STHS4257A1M6F STMicroelectronics, STHS4257A1M6F Datasheet
STHS4257A1M6F
Specifications of STHS4257A1M6F
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STHS4257A1M6F Summary of contents
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Features ■ IEEE 802.3af-compliant interface for Powered Devices (PDs) ■ Integrated 100V, 450mA power MOSFET low side switch ■ Inrush current limit ■ Normal operation current limit ■ Integrated 25k signature resistor ■ Signature ...
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Contents 1 Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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List of tables Table 1. Device options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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List of figures Figure 1. Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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... RJ-45 socket can routinely see high peak voltages in excess IN of 100V strongly recommended that board designers protect the PD device with a transient voltage suppressor, such as the SMAJ58A (available from STMicroelectronics), connected between the GND and V The IEEE802.3af-compliant interface includes the basic PD detection and Classification functions, whereas the ‘ ...
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Figure 1. Logic diagram SIGDISA R CLASS 1. STHS4257A1 and STHS4257L1 devices only. Table 2. Signal names Pin STHS4257A/L STHS4257A1/ — Figure 2. Pin ...
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Pin descriptions 1.1.1 Classification (R This is the Classification pin. Connect a Classification resistor between this pin and V tell the PSE which power class will be connected. Leave it open for Class 0. Note: Do not connect this ...
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Figure 4. Application circuit overview RJ-45 TX Data to Ethernet Physical Layer Device Pair 2x DF01S Spare Pair Spare Pair RX Data to Ethernet Physical Layer Device Pair 1. STHS4257A1 and STHS4257L1 devices only. To disable signature, tie this pin ...
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Figure 5. Block diagram (STHS4257A/ ref 2 R CLASS 3 NC Control Circuits ref Figure 6. Typical application circuit (STHS4257A/L) with a DC/DC converter ~ + C1 48V from Diode power sourcing Bridge ...
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Figure 7. Block diagram (STHS4257A1/L1 CLASS Ref LIMIT HIGH 2. Ref LIMIT LOW Figure 8. Typical application circuit (STHS4257A1/L1) with a DC/DC converter 48V from ...
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... These are stress ratings only and operation of the device at these or any other conditions above those indicated in the Operating sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant quality documents. Table 4. ...
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Electrical parameters Over the full operating temperature range, unless otherwise noted. Specifications common for both STHS4257x (=STHS4257A, STHS4257L) and STHS4257x1 (=STHS4257A1, STHS4257L1) product families unless otherwise noted. Table 5. Electrical parameters Symbol Parameter Maximum Operating Voltage Signature Range Classification ...
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Table 5. Electrical parameters (continued) Symbol Parameter Input Current Limit, Low Level, STHS4257x1 I LIMIT LOW (inrush mode) I Input Current Limit, STHS4257x V LIMIT Overtemperature Input Current I LIMIT WARM Limit, STHS4257x Overtemperature Trip T OVERTEMP Temperature, STHS4257x Thermal ...
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Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK packages. These packages have a Lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner ...
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Figure 10. DFN8 – 8-lead dual flat no-lead outline, package mechanical drawing Seating Plane C 1. Drawing is not to scale. Table 7. DFN8 – 8-lead dual flat no-lead outline, package mechanical data mm Symb Typ Min A 0.90 0.80 ...
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Part numbering Table 8. Ordering information scheme Example: Device type STHS Product options 4257A 4257A1 4257L 4257L1 Package M = SO8 (150mils width) ( DFN8 (3mm x 3mm) Temperature range 6 = –40 to 85°C Shipping method ...
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Revision history Table 9. Document revision history Date Revision 12-Jul-2006 19-Dec-2006 24-May-2007 26-Jul-2007 1 Initial release. 2 Updated Features and Table 3 Formatting changes and updatedTable Document status upgraded to full datasheet, updated cover page 4 and Table 8. ...
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... Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...