UCS2112 datasheet(8/64 Pages) MICROCHIP

8 / 64 page

UCS2112

DS20005424B-page 8

 2015 Microchip Technology Inc.

FIGURE 1-1:

SMSBus Timing.

Attach / Removal Detection

VBUS Bypass - DC

On Resistance

RON_BYP

—45

—

Ω

Leakage Current

ILEAK_BYP

—

µA

Switch off TA < +85°C (Note 1)

Current Limit

IDET_CHG/

IBUS_BYP

—

700

—

µA

VDD = 5V and VBUS> 4.75V

VBUS Charge Time for

Attachment

tDET_CHARGE

—

800

—

CBUS = 500 µF maximum

Attach/Removal Detection - DC

Attach Detection

Threshold

IDET_QUAL

—

800

—

µA

Programmable 200-1000 µA,

default listed

Primary Removal

Detection Threshold

IREM_QUAL_ACT

—

700

—

µA

Programmable 100-900 µA,

default listed. Active power state

IREM_QUAL_DET

—

800

—

µA

Programmable, default listed.

Detect power state

Attach/Removal Detection - AC

Attach Detection Time

tDET_QUAL

—

100

—

Time from Attach to A_DET#

assert.

Removal Detection Time

tREM_QUAL

—

1000

—

TABLE 1-2:

ELECTRICAL SPECIFICATIONS (CONTINUED)

Electrical Characteristics:

Unless otherwise specified, VDD = 4.5V to 5.5V, VS = 2.9V to 5.5V,

VPULLUP = 3V to 5.5V, TA = -40°C to 105°C. All typical values at VDD = VS = 5V, TA = 27°C.

Characteristic

Symbol

Min.

Typ.

Max.

Unit

Conditions

Note

This parameter is characterized, not 100% tested.

This parameter is ensured by design and not 100% tested.

The current measurement full scale range maximum value is 3.4A. However, the UCS2112 cannot report values above

ILIM (if IBUS_R2MIN  ILIM) or above IBUS_R2MIN (if IBUS_R2MIN > ILIM and ILIM  1.6A).

This parameter is characterized, not 100% production tested.

SMDATA

SMCLK

BUF

S - Start Condition

P - Stop Condition

T HIGH

T LOW

HD:STA

SU:STO

HD:STA

HD:DAT

SU:DAT

SU:STA

FALL

RISE

TABLE 1-3:

TEMPERATURE SPECIFICATIONS

Parameters

Sym.

Min.

Typ.

Max.

Units

Conditions

Temperature Ranges

Operating Temperature Range

-40

—

+105

°C

Storage Temperature Range

-55

—

+150

°C

Thermal Package Resistances - see Table 1-1

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