AM4372 datasheet(103/266 Pages) TI1

103 / 266 page

overshoot

undershoot

period

Overshoot = 20% of nominal

IO supply voltage

Undershoot = 20% of nominal

IO supply voltage

103

AM4376, AM4377, AM4378, AM4379

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SPRS851C – JUNE 2014 – REVISED APRIL 2016

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Specifications

Absolute Maximum Ratings (continued)

over junction temperature range (unless otherwise noted)(1)(2)

(3) This supply is sourced from an internal LDO when RTC_KALDO_ENn is low. If RTC_KALDO_ENn is high, this supply must be sourced

from an external power supply.

(4) This terminal is connected to a fail-safe IO and does not have a dependence on any IO supply voltage.

(5) This parameter applies to all IO terminals which are not fail-safe and the requirement applies to all values of IO supply voltage. For

example, if the voltage applied to a specific IO supply is 0 volts the valid input voltage range for any IO powered by that supply will be

–0.5 to +0.3 volts. Special attention should be applied anytime peripheral devices are not powered from the same power sources used

to power the respective IO supply. It is important the attached peripheral never sources a voltage outside the valid input voltage range,

including power supply ramp-up and ramp-down sequences.

(6) This terminal is connected to analog circuits in the respective USB PHY. The circuit sources a known current while measuring the

voltage to determine if the terminal is connected to VSSA_USB with a resistance less than 10

Ω or greater than 100 kΩ. The terminal

should be connected to ground for USB host operation or open-circuit for USB peripheral operation, and should never be connected to

any external voltage source.

(7) For current pulse injection:

Pins stressed per JEDEC JESD78D (Class II) and passed with specified I/O pin injection current and clamp voltage of 1.5 times

maximum recommended I/O voltage and negative 0.5 times maximum recommended I/O voltage.

For overvoltage performance:

Supplies stressed per JEDEC JESD78D (Class II) and passed specified voltage injection.

(8) For tape and reel the storage temperature range is [–10°C; +50°C] with a maximum relative humidity of 70%. TI recommends returning

to ambient room temperature before usage.

Fail-safe IO terminals are designed such they do not have dependencies on the respective IO power

supply voltage. This allows external voltage sources to be connected to these IO terminals when the

respective IO power supplies are turned off. The USB0_VBUS, USB1_VBUS, and DDR_RESETn are the

only fail-safe IO terminals. All other IO terminals are not fail-safe and the voltage applied to them should

be limited to the value defined by the Steady State Max. Voltage at all IO pins parameter in Section 5.1.

Figure 5-1. Tovershoot + Tundershoot < 20% of Tperiod

AM4372 Datasheet(PDF) 103 Page - Texas Instruments

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