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參數(shù)資料
| 型號： | SP338EER1-L |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 1/25頁 |
| 文件大小： | 0K |
| 描述： | IC INTERFACE |
| 標準包裝： | 490 |
| 系列： | * |
| 其它名稱： | 1016-1747 |
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com
SP338E
RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
NOVEMBER 2011
REV. 1.0.0
GENERAL DESCRIPTION
The SP338 is an advanced multiprotocol transceiver
supporting RS-232, RS-485, and RS-422 serial
standards in a 40 pin QFN package. Integrated cable
termination and four configuration modes allow all
three protocols to be used interchangeably over a
single cable or connector with no additional switching
components. Full operation requires only four
external charge pump capacitors.
The RS-485/422 modes feature up to two drivers and
four receivers (2TX/4RX) in half, full, and mixed
duplex configurations. The RS-232 mode (3TX/5RX)
provides full support of all eight signals commonly
used with the DB9 RS-232 connector. A dedicated
diagnostic loopback mode is also provided.
The high speed drivers operate up to 20Mbps in RS-
485/422 modes, and up to 1Mbps in RS-232 mode.
All drivers can be slew limited to 250kbps in any
mode to minimize electromagnetic interference (EMI).
All transmitter outputs and receiver inputs feature
robust electrostatic discharge (ESD) protection to
±15kV Human Body Model (HBM) and ±8kV IEC-
61000-4-2 Contact. Each receiver output has full fail-
safe protection to avoid system lockup, oscillation, or
indeterminate states by defaulting to logic-high output
level when the inputs are open, shorted, or
terminated but undriven. No external biasing resistors
are required.
The RS-232 receiver inputs include a 5k
pull-down
to ground. The RS-485/422 receiver inputs are high
impedance (>96k
when termination is disabled),
allowing
up
to
256
devices
on
a
single
communication bus (1/8th unit load).
The SP338 operates from a single power supply,
either 3.3V or 5V, with low idle current. The shutdown
mode consumes less than 10A for low power
standby operation.
FEATURES
Pin selectable Cable Termination
No external resistors required for RS-485/422
termination and biasing
3.3V or 5V Single Supply Operation
Robust ESD Protection on bus pins
■
±15kV Human Body Model (HBM)
■
±8kV IEC 61000-4-2 (Contact)
Max Data Rate of 20Mbps in RS-485/422 Modes
and up to 1Mbps in RS-232 Modes
Pin selectable 250kbps Slew Limiting
3 Drivers, 5 Receivers RS-232/V.28
2 Drivers, 4 Receivers RS-485/422
■
Full, Half, and Mixed Duplex Configurations
■
1/8th Unit Load, up to 256 receivers on bus
RS-485/422 Enhanced Failsafe for open, shorted,
or terminated but idle inputs
Space saving 6mm x 6mm QFN-40 Package
Pin compatible with SP339E
TYPICAL APPLICATIONS
Dual Protocol Serial Ports (RS-232 or RS-485/422)
Industrial Computers
Industrial and Process Control Equipment
Point-Of-Sale Equipment
Networking Equipment
HVAC Controls Equipment
Building Security and Automation Equipment
ORDERING INFORMATION
PART NUMBER
PACKAGE
OPERATING TEMPERATURE RANGE
DEVICE STATUS
SP338EER1-L
40-pin QFN
-40°C to +85°C
Active
SP338EER1-L/TR
40-pin QFN
-40°C to +85°C
Active
SP338ECR1-L
40-pin QFN
0°C to +70°C
Active
SP338ECR1-L/TR
40-pin QFN
0°C to +70°C
Active
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP339EER1-L | IC TXRX RS232/485 TERM 40QFN |
| SP3483EN-L/TR | IC TXRX RS485 HALF DUPLEX 8NSOIC |
| SP3485EN-L/TR | IC TXRX RS485 HALF DUPLEX 8NSOIC |
| SP3491EN-L | IC TXRX RS485 FULL DUPLX 14NSOIC |
| SP3494CN-L | IC TXRX RS485/RS422 LP 8NSOIC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP338EER1-L/TR | 功能描述:RS-422/RS-485 接口 IC Multiprotocol Transceiver RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| SP339E | 制造商:EXAR 制造商全稱:EXAR 功能描述:RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION |
| SP339ECR1-L | 功能描述:RS-422/RS-485 接口 IC Multiprotocol,20Mbps 3.3/5V Supply RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| SP339ECR1-L/TR | 功能描述:RS-422/RS-485 接口 IC SP339ECR1-L/TR RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)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(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-28 封裝:Tube |
| SP339ECR1-LTR | 制造商:EXAR 制造商全稱:EXAR 功能描述:RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION |
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