AM6421 datasheet(97/235 Pages) TI

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over operating junction temperature range (unless otherwise noted)

(1)(2)

PARAMETER

MIN

MAX UNIT

Transient overshoot and undershoot at IO pin

20% of IO supply voltage for up to 20%

of the signal period (see Figure 7-1, IO

Transient Voltage Ranges)

0.2 × VDD(6)

Latch-up performance

TBD

TSTG

Storage temperature

-55

+150

°C

(1)

Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings

only, and functional operation of the device at these or any other conditions beyond those indicated under Section 7.4, Recommended

Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2)

All voltage values are with respect to VSS, unless otherwise noted.

(3)

The VMON_VSYS pin provides a way to monitor the system power supply. For more information, see Section 9.3.4, System Power

Supply Monitor Design Guidelines.

(4)

This parameter applies to all IO pins 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

–0.3 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.

(5)

An external resistor divider is required to limit the voltage applied to this device pin. For more information, see Section 9.3.3, USB

Design Guidelines.

(6)

VDD is the voltage on the corresponding power-supply pin(s) for the IO.

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 MCU_I2C0_SCL, MCU_I2C0_SDA, I2C0_SCL, I2C0_SDA,

EXTINTn, VMON_1P8_MCU, VMON_1P8_SOC, VMON_3P3_MCU, VMON_3P3_SOC, and MCU_PORz 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 7.1.

overshoot

undershoot

period

Overshoot = 20% of nominal

IO supply voltage

Undershoot = 20% of nominal

IO supply voltage

Tovershoot + Tundershoot < 20% of Tperiod

Figure 7-1. IO Transient Voltage Ranges

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AM6442, AM6441, AM6421, AM6412, AM6411

SPRSP56C – JANUARY 2021 – REVISED FEBRUARY 2022

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