Rainbow Electronics DDS1693 - Manual (Page 28)

DS1689/DS1693
28 of 32
POWER-UP POWER-DOWN TIMING 5-VOLT OPERATION (t
A
= 25 °C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
CS High to Power-Fail
t
PF
0 ns
Recovery at Power-up t
REC
150 ms
V
CC
Slew Rate Power-down t
F
4.0 £ V
CC
£ 4.5V
300 ms
V
CC
Slew Rate Power-down t
FB
3.0 £ V
CC
£ 4.0V
10 ms
V
CC
Slew Rate Power-up t
R
4.5V ³ V
CC
³ 4.0V
0 ms
Expected Data Retention t
DR
10 years 13, 14
POWER-UP POWER-DOWN TIMING 3-VOLT OPERATION (t
A
= 25 °C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
CS High to Power-Fail
t
PF
0 ns
Recovery at Power-up t
REC
150 ms
V
CC
Slew Rate Power-down t
F
2.5 £ V
CC
£ 3.0V
300 ms
V
CC
Slew Rate Power-up t
R
3.0V ³ V
CC
³ 2.5V
0 ms
Expected Data Retention t
DR
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
A
= 25 °C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Input Capacitance C
IN
12 pF
Output Capacitance C
OUT
12 pF
WAKE-UP/KICKSTART TIMING (t
A
= 25 °C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Kickstart Input Pulse Width t
KSPW
2 ms
Wake-up/Kickstart Power-on Timeout t
POTO
2 seconds 10