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参数资料
| 型号： | DS1216E |
| 厂商： | DALLAS SEMICONDUCTOR |
| 元件分类： | XO, clock |
| 英文描述： | SmartWatch/RAM 16K/66K(16K/66K带实时时钟的ROM或掉电保护RAM插座) |
| 中文描述： | 0 TIMER(S), REAL TIME CLOCK, PDIP28 |
| 封装： | 0.600 INCH, DIP-28 |
| 文件页数： | 1/9页 |
| 文件大小： | 91K |
| 代理商： | DS1216E |
DS1216E
SmartWatch/ROM 64K/256K
DS1216E
031998 1/9
FEATURES
Keeps track of hundredths of seconds, seconds, min-
utes, hours, days, date of month, months, and years
Adds timekeeping to any 28–pin JEDEC bytewide
memory location
Embedded lithium energy cell maintains calendar
time for more than 10 years in the absence of power
Timekeeping function is transparent to memory oper-
ation
Month and year determine the number of days in each
month; leap year compensation valid up to 2100
Lithium energy source is electrically disconnected to
retain freshness until power is applied for the first time
Proven gas–tight socket contacts
Full
±
10% V
CC
operating range
Operating temperature range 0
°
C to 70
°
C
Accurate to within
±
1 minute/month @ 25
°
C
PIN ASSIGNMENT
28–PIN INTELLIGENT SOCKET
RST
1
2
3
4
5
6
7
A2
8
9
A0
10
DQ0
11
12
13
GND 14
28
V
CC
27
26
25
24
23
22
OE
21
20
CE
19
18
17
16
15
PIN DESCRIPTION
Pin 1
Pin 8
Pin 10
Pin 11
Pin 14
Pin 20
Pin 22
Pin 28
All pins pass through to the socket except 20.
RST
A2
A0
DQ0
GND
CE
OE
V
CC
– Reset
– Address Bit 2 (READ/WRITE)
– Address Bit 0 (Data Input)
– I/O
0
(Data Output)
– Ground
– Conditioned Chip Enable
– Output Enable
– +5 VDC to the Socket
DESCRIPTION
The DS1216E SmartWatch/ROM 64/256K is a 28–pin,
600 mil–wide DIP socket with a built–in CMOS time-
keeper function and an embedded lithium energy
source to maintain time and date. It accepts any 28–pin
bytewide ROM or volatile RAM. A key feature of the
SmartWatch is that the timekeeper function remains
transparent to the memory device placed above. The
SmartWatch monitors V
CC
for an out–of–tolerance con-
dition. When such a condition occurs, an internal lithium
energy source is automatically switched on to prevent
loss of watch data.
Using the SmartWatch saves PC board space since the
combination of the SmartWatch and the mated memory
device takes up no more area than the memory alone.
The SmartWatch uses pins 1, 8, 10, 11, 20, and 22 for
timekeeper control. All pins pass through to the socket
receptacle except for pin 20 (CE), which is inhibited dur-
ing the transfer of time information.
The SmartWatch provides timekeeping information in-
cluding hundredths of seconds, seconds, minutes,
hours, days, date, month, and year information. The
date at the end of the month is automatically adjusted for
months with fewer than 31 days, including correction for
leap years. The SmartWatch operates in either 24–hour
or 12–hour format with an AM/PM indicator.
相关PDF资料 |
PDF描述 |
|---|---|
| DS1216F | SmartWatch/ROM 64K/256K/1M(64K/256K/1M位带实时时钟的ROM或掉电保护RAM插座) |
| DS1218 | Nonvolatile Controller(非易失性控制器) |
| DS1220AB | 16K Nonvolatile SRAM(16K非易失性SRAM) |
| DS1220AD | 16K Nonvolatile SRAM(16K非易失性SRAM) |
| DS1220Y | 16K Nonvolatile SRAM(16K 非易失性静态RAM) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1216F | 功能描述:IC SMART/ROM 3V 64/256/1M 32DIP 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 |
| DS1216F-3 | 功能描述:IC SMART/ROM 3V 64/256/1M 32DIP 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 |
| DS1216H | 功能描述:存储器控制器 SmartWatch RAM RoHS:否 制造商:Maxim Integrated |
| DS1216MP000 | 制造商:Thomas & Betts 功能描述:100A,PLG,2P3W,MG,216,208V |
| DS1216MR000 | 制造商:Thomas & Betts 功能描述:100A,NLT,2P3W,MG,216,208V |
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