LTC1685 52Mbps、精准延迟、RS485 故障保险收发器
The LTC®1685 is a high speed, precision delay RS485 transceiver that can operate at data rates as high as 52Mbps. The device also meets the requirements of RS422. A unique architecture provides very stable propagation delays and low skew over a wide common mode and ambient temperature range. The driver and receiver feature three-state outputs, with disabled driver outputs maintaining high impedance over the entire common mode range. A short circuit feature detects shorted outputs and substantially reduces driver output current. A similar feature also protects the receiver output from short circuits. Thermal shutdown circuitry protects from excessive power dissipation. The receiver has a fail-safe feature that guarantees a high output state when the inputs are shorted or are left floating. The LTC1685 RS485 transceiver guarantees receiver fail-safe operation over the entire common mode range (�7V to 12V). Input resistance will remain >/=22k when the device is unpowered or disabled. The LTC1685 operates from a single 5V supply and draws only 7mA of supply current
产品特点 Features
- Precision Propagation Delay Over Temperature: Receiver/Driver: 18.5ns �3.5ns
- High Data Rate: 52Mbps
- Low tPLH/tPHL Skew: Receiver/Driver: 500ps Typ
- -7V to 12V RS485 Input Common Mode Range
- Guaranteed Fail-Safe Receiver Operation Over the Entire Common Mode Range
- High Receiver Input Resistance: >/=22k, Even When Unpowered
- Short-Circuit Protected
- Thermal Shutdown Protected
- Driver Maintains High Impedance in Three-State or with Power Off
- Single 5V Supply
- Pin Compatible with LTC485
- 45dB CMRR at 26MHz
|
应用
- High Speed RS485/RS422 Transceivers
- Level Translator
- Backplane Transceiver
- STS-1/OC-1 Data Transceiver
- Fast-20, Fast-40 SCSI Transceivers
典型应用图
参数
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LTC1685 订购信息和价格参考Package Variations and Pricing
| 器件型号 |
封装 |
引脚 |
温度 |
价格 (以 1 ~ 99 片为批量) |
价格 (以 1000 片为批量) * |
| LTC1685CS8 |
SO |
8 |
C |
$3.40 |
$2.95 |
| LTC1685CS8#PBF |
SO |
8 |
C |
$3.40 |
$2.95 |
| LTC1685CS8#TR |
SO |
8 |
C |
|
$3.01 |
| LTC1685CS8#TRPBF |
SO |
8 |
C |
|
$3.01 |
| LTC1685IS8 |
SO |
8 |
I |
$3.80 |
$3.20 |
| LTC1685IS8#PBF |
SO |
8 |
I |
$3.80 |
$3.20 |
| LTC1685IS8#TR |
SO |
8 |
I |
|
$3.26 |
| LTC1685IS8#TRPBF |
SO |
8 |
I |
|
$3.26 |
LTC1685 数据手册及相关资料下载
- 数据手册 (英文) : LTC1685 - 52Mbps, Precision Delay, RS485 Fail-Safe Transceiver.PDF
- 设计要点 (英文) : DN168 - RS485 Transceivers Operate at 52Mbps Over 100 Feet of Unshielded Twisted Pair.PDF
- 可靠性数据 : R345 Reliability Data .PDF
- 产品选型卡 : Ultra Rugged ±60V RS485 Transceivers.PDF
- 产品选型卡 : RS485 Quick Guide.PDF
