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General Description

The MAX3161E evaluation kit (EV kit) circuit demon-

strates the RS-232/RS-485/RS-422 multiprotocol trans-

ceivers using the MAX3161E IC. The circuit can be

configured to operate as a dual transceiver in RS-232

mode or as a single transceiver in RS-485/RS-422

mode. The MAX3161E RS-232 data rates can reach

1Mbps, while RS-485/RS-422 data rates can reach

10Mbps. The configurable slew-rate limiting feature

reduces data rates for either protocol to achieve

reduced EMI.

In RS-485/RS-422 mode, the EV kit demonstrates full-

duplex or half-duplex communication. The MAX3161E

drivers feature short-circuit and thermal protection as

well as fail-safe circuitry for open, shorted, or uncon-

nected RS-485/RS-422 receiver inputs. The MAX3161E

EV kit operates from a single 3V to 5.5VDC supply

capable of providing 100mA.

Features

 3V to 5.5V Single-Supply Operation

 Configurable Multiprotocol Operation:

2Tx/2Rx RS-232 Transceivers

Single RS-485/RS-422 Transceiver

 10Mbps RS-485/RS-422 Data Rates and 1Mbps

RS-232 Data Rates

 Configurable RS-232/RS-485 Transmitter Slew

Rates

 Configurable Full-Duplex/Half-Duplex RS-485/

RS-422 Operation

 Fully Assembled and Tested

Evaluates: MAX3161E

MAX3161E Evaluation Kit

________________________________________________________________

Maxim Integrated Products

19-0803; Rev 0; 4/07

Component List

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Ordering Information

Component Supplier

PART TEMP RANGE IC PACKAGE

MAX3161EEVKIT+ 0°C to +70°C* 24 SSOP

SUPPLIER PHONE WEBSITE

Murata Mfg. Co., Ltd. 770-436-1300 www.murata.com

DESIGNATION QTY PART DESCRIPTION

C1, C2, C3, C5 4

0.47µF ±10%, 10V X5R ceramic

capacitors (0603)

Murata GRM188R61A474K

C4 1

0.1µF ±10%, 10V X5R ceramic

capacitor (0402)

Murata GRM155R61A104K

C6 1

10µF ±10%, 10V X5R ceramic

capacitor (0805)

Murata GRM21BR61A106K

J1 1 DB9 male right-angle connector

J2 1 5-position terminal block (5mm)

JU1–JU4, JU9,

JU10

6 2-pin headers

JU5–JU8 4 3-pin headers

R1–R4 4 100kΩ ±5% resistors (0603)

R5, R6 2 120Ω ±1% resistors (1206)

U1 1 MAX3161EEAG+ (24-pin SSOP)

— 10 Shunts (JU1–JU10)

— 1 PCB: MAX3161E Evaluation Kit+

Denotes a lead-free and RoHS-compliant EV kit.

This limited temperature range applies to the EV kit PCB only.

The MAX3161E IC temperature range is -40°C to +85°C.

Note: Indicate that you are using the MAX3161E when contacting

this component supplier.

Summary of content (7 pages)

PAGE 1
9-0803; Rev 0; 4/07 MAX3161E Evaluation Kit The MAX3161E evaluation kit (EV kit) circuit demonstrates the RS-232/RS-485/RS-422 multiprotocol transceivers using the MAX3161E IC. The circuit can be configured to operate as a dual transceiver in RS-232 mode or as a single transceiver in RS-485/RS-422 mode. The MAX3161E RS-232 data rates can reach 1Mbps, while RS-485/RS-422 data rates can reach 10Mbps. The configurable slew-rate limiting feature reduces data rates for either protocol to achieve reduced EMI.
PAGE 2
Evaluates: MAX3161E MAX3161E Evaluation Kit Quick Start Recommended Equipment • 3.3V, 0.5A DC power supply • Logic function generator • Oscilloscope Procedure The MAX3161E EV kit is fully assembled and tested. Follow the steps below to verify board operation. Caution: Do not turn on the power supply until all connections are completed. 1) Verify that shunts are installed across pins 1-2 of jumpers JU5–JU8 (data communications equipment (DCE) mode).
PAGE 3
MAX3161E Evaluation Kit DTE/DCE Connections The EV kit features jumpers JU5, JU6, JU7, and JU8 to configure the RS-232 connector J1 as a data terminal equipment (DTE) or as a data communications equipment (DCE) connector. See Table 5 for configuring the respective jumpers for DTE or DCE connection mode. RS-485/RS-422 Communication Mode EV kit jumper JU4 configures the MAX3161E IC’s RS-485/ RS-422 communication mode to full duplex or half duplex.
PAGE 4
Evaluates: MAX3161E MAX3161E Evaluation Kit RS-232 LEVEL I/O MAX3161EEVKIT+ LOGIC LEVEL I/O U1 T1IN T2IN R1OUT R2OUT DI/T1IN J1* T1OUT T1 T1OUT DE485/T2IN T2OUT T2 R1OUT T2OUT R1IN R1IN R1 R2IN RO/R2OUT R2IN R2 *SEE TABLE 5 FOR J1 PINOUT Figure 1. MAX3161E EV Kit I/O Function in RS-232 Mode LOGIC LEVEL I/O DE485 DI U1 DE485/T2IN J2 Y(A) DI/T1IN D Z(B) RO RS-485/RS-422 LEVEL I/O MAX3161EEVKIT+ B RO/R2OUT Y Y Z Z B B A A R A Figure 2.
PAGE 5
MAX3161E Evaluation Kit 2 VCC 1 C6 10µF C1 0.47µF C4 0.1µF 3 4 GND C2 0.47µF VCC V+ C1+ C2+ C1- C2U1 GND VMAX3161E Y(A) LOGIC LEVEL Z(B) GND B 20 DI/T1IN 19 DE485/T2IN 9 R1OUT 10 R0/R2OUT 24 23 22 DE485/T2IN A C5 0.47µF C3 0.
PAGE 6
Evaluates: MAX3161E MAX3161E Evaluation Kit Figure 4. MAX3161E EV Kit Component Placement Guide— Component Side 6 Figure 5.
PAGE 7
MAX3161E Evaluation Kit Evaluates: MAX3161E Figure 6. MAX3161E EV Kit PCB Layout—Solder Side 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.