参数资料
| 型号： | DS1693+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/36页 |
| 文件大小： | 0K |
| 描述： | IC RTC W/NV RAM 3V/5V 28-EDIP |
| 标准包装： | 12 |
| 类型： | 时钟/日历 |
| 特点： | NVSRAM |
| 存储容量： | 114B |
| 时间格式： | HH:MM:SS（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | 并联 |
| 电源电压： | 2.7 V ~ 3.3 V，4.5 V ~ 5.5 V |
| 电压 - 电源，电池： | 2.5 V ~ 3.7 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 28-DIP 模块（0.600"，15.24mm） |
| 供应商设备封装： | 28-EDIP |
| 包装： | 管件 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页当前第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页
DS1689/DS1693
2 of 36
PIN DESCRIPTION
PIN
SO
EDIP
NAME
FUNCTION
1
VBAUX
Auxiliary Battery Supply. Auxiliary battery input required for
kickstart and wake-up features. This input also supports
clock/calendar and External NV RAM if VBAT is at lower voltage or
is not present. A standard +3V lithium cell or other energy source
can be used. Battery voltage must be held between +2.5V and +3.7V
for proper operation. If VBAUX is not going to be used it should be
grounded and auxiliary battery enable bit bank 1, register 4BH,
should = 0.
2, 3
—
X1, X2
Connections for Standard 32.768kHz Quartz Crystal. For greatest
accuracy, the DS1689 must be used with a crystal that has a
specified load capacitance of either 6pF or 12.5pF. The crystal select
(CS) bit in Extended Control Register 4B is used to select operation
with a 6pF or 12.5pF crystal. The crystal is attached directly to the
X1 and X2 pins. There is no need for external capacitors or resistors.
Note: X1 and X2 are very high-impedance nodes. It is recommended
that they and the crystal by guard-ringed with ground and that high-
frequency signals be kept away from the crystal area.
For more information on crystal selection and crystal layout
considerations, refer to Application Note 58: Crystal Considerations
with Dallas Real Time Clocks. The DS1689 can also be driven by an
external 32.768kHz oscillator. In this configuration, the X1 pin is
connected to the external oscillator signal and the X2 pin is floated.
4
RCLR
Active-Low RAM Clear Input. If enabled by software, taking
RCLR
low will result in the clearing of the 114 bytes of user RAM. When
enabled,
RCLR can be activated whether or not VCC is present.
5–12
AD0–AD7
Multiplexed Address/Data Bus. Multiplexed buses save pins because
address information and data information time-share the same signal
paths. The addresses are present during the first portion of the bus
cycle and the same pins and signal paths are used for data in the
second portion of the cycle. Address/data multiplexing does not slow
the access time of the DS1689 since the bus change from address to
data occurs during the internal RAM access time. Addresses must be
valid prior to the latter portion of ALE, at which time the
DS1689/DS1693 latches the address. Valid write data must be
present and held stable during the latter portion of the
WR pulse. In a
read cycle, the DS1689/
DS1693 outputs 8 bits of data during the latter portion of the
RD
pulse. The read cycle is terminated and the bus returns to a high
impedance state as
RD transitions high. The address/data bus also
serves as a bidirectional data path for the external extended RAM.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1693+ | 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 |
| DS1697N WAF | 制造商:Texas Instruments 功能描述: |
| DS1699-010 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:ELECTRONIC DIGITAL RHEOSTAT |
| DS1699-10 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:ELECTRONIC DIGITAL RHEOSTAT |
| DS1699-100 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:ELECTRONIC DIGITAL RHEOSTAT |
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