DS3231SN# Maxim Integrated Products, DS3231SN# Datasheet
DS3231SN#
Specifications of DS3231SN#
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DS3231SN# Summary of contents
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... RST Output/Pushbutton Reset Debounce Input ♦ Underwriters Laboratories (UL) Recognized CC PART DS3231S# DS3231SN# #Denotes a RoHS-compliant device that may include lead that Applications is exempt under RoHS requirements. The lead finish is JESD97 category e3, and is compatible with both lead-based and lead- free soldering processes. A "#" anywhere on the top mark denotes a RoHS-compliant device ...
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Extremely Accurate I RTC/TCXO/Crystal ABSOLUTE MAXIMUM RATINGS , 32kHz, SCL, SDA, RST, Voltage Range BAT INT/SQW Relative to Ground.............................-0.3V to +6.0V Junction-to-Ambient Thermal Resistance (θ Junction-to-Case Thermal Resistance (θ Operating Temperature Range (noncondensing) .............................................-40°C to ...
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Extremely Accurate I ELECTRICAL CHARACTERISTICS (continued 2.3V to 5.5V Active Supply (see Table 1 3.3V 3.0V, and T = +25°C, unless otherwise noted.) (Notes 2, 3) BAT A PARAMETER SYMBOL Output ...
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Extremely Accurate I RTC/TCXO/Crystal AC ELECTRICAL CHARACTERISTICS ( CC(MIN) CC(MAX) BAT PARAMETER SYMBOL SCL Clock Frequency Bus Free Time Between STOP and START Conditions Hold Time (Repeated) START t HD:STA Condition ...
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Extremely Accurate I RST PF(MAX PF(MIN) t VCCF RST _____________________________________________________________________ 2 C-Integrated RTC/TCXO/Crystal Pushbutton Reset Timing t RST Power-Switch Timing VCCR t REC 5 ...
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Extremely Accurate I RTC/TCXO/Crystal SDA t BUF t LOW SCL t t HD:STA R STOP START NOTE: TIMING IS REFERENCED TO V AND V . IL(MAX) IH(MIN) WARNING: Negative undershoots below -0.3V while the part is in battery-backed mode may ...
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Extremely Accurate +3.3V +25°C, unless otherwise noted STANDBY SUPPLY CURRENT vs. SUPPLY VOLTAGE 150 BSY = 0, SCL = SDA = V 125 RST ACTIVE 100 2.0 2.5 3.0 ...
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Extremely Accurate I RTC/TCXO/Crystal OSCILLATOR AND X1 CAPACITOR ARRAY BAT POWER CONTROL GND SCL INTERFACE AND ADDRESS REGISTER DECODE SDA 8 _____________________________________________________________________ 2 C-Integrated CONTROL LOGIC/ SQUARE-WAVE BUFFER; DIVIDER INT/SQW CONTROL 1Hz TEMPERATURE ...
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Extremely Accurate I PIN NAME 32kHz Output. This open-drain pin requires an external pullup resistor. When enabled, the output operates 1 32kHz on either power supply. It may be left open if not used. DC Power Pin for Primary Power ...
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Extremely Accurate I RTC/TCXO/Crystal The temperature sensor, oscillator, and control logic form the TCXO. The controller reads the output of the on-chip temperature sensor and uses a lookup table to determine the capacitance required, adds the aging correction in AGE ...
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Extremely Accurate I Figure 1. Timekeeping Registers BIT ESS BIT 6 BIT 5 MSB 00h 0 10 Seconds 01h 0 10 Minutes AM/PM 02h 0 12/24 20 Hour 03h 04h 0 0 ...
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Extremely Accurate I RTC/TCXO/Crystal the binary-coded decimal (BCD) format. The DS3231 can be run in either 12-hour or 24-hour mode. Bit 6 of the hours register is defined as the 12- or 24-hour mode select bit. When high, the 12-hour ...
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Extremely Accurate I BIT 7 BIT 6 NAME: BBSQW POR Special-Purpose Registers The DS3231 has two additional registers (control and status) that control the real-time clock, alarms, and square-wave output. Control Register (0Eh) Bit 7: Enable Oscillator (EOSC). ...
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Extremely Accurate I RTC/TCXO/Crystal BIT 7 BIT 6 NAME: OSF 0 POR Status Register (0Fh) Bit 7: Oscillator Stop Flag (OSF). A logic 1 in this bit indicates that the oscillator either is stopped or was stopped for ...
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Extremely Accurate I BIT 7 BIT 6 NAME: Sign Data POR BIT 7 BIT 6 NAME: Data Data POR Temperature Registers (11h–12h) Temperature is represented as a 10-bit code with a res- olution of 0.25°C and ...
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Extremely Accurate I RTC/TCXO/Crystal MSB FIRST SDA SLAVE R/W ADDRESS SCL 1–7 8 IDLE START CONDITION 2 Figure Data Transfer Overview slave by not generating an acknowledge bit on the last byte that has been clocked out ...
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Extremely Accurate I <SLAVE ADDRESS> <R/W> S 1101000 0 <DATA (n)> XXXXXXXX START Sr - REPEATED START A - ACKNOWLEDGE (ACK STOP A - NOT ACKNOWLEDGE (NACK) R/W - READ/WRITE OR DIRECTION BIT ADDRESS Figure ...
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Extremely Accurate I RTC/TCXO/Crystal Handling, PC Board Layout, and Assembly The DS3231 package contains a quartz tuning-fork crystal. Pick-and-place equipment can be used, but precautions should be taken to ensure that excessive shocks are avoided. Ultrasonic cleaning should be avoided ...
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Extremely Accurate I REVISION REVISION NUMBER DATE 0 1/05 Initial release. Changed Digital Temp Sensor Output from ±2°C to ±3°C. Updated Typical Operating Circuit. 1 2/05 Changed T A Updated Block Diagram. Added “UL Recognized” to Features; added lead-free packages ...
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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc ...