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參數(shù)資料
| 型號(hào)： | DS28CM00R-A00+T |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 8/9頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC SILICON SERIAL NUMBER SOT23-5 |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類型： | 硅序列號(hào) |
| 應(yīng)用： | PCB，網(wǎng)絡(luò)節(jié)點(diǎn)，設(shè)備識(shí)別/注冊(cè) |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | SC-74A，SOT-753 |
| 供應(yīng)商設(shè)備封裝： | SOT-23-5 |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 其它名稱： | DS28CM00R-A00+TDKR |
DS28CM00: IC/SMBus Silicon Serial Number
8 of 9
IC Communication
Legend
SYMBOL
DESCRIPTION
SYMBOL
DESCRIPTION
S
START Condition
A
Acknowledged
AD,0
Select DS28CM00 for Write Access
A\
Not Acknowledged
AD,1
Select DS28CM00 for Read Access
<byte>
Transfer of One Byte
Sr
Repeated START Condition
VMA
Valid Memory Address (00h to 08h)
P
STOP Condition
IMA
Invalid Memory Address
Command-Specific Communication
Color-Codes
Master-to-Slave
Slave-to-Master
Communication Examples
Write to Control Register (address 08)
S
AD,0
A
08h
A
<byte>
A
P
Write to ROM Address (excludes address 08)
S
AD,0
A
VMA
A
<byte>
A\
P
Write to invalid address (>08)
S
AD,0
A
IMA
A\
P
Read
S
AD,0
A
VMA
A
Sr
AD,1
A
<byte>
A
<byte>
A\
P
Application Information
SDA and SCL Pullup Resistors
SDA is an open-drain output on the DS28CM00 that requires a pullup resistor (Figure 6) to realize high logic levels.
Because the DS28CM00 uses SCL only as input (no clock stretching) the master can drive SCL either through an
open-drain/collector output with a pullup resistor or a push-pull output.
Pullup Resistor RP Sizing
According to the IC specification, a slave device must be able to sink at least 3mA at a VOL of 0.4V. The SMBus
specification requires a current sink capability of 4mA at 0.4V. The DS28CM00 can sink at least 4mA at 0.4V VOL
over its entire operating voltage range. This DC characteristic determines the minimum value of the pullup resistor:
Rpmin = (VCC - 0.4V)/4mA. With a maximum operating voltage of 5.25V, the minimum value for the pullup resistor
is 1.2k
Ω. The "Minimum RP" line in Figure 7 shows how the minimum pullup resistor changes with the operating
(pullup) voltage.
last byte
one or
more bytes
data is not accepted
address is not accepted
Set address pointer
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