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參數(shù)資料
| 型號： | 74LCX540WMX |
| 廠商： | Fairchild Semiconductor |
| 文件頁數(shù)： | 4/14頁 |
| 文件大小： | 0K |
| 描述： | IC INVERTER 8-INPUT 20SOIC |
| 標準包裝： | 1,000 |
| 系列： | 74LCX |
| 邏輯類型： | 逆變器，緩沖器 |
| 電路數(shù)： | 1 |
| 輸入數(shù)： | 8 |
| 特點： | 三態(tài) |
| 電源電壓： | 2 V ~ 3.6 V |
| 電流 - 靜態(tài)（最大值）： | 10µA |
| 輸出電流高，低： | 24mA，24mA |
| 邏輯電平 - 低： | 0.7 V ~ 0.8 V |
| 邏輯電平 - 高： | 1.7 V ~ 2 V |
| 額定電壓和最大 CL 時的最大傳播延遲： | 6.5ns @ 3.3V，50pF |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 供應商設備封裝： | 20-SOIC |
| 封裝/外殼： | 20-SOIC（0.295"，7.50mm 寬） |
| 包裝： | 帶卷 (TR) |
2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAB1200 Rev 1.2.7
12
FAB
12
00
—
Ground
-Re
ferenc
ed
Class
-G
He
adp
hone
Ampli
fi
er
wi
th
I
n
tegrated
Buck
Co
nvert
er
Writing
All writes must be preceded by a pointer set, even if the
pointer is already pointing to the desired register.
Immediately following the pointer set, the master must
begin
transmitting
the
data
to
be
written.
After
transmitting each byte of data, the master must release
the SDA line for one clock cycle to allow the FAB1200 to
acknowledge receiving the byte. The write operation
should be terminated by a STOP condition from the
master (see Figure 21).
As with reading, the master can write multiple bytes by
continuing to send data. The FAB1200 increments the
pointer by ones and accept data for the next register.
The master indicates the last data byte by issuing a
STOP condition.
SDA
SCL
D3
D7
D6
D5
D4
D2
D1
D0
A3
A7
A6
A5
A4
A2
A1
ACK
NACK
R/W
Slave Address
(from Master)
Data
(from Slave)
ACK
(from Slave)
NACK
(from Master)
START
(from Master)
STOP
(from Master)
Figure 19. I
2C Read
SDA
SCL
D3
D7
D6
D5
D4
D2
D1
D0
A3
A7
A6
A5
A4
A2
A1
ACK
R/W
Slave Address
(from Master)
Data
(from Slave)
ACK
(from Slave)
ACK
(from Master)
D3
D7
D6
D5
D4
D2
D1
D0
ACK
NACK
Data
(from Slave)
NACK
(from Master)
STOP
(from Master)
START
(from Master)
Figure 20. I
2C Multiple-Byte Read
P3
P7
P6
P5
P4
P2
P1
P0
A3
A7
A6
A5
A4
A2
A1
R/W
ACK
SDA
SCL
ACK
(from Slave)
Slave Address
(from Master)
Pointer
(from Master)
D3
D7
D6
D5
D4
D2
D1
D0
ACK
Data
(from Master)
ACK
(from Slave)
ACK
(from Slave)
STOP
(from Master)
START
(from Master)
Figure 21. I
2C Write
P3
P7
P6
P5
P4
P2
P1
P0
A3
A7
A6
A5
A4
A2
A1
R/W
ACK
SDA
SCL
ACK
(from Slave)
Slave Address
(from Master)
Pointer
(from Master)
A7
A6
A5
A4
Slave Address
(from Master)
ACK
(from Slave)
Repeat START
(from Master)
D3
D7
D6
D5
D4
D2
D1
D0
A3
A2
A1
ACK
NACK
R/W
Slave Address
(from Master)
Data
(from Slave)
ACK
(from Slave)
NACK
(from Master)
START
(from Master)
STOP
(from Master)
Figure 22. I
2C Write Followed by Read
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