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85C72I/J

更新时间： 2024-02-18 07:57:24

品牌	Logo	应用领域
美国微芯 - MICROCHIP		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
8页	107K
描述
128 X 8 I2C/2-WIRE SERIAL EEPROM, CDIP8, 0.300 INCH, CERDIP-8

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技术参数
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85C72I/J 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Obsolete	零件包装代码：	SOIC
包装说明：	0.207 INCH, PLASTIC, SOIC-8	针数：	8
Reach Compliance Code：	unknown	风险等级：	5.87
其他特性：	100K ERASE/WRITE CYCLES MIN; DATA RETENTION > 40 YEARS	最大时钟频率 (fCLK)：	0.1 MHz
数据保留时间-最小值：	200	耐久性：	1000000 Write/Erase Cycles
I2C控制字节：	1010DDDR	JESD-30 代码：	R-PDSO-G8
JESD-609代码：	e0	长度：	5.28 mm
内存密度：	1024 bit	内存集成电路类型：	EEPROM
内存宽度：	8	功能数量：	1
端子数量：	8	字数：	128 words
字数代码：	128	工作模式：	SYNCHRONOUS
最高工作温度：	85 °C	最低工作温度：	-40 °C
组织：	128X8	输出特性：	OPEN-DRAIN
封装主体材料：	PLASTIC/EPOXY	封装代码：	SOP
封装等效代码：	SOP8,.3	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	并行/串行：	SERIAL
峰值回流温度（摄氏度）：	NOT SPECIFIED	电源：	5 V
认证状态：	Not Qualified	座面最大高度：	2.03 mm
串行总线类型：	I2C	最大待机电流：	0.0001 A
子类别：	EEPROMs	最大压摆率：	0.00425 mA
最大供电电压 (Vsup)：	5.5 V	最小供电电压 (Vsup)：	4.5 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：	Tin/Lead (Sn/Pb)	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	5.207 mm
最长写入周期时间 (tWC)：	1 ms	Base Number Matches：	1

85C72I/J 数据手册

85C72/82/92

7.0

ACKNOWLEDGE POLLING

8.0

READ MODE

Since the device will not acknowledge during a write

cycle, this can be used to determine when the cycle is

complete (this feature can be used to maximize bus

throughput). Once the stop condition for a write com-

mand has been issued from the master, the device ini-

tiates the internally timed write cycle. ACK polling can

be initiated immediately. This involves the master

sending a start condition followed by the control byte

for a write command (R/W = 0). If the device is still

busy with the write cycle, then no ACK will be returned.

If the cycle is complete, then the device will return the

ACK and the master can then proceed with the next

read or write command. See Figure 7-1 for ﬂow dia-

gram.

This mode illustrates master device reading data from

the 85C72/82/92.

As can be seen from Figure 8-1, the master ﬁrst sets up

the slave and word addresses by doing a write.

Note: Although this is a read mode, the address

pointer must be written to.

During this period the 85C72/82/92 generates the nec-

essary acknowledge bits as deﬁned in the appropriate

section.

The master now generates another START condition

and transmits the slave address again, except this time

the read/write bit is set into the read mode. After the

slave generates the acknowledge bit, it then outputs

the data from the addressed location on to the SDA pin,

increments the address pointer and, if it receives an

acknowledge from the master, will transmit the next

consecutive byte. This autoincrement sequence is

only aborted when the master sends a STOP condition

instead of an acknowledge.

FIGURE 7-1: ACKNOWLEDGE POLLING

FLOW

Send

Write Command

Send Stop

Condition to

Initiate Write Cycle

Note 1: If the master knows where the address

pointer is, it can begin the read sequence

at point ‘R’ indicated on Figure 8-1 and

save time transmitting the slave and word

addresses.

Send Start

Note 2: In all modes, the address pointer will auto-

matically increment from the end of the

memory block (256 byte) back to the ﬁrst

location in that block.

Send Control Byte

with R/W = 0

Did Device

Acknowledge

(ACK = 0)?

Yes

Operation

FIGURE 8-1: READ MODE

ACKNOWLEDGES FROM MASTER RECEIVER

LAST

ACKNOWLEDGES FROM SLAVE RECEIVER

SLAVE

ADDRESS

SLAVE

START

0 A WORD ADDRESS A START

1 A

STOP

DATA BYTE 1

DATA BYTE

ADDRESS

R/W

AUTO INCREMENT

WORD ADDRESS

DS11182C-page 6

1995 Microchip Technology Inc.

1...3 4 567 8

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与85C72I/J相关器件

型号	品牌	描述	获取价格	数据表
85C72-I/J	ETC	I2C Serial EEPROM	获取价格
85C72-I/P	MICROCHIP	128 X 8 I2C/2-WIRE SERIAL EEPROM, PDIP8, 0.300 INCH, PLASTIC, DIP-8	获取价格
85C72I/SM	MICROCHIP	128 X 8 I2C/2-WIRE SERIAL EEPROM, PDSO8, 0.207 INCH, PLASTIC, SOIC-8	获取价格
85C72-I/SM	ETC	I2C Serial EEPROM	获取价格
85C72I/SN	ETC	I2C Serial EEPROM	获取价格
85C72-I/SO	MICROCHIP	IC,SERIAL EEPROM,128X8,CMOS,SOP,8PIN,PLASTIC	获取价格

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