Reset chip

edi · **Posted:** Tue Nov 23, 2004 4:35 pm

Hi all,
which reset chip is a good solution for AT91RM9200?
Because he controller needs a long reset time at startup, the most chips are not possible.

Greetings,
Edi

markk · **Joined:** Tue Nov 23, 2004 11:16 pm **Posts:** 5

Maxim makes reset chips with the required 900+ millisecond reset period.

kRoy · **Posted:** Wed Nov 24, 2004 10:44 am

Edi,

Take a look to the TPS3808Gxx from Texas Instruments. Its POR delay time can be adjusted from 1.25ms to 10s...

kRoy

JohnXia · **Joined:** Thu Nov 25, 2004 7:00 pm **Posts:** 10

Ricoh R3112x has adjustable delay with a external capacitor.

JohnXia · **Joined:** Thu Nov 25, 2004 7:00 pm **Posts:** 10

Maxim's reset IC is good, it requires no extra componets. However, it's delay time is min 1.12 typ 1.6 and max 2.24. Will it be too long sometimes?

markk · **Joined:** Tue Nov 23, 2004 11:16 pm **Posts:** 5

John,

Too long of a reset time is not a system problem. It can be seen when the application powers up and initializes, but for us this is not a problem. MAX6417 has an external capacitor also for programming the reset period. One word of caution, Maxim has lead times for devices in the 16+ week range.

Reset chip

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