MAX1490EBCPG+ Maxim Integrated Products, MAX1490EBCPG+ Datasheet

IC RS485/RS422 DATA INTRFC 24DIP

MAX1490EBCPG+

Manufacturer Part Number
MAX1490EBCPG+
Description
IC RS485/RS422 DATA INTRFC 24DIP
Manufacturer
Maxim Integrated Products
Type
Transceiverr
Datasheet
1.MAX1480ECEPI.pdf (19 pages)

Specifications of MAX1490EBCPG+

Number Of Drivers/receivers
1/1
Protocol
RS422, RS485
Voltage - Supply
4.5 V ~ 5.5 V
Mounting Type
Through Hole
Package / Case
24-DIP (0.600", 15.24mm)
Data Rate
250 Kbps
Operating Supply Voltage
5 V
Supply Current
130 mA
Operating Temperature Range
0 C to + 70 C
Maximum Power Dissipation
696 mW
Mounting Style
Through Hole
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
_________________General Description
The MAX1480EA/MAX1480EC/MAX1490EA/MAX1490EB
are complete, electrically isolated, RS-485/RS-422 data
communications interface solutions in a hybrid microcir-
cuit. The RS-485/RS-422 I/O pins are protected against
±15kV electrostatic discharge (ESD) shocks, without
latchup. Transceivers, optocouplers, and a transformer
provide a complete interface in a standard DIP package.
A single +5V supply on the logic side powers both sides
of the interface.
The MAX1480EC/MAX1490EB feature reduced-slew-rate
drivers that minimize EMI and reduce reflections caused
by improperly terminated cables, allowing error-free data
transmission at data rates up to 160kbps. The
MAX1480EA/MAX1490EA driver slew rate is not limited,
allowing transmission rates up to 2.5Mbps. The
MAX1480EA/MAX1480EC are designed for half-duplex
communication, while the MAX1490EA/MAX1490EB fea-
ture full-duplex communication.
Drivers are short-circuit current limited and protected
against excessive power dissipation by thermal shut-
down circuitry that places the driver outputs into a high-
impedance state. The receiver input has a fail-safe
feature that guarantees a known output (RO low for the
MAX1480EA/MAX1480EC, RO high for the MAX1490EA/
MAX1490EB) if the input is open circuit.
The MAX1480EA/MAX1480EC/MAX1490EA/MAX1490EB
withstand 1260V
lated outputs meet all RS-485/RS-422 specifications. The
MAX1480EA/MAX1480EC are available in a 28-pin DIP
package, and the MAX1490EA/MAX1490EB are available
in a 24-pin DIP package.
.
________________________Applications
19-1940; Rev 0; 4/01
Selector Guide appears at end of data sheet.
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.
±15kV ESD-Protected, Isolated RS-485/RS-422
Isolated RS-485/RS-422 Data Interface
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
Automatic Test Equipment
HVAC/Building Control Networks
Telecom
RMS
________________________________________________________________ Maxim Integrated Products
(1min) or 1520V
RMS
(1s). Their iso-
o Isolated Data Interface, Guaranteed to 1260V
o ±15kV ESD Protection on I/O Pins
o Slew-Rate Limited for Errorless Data
o High-Speed, Isolated, 2.5Mbps RS-485/RS-422
o Full-Duplex Data Communication
o Single +5V Supply
o Current Limiting and Thermal Shutdown for
o Standard 0.6in DIP Packages
_______________Ordering Information
Ordering Information continued at end of data sheet.
†
up to 250kbps.
*See Reliability section at end of data sheet.
____________________________Features
MAX1480EACPI
MAX1480EAEPI
Data rate for A parts is up to 2.5Mbps. Data rate for C parts is
(1min)
Transmission (MAX1480EC/MAX1490EB)
Interface (MAX1480EA/MAX1490EA)
Driver Overload Protection
Pin Configurations continued at end of data sheet.
28-Pin DIP (MAX1480EA/MAX1480EC)
24-Pin DIP (MAX1490EA/MAX1490EB)
TOP VIEW
(MAX1490EA/MAX1490EB)
PART
†
GND1
GND2
V
V
V
V
CC1
CC2
CC3
CC4
SD
RO
D1
D2
FS
DI
10
11
12
6
Data Interfaces
1
2
3
4
5
7
8
9
TEMP. RANGE
-40°C to +85°C
ISOLATION BARRIER
0°C to +70°C
DIP
Pin Configurations
24
22
21
20
19
18
17
16
15
14
13
23
28 Wide Plastic DIP*
28 Wide Plastic DIP*
PIN-PACKAGE
AC1
AC2
ISO V
ISO RO DRV
A
B
ISO COM1
ISO DI DRV
Y
ISO RO LED
Z
ISO V
CC1
CC2
MAX1490EA/
MAX1490EB
RMS
1

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MAX1490EBCPG+ Summary of contents

Page 1

... Industrial-Control Local Area Networks Automatic Test Equipment HVAC/Building Control Networks Telecom Selector Guide appears at end of data sheet. ________________________________________________________________ Maxim Integrated Products 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. ____________________________Features o Isolated Data Interface, Guaranteed to 1260V (1min) o ± ...

Page 2

ESD-Protected, Isolated RS-485/RS-422 Data Interfaces ABSOLUTE MAXIMUM RATINGS With Respect to GND_ Supply Voltage (V )..........................................-0.3V to +6V CC_ Control Input Voltage (SD, FS)..............-0. Receiver Output Voltage (RO, RO).......-0. Output Switch Voltage (D1, D2).......................................+12V With ...

Page 3

ESD-Protected, Isolated RS-485/RS-422 ELECTRICAL CHARACTERISTICS (continued +5V ±10 CC_ FS CC_ A (Notes 1, 2) PARAMETER SYMBOL Change in Magnitude of ∆V Driver Output Voltage for Complementary Output States Driver ...

Page 4

ESD-Protected, Isolated RS-485/RS-422 Data Interfaces SWITCHING CHARACTERISTICS—MAX1480EA/MAX1490EA (continued +5V ±10 CC_ FS CC_ A MIN PARAMETER SYMBOL | Differential PLH PHL t SKD Receiver Skew Maximum Data ...

Page 5

ESD-Protected, Isolated RS-485/RS-422 __________________________________________Typical Operating Characteristics (V = +5V Figures 1 and 2, T CC_ FS CC_ OUTPUT CURRENT vs. RECEIVER OUTPUT LOW VOLTAGE 80 MEASURED AT ISO RO DRV ...

Page 6

ESD-Protected, Isolated RS-485/RS-422 Data Interfaces ____________________________Typical Operating Characteristics (continued +5V Figures 1 and 2, T CC_ FS CC_ MAX1480EA SUPPLY CURRENT vs. TEMPERATURE 160 R = 54Ω +5.5V CC 140 ...

Page 7

ESD-Protected, Isolated RS-485/RS-422 _____________________________Typical Operating Characteristics (continued) ´ +5V ´ CC_ FS CC_ DI MAX1480EC/MAX1490EB RECEIVER t PHL MAX1480E/90E toc16 200ns/div ´ ...

Page 8

ESD-Protected, Isolated RS-485/RS-422 Data Interfaces ________________________________________________________________Pin Description PIN NAME MAX1480EA/ MAX1490EA/ MAX1480EC MAX1490EB CC1 D1 GND1 ...

Page 9

ESD-Protected, Isolated RS-485/RS-422 ___________________________________________________Pin Description (continued) PIN MAX1480EA/ MAX1490EA/ MAX1480EC MAX1490EB — 17 — 18 — 19 — — ISO — ISO — ISO RO DRV 25 — 26 ...

Page 10

ESD-Protected, Isolated RS-485/RS-422 Data Interfaces V CC3 MAX845E Q OSC T F/F FS 1.07MHz/ 1.45MHz + 22µF 0.1µF 74HC86 OR EQUIVALENT R1* DI DRIVER INPUT ´ DI R2* DE DRIVER ENABLE ´ DE ...

Page 11

ESD-Protected, Isolated RS-485/RS-422 V CC3 Q OSC T F/F FS 1.07MHz/ 1.45MHz +5V V CC1 CC2 22µF 0.1µF D1 GND1 SD 74HC86 V CC3 OR EQUIVALENT R1* DI DRIVER INPUT ´ DI ...

Page 12

ESD-Protected, Isolated RS-485/RS-422 Data Interfaces V IN +5V SHUTDOWN ´ DI ´ Figure 3. MAX1480EA Low-Power Shutdown Mode ISOLATION BARRIER Figure 4. Driver DC Test Load 12 ______________________________________________________________________________________ V CC1 1 V CC2 2 ...

Page 13

ESD-Protected, Isolated RS-485/RS-422 ____________________________________________________Test Circuits (continued 0.4V CC_ V - 0.4V 2 CC_ ´ PLH 1 ( (B) DIFF 90% ...

Page 14

ESD-Protected, Isolated RS-485/RS-422 Data Interfaces cuits over the entire common-mode range (see Typical Operating Characteristics). In addition, a thermal shut- down circuit forces the driver outputs into a high-im pedance state if the die temperature rises excessively. Propagation Delay ...

Page 15

ESD-Protected, Isolated RS-485/RS-422 ___________Applications Information These E versions of the MAX1480EA/MAX1480EC/ 1490EA/MAX1490EB provide extra protection against ESD. The rugged MAX1480EA/MAX1480EC/MAX1490EA/ MAX1490EB are intended for harsh environments where high-speed communication is important. These devices eliminate the need for transient suppressor ...

Page 16

ESD-Protected, Isolated RS-485/RS-422 Data Interfaces + 22µF 0.1µF 74HC86 OR EQUIVALENT R1 DI DRIVER INPUT R2 DE DRIVER ENABLE R3 RECEIVER OUTPUT RO Figure 15. Typical ...

Page 17

ESD-Protected, Isolated RS-485/RS-422 V IN +5V V CC1 22µF 0.1µF CC2 GND1 74HC86 V CC3 8 OR EQUIVALENT ´ ...

Page 18

ESD-Protected, Isolated RS-485/RS-422 Data Interfaces rents may flow. These currents are by their nature unsta- ble and unpredictable. In addition, they may cause noise to be injected into sensitive instrumentation and, in severe cases, might actually cause physical damage ...

Page 19

... 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___________________ 19 © 2001 Maxim Integrated Products ...

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