Datasheet > DS1855E-050/R

DS1855E-050/R

更新时间： 2024-01-19 22:22:17

品牌	Logo	应用领域
达拉斯 - DALLAS		电位器存储
页数	文件大小	规格书
20页	252K
描述
Dual Nonvolatile Digital Potentiometer and Secure Memory

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技术参数
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DS1855E-050/R 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	TSSOP
包装说明：	TSSOP, TSSOP14,.25	针数：	14
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.35
其他特性：	NONVOLATILE MEMORY; OTHER RESISTOR VALUE IS 10000 OHM WITH 100 TAP POSITION	标称带宽：	1 kHz
控制接口：	2-WIRE SERIAL	转换器类型：	DIGITAL POTENTIOMETER
JESD-30 代码：	R-PDSO-G14	JESD-609代码：	e3
长度：	5 mm	湿度敏感等级：	1
功能数量：	2	位置数：	256
端子数量：	14	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	TSSOP	封装等效代码：	TSSOP14,.25
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：	260	电源：	3/5 V
认证状态：	Not Qualified	电阻定律：	LINEAR
最大电阻容差：	20%	最大电阻器端电压：	3.3 V
最小电阻器端电压：	-0.3 V	座面最大高度：	1.1 mm
子类别：	Digital Potentiometers	标称供电电压：	3 V
表面贴装：	YES	标称温度系数：	750 ppm/ °C
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	0.65 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	30
标称总电阻：	50000 Ω	宽度：	4.4 mm
Base Number Matches：	1

DS1855E-050/R 数据手册

DS1855

2-WIRE OPERATION

Clock and Data Transitions

The SDA pin is normally pulled high with an external resistor or device. Data on the SDA pin may only

change during SCL low time periods. Data changes during SCL high periods will indicate a START or

STOP conditions depending on the conditions discussed below. Refer to the timing diagram in Figure 2

for further details.

START Condition

A high-to-low transition of SDA with SCL high is a START condition that must precede any other

command. Refer to the timing diagram in Figure 2 for further details.

STOP Condition

A low-to-high transition of SDA with SCL high is a STOP condition. After a read sequence, the stop

command places the DS1855 into a low-power mode. Refer to the timing diagram in Figure 2 for further

details.

Acknowledge

All address and data bytes are transmitted via a serial protocol. The DS1855 pulls the SDA line low

during the ninth clock pulse to acknowledge that it has received each word.

Standby Mode

The DS1855 features a low-power mode that is automatically enabled after power-on, after a STOP

command, and after the completion of all internal operations.

2-Wire Interface Reset

After any interruption in protocol, power loss, or system reset, the following steps reset the DS1855:

1. Clock up to nine cycles.

2. Look for SDA high in each cycle while SCL is high.

3. Create a START condition while SDA is high.

Device Addressing

The DS1855 must receive an 8-bit device address word following a START condition to enable a specific

device for a read or write operation. The address word is clocked into the DS1855 MSB to LSB. The

address word consists of Ah (1010) followed by A2, A1, and A0 then the read/write (R/W) bit. If the

R/W bit is high, a read operation is initiated. If the R/W is low, a write operation is initiated. For a device

to become active, the values of A2, A1, and A0 must be the same as the hard-wired address pins on the

DS1855. Upon a match of written and hard-wired addresses, the DS1855 will output a zero for one clock

cycle as an acknowledge. If the address does not match, the DS1855 returns to a low-power mode.

Write Operations

After receiving a matching address byte with the R/W bit set low, the device goes into the write mode of

operation. The master must transmit an 8-bit EEPROM memory address to the device to define the

address where the data is to be written. After the reception of this byte, the DS1855 will transmit a zero

for one clock cycle to acknowledge the receipt of the address. The master must then transmit an 8-bit data

word to be written into this address. The DS1855 will again transmit a zero for one clock cycle to

acknowledge the receipt of the data. At this point, the master must terminate the write operation with a

STOP condition. The DS1855 then enters an internally timed write process T_wto the EEPROM memory.

All inputs are disabled during this byte write cycle.

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与DS1855E-050/R相关器件

型号	品牌	描述	获取价格	数据表
DS1855E-050/T	DALLAS	Dual Nonvolatile Digital Potentiometer and Secure Memory	获取价格
DS1855E-050/T&R	MAXIM	Digital Potentiometer, 2 Func, 50000ohm, 2-wire Serial Control Interface, 256 Positions, P	获取价格
DS1855E-050/T&R	DALLAS	Dual Nonvolatile Digital Potentiometer and Secure Memory	获取价格
DS1855E-100	DALLAS	Dual Nonvolatile Digital Potentiometer and Secure Memory	获取价格
DS1855E-100/R	DALLAS	Dual Nonvolatile Digital Potentiometer and Secure Memory	获取价格
DS1855E-100/T	DALLAS	Dual Nonvolatile Digital Potentiometer and Secure Memory	获取价格

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