Datasheet > 24LC08B-/P

24LC08B-/P

更新时间： 2024-01-05 06:06:15

品牌	Logo	应用领域
其他 - ETC		可编程只读存储器电动程控只读存储器电可擦编程只读存储器
页数	文件大小	规格书
12页	163K
描述
I2C Serial EEPROM

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技术参数
数据手册

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24LC08B-/P 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：	4.40 MM, ROHS COMPLIANT, PLASTIC, MO-153, TSSOP-8	针数：	8
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.32.00.51	风险等级：	5.17
Is Samacsys：	N	最大时钟频率 (fCLK)：	0.4 MHz
数据保留时间-最小值：	200	耐久性：	1000000 Write/Erase Cycles
I2C控制字节：	1010XMMR	JESD-30 代码：	R-PDSO-G8
JESD-609代码：	e3	长度：	4.4 mm
内存密度：	8192 bit	内存集成电路类型：	EEPROM
内存宽度：	8	湿度敏感等级：	1
功能数量：	1	端子数量：	8
字数：	1024 words	字数代码：	1000
工作模式：	SYNCHRONOUS	最高工作温度：	85 °C
最低工作温度：	-40 °C	组织：	1KX8
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装等效代码：	TSSOP8,.25	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	并行/串行：	SERIAL
峰值回流温度（摄氏度）：	260	电源：	3/5 V
认证状态：	Not Qualified	座面最大高度：	1.2 mm
串行总线类型：	I2C	最大待机电流：	0.000001 A
子类别：	EEPROMs	最大压摆率：	0.003 mA
最大供电电压 (Vsup)：	5.5 V	最小供电电压 (Vsup)：	2.5 V
标称供电电压 (Vsup)：	5 V	表面贴装：	YES
技术：	CMOS	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：	40	宽度：	3 mm
最长写入周期时间 (tWC)：	5 ms	写保护：	HARDWARE
Base Number Matches：	1

24LC08B-/P 数据手册

24LC04B/08B

3.4

Data Valid (D)

2.0

FUNCTIONAL DESCRIPTION

The 24LC04B/08B supports a Bi-directional 2-wire bus

and data transmission protocol. A device that sends

data onto the bus is deﬁned as transmitter, and a

device receiving data as receiver. The bus has to be

controlled by a master device which generates the

serial clock (SCL), controls the bus access, and gener-

ates the START and STOP conditions, while the

24LC04B/08B works as slave. Both, master and slave

can operate as transmitter or receiver but the master

device determines which mode is activated.

The state of the data line represents valid data when,

after a START condition, the data line is stable for the

duration of the HIGH period of the clock signal.

The data on the line must be changed during the LOW

period of the clock signal. There is one clock pulse per

bit of data.

Each data transfer is initiated with a START condition

and terminated with a STOP condition. The number of

the data bytes transferred between the START and

STOP conditions is determined by the master device

and is theoretically unlimited, although only the last 16

will be stored when doing a write operation. When an

overwrite does occur it will replace data in a ﬁrst in ﬁrst

out fashion.

3.0

BUS CHARACTERISTICS

The following bus protocol has been deﬁned:

• Data transfer may be initiated only when the bus

is not busy.

• During data transfer, the data line must remain

stable whenever the clock line is HIGH. Changes

in the data line while the clock line is HIGH will be

interpreted as a START or STOP condition.

3.5

Acknowledge

Each receiving device, when addressed, is obliged to

generate an acknowledge after the reception of each

byte. The master device must generate an extra clock

pulse which is associated with this acknowledge bit.

Accordingly, the following bus conditions have been

deﬁned (Figure 3-1).

Note: The 24LC04B/08B does not generate any

acknowledge bits if an internal program-

ming cycle is in progress.

3.1

Bus not Busy (A)

Both data and clock lines remain HIGH.

The device that acknowledges, has to pull down the

SDA line during the acknowledge clock pulse in such a

way that the SDA line is stable LOW during the HIGH

period of the acknowledge related clock pulse. Of

course, setup and hold times must be taken into

account. A master must signal an end of data to the

slave by not generating an acknowledge bit on the last

byte that has been clocked out of the slave. In this

case, the slave must leave the data line HIGH to enable

the master to generate the STOP condition.

3.2

Start Data Transfer (B)

A HIGH to LOW transition of the SDA line while the

clock (SCL) is HIGH determines a START condition.

All commands must be preceded by a START condi-

tion.

3.3

Stop Data Transfer (C)

A LOW to HIGH transition of the SDA line while the

clock (SCL) is HIGH determines a STOP condition. All

operations must be ended with a STOP condition.

FIGURE 3-1: DATA TRANSFER SEQUENCE ON THE SERIAL BUS

(A)

(B)

(D)

(C)

(A)

SCL

SDA

START

CONDITION

STOP

CONDITION

ADDRESS OR

ACKNOWLEDGE

VALID

DATA

ALLOWED

TO CHANGE

DS21051G-page 4

1999 Microchip Technology Inc.

1 2 345 6 7...12

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与24LC08B-/P相关器件

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24LC08B/P202	MICROCHIP	1K X 8 I2C/2-WIRE SERIAL EEPROM, PDIP8, 0.300 INCH, PLASTIC, DIP-8	获取价格
24LC08B/PA24	MICROCHIP	1K X 8 I2C/2-WIRE SERIAL EEPROM, PDIP8, 0.300 INCH, PLASTIC, DIP-8	获取价格
24LC08B/SL	MICROCHIP	1K X 8 I2C/2-WIRE SERIAL EEPROM, PDSO14, 0.150 INCH, PLASTIC, SOIC-14	获取价格
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24LC08B/SM	MICROCHIP	1K X 8 I2C/2-WIRE SERIAL EEPROM, PDSO8, 0.207 INCH, PLASTIC, SOIC-8	获取价格
24LC08B-/SM	ETC	I2C Serial EEPROM	获取价格

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