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D1340-33 PDF预览

D1340-33

更新时间: 2022-04-23 23:00:11
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14页 236K
描述
I2C RTC with Trickle Charger

D1340-33 数据手册

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Rev 4; 3/06  
2
I C RTC with Trickle Charger  
General Description  
Features  
Enhanced Second Source for the ST M41T00  
The DS1340 is a real-time clock (RTC)/calendar that is  
pin compatible and functionally equivalent to the ST  
M41T00, including the software clock calibration. The  
device additionally provides trickle-charge capability  
Available in a Surface-Mount Package with an  
Integrated Crystal (DS1340C)  
2
Fast (400kHz) I C Interface  
on the V  
pin, a lower timekeeping voltage, and  
BACKUP  
Software Clock Calibration  
an oscillator STOP flag. Block access of the register  
map is identical to the ST device. Two additional regis-  
ters, which are accessed individually, are required for  
the trickle charger and flag. The clock/calendar pro-  
vides seconds, minutes, hours, day, date, month, and  
year information. A built-in power-sense circuit detects  
power failures and automatically switches to the back-  
up supply. Reads and writes are inhibited while the  
clock continues to run. The device is programmed seri-  
RTC Counts Seconds, Minutes, Hours, Day, Date,  
Month, and Year  
Automatic Power-Fail Detect and Switch Circuitry  
Trickle-Charge Capability  
Low Timekeeping Voltage Down to 1.3V  
Three Operating Voltage Ranges (1.8V, 3V, and 3.3V)  
Oscillator Stop Flag  
ally through an I C* bidirectional bus.  
2
Available in 8-Pin µSOP or SO Packages  
Underwriters Laboratory (UL) Recognized  
Applications  
Ordering Information  
Portable Instruments  
Point-of-Sale Equipment  
Medical Equipment  
Telecommunications  
TOP  
MARK  
PART  
TEMP RANGE PIN-PACKAGE  
DS1340Z-18  
DS1340Z-3  
DS1340Z-33  
DS1340U-18  
DS1340U-3  
DS1340U-33  
DS1340C-18  
DS1340C-3  
DS1340C-33  
-40°C to +85°C 8 SO (0.150in) D1340-18  
-40°C to +85°C 8 SO (0.150in) DS1340-3  
-40°C to +85°C 8 SO (0.150in) D1340-33  
-40°C to +85°C 8 µSOP  
-40°C to +85°C 8 µSOP  
-40°C to +85°C 8 µSOP  
-40°C to +85°C 16 SO  
-40°C to +85°C 16 SO  
-40°C to +85°C 16 SO  
1340A1-18  
1340A1-3  
1340A1-33  
1340C-18  
1340C-3  
Typical Operating Circuit  
V
V
CC  
CC  
CRYSTAL  
1340C-33  
V
CC  
C1  
R
PU  
R
PU  
1
2
8
DS1340Z-18+ -40°C to +85°C 8 SO (0.150in) D1340-18  
DS1340Z-3+ -40°C to +85°C 8 SO (0.150in) DS1340-3  
DS1340Z-33+ -40°C to +85°C 8 SO (0.150in) D1340-33  
X1  
X2  
V
CC  
7
3
6
5
SCL  
FT/OUT  
CPU  
DS1340U-18+ -40°C to +85°C 8 µSOP  
DS1340U-3+ -40°C to +85°C 8 µSOP  
1340A1-18  
1340A1-3  
1340A1-33  
1340C-18  
1340C-3  
DS1340  
SDA  
V
BACKUP  
DS1340U-33+ -40°C to +85°C 8 µSOP  
DS1340C-18# -40°C to +85°C 16 SO  
GND  
4
R
PU  
= t / C  
R B  
DS1340C-3#  
-40°C to +85°C 16 SO  
DS1340C-33# -40°C to +85°C 16 SO  
1340C-33  
+ Denotes a lead-free/RoHS-compliant device.  
# Denotes a RoHS-compliant device that may include lead that  
is exempt under RoHS requirements. The lead finish is JESD97  
category e3, and is compatible with both lead-based and lead-  
free soldering processes.  
A "+" anywhere on the top mark denotes a lead-free device.  
A "#" denotes a RoHS-compliant device.  
2
*Purchase of I C components from Maxim Integrated Products,  
Inc., or one of its sublicensed Associated Companies, conveys  
2
a license under the Philips I C Patent Rights to use these com-  
2
ponents in an I C system, provided that the system conforms to  
2
the I C Standard Specification as defined by Philips.  
Pin Configurations appear at end of data sheet.  
______________________________________________ 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.  

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