LTC4257CDD-1#TRPBF
- Mfr.Part #
- LTC4257CDD-1#TRPBF
- Manufacturer
- Analog Devices, Inc.
- Package / Case
- 8-WFDFN Exposed Pad
- Datasheet
- Download
- Description
- IC POE CNTRL 1 CHANNEL 8DFN
- Stock
- 39,213
- In Stock :
- 39,213
Request A Quote(RFQ)
- * Fullname:
- * Company:
- * E-Mail:
- Phone:
- Comment:
- * Quantity:
- Manufacturer :
- Analog Devices, Inc.
- Product Category :
- Power Over Ethernet (PoE) Controllers
- Surface Mount :
- yes
- ECCN Code :
- EAR99
- JESD-30 Code :
- S-PDSO-N8
- Internal Switch(s) :
- yes
- Number of Channels :
- 1
- Number of Functions :
- 1
- Peak Reflow Temperature (Cel) :
- 260
- Length :
- 3mm
- Standards :
- 802.3af (PoE)
- Current - Supply :
- 3mA
- Type :
- Controller (PD)
- Packaging :
- Tape and Reel (TR)
- Auxiliary Sense :
- No
- Package / Case :
- 8-WFDFN Exposed Pad
- Terminal Pitch :
- 0.5mm
- Adjustable Threshold :
- No
- JESD-609 Code :
- e3
- Terminal Position :
- Dual
- Number of Terminations :
- 8
- Factory Lead Time :
- 10 Weeks
- Time@Peak Reflow Temperature-Max (s) :
- 30
- Published :
- 2005
- Moisture Sensitivity Level (MSL) :
- 1 (Unlimited)
- Base Part Number :
- LTC4257
- Power - Max :
- 12.95W
- Height Seated (Max) :
- 0.8mm
- Voltage - Supply :
- 57V Max
- Terminal Finish :
- Matte Tin (Sn)
- Width :
- 3mm
- Additional Feature :
- REQUIRES A NEGATIVE SUPPLY OF 48V
- Operating Temperature :
- 0°C~70°C
- Pin Count :
- 8
- RoHS Status :
- ROHS3 Compliant
- Datasheets
- LTC4257CDD-1#TRPBF

Power Over Ethernet (PoE) Controllers Analog Devices, Inc. LTC4257CDD-1#TRPBF Overview
The Power Over Ethernet (PoE) Controllers Analog Devices, Inc. LTC4257CDD-1#TRPBF is an advanced IC specifically engineered for efficient and reliable PoE applications. This controller facilitates the delivery of power alongside data over Ethernet cables, supporting IEEE 802.3af standards. Designed for a single channel, it integrates seamlessly into network devices, enabling power sourcing equipment (PSE) to safely deliver power to powered devices (PDs) without the need for additional wiring. Its compact 8-DFN package makes it ideal for space-constrained applications, enhancing its utility in modern network environments.
LTC4257CDD-1#TRPBF Features
- Integrated detection, classification, and current limiting functionalities
- Supports IEEE 802.3af compliant PoE applications
- High reliability with thermal overload protection
- Minimal external components required due to internal MOSFET
- Enhanced safety features including under-voltage lockout and over-voltage clamp
- Efficient operation with low power dissipation
LTC4257CDD-1#TRPBF Applications
- Network Cameras: Enables PoE for easy installation and reduced cabling by powering the camera directly through the network cable.
- Wireless Access Points: Facilitates the deployment in locations without convenient power outlets, leveraging PoE for both power and data transmission.
- VoIP Phones: Powers VoIP phones through the Ethernet cable, simplifying infrastructure and reducing installation costs.
- RFID Readers: Enhances deployment flexibility by using PoE to eliminate the need for dedicated power supplies, improving setup simplicity and operational efficiency.
- Networked Lighting Systems: Employs PoE for smart lighting solutions, enabling centralized power management and reducing installation complexity.
You may place an order without registering to Chip IC. We strongly recommend that you log in before purchasing as you can track your order at any time.
RFQ (Request for Quotations)It is recommended to send RFQ to get the latest prices and stock availability about the part.Our sales will reply to your inquiry within 24 hours.
Payment MethodFor your convenience, we accept multiple payment methods in USD, Such as:PayPal, Credit Card, and wire transfer.
IMPORTANT NOTICEYou may place an order without registering to 1. You'll receive an order confirmations by e-mail soon . (Please remember to check the spam box if you didn't hear from us). 2. Since stock availability and prices may change at any time, the sales will reconfirm the order details and update you at soonest time.
Most of our products are shipped via FEDEX,DHL,UPS and SF EXPRESS...
Shipping CostShipping Cost starts at $40, but some countries will exceed $40. For example (South Africa, Brazil, India, Pakistan, Israel, etc.).If customer have shipping account, we can make shipment under customer’s shipping account with freight collect directly.
The basic freight (for package ≤0.5 KG ) depends on the time zones and countries
Once the goods are shipped, estimated delivery time depends on the shipping methods you chose. You can track it by the tracking no.
















