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參數(shù)資料
I2C RTC with Trickle Charger
DS1340
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
General Description
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
on the VBACKUP pin, a lower timekeeping voltage, and
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-
ally through an I2C bidirectional bus.
Applications
Portable Instruments
Point-of-Sale Equipment
Medical Equipment
Telecommunications
Features
Enhanced Second Source for the ST M41T00
Available in a Surface-Mount Package with an
Integrated Crystal (DS1340C)
Fast (400kHz) I2C Interface
Software Clock Calibration
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
Available in 8-Pin SOP or SO Packages
Underwriters Laboratories (UL) Recognized
Ordering Information
4
CPU
VCC
5
6
8
12
SDA
SCL
GND
X2
X1
VCC
C1
RPU
CRYSTAL
FT/OUT
VBACKUP
3
7
RPU = tR / CB
DS1340
Typical Operating Circuit
PART
TEMP RANGE
PIN-
PACKAGE
TOP MARK
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)
D134033
DS1340U-18+
-40°C to +85°C
8 μSOP
1340 -18
DS1340U-3+
-40°C to +85°C
8 μSOP
1340 -3
DS1340U-33+
-40°C to +85°C
8 μSOP
1340 -33
DS1340C-18#
-40°C to +85°C
16 SO
DS1340C-18
DS1340C-3#
-40°C to +85°C
16 SO
DS1340C-3
DS1340C-33#
-40°C to +85°C
16 SO
DS1340C-33
Pin Configurations appear at end of data sheet.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
#
Denotes a RoHS-compliant device that may include lead(Pb)
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(Pb)-free device.
A "#" denotes a RoHS-compliant device.
19-5578; Rev 8; 4/13
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS1340U-33/T&R | 制造商:Maxim Integrated Products 功能描述:IC RTC I2C W/CHARGER 3.3V 8-USOP |
| DS1340U-33/T&R | 功能描述:實時時鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1340U-33+ | 功能描述:實時時鐘 I2C RTC w/Trickle Charger RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1340U-33+T&R | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 8USOP - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC RTC I2C W/CHARGER 3.3V 8-USOP 制造商:Maxim Integrated Products 功能描述:Real Time Clock I2C RTC w/Trickle Charger |
| DS1340U-33+T&R | 功能描述:實時時鐘 I2C RTC w/Trickle Charger RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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