LT1640

RECOMMENDED FOR NEW DESIGNS

Negative Voltage Hot Swap Controller

Part Models: 12
1ku List Price: Starting From $2.69

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Overview

Allows Safe Board Insertion and Removal from a Live –48V Backplane
Operates from –10V to –80V
Programmable Inrush Current
Programmable Electronic Circuit Breaker
Programmable Overvoltage Protection
Programmable Undervoltage Lockout
Power Good Control Output

The LT1640L/LT1640H is an 8-pin, negative voltage Hot Swap^™ controller that allows a board to be safely inserted and removed from a live backplane. Inrush current is limited to a programmable value by controlling the gate voltage of an external N-channel pass transistor. The pass transistor is turned off if the input voltage is less than the programmable undervoltage threshold or greater than the overvoltage threshold. A programmable electronic circuit breaker protects the system against shorts. The PWRGD (LTC1640L) or PWRGD (LTC1640H) signal can be used to directly enable a power module. The LT1640L is designed for modules with a low enable input and the LT1640H for modules with a high enable input.

The LT1640L/LT1640H is available in 8-pin PDIP and SO packages.

Applications

Central Office Switching
–48V Distributed Power Systems
Negative Power Supply Control

Part Models: 12
1ku List Price: Starting From $2.69

Documentation

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
LT1640HCN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1640HCS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1640HCS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1640HIN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1640HIS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1640HIS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1640LCN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1640LCS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1640LCS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1640LIN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1640LIS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1640LIS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 8, 2024 - 24_0234 Migrating Bottom Trace Code Marking to Top Side Laser Marking for PDIP Package
		PCN24_0234_Form Material_Report Marking Comparison
LT1640HCN8#PBF	PRODUCTION
LT1640HIN8#PBF	PRODUCTION
LT1640LCN8#PBF	PRODUCTION
LT1640LIN8#PBF	PRODUCTION
Oct 11, 2022 - 22_0241 Epoxy Change from Henkel 8290 to 8290A for PDIP Package
		PCN22_0241_Form Material_Report Qualification Results Summary
LT1640HCN8#PBF	PRODUCTION
LT1640HIN8#PBF	PRODUCTION
LT1640LCN8#PBF	PRODUCTION
LT1640LIN8#PBF	PRODUCTION
Aug 6, 2022 - 22_0172 Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG]
		PCN22_0172_Form Material_Report Delta Qualification Matrix
LT1640HCN8#PBF	PRODUCTION
LT1640HIN8#PBF	PRODUCTION
LT1640LCN8#PBF	PRODUCTION
LT1640LIN8#PBF	PRODUCTION
Oct 24, 2024 - 24_0246 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package
		PCN24_0246_Form Material_Report Marking Comparison Delta Qualification Matrix
LT1640HCS8#PBF	PRODUCTION
LT1640HCS8#TRPBF	PRODUCTION
LT1640HIS8#PBF	PRODUCTION
LT1640HIS8#TRPBF	PRODUCTION
LT1640LCS8#PBF	PRODUCTION
LT1640LCS8#TRPBF	PRODUCTION
LT1640LIS8#PBF	PRODUCTION
LT1640LIS8#TRPBF	PRODUCTION
Oct 12, 2022 - 22_0254 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2)
		PCN22_0254_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT1640HCS8#PBF	PRODUCTION
LT1640HCS8#TRPBF	PRODUCTION
LT1640HIS8#PBF	PRODUCTION
LT1640HIS8#TRPBF	PRODUCTION
LT1640LCS8#PBF	PRODUCTION
LT1640LCS8#TRPBF	PRODUCTION
LT1640LIS8#PBF	PRODUCTION
LT1640LIS8#TRPBF	PRODUCTION
Jun 11, 2021 - 21_0060 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM
		PCN21_0060_Form Material_Report Delta Qualification Matrix
LT1640HCS8#PBF	PRODUCTION
LT1640HCS8#TRPBF	PRODUCTION
LT1640HIS8#PBF	PRODUCTION
LT1640HIS8#TRPBF	PRODUCTION
LT1640LCS8#PBF	PRODUCTION
LT1640LCS8#TRPBF	PRODUCTION
LT1640LIS8#PBF	PRODUCTION
LT1640LIS8#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

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Hardware Ecosystem

Parts	Product Life Cycle	Description
LT4250		Negative 48V Hot Swap Controller

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LT1640

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