MAX491ECSD+T

更新时间： 2024-11-05 13:10:35

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替代型号

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MAX491ECSD+T 数据手册

19-0410; Rev 3; 7/96

±1 5 k V ES D-P ro t e c t e d , S le w -Ra t e -Lim it e d ,

Lo w -P o w e r, RS -4 8 5 /RS -4 2 2 Tra n s c e ive rs

35–9/MAX1487E

_______________Ge n e ra l De s c rip t io n

____________________________Fe a t u re s

♦ ESD Protection: ±15kV—Human Body Model

The MAX481E, MAX483E, MAX485E, MAX487E–MAX491E,

and MAX1487E are low-power transceivers for RS-485 and

RS-422 communications in harsh environments. Each driver

output and receiver input is protected against ±15kV electro-

static discharge (ESD) shocks, without latchup. These parts

c onta in one d rive r a nd one re c e ive r. The MAX483E,

MAX487E, MAX488E, and MAX489E feature reduced slew-

rate drivers that minimize EMI and reduce reflections caused

by improperly terminated cables, thus allowing error-free

data transmission up to 250kbps. The driver slew rates of the

MAX481E, MAX485E, MAX490E, MAX491E, and MAX1487E

are not limited, allowing them to transmit up to 2.5Mbps.

♦ Slew-Rate Limited for Error-Free Data

Transmission (MAX483E/487E/488E/489E)

♦ Low Quiescent Current:

120µA (MAX483E/487E/488E/489E)

230µA (MAX1487E)

300µA (MAX481E/485E/490E/491E)

♦ -7V to +12V Common-Mode Input Voltage Range

♦ Three-State Outputs

♦ 30ns Propagation Delays, 5ns Skew

(MAX481E/485E/490E/491E/1487E)

These transceivers draw as little as 120µA supply current

when unloaded or when fully loaded with disabled drivers

(s e e Se le c tion Ta b le ). Ad d itiona lly, the MAX481E,

MAX483E, and MAX487E have a low-current shutdown

mode in which they consume only 0.5µA. All parts operate

from a single +5V supply.

♦ Full-Duplex and Half-Duplex Versions Available

♦ Allows up to 128 Transceivers on the Bus

(MAX487E/MAX1487E)

Drivers are short-circuit current limited, and are protected

against excessive power dissipation by thermal shutdown

circuitry that places their outputs into a high-impedance

state. The receiver input has a fail-safe feature that guaran-

tees a logic-high output if the input is open circuit.

♦ Current Limiting and Thermal Shutdown for

Driver Overload Protection

The MAX487E and MAX1487E feature quarter-unit-load

receiver input impedance, allowing up to 128 transceivers

on the bus. The MAX488E–MAX491E are designed for full-

duplex communications, while the MAX481E, MAX483E,

MAX485E, MAX487E, and MAX1487E are designed for half-

duplex applications. For applications that are not ESD sen-

sitive se e the p in- a nd func tion-c ompa tible MAX481,

MAX483, MAX485, MAX487–MAX491, and MAX1487.

______________Ord e rin g In fo rm a t io n

PART

TEMP. RANGE

0°C to +70°C

PIN-PACKAGE

8 Plastic DIP

8 SO

MAX481ECPA

MAX481ECSA

MAX481EEPA

MAX481EESA

0°C to +70°C

-40°C to +85°C

8 Plastic DIP

8 SO

________________________Ap p lic a t io n s

Low-Power RS-485 Transceivers

Ordering Information continued on last page.

Low-Power RS-422 Transceivers

Level Translators

Transceivers for EMI-Sensitive Applications

Industrial-Control Local Area Networks

______________________________________________________________S e le c t io n Ta b le

RECEIVER/

DRIVER

ENABLE

QUIESCENT

CURRENT

(µA)

NUMBER OF

TRANSMITTERS

ON BUS

PART

NUMBER

HALF/FULL DATA RATE SLEW-RATE LOW-POWER

COUNT

DUPLEX

(Mbps)

LIMITED

SHUTDOWN

MAX481E

MAX483E

MAX485E

MAX487E

MAX488E

MAX489E

MAX490E

MAX491E

MAX1487E

Half

Full

Half

2.5

0.25

2.5

Yes

300

120

300

120

300

230

0.25

2.5

Yes

128

Yes

2.5

Yes

2.5

128

________________________________________________________________ Maxim Integrated Products

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800

12 3 4 5 6 7...16

中文翻译

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MAX491ECSD+T 替代型号

型号	品牌	替代类型	描述	数据表
MAX491ECSD+	MAXIM	完全替代	Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, CMOS, PDSO14, 0.150 INCH, LEAD FREE, MS-012B,
MAX491CSD+T	MAXIM	完全替代	Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, CMOS, PDSO14, 0.150 INCH, SOIC-14

与MAX491ECSD+T相关器件

型号	品牌	获取价格	描述	数据表
MAX491EEPA	MAXIM	获取价格	+15kV ESD-Protected Slew-Rate-Limited Low-Power RS-485/RS-422 Transceivers(122.47 k)
MAX491EEPD	MAXIM	获取价格	【15kV ESD-Protected, Slew-Rate-Limited, Low-P
MAX491EESA	MAXIM	获取价格	+15kV ESD-Protected Slew-Rate-Limited Low-Power RS-485/RS-422 Transceivers(122.47 k)
MAX491EESD	MAXIM	获取价格	【15kV ESD-Protected, Slew-Rate-Limited, Low-P
MAX491EESD+	MAXIM	获取价格	Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, CMOS, PDSO14, 0.150 INCH, LEAD FREE, MS-012B,
MAX491EESD+T	MAXIM	获取价格	Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, CMOS, PDSO14, 0.150 INCH, LEAD FREE, MS-012B,
MAX491EESD-T	MAXIM	获取价格	Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, CMOS, PDSO14, 0.150 INCH, MS-012B, SOIC-14
MAX491EPD	MAXIM	获取价格	Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
MAX491ESD	MAXIM	获取价格	Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
MAX491ESD+	MAXIM	获取价格	Line Transceiver, 1 Func, 1 Driver, 1 Rcvr, CMOS, PDSO14, 0.150 INCH, SOIC-14

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