LTC1686 52Mbps Precision Delay RS485 Fail-Safe Transceivers
The LTC™1686/LTC1687 are high speed, precision delay, full-duplex RS485 transceivers that can operate at data rates as high as 52Mbps. The devices also meet 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 LTC1686/LTC1687 RS485 transceivers guarantee receiver fail-safe operation over the entire common mode range (�7V to 12V). Receiver input resistance remains �22k when the device is unpowered or disabled. The LTC1686/LTC1687 operate from a single 5V supply and draw 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/tPLH Skew: Receiver/Driver: 500ps Typ
- �7V to 12V RS485 Input Common Mode Range
- Guaranteed Fail-Safe Operation Over the Entire Common Mode Range
- High 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 LTC490/LTC491
- 45dB CMRR at 26MHz
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应用
- High Speed RS485/RS422 Full Duplex Transceivers
- Level Translator
- Backplane Transceiver
- STS-1/OC-1 Data Transceiver
- Signal Repeaters
典型应用图
参数
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LTC1686 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) * |
| LTC1686CS8 |
SO |
8 |
C |
$5.15 |
$4.20 |
| LTC1686CS8#PBF |
SO |
8 |
C |
$5.15 |
$4.20 |
| LTC1686CS8#TR |
SO |
8 |
C |
|
$4.26 |
| LTC1686CS8#TRPBF |
SO |
8 |
C |
|
$4.26 |
| LTC1686IS8 |
SO |
8 |
I |
$5.50 |
$4.75 |
| LTC1686IS8#PBF |
SO |
8 |
I |
$5.50 |
$4.75 |
| LTC1686IS8#TR |
SO |
8 |
I |
|
$4.81 |
| LTC1686IS8#TRPBF |
SO |
8 |
I |
|
$4.81 |
LTC1686 数据手册及相关资料下载
- 数据手册 (英文) : LTC1686/LTC1687 - 52Mbps Precision Delay RS485 Fail-Safe Transceivers.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
