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參數(shù)資料
| 型號： | DS1215 |
| 英文描述： | Phantom Time Chip |
| 中文描述： | 幻影時鐘芯片 |
| 文件頁數(shù)： | 1/15頁 |
| 文件大?。?/td> | 113K |
| 代理商： | DS1215 |
ACopyright 1997 by Dallas Semiconductor Corporation.
DS1215
Phantom Time Chip
DS1215
032697 1/15
FEATURES
Keeps track of hundredths of seconds, seconds, min-
utes, hours, days, date of the month, months, and
years
Adjusts for months with fewer than 31 days
Leap year automatically corrected up to 2100
No address space required
Provides nonvolatile controller functions for battery
backup of RAM
Supports redundant batteries for high–reliability
applications
Uses a 32.768 KHz watch crystal
Full
±
10% operating range
Operating temperature range 0
°
C to 70
°
C
Space-saving, 16–pin DIP package and SOIC
Optional industrial temperature range –40
°
C to +85
°
C
(IND)
DESCRIPTION
The DS1215 Phantom Time Chip is a combination of a
CMOS timekeeper and a nonvolatile memory controller.
In the absence of power, an external battery maintains
the timekeeping operation and provides power for a
CMOS static RAM. The watch keeps track of hun-
dredths of seconds, seconds, minutes, hours, day, date,
month, and year information. The last day of the month
is automatically adjusted for months with less than 31
days, including correction for leap year every four years.
The watch operates in one of two formats: a 12–hour
mode with an AM/PM indicator or a 24–hour mode. The
nonvolatile controller supplies all the necessary support
circuitry to convert a CMOS RAM to a nonvolatile
memory. The DS1215 can be interfaced with either
RAM or ROM without leaving gaps in memory.
PIN ASSIGNMENT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
X1
X2
WE
BAT1
GND
D
Q
GND
V
CCI
V
CCO
BAT2
RST
OE
CEI
CEO
ROM/RAM
16–PIN DIP (300 MIL)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
X1
X2
WE
BAT1
GND
D
Q
GND
V
CCI
V
CCO
BAT2
RST
OE
CEI
CEO
ROM/RAM
16–PIN SOIC (300 MIL)
PIN DESCRIPTION
X1, X2
WE
BAT1
GND
D
Q
ROM/RAM
CEO
CEI
OE
RST
BAT2
V
CCO
V
CCI
NOTE: Both pins 5 and 8 must be grounded.
– 32.768 KHz Crystal Connections
– Write Enable
– Battery 1 Input
– Ground
– Data In
– Data Out
– ROM/RAM Select
– Chip Enable Out
– Chip Enable Input
– Output Enable
– Reset
– Battery 2 Input
– Switched Supply Output
– +5 VDC Input
ORDERING INFORMATION
DS1215
DS1215S
DS1215N
DS1215SN
16–pin DIP
16–pin SOIC
16–pin DIP (IND)
16–pin SOIC (IND)
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| DS1216C | SmartWatch RAM DS1216B/C/D/H SmartWatch ROM DS1216E/F |
| DS1216D | SmartWatch RAM DS1216B/C/D/H SmartWatch ROM DS1216E/F |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS1215G | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral IC |
| DS1215GN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral IC |
| DS-1215ZJ | 制造商:Hikvision USA 功能描述:Camera Pole Mount Plate7.64In X 4.61In X 3.94In 制造商:HIKVISION 功能描述:CAMERA POLE MOUNT PLATE 7.64IN X 4.61IN X 3.94IN |
| DS1216 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:SmartWatch RAM (DS1216B/C/D/H); SmartWatch ROM (DS1216E/F) |
| DS1216B | 功能描述:存儲器控制器 SmartWatch RAM RoHS:否 制造商:Maxim Integrated |
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