MIC2358 Datasheet, PDF (10/29 Pages) Micrel Semiconductor – IEEE 802.3af Octal Power Sourcing Equipment Controller

Micrel, Inc.
MIC2358YLQ
AC Electrical Characteristics⁽⁴⁾
(48VS – ARTN) = 48V; TA = 25°C, unless otherwise noted. Bold values indicate specifications apply over the full operating
temperature range of 0°C < TA < +70°C, unless otherwise noted.
Symbol Parameter
Condition
Min
Typ Max Units
tDET
Detection Duration
Time to measure PD signature
resistance
100
500
ms
tPDC
Classification Delay Time
Time to classify the PD.
10
19.5
75
ms
tDBO
tED
tPORAM
Detection Backoff Delay Time
Detection delay after error
Power On Delay, Autonomous
Mode
Alternative B configuration ONLY
– From valid detect to Port On in
Autonomous mode
2
2.1
16
s
750 1000 10000 ms
0
39
400
ms
tILIMMAX
Maximum ILIM Duration during – IEEE 802.3af applications
Port Initialization
30
57
75
ms
tICUTMAX
Maximum ICUT Duration during – IEEE 802.3af applications
Steady-state Operation
50
55
75
ms
tMPSDLY
AC / DC MPS disconnect delay
time
300
335
400
ms
/360
tDCMPSPW DC MPS Disconnect minimum
pulse width
See VDCMPSMIN
50
60
ms
SMBus Interface Timing
tSCL
SCL (serial clock) period
t2
SDA Setup Time to SCL High
2.5
µs
100
ns
t3
SDA Hold Time to SCL Low
300
ns
t4
SDA Low Setup Time to SCL
Low
100
ns
t5
SDA High Hold Time to SCL
High
100
ns
tARA-INT
ARA to /SMBINT Pin HIGH
Time
20
300
ns
Notes:
1. GBNT – Guaranteed by design and characterization, not tested in production.
2. Exceeding the absolute maximum rating may damage the device.
3. The device is not guaranteed to function outside its operating rating.
4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
5. Specification for packaged product only.
July 2010
10
M9999-070810