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General Description
The DS1318 parallel-interface elapsed time counter
(ETC) is a 44-bit counter that maintains the amount of
time that the device operates from main and/or backup
power or during an external event. The internal
frequency of the counter clock is 4.096kHz, which pro-
vides a 244s resolution and a maximum count of over
136 years. A built-in power-sense circuit detects power
failures, automatically switches to the backup supply,
and controls the timer. If an external event timer is
desired, the control input EXT can control the counter
operation. An open-drain output provides an interrupt,
and a square-wave output provides a programmable
square wave. The DS1318 is accessed through a byte-
wide parallel interface, and operates over the industrial
temperature range.
Applications
Power Meters
Industrial Controls
Servers
Features
Byte-Wide Parallel Interface
44-Bit Binary Counter Provides Timer with 244s
Resolution
Automatic Power-Fail Detect and Switch Circuitry
Selects Power Source from the Primary Power
and the Battery, and Write Protects the Internal
Registers
Internal Power-Fail Circuit Allows Timer to
Provide Primary or Battery Operation Times
Timer can Alternately Provide an Event Timer of
Either an Active-High or Active-Low Pulse
Interrupt Output Generated Periodically or When
the Upper 32 Bits of the Counter Match an Alarm
Register
Square-Wave Output with 16 Selectable
Frequencies from 32.768kHz to 0.5Hz
+3.3V Operation
Industrial Temperature Range: -40°C to +85°C
Underwriters Laboratories (UL) Recognized
DS1318
Parallel-Interface Elapsed Time Counter
______________________________________________
Maxim Integrated Products
1
DS1318
GND
24
23
22
21
20
19
18
17
16
15
X1
TOP VIEW
X2
VBAT
VCC
WE
OE
CE
DQ7
DQ6
DQ5
DQ4
DQ3
TSSOP
(4.4mm)
DQ2
DQ1
DQ0
A0
A1
A2
A3
1
+
2
3
4
5
10
9
8
7
6
11
12
14
13
SQW
IRQ
EXT
GND
Pin Configuration
Ordering Information
DS1318
-
CPU
VCC
DQ–DQ7
A3–A0
GND
RPU
SQW
X1
IRQ
WE
OE
CE
X2
EXT
EXTERNAL
COUNTER
ENABLE
(EVENT TIMER)
0.1
μF
VBAT
Typical Operating Circuit
19-5664; Rev 1; 12/10
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
PART
TEMP RANGE
PIN-PACKAGE
DS1318E+
-40°C to +85°C
24 TSSOP
DS1318E+T&R
-40°C to +85°C
24 TSSOP
+
Denotes a lead(Pb)-free/RoHS-compliant package.
T&R = Tape and reel.
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相关代理商/技术参数
DS1318E+T&R 制造商:Maxim Integrated Products 功能描述:44 BIT PRLLEL INTFC ETC TRL LF - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC COUNTER ELAPSED TIME 24TSSOP
DS1318E+T&R 功能描述:实时时钟 PARALLEL-INTERFACE ELAPSED TIME COUNTER RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube
DS13-1Y 功能描述:固态继电器-工业安装 RoHS:否 制造商:Crydom 控制电压范围:4 VDC to 32 VDC 负载电压额定值:7 VDC to 72 VDC 负载电流额定值:160 A 触点形式: 输出设备:SSR 安装风格:Panel
DS1321 功能描述:IC CTRLR NV W/BATT MON 5V 16-DIP RoHS:否 类别:集成电路 (IC) >> 存储器 - 控制器 系列:- 标准包装:45 系列:- 控制器类型:静态 RAM（SRAM） 电源电压:4.5 V ~ 5.5 V 工作温度:0°C ~ 70°C 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 供应商设备封装:16-SOIC W 包装:管件
DS1321_04 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Flexible Nonvolatile Controller with Lithium Battery Monitor
DS1321+ 功能描述:存储器控制器 Flexible NV Cntlr w/Lithium Battery RoHS:否 制造商:Maxim Integrated
DS1321E 功能描述:IC CTRL NV W/BATT MON 5V 20TSSOP RoHS:否 类别:集成电路 (IC) >> 存储器 - 控制器 系列:- 标准包装:45 系列:- 控制器类型:静态 RAM（SRAM） 电源电压:4.5 V ~ 5.5 V 工作温度:0°C ~ 70°C 封装/外壳:16-SOIC（0.295"，7.50mm 宽） 供应商设备封装:16-SOIC W 包装:管件
DS1321E/T&R 制造商:Maxim Integrated Products 功能描述:NV CONTRL 5V X4 BW&RST 20-TSSOP T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC CTRL NV W/BATT MON 5V 20TSSOP