Rainbow Electronics DS1554 - Manual (Page 15)

DS1554
15 of 20
POWER-UP/DOWN CHARACTERISTICS
(Over the Operating Range; V
CC
=3.3V
±
10%)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
CE or WE at V
IH
, Before
Power-Down
t
PD
0
µ
s
V
CC
Fall Time: V
PF(MAX)
to
V
PF(MIN)
t
F
300
µ
s
V
CC
Rise Time: V
PF(MIN)
to
V
PF(MAX)
t
R
0
µ
s
V
PF
to RST High t
REC
40 200 ms
Expected Data Retention Time
(Oscillator On)
t
DR
10 years 6, 7
POWER-UP/DOWN WAVEFORM TIMING 3.3-VOLT DEVICE Figure 9
CAPACITANCE (T
A
= 25
°
C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Capacitance on all input pins C
IN
7 pF 1
Capacitance on IRQ /FT, RST ,
and DQ pins
C
IO
10 pF 1