AS1860 datasheet(10/51 Pages) ETC2

10 / 51 page

AS1860

Akros Silicon, Inc.

6399 San Ignacio Avenue, Suite 250, San Jose, CA 95119 USA

408.746.9000



http://www.AkrosSilicon.com

INTB /

AT_DET

INTB in Software Mode. The I2C interface interrupts output, active low. The open drain

output allows user defined voltage output high level.

AT_DET in Hardware Mode. It is the PoE+ (802.3at) PSE detect indication output. A

High level output indicates connection to either a Type 2 PSE or to a Local Power

supply. The output is open drain, active High. If a Type 1 PSE is connected, the output

of AT_DET remains in the inactive state (Low).

Secondary Side: Inputs & Outputs

CLK_IN

I, PU

DC coupled clock input for timing of Primary and Secondary DC-DC regulators &

controllers if synchronizing to an external time source is desired. Nominally sourced

from the local Ethernet master clock.

PGOOD

Logical “AND” of global power good & watchdog status.

High = All enabled voltages (#1 with any or all of #2, #3, and #4) are within voltage

spec and there is presently no watchdog timeout. Low = one or more of enabled

voltages out of spec, or, the watchdog has timed out.

Note that PGOOD operation is different for Hardware and Software modes of operation

(selected by the MODE input). For Hardware mode PGOOD operation details see

Mode Power Monitoring (PGOOD). For Software mode PGOOD operation details

see

SW Mode Power Status Monitoring (PGOOD).

WDOG

Watchdog timer input, used for hardware reset of the watchdog timer (if enabled).

Serviced with a transition of either polarity.

Secondary I/O: Miscellaneous

SEC_EN

I, PU

Secondary-side Enable. A capacitor on this input to SGND is required.

I = Input, O = Output, I/O = Bidirectional, PU = Internal pull-up, PD = Internal pull-down, P = Power,

A = Analog, D = Digital, OD = Open drain

AS1860 Datasheet(PDF) 10 Page - List of Unclassifed Manufacturers