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参数资料
| 型号： | DS1642-70+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/13页 |
| 文件大小： | 0K |
| 描述： | IC RAM TIMEKEEP NV 70NS 24-EDIP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 14 |
| 类型： | 时钟/日历 |
| 特点： | 闰年，NVSRAM |
| 存储容量： | 2KB |
| 时间格式： | HH:MM:SS（24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | 并联 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 24-DIP 模块（0.600"，15.24mm） |
| 供应商设备封装： | 24-EDIP |
| 包装： | 管件 |
DS1642
2 of 13
PIN DESCRIPTION
PIN
NAME
FUNCTION
1
A7
2
A6
3
A5
4
A4
5
A3
6
A2
7
A1
8
A0
19
A10
22
A9
23
A8
Address Input
9
DQ0
10
DQ1
11
DQ2
13
DQ3
14
DQ4
15
DQ5
16
DQ6
17
DQ7
Data Input/Output
12
GND
Ground
18
CE
Active-Low Chip-Enable Input
20
OE
Active-Low Output-Enable Input
21
WE
Active-Low Write-Enable Input
24
VCC
Power-Supply Input
DESCRIPTION
The DS1642 is a 2k x 8 nonvolatile static RAM and a full-function real-time clock (RTC), both of which
are accessible in a bytewide format. The nonvolatile time keeping RAM is pin and function equivalent to
any JEDEC-standard 2k x 8 SRAM. The device can also be easily substituted in ROM, EPROM, and
EEPROM sockets, providing read/write nonvolatility and the addition of the real-time clock function. The
real-time clock information resides in the eight uppermost RAM locations. The RTC registers contain
year, month, date, day, hours, minutes, and seconds data in 24-hour BCD format. Corrections for the day
of the month and leap year are made automatically. The RTC clock registers are double-buffered to avoid
access of incorrect data that can occur during clock update cycles. The double-buffered system also
prevents time loss as the timekeeping countdown continues unabated by access to time register data. The
DS1642 also contains its own power-fail circuitry, which deselects the device when the VCC supply is in
an out-of-tolerance condition. This feature prevents loss of data from unpredictable system operation
brought on by low VCC as errant access and update cycles are avoided.
相关PDF资料 |
PDF描述 |
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| DS1643P-70+ | IC RAM TIMEKEEP NV 70NS 34-PCM |
| DS1644P-120 | IC RAM TIMEKEEP NV 120NS 34-PCM |
| DS1646-120+ | IC RAM TIMEKEEP NV 120NS 32-EDIP |
| DS1647P-120 | IC RAM TIMEKEEP NV 120NS 34-PCM |
| DS1670S | IC CTRLR SYSTEM PORTABLE 20-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1642-70+ | 功能描述:实时时钟 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 |
| DS1642-85 | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK PARALLEL 2KBYTE 24PIN EDIP - Bulk |
| DS1642-85+ | 功能描述:实时时钟 NV Timekeeping RAM 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 |
| DS-1642ZJ | 制造商:Hikvision USA 功能描述:6" Outdoor Speed Dome Bracket, White, Ceiling Mount Bracket |
| DS1643 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Nonvolatile Timekeeping RAMs |
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