MAX6900ETT+T Maxim Integrated Products, MAX6900ETT+T Datasheet

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MAX6900ETT+T

Manufacturer Part Number
MAX6900ETT+T
Description
Real Time Clock IC RTC I2C COMPAT atible RTC in a TDFN
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX6900ETT+T

Function
Clock, Calendar, Alarm
Rtc Memory Size
31 B
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2 V
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Rtc Bus Interface
Serial
Package / Case
TDFN EP
Time Format
HH:MM:SS
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX6900, I
(RTC) in a 6-pin TDFN package contains a real-time
clock/calendar and 31-byte
dom access memory (SRAM). The real-time clock/cal-
endar provides seconds, minutes, hours, day, date,
month, and year information. 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 for-
mat with an AM/PM indicator.
19-1942; Rev 3; 6/03
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.
SPI is a trademark of Motorola, Inc.
MAX6900
MAX6901
MAX6902
PART
Portable Instruments
Point-of-Sale Equipment
Intelligent Instruments
Battery-Powered Products
TOP VIEW
V
2
________________________________________________________________ Maxim Integrated Products
CC
X1
X2
I
3-wire
SPI™ compatible
C-bus-compatible real-time clock
2
C compatible
1
2
3
SERIAL BUS
General Description
MAX6900
TDFN
Pin Configuration
8-bit wide of static ran-
6 SDA
5 SCL
4
Applications
GND
I
2
SRAM
31
31
31
C-Compatible RTC in a TDFN
8
8
8
♦ Real-Time Clock Counts Seconds, Minutes,
♦ Leap Year Compensation Valid up to Year 2100
♦ Fast (400kHz) I
♦ 31
♦ Uses Standard 32.768kHz, 12.5pF Load, Watch
♦ Ultra-Low 225nA (typ) Timekeeping Current
♦ Single-Byte or Multiple-Byte (Burst Mode) Data
♦ 6-Pin 3mm x 3mm x 0.8mm TDFN Surface-Mount
♦ No External Crystal Bias Resistors or Capacitors
MAX6900ETT-T
Related Real-Time Clock Products
FUNCTION
ALARM
Hours, Date, Month, Day, and Year
2.0V to 5.5V
Crystal
Transfer for Read or Write of Clock Registers or
SRAM
Package
Required
Polled
Polled
PART
8 SRAM for Scratchpad Data Storage
V
μC
CC
Typical Operating Circuit
RPU = t
RPU
-40°C to +85°C
2
TEMP RANGE
V
CC
C-Bus-Compatible Interface from
r
/C
FREQUENCY
bus
Ordering Information
OUTPUT
RPU
32kHz
0.01μF
5
6
SCL
SDA
MAX6900
PIN-
PACKAGE
6 TDFN
GND
V
V
CC
CC
4
1
X1
X2
PIN-PACKAGE
2
3
Features
6 TDFN
8 TDFN
8 TDFN
CRYSTAL
MARK
TOP
AEU
1

Related parts for MAX6900ETT+T

MAX6900ETT+T Summary of contents

Page 1

... CC MAX6900 TDFN ________________________________________________________________ Maxim Integrated Products 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 C-Compatible RTC in a TDFN ♦ Real-Time Clock Counts Seconds, Minutes, Hours, Date, Month, Day, and Year ♦ Leap Year Compensation Valid up to Year 2100 ♦ ...

Page 2

I C-Compatible RTC in a TDFN ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0.3V to +6V CC All Other Pins to GND ................................-0. Input Current All Pins ............................................................................20mA Output Current All Outputs .......................................................................20mA Rate of Rise, V ............................................................100V/µs ...

Page 3

AC ELECTRICAL CHARACTERISTICS (continued +2.0V to +5.5V MIN MAX PARAMETER SYMBOL Hold Time After (Repeated) START Condition (After this t Period, the First Clock Is Generated) Repeated START Condition t Setup ...

Page 4

I C-Compatible RTC in a TDFN (T = +25°C, unless otherwise noted.) A Pin Description PIN NAME FUNCTION 1 V Power Supply 32.768kHz External Crystal 3 X2 32.768kHz External Crystal 4 GND Ground 2 5 SCL ...

Page 5

X1 X2 VCC GND SCL SDA Figure 2. Functional Diagram days, including corrections for leap year up to the year 2100. Crystal Oscillator The MAX6900 uses an external, standard 12.5pF load watch crystal. No other external components are required for ...

Page 6

I C-Compatible RTC in a TDFN SDA SCL MASTER TRANSMITTER/ RECEIVER 2 Figure Bus System Configuration SDA SCL S START CONDITION 2 Figure Bus Start and Stop Conditions SDA SCL 2 Figure 5. ...

Page 7

DATA OUTPUT BY TRANSMITTER DATA OUTPUT BY RECEIVER SCL FROM MASTER S START CONDITION 2 Figure Bus Acknowledge An unlimited number of data bytes between the start and stop conditions can be sent between the transmit- ter ...

Page 8

I C-Compatible RTC in a TDFN Table 1. Register Address Definition FUNCTION CLOCK SEC MIN DATE 1 0 ...

Page 9

Table 1. Register Address Definition (continued) FUNCTION CLOCK RAM RAM RAM RAM BURST Note: POR STATE defines power-on ...

Page 10

I C-Compatible RTC in a TDFN Table 2. Hex Register Address Definition (continued) WRITE ADDRESS/ COMMAND BYTE (HEX ...

Page 11

Table 3. Data Transfer Summary ______________________________________________________________________________________ 2 I C-Compatible RTC in a TDFN 11 ...

Page 12

I C-Compatible RTC in a TDFN of the Burst Read function. The seven timekeeping reg- isters are latched upon the receipt of the Burst Read command. The worst-case error that can occur between the actual time and the read ...

Page 13

RAM burst mode is specified, no data transfer occurs to any of the RAM locations. Burst writes of data greater than 31 bytes could cause erroneous data in the MAX6900. Power-On Reset (POR) The MAX6900 contains an integral POR circuit ...

Page 14

I C-Compatible RTC in a TDFN TEMPERATURE (°C) -50 -40 -30 -20 - -50 -100 -150 -200 -250 TYPICAL TEMPERATURE CHARACTERISITICS (k = -0.035ppm/° +25°C) O Figure 10. Typical ...

Page 15

GUARD RING * ** ** GROUND PLANE VIA CONNECTION Figure 11. Recommended Board Layout ______________________________________________________________________________________ 2 I C-Compatible RTC in a TDFN GROUND PLANE VIA CONNECTION V PLANE CC * VIA CONNECTION 0.1µF SM CAP * ** * SM WATCH ...

Page 16

I C-Compatible RTC in a TDFN (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages PIN 1 INDEX AREA NUMBER OF LEADS SHOWN ...

Page 17

... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 17 © 2003 Maxim Integrated Products ...

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