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參數資料
| 型號： | DS275 |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | Line Driver or Receiver |
| 英文描述： | LINE TRANSCEIVER, PDIP8 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件頁數： | 1/19頁 |
| 文件大小： | 1664K |
| 代理商： | DS275 |
_________________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 1260VRMS (1min) or 1520VRMS (1s). Their iso-
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
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
____________________________Features
o Isolated Data Interface, Guaranteed to 1260VRMS
(1min)
o ±15kV ESD Protection on I/O Pins
o Slew-Rate Limited for Errorless Data
Transmission (MAX1480EC/MAX1490EB)
o High-Speed, Isolated, 2.5Mbps RS-485/RS-422
Interface (MAX1480EA/MAX1490EA)
o Full-Duplex Data Communication
(MAX1490EA/MAX1490EB)
o Single +5V Supply
o Current Limiting and Thermal Shutdown for
Driver Overload Protection
o Standard 0.6in DIP Packages
28-Pin DIP (MAX1480EA/MAX1480EC)
24-Pin DIP (MAX1490EA/MAX1490EB)
MAX1480E/MAX1490E
±15kV ESD-Protected, Isolated RS-485/RS-422
Data Interfaces
________________________________________________________________ Maxim Integrated Products
1
Pin Configurations
1
24
23
22
21
20
19
18
17
2
3
4
5
6
7
8
AC1
AC2
ISO VCC1
ISO RO DRV
D2
D1
A
B
Z
Y
SD
FS
GND1
16
15
14
13
9
10
11
12
ISO COM1
ISO DI DRV
ISO VCC2
ISO RO LED
GND2
RO
DI
DIP
VCC2
VCC3
VCC4
VCC1
MAX1490EA/
MAX1490EB
MAX845E
MAX488E MAX490E
TOP VIEW
ISOLATION BARRIER
19-1940; Rev 0; 4/01
PART
MAX1480EACPI
MAX1480EAEPI
-40°C to +85°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
28 Wide Plastic DIP*
_______________Ordering Information
Ordering Information continued at end of data sheet.
Data rate for A parts is up to 2.5Mbps. Data rate for C parts is
up to 250kbps.
*See Reliability section at end of data sheet.
Pin Configurations continued at end of data sheet.
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.
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