STHS2377AM6E

Manufacturer Part NumberSTHS2377AM6E
DescriptionHot Swap & Power Distribution IEEE 802.3af PD Interface
ManufacturerSTMicroelectronics
STHS2377AM6E datasheet
 


Specifications of STHS2377AM6E

ProductControllers & SwitchesLead Free Status / Rohs StatusLead free / RoHS Compliant
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STHS2375A, STHS2375L, STHS2376A,
STHS2376L, STHS2377A, STHS2377L
IEEE 802.3af PoE Powered Device (PD) interface controller
Features
IEEE 802.3af-compliant interface for Powered
Devices (PDs)
Integrated 100V, 500mA power MOSFET
Resistor-programmable inrush current limit
Normal operation current limit 460mA
External 25k signature resistor
Resistor-programmable classification current
(Class 0-4)
Power Good output (active-high), open drain
Undervoltage Lockout (UVLO) - standard,
programmable, and legacy (see
Thermal overload protection
Latch (L) or auto-retry (A) after hard current
overload or repetitive thermal overload
Industrial temperature range: –40 to +85°C
8-pin SO and 8-pin TSSOP packages
RoHS compliant
Table 1.
Device options
External
Order code
signature
resistor (1%)
STHS2375A
24.9k
STHS2375L
24.9k
STHS2376A
24.9k
STHS2376L
24.9k
STHS2377A
24.9k
STHS2377L
24.9k
July 2007
Applications
Voice over IP (VOIP) phones
Table
1)
Web cameras
WLAN access points
Internet appliances
POS terminals
RFID readers
UVLO
UVLO
threshold,
rising (V)
Standard
39.3
Standard
39.3
Programmable
2.49
Programmable
2.49
Legacy
35.1
Legacy
35.1
Rev 4
8
1
SO8 (M)
TSSOP8 (DW)
UVLO
Protection
threshold,
mode
falling (V)
30.5
Auto
30.5
Latch
1.93
Auto
1.93
Latch
30.5
Auto
30.5
Latch
1/20
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STHS2377AM6E Summary of contents

  • Page 1

    STHS2375A, STHS2375L, STHS2376A, STHS2376L, STHS2377A, STHS2377L IEEE 802.3af PoE Powered Device (PD) interface controller Features ■ IEEE 802.3af-compliant interface for Powered Devices (PDs) ■ Integrated 100V, 500mA power MOSFET ■ Resistor-programmable inrush current limit ■ Normal operation current limit 460mA ...

  • Page 2

    Contents 1 Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • Page 3

    List of figures Figure 1. Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • Page 4

    List of tables Table 1. Device options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • Page 5

    ... RJ-45 socket can routinely see high peak voltages in excess SS 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 V The IEEE802.3af-compliant interface includes the basic PD Detection and Classification functions, whereas the 'Hot Swap' functions include other basic features, such as Inrush Current Limiting, Undervoltage Lockout (UVLO), and Thermal Overload Protection ...

  • Page 6

    Figure 1. Logic diagram 1. STHS2376A/L devices only. Table 2. Signal names Pin Symbol 1 I LIM 2 CLASS 3 DET RTN UVLO STHS2376A/L devices only, for other part ...

  • Page 7

    Pin descriptions 1.1.1 Current limit (I Connect a resistor between 000/R LIM ILIM R = 178k for inrush current of 140mA for compatibility with legacy PSEs. Do not leave ILIM open or connect to V ...

  • Page 8

    Table 3. IEEE802.3af PD power classes and corresponding R Class Usage 0 Default 1 Optional 2 Optional 3 Optional 4 Reserved 1. Class 4 is currently reserved and should not be used. Figure 4. Application circuit overview (STHS2375A/L, STHS2377A/L) RJ-45 ...

  • Page 9

    Figure 5. STHS237xA block diagram + 12V – Classification Comparator 22V + – & 10V Inrush R 2.5V + – UVLO (1) 7 Current 2.5V + – I LIM ...

  • Page 10

    Figure 6. STHS237xL block diagram (1) UVLO 7 2. LIM STHS2376A/L devices only. The UVLO comparator is connected directly to the UVLO input pin instead of the internal UVLO divider. For ...

  • Page 11

    ... 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. Over the full operating temperature range, unless otherwise noted. Voltages are referenced to the V pin ...

  • Page 12

    Electrical parameters STHS237xA, STHS237xL Specifications common for all the STHS237xA/L product family unless otherwise noted 48V 24. DET otherwise noted, typical values at 25°C. For the STHS2376x V and ...

  • Page 13

    Table 6. DC characteristics Symbol Parameter Detection Offset current Sleep current I DET pin leakage current V IL(DET) I Detection current DET Classification I Classification current CLASS Classification lower V CL(ON) threshold Classification upper V CU(OFF) threshold V CU(H) CLASS ...

  • Page 14

    Table 6. DC characteristics (continued) Symbol Parameter PG deglitch V Output low voltage PG(OL pin leakage current OL(PG) Undervoltage lockout (UVLO) V UVLO(R) UVLO Thresholds, V UVLO(F) STHS2375x V UVLO(H) V UVL(R) UVLO Thresholds, V UVLO(F) STHS2376x V ...

  • Page 15

    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 ...

  • Page 16

    Figure 7. SO8 – 8-lead plastic small outline, 150 mils width, package outline A2 B Note: Drawing is not to scale. Table 7. SO8 – 8-lead plastic small outline, 150 mils width, package mechanical data Symb Typ ...

  • Page 17

    Figure 8. TSSOP8 – 8-lead, thin shrink small outline, 3x4.4mm, package outline A CP Note: Drawing is not to scale. Table 8. TSSOP8 – 8-lead, thin shrink small outline, 3x4.4mm, package mechanical data Symb Typ 1.000 b ...

  • Page 18

    Part numbering Table 9. Ordering information scheme Example: Device type STHS Product options 2375A = Standard UVLO, Auto 2375L = Standard UVLO, Latch 2376A = Programmable UVLO, Auto 2376L = Programmable UVLO, Latch 2377A = Legacy UVLO, Auto 2377L ...

  • Page 19

    Revision history Table 10. Document revision history Date 11-Aug-2006 19-Dec-2006 24-May-2007 26-Jul-2007 Revision 1 Initial release. 2 Updated Features and 3 Formatting changes, updated Document status upgraded to full datasheet, updated cover 4 page and Table 9. Changes Table ...

  • Page 20

    ... 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. ...