LTC1921 - LTC1921是Dual ?48V Supply and Fuse Monitor

LTC1921是LINEAR凌力尔特公司的一款专用产品产品，LTC1921是LTC1921是Dual ?48V Supply and Fuse Monitor，本站介绍了LTC1921的封装应用图解、特点和优点、功能等，并给出了与LTC1921相关的LINEAR元器件型号供参考。

LTC1921 - LTC1921是Dual ?48V Supply and Fuse Monitor - 专用产品 - 信号调理 - 凌力尔特

LTC1921 - Dual ?48V Supply and Fuse Monitor

LTC1921 - Dual ?48V Supply and Fuse Monitor - Linear Technology（凌力尔特）

功能描述

The LTC1921 monitors two independent –48V supplies, including their fuses, and drives up to three optoisolators to indicate status, in accordance with standard backplane specifications. Requiring only three noncritical resistors and optoisolators, the LTC1921 replaces multiple voltage comparators, a voltage reference and several precision resistors.

The monitor features dual supply overvoltage and undervoltage detection circuits. The preset trip thresholds include overvoltage, undervoltage and undervoltage recovery that are guaranteed over temperature and meet or exceed common backplane specifications. Additional built-in circuitry detects the condition of supply fuses. Overvoltage and undervoltage detectors ignore fast supply transients, eliminating false detection. The LTC1921 operates from –10V to –80V with a typical power dissipation of less than 10mW.

The LTC1921 is available in 8-pin MSOP and SOIC packages.

特点

Withstands Transient Voltages Up to 200V/–200V

Requires No Precision External Components

Independently Monitors Two –48V Supplies for

– Undervoltage Faults: –38.5V ±1VMAX– Overvoltage Faults: –70V ±1.5VMAX

Accurately Detects Undervoltage Fault Recovery:–43V ±0.5VMAX

Monitors Two External Fuses

Operates from –10V to –80V

Tolerates DC Faults to –100V

Tolerates Accidental Supply Reversal to 100V

Small Footprint: 8-Lead MSOP Package

Specified from –40°C to 85°C

应用

Telecom Backplanes or Switch Cards

Networking Backplanes or Switch Cards

High Voltage Fuse Monitoring

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)
LTC1921CMS8	MS-8	C	$3.40	$2.50
LTC1921CMS8#PBF	MS-8	C	$3.40	$2.50
LTC1921CMS8#TR	MS-8	C		$2.56
LTC1921CMS8#TRPBF	MS-8	C		$2.56
LTC1921CS8	SO-8	C	$3.75	$2.65
LTC1921CS8#PBF	SO-8	C	$3.75	$2.65
LTC1921CS8#TR	SO-8	C		$2.71
LTC1921CS8#TRPBF	SO-8	C		$2.71
LTC1921IMS8	MS-8	I	$4.20	$3.15
LTC1921IMS8#PBF	MS-8	I	$4.20	$3.15
LTC1921IMS8#TR	MS-8	I		$3.21
LTC1921IMS8#TRPBF	MS-8	I		$3.21
LTC1921IS8	SO-8	I	$4.35	$3.30
LTC1921IS8#PBF	SO-8	I	$4.35	$3.30
LTC1921IS8#TR	SO-8	I		$3.36
LTC1921IS8#TRPBF	SO-8	I		$3.36

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