LTC4257IS8#PBF PoE Powered Device (PD) by Analog Devices

Status: Production
Series: LTC4257
RoHS: Compliant
Download Datasheet Visit Manufacturer Site View Pricing & Stock

The LTC4257 provides complete signature and power interface functions for a device operating in an IEEE 802.3af Power over Ethernet (PoE) system. The LTC4257 simplifies Powered Device (PD) design by incorporating the 25k signature resistor, the classification current source, input current limit with thermal foldback, undervoltage lockout and power good signaling, all in a single 8-pin package. By incorporating a high voltage power MOSFET onboard, the LTC4257 provides the system designer with reduced cost while also saving board space.The LTC4257 can interface directly with a variety of ADI's DC/DC converter products to provide a cost effective power solution for IP phones, wireless access points and other PDs. Analog Devices also provides solutions for Power Sourcing Equipment (PSE)

Where to Buy

Prices starting from US$2.11

Distributor Stock
Logo for Newark
Newark Electronics
from US$2.37
215
in stock
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Logo for element14 Singapore
element14
from US$2.56
215
in stock
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Logo for Farnell UK
Farnell
from US$2.36
215
in stock
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Logo for Richardson RFPD
Richardson RFPD
from US$2.11
0
in stock
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Ozdisan
from US$5.79
0
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Features

Complete Power Interface Port for IEEE 802.3af® Powered Devices (PDs)
Onboard 100V, 400mA Power MOSFET
Precision Input Current Limit
Onboard 25k Signature Resistor
Programmable Classification Current (Class 0-4)
Undervoltage Lockout
Smart Thermal Protection
Power Good Signal
Available in 8-Pin SO and Low Profile (3mm × 3mm) DFN Packages

Last 6 months Inventory & Pricing History


Alternative Descriptions

Pd Controller, -57V, Nsoic-8 | Newark Electronics
PD CONTROLLER, -57V, NSOIC-8 | element14
Power Over Ethernet PD Controller -57V 13W 8-Pin SOIC N | Richardson RFPD


LTC4257IS8#PBF Semiconductors - ICs by Linear Technology

CONTROLLER POWER/ETHERNET 8SOIC

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Input Voltage -1.5V
Output Current -
UVLO -
Controller IC Case Style SOIC
No. of Pins 8Pins
Duty Cycle (%) -
Frequency -
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)
Base Number 4257
Input Voltage Max -100V
No. of Outputs 1Outputs
Operating Temperature Range -40°C to +85°C
Output Current Max 100mA
Primary Input Voltage -57V
Supply Current 3mA
Termination Type Surface Mount Device

Frequently Asked Questions

Where can I find additional details, specifications and documents for a LTC4257IS8#PBF?

Additional datasheets, footprints and schematics for LTC4257IS8#PBF are listed on our Part Details page. You can also find images and similar parts to LTC4257IS8#PBF on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for LTC4257IS8#PBF on our Product Comparison page. Access via the 'View Pricing & Stock' button to view LTC4257IS8#PBF price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does LTC4257IS8#PBF fall under?

The LTC4257IS8#PBF is listed under PoE Powered Device (PD).

Can I view similar or alternative parts?

You can view similar parts to LTC4257IS8#PBF when available in the PoE Powered Device (PD) range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the LTC4257IS8#PBF you can contact the distributor directly for product support, shipping queries etc.

Is the LTC4257IS8#PBF RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Analog Devices.

Which authorised distributors for LTC4257IS8#PBF have stock available?

Authorised distributors including Newark Electronics, element14, Farnell, Richardson RFPD and Ozdisan have stock available or on a lead time for LTC4257IS8#PBF.

How do I check stock and lead times for all distributors?

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