Renesas RTKA788152DE0000BU Manual Download Page 9

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R15UZ0002EU0100 Rev.1.00

Page 9

Oct 6, 2021

RTKA788152DE0000BU Evaluation Board Manual

2.3

Board Layout

Ceramic CAP

Murata

GRM21BR61E106MA73

Multilayer Cap

Various

Generic

Multilayer Cap

Various

Generic

Multilayer Cap

Various

Generic

R1, R2

Metal Film Chip Resistor (Do Not Populate)

Various

Generic

Thick Film Chip Resistor

Various

Generic

Thick Film Chip Resistor

Various

Generic

JP1

Two Pin Jumper

Various

Generic

RS-485 Transceiver

Renesas Electronics

RAA7881522GSP#

Figure 13. Top Layer

Figure 14. Bottom Layer

Figure 15. Top Silkscreen

Qty

Reference

Designator

Description

Manufacturer

Part Number

Summary of Contents for RTKA788152DE0000BU

Page 1: ...lex Transceiver RAA788152 115kbps version currently installed can be unsoldered and replaced by RAA788155 1Mbps version or RAA788158 20Mbps version Place holders for fail safe biasing resistors Configuration jumpers to operate the transceiver as transmitter or receiver or as a transmitter with loopback Figure 1 Block Diagram A B C 1 2 4 3 5 6 8 7 GND A Y VCC B Z RO DE DI RE RO RE DE DI VCC B Z A Y...

Page 2: ...scription 3 1 1 Operational Characteristics 3 1 1 1 Driver Operation 3 1 1 2 Receiver Operation 3 1 2 Bus and Receiver Output Voltages 4 1 2 1 Set Up 4 1 2 2 Measurement Graphs 5 2 Board Design 7 2 1 Schematic Diagrams 8 2 2 Bill of Materials 8 2 3 Board Layout 9 3 Ordering Information 10 4 Revision History 10 ...

Page 3: ...ferential receiver inputs A and B the bus voltage is defined as VAB VA VB For VAB 0 05V RO turns high and for VAB 0 2V RO turns low For input voltages between 50mV and 200mV the state of RO is undetermined and therefore can be high or low A logic high at RE disables the receiver making RO high impedance In this condition the polarity and magnitude of the input voltage is irrelevant To ensure the r...

Page 4: ...iven high L X 0 05 VAB 0 2V Undetermined Actively drives bus low L X VAB 0 02 L RO is data driven low L X Inputs Open Shorted H RO is failsafe high H H X Z Receiver disabled RO is high impedance H L X Z Shutdown mode driver and receiver disabled for more than 600ns Figure 3 Setup for Bus and Receiver Output Voltage Measurement with Oscilloscope Power Supply and Function Generator 25V Tr ack Di spl...

Page 5: ...ut Voltage vs Time Figure 6 B Z Channel Output Voltage vs Time 0 5 0 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 5 0 4 0 3 0 2 0 1 0 0 0 1 0 2 0 3 0 4 0 5 0 Voltage V Time µs 0 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 5 0 4 0 3 0 2 0 1 0 0 0 1 0 2 0 3 0 4 0 5 0 Voltage V Time µs 0 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 5 0 4 0 3 0 2 0 1 0 0 0 1 0 2 0 3 0 4 0 5 0 Voltage V Time µs ...

Page 6: ...vs Time Figure 9 Driver Input Voltage vs Receiver Output Voltage 0 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 5 0 4 0 3 0 2 0 1 0 0 0 1 0 2 0 3 0 4 0 5 0 Voltage V Time µs 1 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 5 0 4 0 3 0 2 0 1 0 0 0 1 0 2 0 3 0 4 0 5 0 Voltage V Time µs 1 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 5 0 4 0 3 0 2 0 1 0 0 0 1 0 2 0 3 0 4 0 5 0 Voltage V Time µs ...

Page 7: ...00BU Evaluation Board Manual 2 Board Design Figure 10 Bus Output Voltage vs Receiver Output Voltage Figure 11 RTKA788152DE0000BU Evaluation Board Top 0 5 0 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 5 0 4 0 3 0 2 0 1 0 0 0 1 0 2 0 3 0 4 0 5 0 Voltage V Time µs ...

Page 8: ...nt 0 100 Pad 0 040 Thole Keystone 5003 2 A Y B Z Miniature Yellow Test Point 0 100 Pad 0 040 Thole Keystone 5004 1 DE_J Dual Row Vertical PCB Connector Molex 90151 3X06 1 RE _J Dual Row Vertical PCB Connector Molex 90151 3X08 DE_J 3 RE RO DE DI B Z VCC A Y GND U1 RAA7881522GSP 1 2 3 4 5 6 7 8 B Z IN 5 RE _J 8 RT 121 DE_J 1 VCC R3 0 IN 4 RE _J 6 JP1 1 2 RE _J 7 POWER 2 OUT 4 IN 3 RE _J 4 R1 DNP RE ...

Page 9: ...ultilayer Cap Various Generic 2 R1 R2 Metal Film Chip Resistor Do Not Populate Various Generic 1 R3 Thick Film Chip Resistor Various Generic 1 RT Thick Film Chip Resistor Various Generic 1 JP1 Two Pin Jumper Various Generic 1 U1 RS 485 Transceiver Renesas Electronics RAA7881522GSP Figure 13 Top Layer Figure 14 Bottom Layer Figure 15 Top Silkscreen Qty Reference Designator Description Manufacturer ...

Page 10: ...ge 10 Oct 6 2021 RTKA788152DE0000BU Evaluation Board Manual 3 Ordering Information 4 Revision History Part Number Description RTKA788152DE0000BU RAA788152 Evaluation Board Revision Date Description 1 00 Oct 6 2021 Initial release ...

Page 11: ...RTY RIGHTS These resources are intended for developers skilled in the art designing with Renesas products You are solely responsible for 1 selecting the appropriate products for your application 2 designing validating and testing your application and 3 ensuring your application meets applicable standards and any other safety security or other requirements These resources are subject to change with...

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