AM6421 datasheet(121/237 Pages) TI

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7.10.2 Power Supply Sequencing

This section describes power supply sequencing required to ensure proper device operation. The power supply

names described in this section comprise a superset of a family of compatible devices. Some members of this

family will not include a subset of these power supplies and their associated device modules.

Note

All power sequence timing shown is preliminary and under evaluation. Updates will be provided as

details become known during validation testing.

7.10.2.1 Power Supply Slew Rate Requirement

To maintain the safe operating range of the internal ESD protection devices, TI recommends limiting the

maximum slew rate of supplies to be less than 18 mV/µs. For instance, as shown in Figure 7-2, TI recommends

having the supply ramp slew for a 1.8-V supply of more than 100 µs.

Figure 7-2 describes the Power Supply Slew Rate Requirement in the device.

slew rate < 18 mV/ s

slew > (supply value) / (18

)

supply value × 55.6 s/V

mV/ s

Supply value

SPRT740_ELCH_06

Figure 7-2. Power Supply Slew and Slew Rate

7.10.2.2 Power-Up Sequencing

Figure 7-3 describes the device power-up sequencing.

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AM6442, AM6441, AM6421

AM6412, AM6411

SPRSP56 – JANUARY 2021

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Product Folder Links: AM6442 AM6441 AM6421 AM6412 AM6411

AM6421 Datasheet(PDF) 121 Page - Texas Instruments