LTC1519 High Speed, Precision Delay RS485 Quad Line Receivers

The LTC™1518/LTC1519 are high speed, precision delay differential quad bus/line receivers that can operate at data rates as high as 52Mbps. They are pin compatible with the LTC488/LTC489 RS485 line receivers and operate over the entire �7V to 12V common mode range. A unique architecture provides very stable propagation delays and low skew over wide input common mode, input overdrive and ambient temperature ranges. Propagation delay is 18.5ns �3.5ns over the commercial temperature range. Typical tPLH/tPHL and channel-to-channel skew is 500ps.

Each receiver translates differential input levels (|VID| >= 300mV) into valid CMOS and TTL output levels. Its high input resistance (>=22k) allows many receivers to be connected to the same driver. The receiver outputs go into a high impedance state when disabled. The receivers have a fail-safe feature that guarantees a high output state when the inputs are shorted or left floating. Other protection features include thermal shutdown and a controlled maximum short-circuit current (50mA Max). Input resistance remains >=22k when the device is unpowered or disabled, thus allowing hot swapping without loading the data lines.

The LTC1518/LTC1519 operate from a single 5V supply and draw 12mA of supply current

产品特点 Features

Precision Propagation Delay: 18.5ns �3.5ns Over 0°C to 70°C Temperature Range
Data Rate: 52Mbps
Low tPLH/tPHL Skew: 500ps Typ
Low Channel-to-Channel Skew: 500ps Typ
-7V to 12V RS485 Input Common Mode Range
Input Resistance >/=22k, Even When Unpowered
Guaranteed Fail-Safe Operation over the Entire Common Mode Range
Hot Swap™ Capable
High Common Mode Rejection to 26MHz
Short-Circuit Protection: 10mA Typ Output Current for an Indefinite Short
Three-State Output Capability
Will Not Oscillate with Slow Moving Input Signals
Single 5V Supply
Pin Compatible with LTC488, LTC489

应用

High Speed RS485/RS422 Receivers
STS-1/OC-1 Data Receivers
PECL Line Receivers
Level Translators
Fast-20/Fast-40 SCSI Receiver

典型应用图

参数

LTC1519 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) *
LTC1519CS	SO	16	C	$6.25	$5.35
LTC1519CS#PBF	SO	16	C	$6.25	$5.35
LTC1519CS#TR	SO	16	C		$5.41
LTC1519CS#TRPBF	SO	16	C		$5.41
LTC1519IS	SO	16	I	$7.75	$5.65
LTC1519IS#PBF	SO	16	I	$7.75	$5.65
LTC1519IS#TR	SO	16	I		$5.71
LTC1519IS#TRPBF	SO	16	I		$5.71

LTC1519 数据手册及相关资料下载

数据手册 (英文) : LTC1518/LTC1519 - High Speed, Precision Delay RS485 Quad Line Receivers.PDF
设计要点 (英文) : DN129 - Precision Receiver Delay Improves Data Transmission.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