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參數(shù)資料
| 型號： | X9409WS24T1 |
| 廠商： | Intersil |
| 文件頁數(shù)： | 14/20頁 |
| 文件大小： | 0K |
| 描述： | IC XDCP QUAD 64-TAP 10K 24-SOIC |
| 標準包裝： | 1,000 |
| 系列： | XDCP™ |
| 接片： | 64 |
| 電阻（歐姆）： | 10k |
| 電路數(shù)： | 4 |
| 溫度系數(shù)： | 標準值 ±300 ppm/°C |
| 存儲器類型： | 非易失 |
| 接口： | I²C（設(shè)備位址） |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-SOIC |
| 包裝： | 帶卷 (TR) |
3
FN8192.4
October 12, 2006
PIN CONFIGURATION
PRINCIPLES OF OPERATION
The X9409 is a highly integrated microcircuit
incorporating four resistor arrays and their associated
registers and counters and the serial interface logic
providing direct communication between the host and
the XDCP potentiometers.
Serial Interface
The X9409 supports a bidirectional bus oriented
protocol. The protocol defines any device that sends
data onto the bus as a transmitter and the receiving
device as the receiver. The device controlling the
transfer is a master and the device being controlled is
the slave. The master will always initiate data transfers
and provide the clock for both transmit and receive
operations. Therefore, the X9409 will be considered a
slave device in all applications.
Clock and Data Conventions
Data states on the SDA line can change only during
SCL LOW periods (tLOW). SDA state changes during
SCL HIGH are reserved for indicating start and stop
conditions.
Start Condition
All commands to the X9409 are preceded by the start
condition, which is a HIGH to LOW transition of SDA
while SCL is HIGH (tHIGH). The X9409 continuously
monitors the SDA and SCL lines for the start condition
and will not respond to any command until this
condition is met.
Stop Condition
All communications must be terminated by a stop
condition, which is a LOW to HIGH transition of SDA
while SCL is HIGH.
Acknowledge
Acknowledge is a software convention used to provide
a positive handshake between the master and slave
devices on the bus to indicate the successful receipt of
data. The transmitting device, either the master or the
slave, will release the SDA bus after transmitting eight
bits. The master generates a ninth clock cycle and
during this period the receiver pulls the SDA line LOW
to acknowledge that it successfully received the eight
bits of data.
The X9409 will respond with an acknowledge after
recognition of a start condition and its slave address
and once again after successful receipt of the
command byte. If the command is followed by a data
byte the X9409 will respond with a final acknowledge.
Array Description
The X9409 is comprised of four resistor arrays. Each
array contains 63 discrete resistive segments that are
connected in series. The physical ends of each array
are equivalent to the fixed terminals of a mechanical
potentiometer (VH/RH and VL/RL inputs).
At both ends of each array and between each resistor
segment is a CMOS switch connected to the wiper
(VW/RW) output. Within each individual array only one
switch may be turned on at a time. These switches are
VCC
VL0/RL0
VH0/RH0
WP
SDA
A1
1
2
3
4
5
6
7
8
9
10
24
23
22
21
20
19
18
17
16
15
NC
VL3/RL3
VH3/RH3
VW3/RW3
A0
NC
A3
SCL
VL2/RL2
VH2/RH2
SOIC
X9409
V
SS
VW0/RW0
14
13
11
12
A2
VL1/RL1
VH1/RH1
VW1/RW1
VW2/RW2
NC
SDA
A1
VH2/RH2
1
2
3
4
5
6
7
8
9
10
24
23
22
21
20
19
18
17
16
15
WP
A2
VW0/RW0
VCC
NC
VL3/RL3
VH3/RH3
VW3/RW3
TSSOP
X9409
VW2/RW2
14
13
11
12
A3
VL1/RL1
VH1/RH1
VW1/RW1
A0
NC
VH0/RH0
NC
SCL
VL2/RL2
VL0/RL0
VSS
X9409
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