LTC1685是52Mbps、精准延迟、RS485 故障保险收发器

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LTC1685 - LTC1685是52Mbps、精准延迟、RS485 故障保险收发器

LTC1685是Linear公司的一款RS485 / RS422 收发器产品，LTC1685是52Mbps、精准延迟、RS485 故障保险收发器，本站介绍了LTC1685的封装应用图解、特点和优点、功能等，并给出了与LTC1685相关的凌力尔特元器件型号供参考。

LTC1685 - 52Mbps、精准延迟、RS485 故障保险收发器

LTC1685 - 52Mbps、精准延迟、RS485 故障保险收发器 - Linear Technology（凌力尔特）

功能描述

The LTC1685 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.

特点

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

以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）

器件型号	封装	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