Automotive: Body Computer



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Maxim > Solutions > Automotive: Body Computer

Real-Time Clock (RTC)

Challenges: Needs to reliably operate autonomously in rugged environment with large temperature variations. Must be small and have low quiescent current.

DATA SHEETS

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Title/Parts

Key Advantages

QV PDF

Extremely Accurate I²C-Integrated RTC/TCXO/Crystal
DS3231

The DS3231 is the single-most integrated solution for accurate timekeeping in the electronics industry.

QV PDF

I²C Serial Real-Time Clock
DS1337, DS1337C

Industry's Smallest I²C RTC with Two Time-of-Day Alarms

Key Specifications: Oscillator Modules

Part Number

Freq.

Osc. Type

Tuning Adjustment Type

Freq. Output Type

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

3.5

1 (typ)

5 (0-10 Years)

2.3 to 5.5

3.3

See All Oscillator Modules (28)

Key Specifications: Timekeeping & Real-Time Clocks

Part Number

Date/ Time Format

Interface

V_SUPPLY
(V)

Time Keeping Current
(nA)

C_L
(pF)

Memory Type

Time of Day Alarms

hh = sec/100

typ

DS3231

YY-MM-DD/ HH:MM:SS

I²C

2.3 to 5.5

3.3

840

None

DS1337

3.3

425

See All Timekeeping & Real-Time Clocks (80)