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DS1340U-33

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
DS1340
I
2
C RTC with Trickle Charger
______________________________________________________________________________________ 13
MASTER TO SLAVE SLAVE TO MASTER
...
AXXXXXXXXA1101000S 0 XXXXXXXX A XXXXXXXX A XXXXXXXX A P
<DATA (n + X)
S - START
A - ACKNOWLEDGE (ACK)
P - STOP
R/W - READ/WRITE OR DIRECTION BIT ADDRESS
DATA TRANSFERRED
(X + 1 BYTES + ACKNOWLEDGE)
<SLAVE
ADDRESS> <R/W> <WORD ADDRESS (n)> <DATA (n)> <DATA (n + 1)>
Figure 8. Data Write—Slave Receiver Mode
...
AXXXXXXXXA1101000S 1 XXXXXXXX A XXXXXXXX A XXXXXXXX A P
S - START
A - ACKNOWLEDGE (ACK)
P - STOP
A - NOT ACKNOWLEDGE (NACK)
R/W - READ/WRITE OR DIRECTION BIT ADDRESS
DATA TRANSFERRED
(X + 1 BYTES + ACKNOWLEDGE)
NOTE: LAST DATA BYTE IS FOLLOWED BY A NACK.
MASTER TO SLAVE SLAVE TO MASTER
<DATA (n + X)>
<SLAVE
ADDRESS> <R/W> <DATA (n)> <DATA (n + 1)> <DATA (n + 2)>
Figure 9. Data Read—Slave Transmitter Mode
S - START
Sr - REPEATED START
A - ACKNOWLEDGE (ACK)
P - STOP
A - NOT ACKNOWLEDGE (NACK)
R/W - READ/WRITE OR DIRECTION BIT ADDRESS
<R/W><R/W> <WORD ADDRESS (n)>
<SLAVE
ADDRESS>
<SLAVE
ADDRESS>
AXXXXXXXXA1101000 1101000S Sr0 A1
DATA TRANSFERRED
(X + 1 BYTES + ACKNOWLEDGE)
NOTE: LAST DATA BYTE IS FOLLOWED BY A NACK.
MASTER TO SLAVE SLAVE TO MASTER
AXXXXXXXX XXXXXXXX A XXXXXXXX A XXXXXXXX A P
<DATA (n)> <DATA (n + 1)> <DATA (n + 2)> <DATA (n + X)>
...
Figure 10. Data Write/Read (Write Pointer, Then Read)—Slave Receive and Transmit
DS1340
I
2
C RTC with Trickle Charger
14 ______________________________________________________________________________________
Chip Information
PROCESS: CMOS
SUBSTRATE CONNECTED TO GROUND
Thermal Information
Theta-JA: 170°C/W (0.150in SO)
Theta-JC: 40°C/W (0.150in SO)
Theta-JA: 221°C/W (µSOP)
Theta-JC: 39°C/W (µSOP)
Theta-JA: 89.6°C/W (0.300in SO)
Theta-JC: 24.8°C/W (0.300in SO)
Handling, PC Board Layout,
and Assembly
The DS1340C package contains a quartz tuning-fork
crystal. Pick-and-place equipment may be used, but
precautions should be taken to ensure that excessive
shocks are avoided. Exposure to reflow is limited to 2
times maximum. Ultrasonic cleaning should be avoided
to prevent damage to the crystal.
Avoid running signal traces under the package, unless
a ground plane is placed between the package and the
signal line. All N.C. (no connect) pins must be connect-
ed to ground.
Moisture-sensitive packages are shipped from the facto-
ry dry-packed.Handling instructions listed on the pack-
age label must be followed to prevent damage during
reflow. Refer to the IPC/JEDEC J-STD-020 standard for
moisture-sensitive device (MSD) classifications.
1
2
3
4
8
7
6
5
V
CC
FT/OUT
SCL
SDA
V
BACKUP
GND
X2
X1
TOP VIEW
SO, μSOP
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
SCL
SDA
GND
V
BACKUP
N.C.
N.C.
N.C.
N.C.
N.C.
SO (300 mils)
FT/OUT
V
CC
N.C.
N.C.
N.C.
N.C.
N.C.
DS1340
DS1340C
Pin Configurations
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE NO.
LAND
PATTERN NO.
8 SO (150 mils) S8+2
21-0041
90-0096
8 µSOP U8+1
21-0036
90-0092
16 SO (300 mils) W16#H2
21-0042 90-0107
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maxim-ic.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.
DS1340
I
2
C RTC with Trickle Charger
______________________________________________________________________________________ 15
Revision History
REVISION
NUMBER
REVISION
DATE
DESCRIPTION
PAGES
CHANGED
0 6/03
Initial release. —
Changed “2-wire” to “I
2
C” throughout the data sheet.
All
Added UL recognition info bullet to the Features section and to the V
BACKUP
pin
description.
1, 6
Added the “I/O Capacitance (SCL, SDA)” parameter (C
I/O
) to the AC Electrical
Characteristics table.
2
1 7/04
Added “SDA, SCL” and “V
CC
= 0V” to the “Supply Voltage, Pullup (FT/OUT)” parameter
and changed the symbol from “V
IH
” to “V
PU
” in the Recommended DC Operating
Conditions table; in the DC Electrical Characteristics table, changed the “Oscillator
Current” parameter to “V
BACKUP
Current.”
3
Added the integrated-crystal and lead-free packages to the Ordering Information table;
added the integrated-crystal packages to the Features, Pin Configurations, Pin
Description.
1, 6
In Table 1, added increased crystal ESR with increased supply minimum voltage
requirement.
6
Added the DS1340C Only section. 7
Updated Figure 5 to also show the “C Version” crystal. 7
Added the Handling, PC Board Layout, and Assembly section. 12
2 12/04
Added the integrated-crystal package Theta-JA and Theta-JC information to the
Thermal Information section.
13
3 11/05 Updated the Ordering Information table to correct lead-free/RoHS packages. 1
In the General Description section, indicated that the time and date function continues
while powered by V
BACKUP
.
1
Updated the Typical Operating Circuit by removing pin numbers and adding a bypass
capacitor.
1
In the Pin Description, updated the V
BACKUP
description to indicate that no diodes
should be placed between the battery and pin and added the UL link; changed the
V
CC
description.
6
Added the Power Control section and new Table 1. 6
In the Handling, PC Board Layout, and Assembly section, added solder reflow
information for the RoHS SO package.
13
4 3/06
Added Package Information table. 14
Removed leaded part numbers from the Ordering Information table. 1
Removed the t
RPU
parameter and RST waveform from Figure 2. Replaced t
RST
with t
REC
.
5
In the Typical Operating Characteristics section, updated/changed the “FT vs.
V
BACKUP
” graph to “OSCILLATOR FREQUENCY vs. SUPPLY VOLTAGE (FT x 64).”
5
In the Pin Description, added pullup voltage information to the SDA, SCL, and FT/OUT
descriptions.
6
Updated Figure 5. 8
In the Clock and Calendar section, added text explaining the use of EOSC to halt the
oscillator.
9
5 8/08
Replaced Figure 7 with an updated version; changed Figures 8 and 9 and added
Figure 10 with more comprehensive I
2
C figures.
13
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

DS1340U-33

Mfr. #:
Buy DS1340U-33
Manufacturer:
Maxim Integrated
Description:
Real Time Clock I2C RTC w/Trickle Charger
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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