MAX1480BEPI+ Maxim Integrated Products, MAX1480BEPI+ Datasheet

IC RS485/RS422 DATA INTRFC 28DIP

MAX1480BEPI+

Manufacturer Part Number
MAX1480BEPI+
Description
IC RS485/RS422 DATA INTRFC 28DIP
Manufacturer
Maxim Integrated Products
Type
Transceiverr
Datasheet

Specifications of MAX1480BEPI+

Number Of Drivers/receivers
1/1
Protocol
RS422, RS485
Voltage - Supply
4.5 V ~ 5.5 V
Mounting Type
Through Hole
Package / Case
28-DIP (0.600", 15.24mm)
Package
28PDIP
Data Transmission Topology
Multidrop|Multipoint
Data Rate
0.25(Min) Mbps
Function
Line Transceiver
Number Of Transmitters
1
Transmitter Signal Type
Differential
Transmitter Communication Type
RS-422|RS-485
Driving Mode
3-State
Typical Single Supply Voltage
5 V
Number Of Channels Per Chip
1
Supply Voltage (max)
5.5 V
Supply Voltage (min)
4.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
Interface
RS-485, RS-422
Maximum Power Dissipation
727 mW
Minimum Operating Temperature
- 40 C
Supply Current
95 mA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
_________________General Description
The MAX1480A/MAX1480B/MAX1480C/MAX1490A/
MAX1490B are complete, electrically isolated, RS-485/
RS-422 data-communications interface solutions in a
hybrid microcircuit. Transceivers, optocouplers, and a
transformer provide a complete interface in a standard
DIP package. A single +5V supply on the logic side pow-
ers both sides of the interface.
The MAX1480B/MAX1480C/MAX1490B feature reduced-
slew-rate drivers that minimize EMI and reduce reflec-
tions caused by improperly terminated cables, allowing
error-free data transmission at data rates up to 250kbps.
The MAX1480A/MAX1490A driver slew rate is not limited,
allowing transmission rates up to 2.5Mbps. The
MAX1480A/B/C are designed for half-duplex communi-
cation, while the MAX1490A/B feature full-duplex com-
munication.
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
MAX1480A/B/C, RO high for the MAX1490A/B) if the
input is open circuit.
The MAX1480A/MAX1480B/MAX1480C/MAX1490A/
MAX1490B typically withstand 1600V
2000V
RS-485/RS-422 specifications. The MAX1480A/B/C are
available in a 28-pin DIP package, and the MAX1490A/B
are available in a 24-pin DIP package.
________________________Applications
19-0259; Rev 5; 5/05
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
RMS
Isolated RS-485/RS-422 Data Interface
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
Automatic Test Equipment
HVAC/Building Control Networks
(1 second). Their isolated outputs meet all
________________________________________________________________ Maxim Integrated Products
Complete, Isolated RS-485/RS-422
RMS
(1 minute) or
♦ ♦ For Integrated ESD Protection
♦ ♦ For Space-Constrained Applications
_______________Ordering Information
Ordering Information continued at end of data sheet.
“C” parts is up to 250kbps.
_____________________Selection Table
MAX1480ACPI
MAX1480AEPI
Data rate for “A” parts is up to 2.5Mbps. Data rate for “B” and
MAX1480A
MAX1480B
MAX1480C
MAX1490A
MAX1490B
Pin Configurations continued at end of data sheet.
Next-Generation Device Features
PART
MAX1480E/MAX1490E: ±15kV ESD-Protected,
Isolated RS-485/RS-422 Data Interfaces
MAX3157: High CMRR, RS-485 Transceiver with
±50V Isolation
PART
TOP VIEW
GND1
GND2
V
V
V
V
CC1
CC2
CC3
CC4
SD
RO
D1
D2
FS
DI
DUPLEX
HALF/
FULL
Half
Half
Half
10
11
12
Full
Full
6
1
2
3
4
5
7
8
9
-40°C to +85°C
0°C to +70°C
TEMP RANGE
ISOLATION BARRIER
Data Interface
DIP
(MBPS)
Pin Configurations
DATA
RATE
0.25
0.25
0.25
2.5
2.5
24
23
22
21
20
19
18
17
16
15
14
13
AC1
AC2
ISO V
ISO RO DRV
A
B
ISO COM1
ISO DI DRV
ISO RO LED
Z
Y
ISO V
LIMITED
SLEW-
28 Wide Plastic DIP
28 Wide Plastic DIP
RATE
Yes
Yes
Yes
PIN-PACKAGE
No
No
CC1
CC2
MAX1490A/B
ENABLE
DRIVER
TIME
(µs)
0.2
0.5
35
1

Related parts for MAX1480BEPI+

MAX1480BEPI+ Summary of contents

Page 1

... Transceivers for EMI-Sensitive Applications Industrial-Control Local Area Networks Automatic Test Equipment HVAC/Building Control Networks ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Next-Generation Device Features ♦ ♦ For Integrated ESD Protection MAX1480E/MAX1490E: ± ...

Page 2

Complete, Isolated RS-485/RS-422 Data Interface 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 Respect ...

Page 3

Complete, Isolated RS-485/RS-422 ELECTRICAL CHARACTERISTICS (continued ±10 CC_ FS CC_ A MIN PARAMETER SYMBOL Differential Driver Output (With Load) Change in Magnitude of Differential Output Voltage for Complementary Output States ...

Page 4

Complete, Isolated RS-485/RS-422 Data Interface SWITCHING CHARACTERISTICS—MAX1480A/MAX1490A (continued ±10 CC_ CC_ A MIN PARAMETER SYMBOL | Differential Receiver PLH PHL Skew Maximum Data Rate Time to Shutdown ...

Page 5

Complete, Isolated RS-485/RS-422 SWITCHING CHARACTERISTICS—MAX1480B/MAX1480C/MAX1490B (continued ±10 CC_ CC_ A MIN PARAMETER SYMBOL Driver Disable Time from Low (MAX1480C Only) Driver Disable Time from High (MAX1480C Only) Receiver Input to ...

Page 6

Complete, Isolated RS-485/RS-422 Data Interface __________________________________________Typical Operating Characteristics ( +25°C, unless otherwise noted.) CC_ CC_ A OUTPUT CURRENT vs. RECEIVER OUTPUT LOW VOLTAGE 80 MEASURED AT ISO RO DRV ...

Page 7

Complete, Isolated RS-485/RS-422 _____________________________Typical Operating Characteristics (continued 5V +25°C, unless otherwise noted.) CC_ CC_ A MAX1480A SUPPLY CURRENT vs. TEMPERATURE 160 R = 54Ω 5.5V CC 140 V = ...

Page 8

Complete, Isolated RS-485/RS-422 Data Interface _____________________________Typical Operating Characteristics (continued) ´ 5V ´ = 0V, DE CC_ CC_ DI MAX1480A DRIVER ENABLE TIME 200ns/div ´ 5.0V CC_ ´ DE ...

Page 9

Complete, Isolated RS-485/RS-422 _____________________________Typical Operating Characteristics (continued) ´ 5V CC_ CC_ CC_ DI MAX1480A/MAX1490A RECEIVER t PHL MAX1480/90-21 20ns/div ´ 5.0V CC_ CC_ ´ ...

Page 10

Complete, Isolated RS-485/RS-422 Data Interface ________________________________________________________________Pin Description PIN NAME MAX1480A/B/C MAX1490A/B PINS ON THE NON-ISOLATED SIDE PINS ON THE NON-ISOLATED SIDE CC1 D1 GND1 ...

Page 11

Complete, Isolated RS-485/RS-422 ___________________________________________________Pin Description (continued) PIN NAME MAX1480A/B/C MAX1490A/B PINS ON THE ISOLATED RS-485/RS-422 SIDE (continued) — 17 — 18 — 19 — — ISO — ISO — ISO ...

Page 12

Complete, Isolated RS-485/RS-422 Data Interface V CC3 MAX845 Q OSC T F/F FS 1.07MHz/ 1.45MHz 22μF 0.1μF 74HC86 OR EQUIVALENT R1 DI DRIVER INPUT ´ DRIVER ENABLE ´ ...

Page 13

Complete, Isolated RS-485/RS-422 V CC3 Q OSC T F/F FS 1.07MHz/ 1.45MHz CC1 CC2 22μF 0.1μ GND1 FS SD 74HC86 V CC3 OR EQUIVALENT R1 DI DRIVER INPUT DI ...

Page 14

Complete, Isolated RS-485/RS-422 Data Interface SHUTDOWN Figure 3. MAX1480A Low-Power Shutdown Mode Figure 4. Driver DC Test Load 14 ______________________________________________________________________________________ V CC1 1 V CC2 GND1 ...

Page 15

Complete, Isolated RS-485/RS-422 ____________________________________________________Test Circuits (continued) Figure 6. Driver Timing Test Load V - 0.4V CC_ V - 0.4V 2 CC_ ´ PLH 1 ( (B) ...

Page 16

Complete, Isolated RS-485/RS-422 Data Interface MAX1480B/MAX1480C/MAX1490B: Reduced EMI and Reflections The MAX1480B/MAX1480C/MAX1490B are slew-rate- limited, minimizing EMI and reducing reflections caused by improperly terminated cables. Figure 11 shows both the driver output waveform of a MAX1480A/MAX1490A transmitting a 150kHz signal ...

Page 17

Complete, Isolated RS-485/RS-422 22μF 0.1μF 74HC86 OR EQUIVALENT R1 DI DRIVER INPUT R2 DE DRIVER ENABLE R3 RECEIVER OUTPUT RO Figure 13. Typical Half-Duplex RS-485/RS-422 Network ...

Page 18

Complete, Isolated RS-485/RS-422 Data Interface Driver Output Protection There are two mechanisms to prevent excessive output current and power dissipation caused by faults or by bus contention. A foldback current limit on the output stage provides immediate protection against short ...

Page 19

Complete, Isolated RS-485/RS-422 Connections and components from one side should not be located near those of the other side. • A shield trace connected to the ground on each side of the barrier can help intercept capacitive currents that might ...

Page 20

Complete, Isolated RS-485/RS-422 Data Interface Doubly Isolated RS-485 Repeater The RS-422/RS-485 standard is specified for cable lengths up to 4000 feet. When approaching or exceed- ing the specified maximum cable length, a ground- potential difference of several tens of volts ...

Page 21

... 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 ____________________ 21 © 2005 Maxim Integrated Products ...

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