Ac electrical characteristics – Rainbow Electronics MAX6901 User Manual
Page 3
MAX6901
3-Wire Serial RTC in a TDFN
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3
Note 1: All parameters are 100% tested at T
A
= +25°C. Limits over temperature are guaranteed by design and not production tested.
Note 2: I
CC
is specified with the I/O grounded, CS high, SCLK = 2MHz at V
CC
= +5V; SCLK = 500kHz at V
CC
= +2.0V, 32kHz output
enabled, and no load on 32kHz output.
Note 3: Timekeeping current is specified with CS = GND, SCLK = GND, I/O = GND, 32kHz = GND, and 32kHz disabled.
Note 4: All values referred to V
IH
min and V
IL
max levels.
Note 5: Guaranteed by design. Not production tested.
AC ELECTRICAL CHARACTERISTICS
(V
CC
= +2.0V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= +3.3V, T
A
= +25°C.) (Figures 4, 5
and Notes 1, 4)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
OSCILLATOR
X1 to Ground Capacitance (Note 5)
25
pF
X2 to Ground Capacitance (Note 5)
25
pF
3-WIRE SERIAL TIMING
V
CC
= +2V
200
Data to CLK Setup
t
DC
V
CC
= +5V
50
ns
V
CC
= +2V
280
CLK to Data Hold
t
CDH
V
CC
= +5V
70
ns
V
CC
= +2V
800
CLK to Data Delay
t
CDD
C
L
= 50pF
V
CC
= +5V
200
ns
V
CC
= +2V
1000
CLK Low Time
t
CL
V
CC
= +5V
250
ns
V
CC
= +2V
1000
CLK High Time
t
CH
V
CC
= +5V
250
ns
V
CC
= +2V
DC
0.5
CLK Frequency
f
CLK
V
CC
= +5V
DC
2.0
MHz
V
CC
= +2V
2000
CLK Rise and Fall Time
t
R
, t
F
V
CC
= +5V
500
ns
V
CC
= +2V
4
CS to CLK Setup
t
CC
V
CC
= +5V
1
µs
V
CC
= +2V
240
CLK to CS Hold
t
CCH
V
CC
= +5V
60
ns
V
CC
= +2V
4
CS Inactive Time
t
CWH
V
CC
= +5V
1
µs
V
CC
= +2V
0
280
CS to I/O High Z
t
CDZ
R
L
= 1k
Ω, C
L
= 60pF
V
CC
= +5V
0
70
ns
V
CC
= +2V
0
280
SCLK to I/O High Z
t
CCZ
R
L
= 1k
Ω, C
L
= 60pF
V
CC
= +5V
0
70
ns