LTC1688 100Mbps RS485 Hot Swapable Quad Drivers

The LTC®1688/LTC1689 are ultrahigh speed, differential bus/line drivers that can operate at data rates up to 100Mbps. Propagation delay is guaranteed at 8ns ±4ns over the full operating temperature range. These devices operate over the full RS485 common mode range (–7V to 12V), and also meet RS422 requirements.

The driver outputs are Hot Swap capable, maintaining backplane data integrity during board insertion and removal. The drivers feature three-state outputs, maintaining high impedance over the entire common mode range (– 7V to 12V). Outputs also remain high impedance during power-up and with the power off. A short-circuit feature detects bus contention and substantially reduces driver output current. Thermal shutdown circuitry protects the parts from excessive power dissipation.

The LTC1688 allows all four drivers to be enabled together, while the LTC1689 allows two drivers at a time to be enabled.

The LTC1688/LTC1689 operate from a single 5V or 3V supply and draw only 9mA of supply current

产品特点 Features

Ultrahigh Speed:100Mbps
Guaranteed Propagation Delay: 8ns ±4ns Over Temperature
Low Channel-to-Channel Skew: 500ps Typ
Hot Swap™ Capable
50Mbps Operation with VDD = 3V
Low tPLH/tPHL Skew: 500ps Typ
Driver Outputs Maintain High Impedance in Three-State or with Power Off
Short-Circuit Protected: 3mA Typ Output Current for an Indefinite Short
Thermal Shutdown Protected
Single 5V or 3V Supply
Pin Compatible with LTC486/LTC487

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

LTC1688 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) *
LTC1688CS	SO	16	C	$5.80	$4.95
LTC1688CS#PBF	SO	16	C	$5.80	$4.95
LTC1688CS#TR	SO	16	C		$5.01
LTC1688CS#TRPBF	SO	16	C		$5.01
LTC1688IS	SO	16	I	$7.75	$5.65
LTC1688IS#PBF	SO	16	I	$7.75	$5.65
LTC1688IS#TR	SO	16	I		$5.71
LTC1688IS#TRPBF	SO	16	I		$5.71

LTC1688 数据手册及相关资料下载

数据手册 (英文) : LTC1688/LTC1689 - 100Mbps RS485 Hot Swapable Quad Drivers.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 : R410 Reliability Data .PDF
产品选型卡 : Ultra Rugged ±60V RS485 Transceivers.PDF
产品选型卡 : RS485 Quick Guide.PDF