LTC1687是52Mbps Precision Delay RS485 Fail-Safe Transceivers

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LTC1687 - LTC1687是52Mbps Precision Delay RS485 Fail-Safe Transceivers

LTC1687是Linear公司的一款RS485 / RS422 收发器产品，LTC1687是52Mbps Precision Delay RS485 Fail-Safe Transceivers，本站介绍了LTC1687的封装应用图解、特点和优点、功能等，并给出了与LTC1687相关的凌力尔特元器件型号供参考。

LTC1687 - 52Mbps Precision Delay RS485 Fail-Safe Transceivers

LTC1687 - 52Mbps Precision Delay RS485 Fail-Safe Transceivers - Linear Technology（凌力尔特）

功能描述

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.

特点

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

应用

High Speed RS485/RS422 Full Duplex Transceivers

Level Translator

Backplane Transceiver

STS-1/OC-1 Data Transceiver

Signal Repeaters

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)
LTC1687CS	SO-14	C	$5.15	$4.20
LTC1687CS#PBF	SO-14	C	$5.15	$4.20
LTC1687CS#TR	SO-14	C		$4.26
LTC1687CS#TRPBF	SO-14	C		$4.26
LTC1687IS	SO-14	I	$5.50	$4.75
LTC1687IS#PBF	SO-14	I	$5.50	$4.75
LTC1687IS#TR	SO-14	I		$4.81
LTC1687IS#TRPBF	SO-14	I		$4.81