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Real-Time Clock. MAX31342 Datasheet

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Real-Time Clock. MAX31342 Datasheet






MAX31342 Clock. Datasheet pdf. Equivalent




MAX31342 Clock. Datasheet pdf. Equivalent





Part

MAX31342

Description

Real-Time Clock



Feature


EVALUATION KIT AVAILABLE Click here for production status of specific part num bers. MAX31342 Low-Current, Real-Time Clock with I2C Interface General Desc ription The MAX31342 low-current, real- time clock (RTC) is a time-keeping devi ce that provides an extremely low timek eeping current, permitting longer life from a power supply. The MAX31342 suppo rts 6pF high-ESR c.
Manufacture

Maxim Integrated

Datasheet
Download MAX31342 Datasheet


Maxim Integrated MAX31342

MAX31342; rystals, which broaden the pool of usabl e crystals for the devices. This device is accessed through an I2C serial inte rface. An integrated power-on reset fun ction ensures deterministic default reg ister status upon power-up. Other featu res include two time-of-day alarms, int errupt outputs, a programmable square-w ave output, and a serial bus timeout me chanism. The clock.


Maxim Integrated MAX31342

/calendar provides seconds, minutes, hou rs, day, date, month, and year informat ion. The date at the end of the month i s automatically adjusted for months wit h fewer than 31 days, including correct ions for leap year. The clock operates in 24-hour mode. The MAX3 .


Maxim Integrated MAX31342

.

Part

MAX31342

Description

Real-Time Clock



Feature


EVALUATION KIT AVAILABLE Click here for production status of specific part num bers. MAX31342 Low-Current, Real-Time Clock with I2C Interface General Desc ription The MAX31342 low-current, real- time clock (RTC) is a time-keeping devi ce that provides an extremely low timek eeping current, permitting longer life from a power supply. The MAX31342 suppo rts 6pF high-ESR c.
Manufacture

Maxim Integrated

Datasheet
Download MAX31342 Datasheet




 MAX31342
EVALUATION KIT AVAILABLE
Click here for production status of specific part numbers.
MAX31342
Low-Current, Real-Time Clock with I2C Interface
General Description
The MAX31342 low-current, real-time clock (RTC) is a
time-keeping device that provides an extremely low time-
keeping current, permitting longer life from a power sup-
ply. The MAX31342 supports 6pF high-ESR crystals,
which broaden the pool of usable crystals for the devices.
This device is accessed through an I2C serial interface.
An integrated power-on reset function ensures determinis-
tic default register status upon power-up.
Other features include two time-of-day alarms, interrupt
outputs, a programmable square-wave output, and a ser-
ial bus timeout mechanism. The clock/calendar provides
seconds, minutes, hours, day, date, month, and year infor-
mation. The date at the end of the month is automatical-
ly adjusted for months with fewer than 31 days, including
corrections for leap year. The clock operates in 24-hour
mode. The MAX31342 also includes an input for synchro-
nization. When a reference clock (e.g., 32kHz, 50Hz/60Hz
Power Line, GPS 1PPS) is present at the CLKIN pin and
the enable external clock input bit (ECLK) is set to 1,
the MAX31342 RTC is frequency-locked to the external
clock and the clock accuracy is determined by the external
source.
The device is available in lead(Pb)-free/RoHS-compliant,
8-pin wafer-level package (WLP) 1mm x 2mm package
with 0.5mm pitch. The device supports the -40°C to +85°C
extended temperature range.
Applications
● Medical
● Wearables
● Point-of-Sale (POS)
● Telematics
● Portable Instruments
● Portable Audio
● Power Meters
Benefits and Features
● Increases Battery Life
• 150nA Timekeeping Current
• Wide Range of External Crystals with CL = 6pF and
ESR up to 100kΩ for Minimal Current Draw
● Provides Flexible Configurability
• Programmable Square Wave Output for Clock
Monitoring
● Saves Board Space
• Integrated Load Capacitors for Crystal Oscillator
• 1mm x 2mm, 8-Bump WLP with 0.5mm Pitch
● Value Add Features for Ease of Use
• +1.6V to +3.6V Operating Voltage Range
• Countdown Timer with Repeat Function
● Integrated Protection
• Power-On Reset for Default Configuration
• Lockup-Free Operation with Bus Timeout
Ordering Information appears at end of data sheet.
Typical Operating Circuit
VCC
MCU
SDA
SCL
VCC
MAX31342
INTA/CLKIN
INTB/CLKOUT
X1
X2
GND
19-100457; Rev 2; 4/19




 MAX31342
MAX31342
Low-Current, Real-Time Clock with I2C Interface
Absolute Maximum Ratings
Voltage Range on Any Pin Relative to Ground ........ -0.3V to +6V
Operating Temperature Range ............................ -40°C to +85°C
Junction Temperature ...................................................... +150°C
Storage Temperature Range.............................. -55°C to +150°C
Soldering Temperature ............ See the IPC/JEDEC J-STD-020A
Specification
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may
affect device reliability.
Package Information
8 WLP
Package Code
W80D1-1
Outline Number
21-100291
Land Pattern Number
Refer to Application Note 1891
Thermal Resistance, Four-Layer Board:
Junction-to-Ambient (θJA)
Junction-to-Case Thermal Resistance (θJC)
49°C/W
N/A
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages.
Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different
suffix character, but the drawing pertains to the package regardless of RoHS status.
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a
four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/
thermal-tutorial.
www.maximintegrated.com
Maxim Integrated | 2




 MAX31342
MAX31342
Low-Current, Real-Time Clock with I2C Interface
Electrical Characteristics
(VCC = +1.6V to +3.6V, typical values at VCC = +3.0V, unless otherwise noted. Limits are 100% tested at TA = +25°C, unless
otherwise noted. Limits over the operating temperature range, and relevant supply voltage range, are guaranteed by design and
characterization (Note 1).)
PARAMETER
SYMBOL
DC CHARACTERISTICS
Operating Voltage
Range
VCC
Minimum Timekeeping
Voltage
VCCTMIN
Timekeeping Current:
CLKIN = GND or CLKIN
= VCC (Note 3)
Maximum Supply
Voltage Rise Slew Rate
ICCT
TVCCR
Data Retention Current
(Oscillator Stopped and
I2C Inactive)
IBATDR
ESD Protection (All
Pins)
LOGIC INPUTS and OUTPUTS
Logic 1 Input
VIH
Logic 0 Input
Input Leakage (SCL,
CLKIN/INTA)
Output Leakage (CLKIN/
INTA, CLKOUT/INTB)
Output Logic 1 VOH =
+1.0V (CLKOUT/INTB)
Output Logic 0, VOL =
+0.4V (SDA, CLKIN/
INTA, CLKOUT/INTB)
I2C INTERFACE
SCL Clock Frequency
Bus Free Time Between
a STOP and START
Condition
Hold Time (Repeated)
START Condition
Low Period of SCL
Clock
High Period of SCL
Clock
Data Hold Time
VIL
IIL
IO
IOH
IOL
fSCL
tBUF
tHD:STA
tLOW
tHIGH
tHD:DAT
CONDITIONS
Full operation (Note 2)
TA = +25°C (Note 2) (Note 3)
VCC = +1.6V
VCC = +3.0V
TA = +25°C
Human Body Model (HBM)
(Note 2)
(Note 2)
Input clock enabled
Input clock disabled
VCC ≥ 1.6V
VCC ≥ 1.6V
(Note 4) (Note 10)
(Note 5)
(Note 6) (Note 7)
MIN TYP MAX UNITS
1.6 3.6 V
1
130 300
150 330
V
nA
3 V/μs
6 nA
±2.5
kV
0.7 x
VCC
-0.3
-0.1
-1.0
-1.0
2.0
VCC +
0.3
+0.3 x
VCC
+0.1
+1.0
V
V
µA
µA
mA
mA
10 400 kHz
1.3 µs
0.6 µs
1.3 µs
0.6 µs
0 0.9 µs
www.maximintegrated.com
Maxim Integrated | 3



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