MAX6902 Maxim, MAX6902 Datasheet
MAX6902
Manufacturer Part Number
MAX6902
Description
I2C-Compatible RTC in a TDFN
Manufacturer
Maxim
Datasheet
1.MAX6902.pdf
(18 pages)
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MAX6902ETA+T
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The MAX6902 SPI™-compatible real-time clock con-
tains a real-time clock/calendar and 31 x 8 bits of static
random-access memory (SRAM). The real-time
clock/calendar provides seconds, minutes, hours, day,
date, month, year, and century information. A time/date
programmable polled ALARM is included in the
MAX6902. The end-of-the-month date is automatically
adjusted for months with fewer than 31 days, including
corrections for leap year up to the year 2100. The clock
operates in either the 24hr or 12hr format with an
AM/PM indicator. The MAX6902 operates with a supply
voltage of +2V to +5.5V, is available in the ultra-small
8-pin TDFN package, and works over the -40°C to
+85°C industrial temperature range.
19-2134; Rev 1; 7/03
I
Associated Companies, conveys a license under the Philips I
the system conforms to the I
SPI is a trademark of Motorola, Inc.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
2
C is a trademark of Philips Corp. Purchase of I
MAX6900
MAX6901
MAX6902
PART
Point-of-Sale Equipment
Intelligent Instruments
Fax Machines
Battery-Powered Products
Portable Instruments
+3.3V
µc
Typical Operating Circuit
________________________________________________________________ Maxim Integrated Products
1
5
2
3
General Description
I
2
2
SPI compatible
C™ compatible
SCLK
CS
DOUT
DIN
C Standard Specification as defined by Philips.
INTERFACE
SERIAL
3 Wire
MAX6902
+3.3V
6
GND
4
V
CC
0.1µF
Applications
X1
X2
8
7
2
C components of Maxim Integrated Products, Inc., or one of its sublicensed
SPI-Compatible RTC in a TDFN
32.768kHz
CRYSTAL
SRAM
31
31
31
✕
✕
✕
8
8
8
2
C Patent rights to use these components in an I
o Real-Time Clock Counts Seconds, Minutes, Hours,
o Leap-Year Compensation Valid up to Year 2100
o +2V to +5.5V Wide Operating Voltage Range
o SPI Interface: 4MHz at 5V; 1MHz at 2V
o 31 x 8-Bit SRAM for Scratchpad Data Storage
o Uses Standard 32.768kHz, 12.5pF Watch Crystal
o Low Timekeeping Current (400nA at 2V)
o Single-Byte or Multiple-Byte (Burst Mode) Data
o Ultra-Small 8-Pin 3mm x 3mm x 0.8mm TDFN
o Programmable Time/Date Polled ALARM Function
o No External Crystal Bias Resistors or Capacitors
Related Real-Time Clock Products
FUNCTION
MAX6902ETA-T
ALARM
Day of Week, Date of Month, Month, Year, and Century
Transfer for Read or Write of Clock Registers or
SRAM
Package
Required
Polled
Polled
—
TOP VIEW
PART
DOUT
SCLK
GND
DIN
-40°C to +85°C
FREQUENCY
1
2
4
3
OUTPUT
RANGE
Ordering Information
TEMP
32kHz
—
—
MAX6902
TDFN
Pin Configuration
2
C system provided that
PIN-
PACKAGE
8 TDFN
6
8
7
5
X1
X2
V
CS
CC
PACKAGE
Features
6 TDFN
8 TDFN
8 TDFN
PIN-
MARK
TOP
AGT
1
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