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參數資料
| 型號： | DS1644P |
| 英文描述： | Nonvolatile Timekeeping RAM |
| 中文描述： | 非易失時鐘RAM |
| 文件頁數： | 1/13頁 |
| 文件大小： | 302K |
| 代理商： | DS1644P |
1 of 13
REV: 040805
FEATURES
Integrated NV SRAM, Real-Time Clock,
Crystal, Power-Fail Control Circuit and
Lithium Energy Source
Clock Registers are Accessed Identically to
the Static RAM. These Registers are
Resident in the Eight Top RAM Locations.
Totally Nonvolatile with Over 10 Years of
Operation in the Absence of Power
BCD-Coded Year, Month, Date, Day, Hours,
Minutes, and Seconds with Leap Year
Compensation Valid Up to 2100
Power-Fail Write Protection Allows for
±10% V
CC
Power Supply Tolerance
DS1644 Only (DIP Module)
Upward Compatible with the DS1643
Timekeeping RAM to Achieve Higher
RAM Density
Standard JEDEC Bytewide 32k x 8 Static
RAM Pinout
DS1644P Only (PowerCap
Module Board)
Surface Mountable Package for Direct
Connection to PowerCap Containing
Battery and crystal
Replaceable Battery (PowerCap)
Power-Fail Output
Pin-for-Pin Compatible with Other Densities
of DS164XP Timekeeping RAM
Underwriters Laboratory (UL) Recognized
ORDERING INFORMATION
VOLTAGE
RANGE (V)
DS1644
0120+
5.0
DS16440-120
5.0
DS1644P
120+
5.0
DS1644P-120
5.0
*
DS9034-PCX, DS9034I-PCX, DS9034-PCX+ required (must be ordered separately).
A “+" indicates a lead-free product. The top mark will include a “+" symbol on lead-free devices.
PIN CONFIGURATIONS
PART
TEMP RANGE PIN-PACKAGE
TOP MARK
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
32 EDIP (0.740a)
32 EDIP (0.740a)
34 PowerCap*
34 PowerCap*
DS1644+120
DS1644-120
DS1644P+120
DS1644P-120
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
NC
NC
NC
PFO
V
CC
WE
OE
CE
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
GND
NC
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
34
NC
X1 GND V
BAT
X2
34-Pin PowerCap Module Board
(Uses DS9034PCX PowerCap)
15
13
27
26
25
24
23
22
21
20
19
18
17
28-Pin Encapsulated Package
(720-mil Extended)
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
GND
DQ2
V
CC
WE
A13
A8
A9
A11
OE
A10
CE
DQ7
DQ6
DQ5
DQ4
DQ3
1
2
3
4
5
6
7
8
9
10
11
12
14
28
16
A12
A14
DS1644/DS1644P
Nonvolatile Timekeeping RAM
www.maxim-ic.com
PowerCap is a registered trademark of Dallas Semiconductor.
相關PDF資料 |
PDF描述 |
|---|---|
| DS1644P-120 | Nonvolatile Timekeeping RAM |
| DS1644J | Quad Clock Driver |
| DS1648J | 2-Input Digital Multiplexer |
| DS3644J | 800mA, Low-Voltage, DC-DC Step-Up Converter, Logic-High On - TDFN-10 |
| DS3644N | Low Voltage, 1.2 MHz, Micropower, DC-DC Step-Up Converter, Powersave Operation (medium loads), shutdown battery feedthrough - TSOT23-6 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| DS1644P+120 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Nonvolatile Timekeeping RAM |
| DS1644P-120 | 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 |
| DS1644P120+ | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Nonvolatile Timekeeping RAM |
| DS1644P-120+ | 功能描述:實時時鐘 NV Timekeeping RAM 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 |
| DS1644P-150 | 制造商:Maxim Integrated Products 功能描述: |
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