MAX6902 查看數據表（PDF） - Maxim Integrated
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MAX6902 Datasheet PDF : 20 Pages
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SPI-Compatible RTC in a TDFN
AC ELECTRICAL CHARACTERISTICS
(VCC = +2.0V to +5.5V, TA = -40°C to +85°C. Typical values are at VCC = +3.3V, TA = +25°C, unless otherwise noted.) (Figure 5,
Notes 1, 4)
PARAMETER
OSCILLATOR
SYMBOL
CONDITIONS
MIN
TYP MAX UNITS
X1 to Ground
Capacitance
25
pF
X2 to Ground
Capacitance
25
pF
SPI SERIAL TIMING
Maximum Input Rise
Time
trIN
DIN, SCLK, CS
2
μs
Maximum Input Fall
Time
tfIN
DIN, SCLK, CS
2
μs
Output Rise Time
Output Fall Time
SCLK Period
SCLK High Time
SCLK Low Time
SCLK Fall to DOUT
Valid
trOUT
tfOUT
tCP
tCH
tCL
tDO
DOUT, CLOAD = 100pF
DOUT, CLOAD = 100pF
VCC = +2V
VCC = +5V
CLOAD = 100pF
10
ns
10
ns
1000
ns
238
100
ns
100
ns
100
ns
DIN to SCLK Setup
Time
tDS
100
ns
DIN to SCLK Hold
Time
tDH
2
ns
SCLK Rise to CS
Rise Hold Time
CS High Pulse Width
CS High to DOUT
High Impedance
tCSH
tCSW
tCSZ
2
ns
200
ns
100
ns
CS to SCLK Setup
Time
tCSS
100
ns
Note 1: All parameters are 100% tested at TA = +25°C. Limits over temperature are guaranteed by design and characterization and
not production tested.
Note 2: ICC is specified with DOUT open, CS = DIN = GND, SCLK = 4MHz at VCC = +5V; SCLK = 1MHz at VCC = +2.0V.
Note 3: Timekeeping current is specified with CS = VCC, SCLK = DIN = GND, DOUT = 100kΩ to GND.
Note 4: All values referred to VIH min and VIL max levels.
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