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參數(shù)資料
| 型號： | DS1643 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Nonvolatile Timekeeping RAM(非易失性計時RAM) |
| 中文描述： | 非易失時鐘RAM |
| 文件頁數(shù)： | 1/13頁 |
| 文件大?。?/td> | 131K |
| 代理商： | DS1643 |
DS1643/DS1643P
Nonvolatile Timekeeping RAM
DS1643/DS1643P
PRELIMINARY
031698 1/13
FEATURES
Integrated NV SRAM, real time clock, crystal, power–
fail control circuit and lithium energy source
Clock registers are accessed identical 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
Access times of 120 ns and 150 ns
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
pow-
er supply tolerance
DS1643 only (DIP Module)
– Standard JEDEC Byte–wide 8K x 8 RAM pinout
DS1643P only (PowerCap Module Board)
– Surface mountable package for direct connec-
tion to PowerCap containing battery and crystal
– Replaceable battery (PowerCap)
– Power–fail output
– Pin–for–pin compatible with other densities of
DS164XP Timekeeping RAM
ORDERING INFORMATION
DS1643–XXX
–120 120 ns access
150 ns access
–150
*DS1643P–XXX
–120 120 ns access
150 ns access
–150
28–pin DIP module
34–pin PowerCap Module Board
*DS9034PCX
(PowerCap) Required;
must be ordered separately
PIN ASSIGNMENT
CE
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
GND
OE
V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
NC
NC
NC
NC
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
NC
NC
NC
34–PIN POWERCAP MODULE BOARD
(USES DS9034PCX POWERCAP)
X1
GND
X2
V
BAT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
NC
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
GND
VCC
CE2
A8
A9
A11
A10
DQ7
DQ6
DQ5
DQ4
DQ3
WE
OE
CE
28–PIN ENCAPSULATED PACKAGE
(700 MIL EXTENDED)
PIN DESCRIPTION
A0–A12
CE
CE2
OE
WE
V
CC
GND
DQ0–DQ7
NC
PFO
X1, X2
V
BAT
– Address Input
– Chip Enable
– Chip Enable 2 (DS1643 only)
– Output Enable
– Write Enable
– +5 Volts
– Ground
– Data Input/Output
– No Connect
– Power–Fail Output (DS1643P only)
– Crystal Connection
– Battery Connection
相關PDF資料 |
PDF描述 |
|---|---|
| DS1643P | Nonvolatile Timekeeping RAM(非易失性計時RAM) |
| DS1644 | Nonvolatile Timekeeping RAM(非易失性計時RAM) |
| DS1644P | Nonvolatile Timekeeping RAM(非易失性計時RAM) |
| DS1646 | Nonvolatile Timekeeping RAM(非易失性計時RAM) |
| DS1646P | Nonvolatile Timekeeping RAM(非易失性計時RAM) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS1643_1 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Nonvolatile Timekeeping RAM |
| DS1643_10 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Nonvolatile Timekeeping RAMs |
| DS1643-100 | 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 |
| DS1643-100+ | 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 |
| DS1643-12 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Real-Time Clock |
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