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參數資料
| 型號： | MAX3157CAI |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 1/13頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX RS485/422 250KBPS 28SSOP |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 46 |
| 類型： | 收發(fā)器 |
| 驅動器/接收器數： | 1/1 |
| 規(guī)程： | RS422，RS485 |
| 電源電壓： | 4.75 V ~ 5.25 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-SSOP（0.209"，5.30mm 寬） |
| 供應商設備封裝： | 28-SSOP |
| 包裝： | 管件 |
General Description
The MAX3157 is a high CMRR RS-485/RS-422 data-com-
munications interface providing ±50V isolation in a
hybrid microcircuit. A single +5V supply on the logic side
powers both sides of the interface, with external ±50V
capacitors transferring power from the logic side to the
isolated side. Each MAX3157 contains one transmitter
and one receiver and is guaranteed to operate at data
rates up to 250kbps. Drivers are short-circuit current lim-
ited and protected against excessive power dissipation
by thermal shutdown circuitry that places the driver out-
puts into a high-impedance state. The receiver input has
a fail-safe feature that guarantees a logic high receiver
output if the inputs are open, shorted, or connected to a
terminated transmission line with all drivers disabled.
The MAX3157 typically draws 25mA of supply current
when unloaded or when fully loaded with the driver dis-
abled. Supply current drops to 25A when the device is
placed in shutdown mode. The device is pin selectable
between half- and full-duplex mode and also features
independently programmable receiver and transmitter
output phase through separate pins. The MAX3157 is a
low-cost replacement for opto-isolated transceivers. For
fully isolated RS-485/RS-422 transceivers, refer to the
MAX1480 family data sheet.
________________________Applications
Industrial Controls
Level Translators
Telecommunications
Local Area Networks
Features
o ±50V Isolated Data Interface
o +5V Single Supply
o Low-Cost Replacement for Opto-Isolated
Transceivers
o True Fail-Safe Receiver While Maintaining
EIA/TIA-485 Compliance
o Pin-Selectable Full/Half-Duplex Operation
o Phase Controls to Correct for Twisted-Pair
Reversal
o 25A Low-Power Shutdown Mode
o Thermal Shutdown for Driver Overload Protection
o 28-Pin SSOP Package
o Slew Rate Limited Reduced EMI
MAX3157
High CMRR RS-485 Transceiver
with ±50V Isolation
________________________________________________________________ Maxim Integrated Products
1
MAX3157
C1HI C2LO C2HI
C1LO
TXP
RXP
DE
DI
RE
RO
GND
A
B
Y
Z
YR
ZR
AR
BR
MICRO
RT = 100
VCC
0.1
F
C3
1
F
C4
10nF
C1
0.047
F
C2
0.047
F
±50V
GND OFFSET
ISOCOM
RG
REMOTE GND
REMOTE
MICRO
RS-485
NODE
VCC
H/F
ISOVCC
Typical Operating Circuit
19-1778; Rev 3; 11/01
Ordering Information
Pin Configurations appear at end of data sheet.
PART
TEMP. RANGE
PIN-PACKAGE
MAX3157CAI
0
°C to +70°C
28 SSOP
MAX3157EAI
-40
°C to +85°C
28 SSOP
MAX3157CPI
0
°C to +70°C
28 PDIP
MAX3157EPI
-40
°C to +85°C
28 PDIP
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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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX3157CAI+ | 功能描述:RS-422/RS-485 接口 IC High CMRR RS-485 Tcvr w/+-50V Iso RoHS:否 制造商:Maxim Integrated 數據速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| MAX3157CAI+T | 功能描述:RS-422/RS-485 接口 IC High CMRR RS-485 Tcvr w/+-50V Iso RoHS:否 制造商:Maxim Integrated 數據速率:1136 Kbps 工作電源電壓:3 V to 5.5 V 電源電流:5.9 mA 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| MAX3157CAI-T | 功能描述:RS-485接口IC RoHS:否 制造商:Texas Instruments 數據速率:250 Kbps 工作電源電壓:3.3 V 電源電流:750 uA 工作溫度范圍:- 40 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX3157CPI | 功能描述:RS-485接口IC RoHS:否 制造商:Texas Instruments 數據速率:250 Kbps 工作電源電壓:3.3 V 電源電流:750 uA 工作溫度范圍:- 40 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX3157CPI+ | 功能描述:RS-485接口IC RoHS:否 制造商:Texas Instruments 數據速率:250 Kbps 工作電源電壓:3.3 V 電源電流:750 uA 工作溫度范圍:- 40 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
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