參數(shù)資料
型號(hào): ISL81387
廠商: Intersil Corporation
英文描述: ±15kV ESD Protected, Dual Protocol (RS-232/RS-485) Transceivers(±15kV ESD保護(hù),雙協(xié)議(RS-232/RS-485)收發(fā)器)
中文描述: ± 15kV的ESD保護(hù),雙協(xié)議(RS-232/RS-485)收發(fā)器(± 15kV的ESD保護(hù),雙協(xié)議(RS-232/RS-485)收發(fā)器)
文件頁數(shù): 1/27頁
文件大?。?/td> 1092K
代理商: ISL81387
1
FN6201.1
ISL81387, ISL41387
±
15kV ESD Protected, Dual Protocol
(RS-232/RS-485) Transceivers
These devices are BiCMOS interface ICs that are user
configured as either a single RS-422/485 differential
transceiver, or as a dual (2 Tx, 2 Rx) RS-232 transceiver.
In RS-232 mode, the on-board charge pump generates
RS-232 compliant
±
5V Tx output levels, from a supply as low
as 4.5V. Four small 0.1
μ
F capacitors are required for the
charge pump. The transceivers are RS-232 compliant, with
the Rx inputs handling up to
±
25V, and the Tx outputs
handling
±
12V.
In RS-485 mode, the transceivers support both the RS-485
and RS-422 differential communication standards. The
RS-485 receiver features "full failsafe" operation, so the Rx
output remains in a high state if the inputs are open or
shorted together. The RS-485 transmitter supports up to
three data rates, two of which are slew rate limited for
problem free communications. The charge pump disables in
RS-485 mode, thereby saving power, minimizing noise, and
eliminating the charge pump capacitors.
Both RS-232/485 modes feature loopback and shutdown
functions. The loopback mode internally connects the Tx
outputs to the corresponding Rx input, which facilitates the
implementation of board level self test functions. The outputs
remain connected to the loads during loopback, so
connection problems (e.g., shorted connectors or cables)
can be detected. The shutdown mode disables the Tx and
Rx outputs, disables the charge pump if in RS-232 mode,
and places the IC in a low current (20
μ
A) mode.
The ISL41387 is a QFN packaged device that offers
additional functionality, including a lower speed and edge
rate option (115kbps) for EMI sensitive designs, or to allow
longer bus lengths. It also features a logic supply voltage pin
(V
L
) that sets the V
OH
level of logic outputs, and the
switching points of logic inputs, to be compatible with
another supply voltage in mixed voltage systems. The QFN's
choice of active high or low Rx enable pins increases design
flexibility, allowing Tx/Rx direction control via a single signal
by connecting DEN and RXEN together.
For a dual port version of these devices, please see the
ISL81334/ISL41334 data sheet.
Features
User Selectable RS-232 or RS-485/422 Interface Port
(Two RS-232 Transceivers or One RS-485/422
Transceiver)
±
15kV (HBM) ESD Protected Bus Pins (RS-232 or
RS-485)
Flow-Through Pinouts Simplify Board Layouts
Pb-Free Plus Anneal Available (RoHS Compliant)
Large (2.7V) Differential V
OUT
for Improved Noise
Immunity in RS-485/422 Networks
Full Failsafe (Open/Short) Rx in RS-485/422 Mode
Loopback Mode Facilitates Board Self Test Functions
User Selectable RS-485 Data Rates . . . . . . . . . . 20Mbps
- Slew Rate Limited. . . . . . . . . . . . . . . . . . . . . . . 460kbps
- Slew Rate Limited (ISL41387 Only) . . . . . . . . . 115kbps
Fast RS-232 Data Rate . . . . . . . . . . . . . . . Up to 650kbps
Low Current Shutdown Mode. . . . . . . . . . . . . . . . . . .35
μ
A
QFN Package Saves Board Space (ISL41387 Only)
Logic Supply Pin (V
L
) Eases Operation in Mixed Supply
Systems (ISL41387 Only)
Applications
Gaming Applications (e.g., Slot machines)
Single Board Computers
Factory Automation
Security Networks
Industrial/Process Control Networks
Level Translators (e.g., RS-232 to RS-422)
Point of Sale Equipment
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
NO. OF
PORTS
PACKAGE OPTIONS
RS-485 DATA
RATE (bps)
RS-232 DATA
RATE (kbps)
V
L
PIN
ACTIVE H or L
Rx ENABLE
LOW POWER
SHUTDOWN
ISL81387
1
20 Ld SOIC, 20 Ld SSOP
20M, 460k
650
NO
H
YES
ISL41387
1
40 Ld QFN (6 x 6mm)
20M, 460k, 115k
650
YES
BOTH
YES
Data Sheet
December 20, 2005
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ISL81387_07 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:【15kV ESD Protected, 5V, Dual Protocol (RS-232/RS-485) Transceivers
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ISL81387IAZ-T7A 功能描述:RS-422/RS-485 接口 IC SINGLE 5V MULTIPROTOCOL TRANS 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
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