MAX3160 Maxim Integrated Products, MAX3160 Datasheet

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MAX3160

Manufacturer Part Number
MAX3160
Description
Manufacturer
Maxim Integrated Products
Datasheet

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The MAX3160/MAX3161/MAX3162 are programmable
RS-232/RS-485/422 multiprotocol transceivers. The
MAX3160/MAX3161 are pin programmable as a 2TX/2RX
RS-232 interface or a single RS-485/422 transceiver. The
MAX3162 is configured as a 2TX/2RX RS-232 interface
and a single RS-485/422 transceiver simultaneously.
All devices incorporate a proprietary low-dropout trans-
mitter output stage and an on-board dual charge pump
to allow RS-232 and RS-485/422 compliant perfor-
mance from a +3V to +5.5V supply. The receivers
feature true fail-safe circuitry that guarantees a logic-
high receiver output when the receiver inputs are open
or shorted. These devices also feature pin-selectable
transmitter slew rates for both RS-232 and RS-485/422
modes. Slew-rate limiting minimizes EMI and reduces
reflections caused by improperly terminated cables,
allowing error-free data transmission up to 250kbps.
Disabling slew-rate limiting allows these devices to
transmit at data rates up to 10Mbps in RS-485/422
mode and up to 1Mbps in RS-232 mode. The
MAX3160/MAX3161/MAX3162 feature a 1µA shutdown
mode, and short-circuit limiting and thermal shutdown
circuitry to protect against excessive power dissipation.
The MAX3160/MAX3162 offer a flow-through pinout that
facilitates board layout. The MAX3160/MAX3161/
MAX3162 are available in tiny SSOP packages and
operate over the commercial and extended tempera-
ture ranges.
19-1722; Rev 1; 3/06
Pin Configurations appear at end of data sheet.
Selector Guide appears at end of data sheet.
________________________Applications
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX3160CAP
MAX3160EAP
MAX3161CAG
MAX3161EAG
MAX3162CAI
MAX3162EAI
Point-of-Sales Equipment
Industrial Controls
RS-232 to RS-485
Interface Converters
PART
________________________________________________________________ Maxim Integrated Products
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
+3.0V to+5.5V, 1µA, RS-232/RS-485/422
Ordering Information
0°C to +70°C
0°C to +70°C
0°C to +70°C
General Description
Peripherals
Networking
PIN-PACKAGE
20 SSOP
20 SSOP
24 SSOP
24 SSOP
28 SSOP
28 SSOP
Multiprotocol Transceivers
♦ Single-Supply Operation from +3V to +5.5V
♦ Pin-Programmable as 2TX/2RX RS-232 or Single
♦ 2TX/2RX RS-232 and Single RS-485/422
♦ Pin-Programmable RS-232/RS-485 Transmitter
♦ 10Mbps RS-485 and 1Mbps RS-232 Data Rates
♦ Pin-Programmable Half-Duplex or Full-Duplex
♦ RS-485/422 True Fail-Safe Receivers
♦ Transmitters and Receivers Protected Against
♦ 1µA Shutdown Supply Current
♦ 1/8-Unit Load Allows up to 256 Transceivers on
RS-485/422 (MAX3160/MAX3161)
(MAX3162)
Slew Rates Reduce EMI
RS-485/422 Operation (MAX3160/MAX3161)
Wiring Faults
the Bus
MAX3100
µP
SPI
13
11
12
10
SHDN
CTS
RX
TX
RTS
RO/R2OUT
DE/T2IN
DI/T1IN
R1OUT
Typical Operating Circuit
16
15
7
8
GND FAST HDPLX SHDN
4
+3V TO +5.5V
MAX3160
10
V
CC
RS485/RS232
1
12
9
11
13
14
Z(B)/T1OUT
5
Y(A)/T2OUT
A/R2IN
B/R1IN
6
Features
RJ45
DB9
1

Related parts for MAX3160

MAX3160 Summary of contents

Page 1

... RS-232/RS-485/422 General Description The MAX3160/MAX3161/MAX3162 are programmable RS-232/RS-485/422 multiprotocol transceivers. The MAX3160/MAX3161 are pin programmable as a 2TX/2RX RS-232 interface or a single RS-485/422 transceiver. The MAX3162 is configured as a 2TX/2RX RS-232 interface and a single RS-485/422 transceiver simultaneously. All devices incorporate a proprietary low-dropout trans- ...

Page 2

... MAX316_EA_ .................................................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Junction Temperature ......................................................+150°C Lead Temperature (soldering, 10s) .................................+300°C + 0.3V +25°C.) A CONDITIONS MAX3160/MAX3161, no load, RS485/ RS232 = GND MAX3160/MAX3161, no load, CC RS485/ RS232 = V CC MAX3162 No Load SHDN = GND, receiver inputs open or CC grounded ...

Page 3

... MAX3160 48 MAX3161/ 96 MAX3162 V = +12V 0. -7V -0. +12V 0.125 -7V -0.075 CM -200 -50 30 ±5 ±5.4 300 10M ±30 ±60 MAX3160/ ±125 MAX3161 ±25 MAX3162 R = 27Ω 1.5 (RS-485 50Ω 2 (RS-422) -0.2 0.2 3 0.2 UNITS kΩ kΩ Ω mA µ ...

Page 4

... Driver Output Disable Time t DLZ t RPLH, Receiver Propagation Delay t RPHL Receiver Propagation Delay t RSKEW Skew 4 _______________________________________________________________________________________ = +25°C.) A CONDITIONS +12V to – MAX3160 +12V DE485 = GND or SHDN = MAX3161 I O GND MAX3162 R = 3kΩ 1000pF L L R_IN to R_OUT 150pF ...

Page 5

... RZL Receiver Output Disable Time t RLZ Note 2: Applies for MAX3162 and MAX3160/MAX3161 with HDPLX = GND for MAX3160/MAX3161 with HDPLX = +3.3V, 250kbps data rate, 0.1µF capacitors, all RS-232 transmitters (RS-232 mode) loaded with 3kΩ to ground unless otherwise noted.) RS-232 TRANSMITTER OUTPUT VOLTAGE vs. ...

Page 6

... OUTPUT LOW VOLTAGE (V) RS-485/422 DRIVER DIFFERENTIAL OUTPUT vs. TEMPERATURE 3 50Ω 3.4 3.3 3.2 3.1 3.0 2.9 2.8 2.7 2.6 2.5 -40 - TEMPERATURE (°C) = +25°C, A MAX3160/MAX3161 NO-LOAD SUPPLY CURRENT vs. TEMPERATURE 3.0 2.5 RS-485 MODE 2.0 1.5 RS-232 MODE 1.0 0 -40 - TEMPERATURE (°C) RS-485/422 OUTPUT CURRENT vs. DRIVER OUTPUT HIGH VOLTAGE 180 160 140 120 ...

Page 7

... TEMPERATURE (°C) RS-485/422 DRIVER PROPAGATION (SLOW, 250kbps) DI 5V/div 2V/div 1.0µs/div RS-485/422 DRIVER DISABLE/ENABLE TO DRIVER OUTPUT 2V/div R = 50Ω 82pF L RO 2V/div 100ns/div = +25° MAX3160/2 TOC21 DI 5V/div 2V/div MAX3160/2 TOC24 DE485 2V/div 2V/div 7 ...

Page 8

... RS-232/RS-485/422 Multiprotocol Transceivers PIN MAX3160 MAX3161 — — — — — — — — — — — — — — — — _______________________________________________________________________________________ NAME MAX3162 1 C1+ ...

Page 9

... RS-232/RS-485/422 PIN MAX3160 MAX3161 MAX3162 13 — 14 — — — — — — — — — — — — — — — — — _______________________________________________________________________________________ Multiprotocol Transceivers Pin Description (continued) NAME Noninverting RS-485/422 Receiver Input/RS-232 — ...

Page 10

... CHARGE PUMP C1 BYPASS GND RS-232 OUTPUTS LOGIC OUTPUTS SHDN 10 FAST RS-485/RS-232 10 ______________________________________________________________________________________ MAX3160 C2 C2 BYPASS RS-485 LOGIC OUTPUTS INPUTS 15 14 RS-232 INPUTS LOGIC 13 OUTPUT 12 HDPLX 11 Functional Diagrams ...

Page 11

RS-232/RS-485/422 RS-232 MODE CHARGE PUMP C1 BYPASS GND RS-232 6 OUTPUTS LOGIC OUTPUTS SHDN HDPLX 12 ...

Page 12

RS-232/RS-485/422 Multiprotocol Transceivers Functional Diagrams (continued) MAX3162 CHARGE PUMP C1 BYPASS GND 4 RS-232 5 OUTPUT Z 6 RS-485 D OUTPUTS DE485 Y 7 RS-232 8 OUTPUT ...

Page 13

RS-232/RS-485/422 500Ω OUTPUT UNDER TEST C L Figure 4. RS-485/422 Driver Enable/Disable Timing Test Load 3V DE485 1. DZL Y, Z 2.3V OUTPUT NORMALLY LOW V OL OUTPUT NORMALLY HIGH ...

Page 14

... I/O pins. The MAX3160 has common transmitter outputs and receiver inputs for its RS-232 and RS-485/422 trans- ceivers, and common digital I/O pins. The MAX3160 is optimized for multiprotocol operation on a single inter- face bus and comes in a 20-pin SSOP. The MAX3161 has separate transmitter outputs and receiver inputs for its RS-232 and RS-485/422 trans- ceivers, and common digital I/O pins ...

Page 15

... GND) with worst-case loads of 3kΩ in parallel with 1000pF. Data rates up to 1Mbps can be achieved by asserting FAST. When powered down or in shutdown, the MAX3160/ MAX3161/MAX3162 outputs are high impedance and can be driven to ±12V. The transmitter inputs do not have pullup resistors ...

Page 16

... The standard RS-485 receiver input impedance is 12kΩ (one-unit load), and the standard driver can drive up to 32-unit loads. The MAX3160 has a 1/4-unit load receiv- er input impedance (48kΩ), allowing up to 128 trans- Truth Tables ...

Page 17

... Table 9. MAX3162 INPUTS SHDN DE485 Table 10. MAX3160 SHDN RS485/RS232 and Z correspond to pins Y(A)/T2OUT and Z(B)/T1OUT. A and B correspond to pins A/R2IN and B/R1IN. ______________________________________________________________________________________ Multiprotocol Transceivers ...

Page 18

... EIA/TIA-485 standards require a common input voltage range of -7V to +12V to prevent damage to the device. The MAX3160/MAX3161/MAX3162 inputs are protected to RS-232 levels of ±25V for the receiver inputs and ±13.2V for the transmitter/driver outputs. This provides = GND), the RS- additional protection for the RS-485 transceivers against ground differential or faults due to miswiring ...

Page 19

... Z and Y. RS-485 signals received on A and B are trans- mitted as an RS-232 signal on T The Typical Operating Circuit shows a standard appli- cation for the MAX3160. The MAX3160’s output pins are multiplexed between RS-232 and RS-485 protocols by a microprocessor (µP). The µP also directs the shut- down functions, enable lines, and the duplex of the MAX3160 ...

Page 20

... NOTE: RE485 ON MAX3162 ONLY Figure 14. RS-485 Line Repeater transfers data through the MAX3160 to the pin-selected RS-232 or RS-485 protocal; see Table 14 for commonly used cable connections. Multiprotocol Bus Multiplexer The Typical Application Circuit shows the MAX3161 con- figured as a multiprotocol bus multiplexer. The MAX3161 separates the RS-232 and RS-485 lines, but shares the logic pins between modes ...

Page 21

... PIN DCD DTR DSR 6 RTS 7 CTS MAX3100 UART SPI µP ______________________________________________________________________________________ Multiprotocol Transceivers MAX3160 MAX3161 PIN NUMBER MAX3162 EQUIVALENT MAX3160 MAX3161 R2IN 13 17 T1OUT 5 5 GND 4 4 T2OUT 6 8 R1IN HDPLX CC TX DI/T1IN RO/R2OUT 10 ...

Page 22

... Y(A)/T2OUT 6 15 DE485/T2IN R1OUT 7 14 B/R1IN RO/R2OUT 8 13 A/R2IN SHDN 9 12 HDPLX FAST 10 11 RS-485/RS-232 20-PIN SSOP Selector Guide FLOW- PART DUAL-MODE THROUGH PIN-OUT MAX3160 No Yes MAX3161 No No MAX3162 Yes Yes 22 ______________________________________________________________________________________ C1 C2 C2- GND 4 21 ...

Page 23

... 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. 23 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2006 Maxim Integrated Products ...

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