DataSheet26.com

даташит MAX1482 PDF ( Datasheet )

MAX1482 Datasheet Download - Maxim

Номер произв MAX1482
Описание Slew-Rate-Limited RS-485 Transceivers
Производители Maxim
логотип Maxim логотип 



1Page
		

No Preview Available !

MAX1482 Даташит, Описание, Даташиты
19-0367; Rev 1; 5/06
20µA, 18-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
_______________General Description
The MAX1482 and MAX1483 are low-power trans-
ceivers for RS-485 and RS-422 communication. Both
feature slew-rate-limited drivers that minimize EMI and
reduce reflections caused by improperly terminated
cables. Data rates are guaranteed up to 250kbps.
The MAX1482/MAX1483 draw only 20µA of supply cur-
rent. Additionally, they have a low-current shutdown
mode that consumes only 0.1µA. Both parts operate
from a single +5V supply.
Drivers are short-circuit current limited and are protect-
ed against excessive power dissipation by thermal
shutdown circuitry that places the driver outputs into a
high-impedance state. The receiver input has a fail-safe
feature that guarantees a logic-high output if the input
is open circuit.
The MAX1482 is full duplex and the MAX1483 is half
duplex. Both parts have a 18-unit-load input impedance
that guarantees up to 256 transceivers on the bus.
________________________Applications
Low-Power RS-485/RS-422 Networks
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
Large 256-Node LANs
_________Typical Operating Circuits
____________________________Features
Low 20µA Operating Current
Slew-Rate Limited for Reduced EMI and
Reduced Reflections
0.1µA Low-Current Shutdown Mode
Designed for RS-485 and RS-422 Applications
Operate from a Single +5V Supply
-7V to +12V Common-Mode Input Voltage Range
Allows up to 256 Transceivers on the Bus—
Guaranteed (18-unit load)
Current Limiting and Thermal Shutdown for
Driver Overload Protection
Ordering Information
PART
MAX1482CPD
MAX1482CSD
MAX1482EPD
MAX1482ESD
MAX1483CPA
MAX1483CSA
MAX1483CUA
MAX1483EPA
MAX1483ESA
TEMP RANGE PIN-PACKAGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
14 PDIP
14 SO
14 PDIP
14 SO
8 PDIP
8 SO
8 µMAX®
8 PDIP
8 SO
PKG
CODE
P14-3
S14-4
P14-3
S14-4
P8-1
S8-5
U8-1
P8-1
S8-5
_________________Pin Configurations
RO 1
RE 2
DE 3
DI 4
R
D
+5V
8 VCC
7B
Rt
6
A
5 GND
MAX1483
B
Rt
A
DE
DI
D
R RO
RE
NOTE: PIN LABELS Y AND Z ON TIMING, TEST, AND WAVEFORM
DIAGRAMS REFER TO PINS A AND B WHEN DE IS HIGH.
TYPICAL OPERATING CIRCUIT SHOWN WITH DIP/SO PACKAGE.
MAX1482 appears at end of data sheet.
TOP VIEW
RO 1
RE 2
DE 3
DI 4
R
D
DIP/SO
8 VCC
7B
6A
5 GND
B1
VCC 2
RO 3
RE 4
MAX1483
8A
7 GND
6 DI
5 DE
µMAX
MAX1482 appears at end of data sheet.
µMAX is a registered trademark of Maxim Integrated products, Inc.
________________________________________________________________ Maxim Integrated Products 1
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.







No Preview Available !

MAX1482 Даташит, Описание, Даташиты
20µA, 18-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC) ...............................................................7V
Control Input Voltages (RE, DE) .................-0.5V to (VCC + 0.5V)
Driver Input Voltage (DI).............................-0.5V to (VCC + 0.5V)
Driver Output Voltages ..........................................-7.5V to 12.5V
Receiver Input Voltages (A, B) ..............................-7.5V to 12.5V
Receiver Output Voltage (RO)....................-0.5V to (VCC + 0.5V)
Continuous Power Dissipation (TA = +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) .....727mW
14-Pin Plastic DIP (derate 10.00mW/°C above +70°C) .800mW
8-Pin SO (derate 5.88mW/°C above +70°C)..................471mW
14-Pin SO (derate 8.33mW/°C above +70°C)................667mW
8-Pin µMAX (derate 4.10mW/°C above +70°C) .............330mW
Operating Temperature Ranges
MAX148_C_ _ .......................................................0°C to +70°C
MAX148_E_ _.....................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
Differential Driver Output (no load)
Differential Driver Output
(with load)
Change in Magnitude of Driver
Differential Output Voltage for
Complementary Output States
Driver Common-Mode Output
Voltage
Change in Magnitude of Driver
Common-Mode Output Voltage
for Complementary Output States
VOD1
VOD2
VOD
VOC
VOD
R = 50(RS-422), Figure 1
R = 27(RS-485), Figure 1
R = 27or 50, Figure 1
R = 27or 50, Figure 1
R = 27or 50, Figure 1
Three-State (high impedance)
Output Current at Driver
Logic Input High Voltage
Logic Input Low Voltage
Logic Input Current
Input Current
(A, B)
Receiver Differential Threshold
Voltage
Receiver Input Hysteresis
Receiver Output High Voltage
Receiver Output Low Voltage
IOZD
VIH
VIL
IIN1
IIN2
VTH
VTH
VOH
VOL
MAX1482 only,
-7V < VY and VZ < 12V
DE, DI, –R—E–
DE, DI, –R—E–
DE, DI, –R—E–
MAX1482,
DE = 0V, VCC = 0V or 5.25V
MAX1483,
DE = 0V, VCC = 0V or 5.25V
-7V VCM 12V
VCM = 0V
IO = -4mA, VID = 200mV
IO = 4mA, VID = -200mV
VIN = 12V
VIN = -7V
VIN = 12V
VIN = -7V
Three-State (high impedance)
Output Current at Receiver
IOZR 0.4V VO 2.4V
Receiver Input Resistance
RIN -7V VCM 12V
MIN TYP MAX UNITS
5V
25
V
1.5 5
0.2 V
3V
0.2 V
±50 µA
2.0 V
0.8 V
±2 µA
150
-100
200
µA
-150
-0.2 0.2 V
75 mV
3.5 V
0.4 V
±1 µA
96 k
Note 1: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device
ground unless otherwise specified.
2 _______________________________________________________________________________________







No Preview Available !

MAX1482 Даташит, Описание, Даташиты
20µA, 18-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
No-Load Supply Current
MAX1482,
RE = 0V or VCC
ICC
MAX1483,
RE = 0V or VCC
DE = VCC
DE = 0V
DE = VCC
DE = 0V
Supply Current in Shutdown
ISHDN DE = 0V, RE = VCC
Driver Short-Circuit Current
Receiver Short-Circuit Current
IOSD
IOSR
DI = high or low, -7V VO 12V (Note 2)
0V VO VCC
35
±7
TYP
25
20
55
20
0.1
MAX
45
35
85
35
10
250
±95
UNITS
µA
µA
mA
mA
SWITCHING CHARACTERISTICS
(VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
Driver Input to Output
tPLH
tPHL
Figures 3 and 5, RDIFF = 54,
CL1 = CL2 = 100pF
Driver Output Skew to Output
tSKEW Figures 3 and 5, RDIFF = 54, CL1 = CL2 = 100pF
Driver Rise or Fall Time
tR, tF Figures 3 and 5, RDIFF = 54, CL1 = CL2 = 100pF
Driver Enable to Output High
tZH Figures 4 and 6, CL = 100pF, S2 closed
Driver Enable to Output Low
tZL Figures 4 and 6, CL = 100pF, S1 closed
Driver Disable Time from Low
tLZ Figures 4 and 6, CL = 15pF, S1 closed
Driver Disable Time from High
Receiver Input to Output
tHZ Figures 4 and 6, CL = 15pF, S2 closed
tPLH, tPHL Figures 3 and 7, RDIFF = 54, CL1 = CL2 = 100pF
| tPLH - tPHL | Differential
Receiver Skew
tSKD Figures 3 and 7, RDIFF = 54, CL1 = CL2 = 100pF
Receiver Enable to Output Low
tZL Figures 2 and 8, CRL = 15pF, S1 closed
Receiver Enable to Output High tZH Figures 2 and 8, CRL = 15pF, S2 closed
Receiver Disable Time from Low tLZ Figures 2 and 8, CRL = 15pF, S1 closed
Receiver Disable Time from High tHZ Figures 2 and 8, CRL = 15pF, S2 closed
Maximum Data Rate
fMAX
Time to Shutdown
tSHDN (Note 3)
Driver Enable from Shutdown to
Output High
tZH(SHDN)
Figures 4 and 6, CL = 100pF, S2 closed
Driver Enable from Shutdown to
Output Low
tZL(SHDN)
Figures 4 and 6, CL = 100pF, S1 closed
Receiver Enable from Shutdown
to Output High
tZH(SHDN)
Figures 2 and 8, CL = 15pF, S2 closed,
A - B = 2V
Receiver Enable from Shutdown
to Output Low
tZL(SHDN)
Figures 2 and 8, CL = 15pF, S1 closed,
B - A = 2V
MIN
0.25
0.2
0.1
0.3
0.3
0.25
250
50
TYP
160
200
MAX
2
2
800
2
2
2
3.0
3.0
2.25
UNITS
µs
ns
µs
µs
µs
µs
µs
µs
ns
90 ns
90 ns
90 ns
90 ns
kbps
600 ns
2 µs
2 µs
3 µs
3 µs
Note 2: Applies to peak current. See Typical Operating Characteristics.
Note 3: The MAX1482/MAX1483 are put into shutdown by bringing R–—E– high and DE low. If the inputs are in this state for less
than 50ns, the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 600ns, the parts are
guaranteed to have entered shutdown. See Low-Power Shutdown Mode section.
_______________________________________________________________________________________ 3










Всего страниц 14 Pages
Скачать PDF[ MAX1482.PDF Даташит ]

Ссылка Поделиться


Related Datasheets

Номер в каталогеОписаниеПроизводители
MAX148+2.7V to +5.25V / Low-Power / 8-Channel / Serial 10-Bit ADCsMaxim
Maxim
MAX1480Complete / Isolated RS-485/RS-422 Data InterfaceMaxim
Maxim
MAX14800(MAX14800 - MAX14803) High-Voltage Analog SwitchesMaxim Integrated Products
Maxim Integrated Products
MAX14801(MAX14800 - MAX14803) High-Voltage Analog SwitchesMaxim Integrated Products
Maxim Integrated Products

Номер в каталоге Описание Производители
6MBP200RA-060

Intelligent Power Module

Fuji Electric
Fuji Electric
ADF41020

18 GHz Microwave PLL Synthesizer

Analog Devices
Analog Devices
AN-SY6280

Low Loss Power Distribution Switch

Silergy
Silergy

DataSheet26.com    |    2020    |   Контакты    |    Поиск