MAX1490EACPG Maxim Integrated, MAX1490EACPG Datasheet

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MAX1490EACPG

Manufacturer Part Number
MAX1490EACPG
Description
RS-422/RS-485 Interface IC
Manufacturer
Maxim Integrated
Datasheet
1.MAX1480ECCPI.pdf (19 pages)

Specifications of MAX1490EACPG

Data Rate
2.5 Mbps
Operating Supply Voltage
5 V
Supply Current
180 mA
Operating Temperature Range
0 C to + 70 C
Mounting Style
Through Hole
Package / Case
PDIP-24
Maximum Power Dissipation
696 mW

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Bonase Electronics (HK) Co., Limited Bonase Electronics (HK) Co., Limited
Part Number:
MAX1490EACPG+
Manufacturer:
Maxim Integrated Products
Quantity:
135
_________________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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MAX1490EACPG 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

... ESD-Protected, Isolated RS-485/RS-422 Ordering Information (continued) † PART TEMP. RANGE MAX1480ECCPI 0°C to +70°C MAX1480ECEPI -40°C to +85°C MAX1490EACPG 0°C to +70°C MAX1490EAEPG -40°C to +85°C MAX1490EBCPG 0°C to +70°C MAX1490EBEPG -40°C to +85°C † Data rate for A parts 2500kbps. Data rate for C parts 250kbps ...

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