Rainbow-electronics DDS1693 Manual do Utilizador descarregar pdf (Página 28)

DS1689/DS1693

28 of 32

POWER-UP POWER-DOWN TIMING 5-VOLT OPERATION (t

= 25°C)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

CS High to Power-Fail

0ns

Recovery at Power-up t

REC

150 ms

Slew Rate Power-down t

4.0 £ V

£ 4.5V

300

Slew Rate Power-down t

3.0 £ V

£ 4.0V

Slew Rate Power-up t

4.5V ³ V

³ 4.0V

Expected Data Retention t

10 years 13, 14

POWER-UP POWER-DOWN TIMING 3-VOLT OPERATION (t

= 25°C)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

CS High to Power-Fail

0ns

Recovery at Power-up t

REC

150 ms

Slew Rate Power-down t

2.5 £ V

£ 3.0V

300

Slew Rate Power-up t

3.0V ³ V

³ 2.5V

Expected Data Retention t

10 years 13, 14

WARNING:

Under no circumstances are negative undershoots, of any amplitude, allowed when device is in battery

back-up mode.

CAPACITANCE (t

= 25°C)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Input Capacitance C

12 pF

Output Capacitance C

OUT

12 pF

WAKE-UP/KICKSTART TIMING (t

= 25°C)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Kickstart Input Pulse Width t

KSPW

Wake-up/Kickstart Power-on Timeout t

POTO

2 seconds 10

1 2 ... 23 24 25 26 27 28 29 30 31 32

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