCCA source. The MAX33251E Shield has an on-board isolated power supply that generates an isolated supply for VCCB. If the shield board is connected to an Arduino/mbed platform, input of the isolated power supply is connected to the 5V output (pin 4 of J3) of the Arduino/mbed platform. The voltage generated on the isolated output is the same as the input. See Table 1 for jumper settings to select appropriate VCCB source. The isolated supply generated by the transformer driver requires a 5V supply from the mbed/Arduino board. Set JU1 to 1-3 position to connect mbed/Arduino 5V supply to VCCA. Table 1. Jumper Settings JUMPER SHUNT POSITION JU1 JU2 JU3 JU4 JU5D0 Transceiver VCCA connects to 3.3V on Arduino/mbed connector (J3) 1-3 Transceiver VCCA connects to 5V on Arduino/mbed connector (J3) 1-4* Transceiver VCCA connects to VCCA_EXT connector 1-2 Transceiver VCCB connects to the output of the isolated power supply 2-3* Transceiver VCCB connects to VCCB_EXT connector 1-2* Transceiver T1IN connects to the level translator OPEN 1-2* OPEN Transceiver R1OUT connects to Arduino/mbed connector’s D0 signal Arduino/mbed connector’s D0 signal is not connected 1-2 Transceiver T1IN connects to Arduino/mbed connector’s D1 signal 2-3 Transceiver R1OUT connects to Arduino/mbed connector’s D1 signal Arduino/mbed connector’s D1 signal is not connected 1-2* Transceiver T1IN connects to Arduino/mbed connector’s D2 signal 2-3 Transceiver R1OUT connects to Arduino/mbed connector’s D2 signal Arduino/mbed connector’s D2 signal is not connected 1-2 Transceiver T1IN connects to Arduino/mbed connector’s D3 signal 2-3* Transceiver R1OUT connects to Arduino/mbed connector’s D3 signal OPEN www.maximintegrated.com Transceiver R1OUT disconnects from the level translator 2-3 OPEN JU5D3 Transceiver R1OUT connects to the level translator Transceiver T1IN connects to Arduino/mbed connector’s D0 signal OPEN* JU5D2 Transceiver T1IN disconnects from the level translator 1-2* OPEN* JU5D1 DESCRIPTION 1-2 Arduino/mbed connector’s D3 signal is not connected Maxim Integrated │  2 Evaluates: MAX33251E MAX33251E Shield Table 1. Jumper Settings (continued) JUMPER SHUNT POSITION JU5D6 1-2 Transceiver T1IN connects to Arduino/mbed connector’s D6 signal 2-3 Transceiver R1OUT connects to Arduino/mbed connector’s D6 signal OPEN* JU5D7 Transceiver T1IN connects to Arduino/mbed connector’s D7 signal 2-3 Transceiver R1OUT connects to Arduino/mbed connector’s D7 signal Arduino/mbed connector’s D7 signal is not connected 1-2 Transceiver T1IN connects to Arduino/mbed connector’s D8 signal 2-3 Transceiver R1OUT connects to Arduino/mbed connector’s D8 signal OPEN* JU5D9 Arduino/mbed connector’s D6 signal is not connected 1-2 OPEN* JU5D8 DESCRIPTION Arduino/mbed connector’s D8 signal is not connected 1-2 Transceiver T1IN connects to Arduino/mbed connector’s D9 signal 2-3 Transceiver R1OUT connects to Arduino/mbed connector’s D9 signal OPEN* Arduino/mbed connector’s D9 signal is not connected *Default position. Ordering Information PART TYPE MAX33251ESHLD# SHIELD #Denotes RoHS-compliant. www.maximintegrated.com Maxim Integrated │  3 Evaluates: MAX33251E MAX33251E Shield MAX33251E Shield Bill of Materials ITEM REF_DES QTY 1 C1, C2 2 C1608X5R1A106K080AC MFG PART # MANUFACTURER TDK VALUE 10UF CAPACITOR; SMT (0603); CERAMIC CHIP; 10UF; 10V; TOL = 10%; MODEL =; TG = -55°C TO +85°C; TC = X5R 2 C3-C7 5 C0603C104K8RAC KEMET 0.1UF CAPACITOR; SMT (0603); CERAMIC CHIP; 0.1UF; 10V; TOL = 10%; MODEL = C0603 SERIES; TG = -55°C TO +125°C; TC = X7R 3 C8 1 C0603C334K4RAC KEMET 0.33UF CAPACITOR; SMT (0603); CERAMIC CHIP; 0.33uF; 16V; TOL = 10%; MODEL=; TG = -55°C TO +125°C; TC = X7R 4 D1, D2 2 MBR0520L FAIRCHILD SEMICONDUCTOR MBR0520L 5.1V DIODE; ZNR; SMT (SOD-123); VZ = 5.1V; IZ = 0.02A TEST POINT; PIN DIA = 0.125IN; TOTAL LENGTH = 0.35IN; BOARD HOLE = 0.063IN; BLACK; PHOSPHOR BRONZE WIRE SILVER PLATE FINISH; 5 D3 1 MMSZ5231B-7-F DIODES INCORPORATED 6 GNDA, GNDB 2 5006 KEYSTONE N/A DESCRIPTION DIODE, SCHOTTKY, SOD-123, PIV = 20V, Vf = 0.385V@If = 0.5A, If(ave) = 0.5A 7 J3, J6 2 SSQ-108-04-G-S SAMTEC SSQ-108-04-G-S 8 J4 1 SSQ-106-04-G-S SAMTEC SSQ-106-04-G-S CONNECTOR; FEMALE; THROUGH HOLE; .025IN SQ POST SOCKET; STRAIGHT; 6PINS ; 9 J5 1 SSQ-110-04-G-S SAMTEC SSQ-110-04-G-S CONNECTOR; FEMALE; THROUGH HOLE; .025IN SQ POST SOCKET; STRAIGHT; 10PINS ; 10 JU1 1 PEC04SAAN SULLINS ELECTRONICS CORP. PEC04SAAN CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT; 4PINS 11 JU2, JU5D0-JU5D3, JU5D6-JU5D9 9 PEC03SAAN SULLINS PEC03SAAN CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT; 3PINS 12 JU3, JU4 2 PBC02SAAN SULLINS ELECTRONICS CORP. PBC02SAAN EVKIT PART-CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY; STRAIGHT; 2PINS; -65°C TO +125°C; 13 P1 1 182-009-213R531 NORCOMP 182-009-213R531 14 R1IN, R1OUT, T1IN, T1OUT 4 5004 KEYSTONE N/A 15 SW1 1 MFS401N-2-Z NIDEC COPAL ELECTRONICS CORP MFS401N-2-Z SWITCH; 4PDT; THROUGH HOLE; STRAIGHT; +5V TO +30V; 0.01A-0.3A; MFS SERIES; RCONTACT = 0.02Ω; RINSULATION = 100MΩ 16 T1 1 TGM-050P3RL HALO ELECTRONICS INC TGM-050P3RL TRANSFORMER; SMT; 1:1:1:1; PCMCIA DC/DC CONVERTER 17 U1 1 MAX33251EELC+ MAXIM MAX33251EELC+ EVKIT PART-IC; MAX33251E; LGA12; 6X6MM; 1MM PITCH; PACKAGE OUTLINE DRAWING: 21-100222; PACKAGE CODE: L1266M+1 18 19 U2 U3 1 1 MAX14850AEE+ MAX845EUA+ MAXIM MAXIM MAX14850AEE+ MAX845EUA+ IC; ISO; SIX-CHANNEL DIGITAL ISOLATOR; QSOP16 IC; DRV; ISOLATED TRANSFORMER DRIVER; UMAX8 20 VCCA_EXT, VCCB_EXT 2 5005 KEYSTONE N/A TEST POINT; PIN DIA=0.125IN; TOTAL LENGTH = 0.35IN; BOARD HOLE = 0.063IN; RED; PHOSPHOR BRONZE WIRE SILVER PLATE FINISH; PCB:MAX33251ESHIELD 1 CONNECTOR; FEMALE; THROUGH HOLE; D-SUBMINIATURE CONNECTOR; RIGHT ANGLE; 9PINS TEST POINT; PIN DIA = 0.1IN; TOTAL LENGTH = 0.3IN; BOARD HOLE = 0.04IN; YELLOW; PHOSPHOR BRONZE WIRE SILVER PLATE FINISH; 21 PCB MAXIM PCB 22 R1 DNP 0 N/A N/A OPEN RESISTOR; 0603; OPEN; FORMFACTOR 23 C9 DNP 0 N/A N/A OPEN CAPACITOR; SMT (0603); OPEN; FORMFACTOR TOTAL www.maximintegrated.com MAX33251E PCB CONNECTOR; FEMALE; THROUGH HOLE; .025IN SQ POST SOCKET; STRAIGHT; 8PINS ; 42 Maxim Integrated │  4 GNDA VCCA_EXT 5V 2 4 C1 10UF 3 1 JU1 C2 10UF T1IN_U1 JU2 R1OUT_U1 GNDB VCCB_EXT VCCA_U1 1 2 3 SD FS 4 3 C7 0.1UF R1OUT C3 0.1UF 1 8 D1 D2 8 7 6 5 4 3 2 1 6 5 4 3 2 1 J4 J3 T1IN NC R1OUT NC GNDA 2 3 4 5 6 7 12 INB1 INB2 OUTA1 OUTA2 7 6 5 2 3 4 T1 TGM-050P3RL 8 1 GNDB 13 GNDA 14 5 15 OUTB2 INA2 4 OUTB1 INA1 3 10 2 11 I/OB2 I/OA2 A A C C MBR0520L D2 MBR0520L D1 T1OUT J6 J5 VCCA_U1 U2 MAX14850AEE+ I/OB1 I/OA1 7 VCCB C5 0.1UF VCCA_U1 8 NC 9 GNDB 10 11 NC T1OUT R1IN 12 C6 0.1UF VCCB_U1 VCCB VCCA 6 C4 0.1UF IOREF VCCA 1 U1 MAX33251EELC+ IOREF VCCA_U1 3.3V U3 MAX845EUA+ IOREF 5V T1IN T1IN R1OUT VCCB_U1 5V 1 8 5VISO GND1 2 16 9 3.3V 6 GND2 7 VCC NC 5 D3 5.1V C www.maximintegrated.com 1 1 R1IN A 8 7 6 5 4 3 2 1 10 9 8 7 6 5 4 3 2 1 0.33UF C8 5VISO JU4 JU3 2 2 R1OUT_U1 T1IN_U1 R1IN T1OUT T1OUT P1.2 P1.3 P1.2 P1.3 D7 D6 D5 D4 D3 D2 D1 D0 D13 D12 D11 D10 D9 D8 5 4 3 2 1 9 7 6 4 3 1 OPEN C9 OPEN R1 P1 182-009-213R531 12 10 MFS401N-2-Z 11 8 5 2 SW1 9 8 7 6 T1OUT R1IN R1IN T1OUT D0 D1 D2 D3 D6 D7 D8 D9 T1IN R1OUT 1 2 3 JU5D0 JU5D1 JU5D2 1 2 3 JU5D3 1 2 3 JU5D6 JU5D7 JU5D8 JU5D9 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 MAX33251E Shield Evaluates: MAX33251E MAX33251E Shield Schematics Maxim Integrated │  5 Evaluates: MAX33251E MAX33251E Shield MAX33251E Shield Layout Diagrams 1.0’’ MAX33251E Shield—Top Silkscreen 1.0’’ MAX33251E Shield—Top View www.maximintegrated.com Maxim Integrated │  6 Evaluates: MAX33251E MAX33251E Shield MAX33251E Shield Layout Diagrams (continued) 1.0’’ MAX33251E Shield—Internal Layer 2 1.0’’ MAX33251E Shield—Internal Layer 3 www.maximintegrated.com Maxim Integrated │  7 Evaluates: MAX33251E MAX33251E Shield MAX33251E Shield Layout Diagrams (continued) 1.0’’ MAX33251E Shield—Bottom View 1.0’’ MAX33251E Shield—Silkscreen Bottom www.maximintegrated.com Maxim Integrated │  8 Evaluates: MAX33251E MAX33251E Shield Revision History REVISION NUMBER REVISION DATE 0 2/19 DESCRIPTION Initial release PAGES CHANGED — For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html. 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 specifications without notice at any time. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. ©  2019 Maxim Integrated Products, Inc. │  9