USB84604 datasheet(41/61 Pages) MICROCHIP

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 2014-2016 Microchip Technology Inc.

DS60001295C-page 41

USB84604

9.2

Operating Conditions**

VBAT Supply Voltage

+3.0 V to +5.5 V

VDDCOREREG Supply Voltage

Note 5

Power Supply Rise Time

Note 6

Ambient Operating Temperature in Still Air (TA)

Note 7

**Proper operation of the device is guaranteed only within the ranges specified in this section.

Note 5: +1.6 V to +2.0 V when VDDCOREREG is connected to an external +1.8 V power supply, +3.0 V to +3.6 V

when VDDCOREREG is connected to VDD33.

Note 6: The power supply rise time requirements vary dependant on the usage of the external reset (RESET_N).

If RESET_N is asserted at power-on, the power supply rise time must be 10 ms or less (tRT(max) = 10 ms).

If RESET_N is not used at power-on (tied high), the power supply rise time must be 1 ms or less (tRT(max)

= 1 ms). Higher voltage supplies must always be at an equal or higher voltage than lower voltage supplies.

Figure 9-1 and Figure 9-2 illustrate the supply rise time requirements.

Note 7: -40 °C to +85 °C for automotive version.

FIGURE 9-1:

SINGLE SUPPLY RISE TIME MODEL

FIGURE 9-2:

DUAL SUPPLY RISE TIME MODEL

t10%

10%

90%

Voltage

tRT

t90%

Time

100%

VBAT

VSS

VBAT

t10%

10%

90%

Voltage

tRT

t90%

Time

100%

VBAT

VSS

VBAT

90%

100%

1.8 V

VDDCOREREG

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