参数资料
型号: LTC1690CS8#TR
厂商: Linear Technology
文件页数: 1/12页
文件大小: 0K
描述: IC TXRX DIFF FAILSAFE LP 8SOIC
标准包装: 2,500
类型: 收发器
驱动器/接收器数: 1/1
规程: RS422,RS485
电源电压: 4.75 V ~ 5.25 V
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 带卷 (TR)
1
LTC1690
Differential Driver and
Receiver Pair with Fail-Safe
Receiver Output
, LTC and LT are registered trademarks of Linear Technology Corporation.
The LTC
1690 is a low power receiver/driver pair that is
compatible with the requirements of RS485 and RS422.
The receiver offers a fail-safe feature that guarantees a
high receiver output state when the inputs are left open,
shorted together or terminated with no signal present. No
external components are required to ensure the high
receiver output state.
Separate driver output and receiver input pins allow full
duplex operation. Excessive power dissipation caused by
bus contention or faults is prevented by a thermal shut-
down circuit which forces the driver outputs into a high
impedance state.
The LTC1690 is fully specified over the commercial and
industrial temperature ranges. The LTC1690 is available in
8-Pin SO, MSOP and PDIP packages.
s
Battery-Powered RS485/RS422 Applications
s
Low Power RS485/RS422 Transceiver
s
Level Translator
s
Line Repeater
120
3
5
6
D1
120
2
8
7
R2
DRIVER
LTC1690
RECEIVER
120
2
7
8
Y1
Z1
B1
A1
A2
B2
Z2
Y2
R1
120
3
6
5
D2
RECEIVER
DRIVER
1690 TA01
s
No Damage or Latchup to
±15kV ESD (Human Body
Model), IEC1000-4-2 Level 4 (
±8kV) Contact and
Level 3 (
±8kV) Air Discharge
s
Guaranteed High Receiver Output State for
Floating, Shorted or Terminated Inputs with No
Signal Present
s
Drives Low Cost Residential Telephone Wires
s
ICC = 600A Max with No Load
s
Single 5V Supply
s
–7V to 12V Common Mode Range Permits
±7V
Ground Difference Between Devices on the Data Line
s
Power-Up/Down Glitch-Free Driver Outputs Permit
Live Insertion or Removal of Transceiver
s
Driver Maintains High Impedance with the Power Off
s
Up to 32 Transceivers on the Bus
s
Pin Compatible with the SN75179 and LTC490
s
Available in SO, MSOP and PDIP Packages
D1
B2
A2
R2
1690 TA01a
APPLICATIO S
U
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
Driving a 1000 Foot STP Cable
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