LTC1921
PRODUCTIONDual –48V Supply and Fuse Monitor
- Part Models
- 8
- 1ku List Price
- Starting From $3.32
Part Details
- 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
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.
Applications
- Telecom Backplanes or Switch Cards
- Networking Backplanes or Switch Cards
- High Voltage Fuse Monitoring
Documentation
Data Sheet 1
Reliability Data 1
User Guide 1
Application Note 1
Design Note 1
Technical Articles 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC1921CMS8#PBF | 8-Lead MSOP | ||
| LTC1921CMS8#TRPBF | 8-Lead MSOP | ||
| LTC1921CS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1921CS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1921IMS8#PBF | 8-Lead MSOP | ||
| LTC1921IMS8#TRPBF | 8-Lead MSOP | ||
| LTC1921IS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1921IS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package |
||
| LTC1921CMS8#PBF | PRODUCTION | |
| LTC1921CMS8#TRPBF | PRODUCTION | |
| LTC1921IMS8#PBF | PRODUCTION | |
| LTC1921IMS8#TRPBF | PRODUCTION | |
|
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC1921CMS8#PBF | PRODUCTION | |
| LTC1921CMS8#TRPBF | PRODUCTION | |
| LTC1921IMS8#PBF | PRODUCTION | |
| LTC1921IMS8#TRPBF | PRODUCTION | |
|
Oct 24, 2024 - 24_0246 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package |
||
| LTC1921CS8#PBF | PRODUCTION | |
| LTC1921CS8#TRPBF | PRODUCTION | |
| LTC1921IS8#PBF | PRODUCTION | |
| LTC1921IS8#TRPBF | PRODUCTION | |
|
Oct 12, 2022 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2) |
||
| LTC1921CS8#PBF | PRODUCTION | |
| LTC1921CS8#TRPBF | PRODUCTION | |
| LTC1921IS8#PBF | PRODUCTION | |
| LTC1921IS8#TRPBF | PRODUCTION | |
|
Jun 16, 2021 - 21_0026 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM |
||
| LTC1921CS8#PBF | PRODUCTION | |
| LTC1921CS8#TRPBF | PRODUCTION | |
| LTC1921IS8#PBF | PRODUCTION | |
| LTC1921IS8#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Dual-Supply Monitors 1 | ||
| LTC2966 | RECOMMENDED FOR NEW DESIGNS | 100V Micropower Dual Voltage Monitor |
Evaluation Kits
LTC1921CMS8 | Dual -48V Suppy and Fuse Monitor
Resources
Latest Discussions
No discussions on ltc1921 yet. Have something to say?
Start a Discussion on EngineerZone®