DS1342U+ Maxim Integrated Products, DS1342U+ Datasheet - Page 4

• Manufacturer Part Number: DS1342U+
• Description: IC RTC I2C W/ALARM 8USOP
• Manufacturer: Maxim Integrated Products
• Type: Clock/Calendar/Alarmr

Specifications of DS1342U+

• Time Format: HH:MM:SS (12/24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -

Low-Current I
4
Note 11: C B is the total capacitance of one bus line, including all connected devices, in pF.
Note 12: The parameter t OSF is the period of time the oscillator must be stopped for the OSF flag to be set over the voltage
Note 13: The DS1341/DS1342 can detect any single SCL clock held low longer than t
Figure 1. Data Transfer on I
SCL
SDA
SDA
SCL
NOTE: TIMING IS REFERENCED TO V
X1
X2
STOP
range of 2.4V P V
in reset state and can receive a new START condition when SCL is held low for at least t
detects this condition, the SDA output is released. The oscillator must be running for this function to work.
t
BUF
N
START
t
DS1341/DS1342
HD:STA
ILMAX
INTERFACE AND
t
SERIAL BUS
LOW
2
ADDRESS
REGISTER
CC
AND V
C Serial Bus
P V
IHMIN
CCMAX
t
.
R
2
C RTCs for High-ESR Crystals
t
.
HD:DAT
32.768kHz
CONTROL LOGIC
/4
t
HIGH
8.192kHz
t
F
/2
t
SU:DAT
4.096kHz
/32
OSC-1Hz
128Hz
REPEATED
START
EXT-1Hz
t
SU:STA
CALENDAR REGISTERS
EXTSYNC
CONTROL REGISTERS
t
HD:STA
ALARM AND
CLOCK AND
OSC-1Hz
TIMEOUTMIN
DIVIDER
Functional Diagram
BUFFER
MUX/
. The devices’ I
TIMEOUTMAX
N
t
SP
V
CC
. Once the device
P
N
2
C interface is
t
SU:STO
SQW/INTB
CLKIN/INTA