|
|
PDF MAX6901 Data sheet ( Hoja de datos )
| Número de pieza | MAX6901 | |
| Descripción | I2C-Compatible RTC in a TDFN | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MAX6901 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
|
No Preview Available !
19-1942; Rev 3; 6/03
I2C-Compatible RTC in a TDFN
General Description
The MAX6900, I2C™-bus-compatible real-time clock
(RTC) in a 6-pin TDFN package contains a real-time
clock/calendar and 31-byte ✕ 8-bit wide of static ran-
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.
Portable Instruments
Point-of-Sale Equipment
Intelligent Instruments
Battery-Powered Products
Applications
I2C is a trademark of Philips Corp. Purchase of I2C components
of Maxim Integrated Products, Inc., or one of its sublicensed
Associated Companies, conveys a license under the Philips I2C
Patent Rights to use these components in an I2C system, provid-
ed that the system conforms to the I2C Standard Specification
as defined by Philips.
PART
SERIAL BUS
SRAM
MAX6900
I2C compatible
MAX6901
3-wire
MAX6902
SPI™ compatible
SPI is a trademark of Motorola, Inc.
31 ✕ 8
31 ✕ 8
31 ✕ 8
Pin Configuration
TOP VIEW
VCC 1
X1 2
MAX6900
6 SDA
5 SCL
X2 3
TDFN
4 GND
Features
o Real-Time Clock Counts Seconds, Minutes,
Hours, Date, Month, Day, and Year
o Leap Year Compensation Valid up to Year 2100
o Fast (400kHz) I2C-Bus-Compatible Interface from
2.0V to 5.5V
o 31 ✕ 8 SRAM for Scratchpad Data Storage
o Uses Standard 32.768kHz, 12.5pF Load, Watch
Crystal
o Ultra-Low 225nA (typ) Timekeeping Current
o Single-Byte or Multiple-Byte (Burst Mode) Data
Transfer for Read or Write of Clock Registers or
SRAM
o 6-Pin 3mm x 3mm x 0.8mm TDFN Surface-Mount
Package
o No External Crystal Bias Resistors or Capacitors
Required
Ordering Information
PART
MAX6900ETT-T
TEMP RANGE
-40°C to +85°C
PIN-
PACKAGE
6 TDFN
TOP
MARK
AEU
Related Real-Time Clock Products
ALARM
FUNCTION
—
Polled
Polled
OUTPUT
FREQUENCY
—
32kHz
—
PIN-PACKAGE
6 TDFN
8 TDFN
8 TDFN
Typical Operating Circuit
VCC
VCC
RPU RPU
0.01µF VCC
µC
RPU = tr/Cbus
1
5
SCL
VCC
X1 2
MAX6900
6 SDA
GND
3
X2
4
CRYSTAL
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
I2C-Compatible RTC in a TDFN
X1
X2
OSCILLATOR
32.768kHz
DIVIDER
1Hz
VCC
GND CONTROL
LOGIC
SCL I2C BUS
SDA INTERFACE
ADDRESS
REGISTER
31 X 8
SRAM
SECONDS
MINUTES
HOURS
DATE
MONTH
DAY
YEAR
CONTROL
CENTURY
CLOCK
BURST
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 this timekeeping oscillator. Power-up oscil-
lator start-time is dependent mainly upon applied VCC
and ambient temperature. The MAX6900, because of
its low timekeeping current, exhibits a typical startup
time between 5s to 10s.
I2C-Compatible Interface
Interfacing the MAX6900 with a microprocessor or
other I2C master is made easier by using the serial, I2C-
bus-compatible or other I2C master interface. Only 2
wires are required to communicate with the clock and
SRAM: SCL (serial clock) and SDA (data line). Data is
transferred to and from the MAX6900 over the I/O data
line, SDA. The MAX6900 uses 7-bit slave ID address-
ing. The MAX6900 does not respond to general call
address commands.
Applications Information
I2C-Bus-Compatible Interface
The I2C-bus-compatible serial interface allows bidirec-
tional, 2-wire communication between multiple ICs. The
two lines are SDA and SCL. Connect both lines to a
positive supply through individual pullup resistors. A
device on the I2C-compatible bus that generates a
message is called a transmitter and a device that
receives the message is a receiver. The device that
controls the message is the master and the devices
that are controlled by the master are called slaves
(Figure 3). The word message refers to data in the form
of three 8-bit bytes for a Single Read or Write. The first
byte is the Slave ID byte, the second byte is the
Address/Command byte, and the third is the data.
Data transfer can only be initiated when the bus is not
busy (both SDA and SCL are high). A high-to-low tran-
sition of SDA while SCL is high is defined as the Start
(S) condition; low-to-high transition of the data line
while SCL is high is defined as the Stop (P) condition
(Figure 4).
_______________________________________________________________________________________ 5
5 Page 
I2C-Compatible RTC in a TDFN
Table 3. Data Transfer Summary
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet MAX6901.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MAX690 | Microprocessor Supervisory Circuits | Maxim Integrated |
| MAX690 | I2C-Compatible RTC in a TDFN | Maxim Integrated |
| MAX690 | Microprocessor Supervisory Circuits | Maxim Integrated |
| MAX6900 | I2C-Compatible RTC in a TDFN | Maxim Integrated |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |