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Instrumentation Cluster
RTC/Oscillator
Challenges: External to main CPU, lowest current consumption for always-on applications.
DATA SHEETS
Display
Title/Parts
Key Advantages
QV
PDF
Extremely Accurate I²C-Integrated RTC/TCXO/Crystal
DS3231
QV
PDF
EconOscillator™/Divider
DS1077
Programmable, All-Silicon Oscillator Runs Up to 133MHz with No External Components
Key Specifications: Oscillator Modules
Part Number
Freq.
Osc. Type
Tuning Adjustment Type
Freq. Output Type
Frequency Stability
(±ppm/yr)
Frequency Stability
(±ppm/yr)
Frequency Stability
(±ppm/yr)
Frequency Stability
(±ppm)
V
SUPPLY
(V)
0 to +40°C
-40 to 0°C/ +40 to +85°C
vs. V
CC
vs. Aging
DS3231
32.768kHz
TCXO
Digital
CMOS Open-Drain
2
3.5
1 (typ)
5 (0-10 Years)
2.3 to 5.5
3
3.3
5
See All Oscillator Modules (28)
Key Specifications: Timekeeping & Real-Time Clocks
Part Number
Date/ Time Format
Interface
V
SUPPLY
(V)
Time Keeping Current
(nA)
Memory Type
Time of Day Alarms
hh = sec/100
typ
DS3231
YY-MM-DD/ HH:MM:SS
I
2
C
2.3 to 5.5
3
3.3
5
840
None
2
See All Timekeeping & Real-Time Clocks (80)
Key Specifications: Silicon Oscillators
Part Number
f
OUT
(MHz)
f
OUT
(kHz)
Δf
OUT
(%)
User Prog. f
OUT
Spread Spectrum
V
CC
(V)
Reset Out
Package/Pins
Smallest Available Pckg.
(mm
2
)
Oper. Temp.
(°C)
max
min
max
max w/pins
DS1077
66
8.1
+1.25 to -1.65 (0 to 70°C)
I
2
C
No
4.75 to 5.25
No
µMAX/8
SOIC(N)/8
16
-40 to +85
See All Silicon Oscillators (21)
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