NS
EW DESIG
DED FOR N
T REPLAC
COMMEN
NOT RE
FOR EXAC
0E Series
DATASHEET
EE
EMENT S
Datasheet
ISL3249
ISL31490E, ISL31491E, ISL31492E, ISL31493E, ISL31495E,
ISL31496E, ISL31498E
FN7637
Rev 3.00
May 13, 2015
The ISL31490E, ISL31491E, ISL31492E, ISL31493E,
Features
ISL31495E, ISL31496E, ISL31498E are fault protected, 5V
• Fault protected RS-485 bus pins . . . . . . . . . . . . . . up to ±60V
powered, differential transceivers that exceed the RS-485 and
RS-422 standards for balanced communication. The RS-485
transceiver pins (driver outputs and receiver inputs) are
protected against faults up to ±60V. Additionally, the extended
common mode range allows these transceivers to operate in
environments with common mode voltages up to ±25V (>2x the
RS-485 requirement), making this RS-485 family one of the
most robust on the market.
• Extended common mode range. . . . . . . . . . . . . . . . . . . . ±25V
More than twice the range required for RS-485
• 1/4 unit load for up to 128 devices on the bus
• High transient overvoltage tolerance. . . . . . . . . . . . . . . . ±80V
• Full fail-safe (open, short, terminated) RS-485 receivers
• High Rx I for opto-couplers in isolated designs
OL
Transmitters deliver an exceptional 2.5V (typical) differential
output voltage into the RS-485 specified 54Ω load. This yields
better noise immunity than standard RS-485 ICs, or allows up
to six 120Ω terminations in star network topologies.
• Hot plug circuitry - Tx and Rx outputs remain three-state
during power-up/power-down
• Choice of RS-485 data rates. . . . . . . . . . 250kbps to 15Mbps
• Low quiescent supply current. . . . . . . . . . . . . . . . . . . . 2.3mA
• Ultra low shutdown supply current. . . . . . . . . . . . . . . . . . 10µA
• Pb-free (RoHS compliant)
Receiver (Rx) inputs feature a “Full Fail-safe” design, which
ensures a logic high Rx output if Rx inputs are floating, shorted,
or on a terminated but undriven (idle) bus. Rx outputs have high
drive levels - typically 15mA at V = 1V (for opto-coupled,
OL
isolated applications).
Applications
Half duplex (Rx inputs and Tx outputs multiplexed together)
and full duplex pinouts are available. See Table 1 on page 3 for
key features and configurations by device number.
• Utility meters/automated meter reading systems
• High node count systems
• PROFIBUS™ and field bus networks, and factory automation
• Security camera networks
For fault protected or wide common mode range devices with
cable invert (polarity reversal) please see the ISL32485E
datasheet.
• Building lighting and environmental control systems
• Industrial/process control networks
30
25
VID = ±1V
B
25
A
12
0
20
15
10
-7
-12
5
RO
-20
-25
0
-5
STANDARD RS-485
TRANSCEIVER
CLOSEST
COMPETITOR
ISL3149xE
TIME (20ns/DIV)
FIGURE 1. EXCEPTIONAL Rx OPERATES AT >15Mbps EVEN WITH A
±25V COMMON MODE VOLTAGE
FIGURE 2. ISL3149XE DELIVERS SUPERIOR COMMON MODE
RANGE vs STANDARD RS-485 DEVICES
FN7637 Rev 3.00
May 13, 2015
Page 1 of 26
5秒后页面跳转
AO3401场效应管参数、引脚图、应用原理图
BT131可控硅参数及引脚图、工作原理详解
74LS32芯片参数、引脚图及功能真值表
全球首块英伟达H200交付 黄仁勋“送货上门”
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
