Max6902 spi-compatible rtc in a tdfn, Ac electrical characteristics – Rainbow Electronics MAX6902 User Manual
Page 3
MAX6902
SPI-Compatible RTC in a TDFN
_______________________________________________________________________________________
3
AC ELECTRICAL CHARACTERISTICS
(V
CC
= +2.0V to +5.5V, T
A
= -40
°C to +85°C. Typical values are at V
CC
= +3.3V, T
A
= +25
°C, unless otherwise noted.) (Figure 5,
Notes 1, 4)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
OSCILLATOR
X1 to Ground
Capacitance
25
pF
X2 to Ground
Capacitance
25
pF
SPI SERIAL TIMING
Maximum Input Rise
Time
t
rIN
DIN, SCLK,
CS
2
µs
Maximum Input Fall
Time
t
fIN
DIN, SCLK,
CS
2
µs
Output Rise Time
t
rOUT
DOUT, C
LOAD
= 100pF
10
ns
Output Fall Time
t
fOUT
DOUT, C
LOAD
= 100pF
10
ns
V
CC
= +2V
1000
SCLK Period
t
CP
V
CC
= +5V
238
ns
SCLK High Time
t
CH
100
ns
SCLK Low Time
t
CL
100
ns
SCLK Fall to DOUT
Valid
t
DO
C
LOAD
= 100pF
100
ns
DIN to SCLK Setup
Time
t
DS
100
ns
DIN to SCLK Hold
Time
t
DH
2
ns
SCLK Rise to
CS
Rise Hold Time
t
CSH
2
ns
CS High Pulse Width
t
CSW
200
ns
CS High to DOUT
High Impedance
t
CSZ
100
ns
CS to SCLK Setup
Time
t
CSS
100
ns
Note 1: All parameters are 100% tested at T
A
= +25°C. Limits over temperature are guaranteed by design and characterization and
not production tested.
Note 2: I
CC
is specified with DOUT open, CS = DIN = GND, SCLK = 4MHz at V
CC
= +5V; SCLK = 1MHz at V
CC
= +2.0V.
Note 3: Timekeeping current is specified with CS = V
CC
, SCLK = DIN = GND, DOUT = 100k
Ω to GND.
Note 4: All values referred to V
IH
min and V
IL
max levels.