參數(shù)資料
型號(hào): X9118TV14I
廠商: INTERSIL CORP
元件分類(lèi): 數(shù)字電位計(jì)
英文描述: Dual Suply/Low Power/1024-Tap/2-Wire Bus
中文描述: 100K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 1024 POSITIONS, PDSO14
封裝: PLASTIC, MO-153AC, TSSOP-14
文件頁(yè)數(shù): 3/20頁(yè)
文件大?。?/td> 348K
代理商: X9118TV14I
3
FN8161.1
March 25, 2005
PIN CONFIGURATION
PIN DESCRIPTIONS
Bus Interface Pins
S
ERIAL
D
ATA
I
NPUT
/O
UTPUT
(SDA)
The SDA is a bidirectional serial data input/output pin
for a 2-wire slave device and is used to transfer data
into and out of the device. It receives device address,
opcode, wiper register address and data sent from an
2-wire master at the rising edge of the serial clock
SCL, and it shifts out data after each falling edge of the
serial clock SCL.
It is an open drain output and may be wire-ORed with
any number of open drain or open collector outputs.
An open drain output requires the use of a pull-up
resistor. For selecting typical values, refer to the
guidelines for calculating typical values on the bus
pull-up resistors graph.
S
ERIAL
C
LOCK
(SCL)
This input is used by 2-wire master to supply 2-wire
serial clock to the X9118.
D
EVICE
A
DDRESS
(A1–A0
)
The address inputs are used to set the least significant
2 bits of the 8-bit slave address. A match in the slave
address serial data stream must be made with the
Address input in order to initiate communication with
the X9118. A maximum of 4 XDCP devices may
occupy the 2-wire serial bus.
H
ARDWARE
W
RITE
P
ROTECT
I
NPUT
(WP)
The WP pin when LOW prevents nonvolatile writes to
the Data Registers.
Potentiometer Pins
R
H
, R
L
The R
H
and R
L
pins are equivalent to the terminal
connections on a mechanical potentiometer.
R
W
The wiper pin is equivalent to the wiper terminal of a
mechanical potentiometer.
Bias Supply Pins
S
YSTEM
S
UPPLY
V
OLTAGE
(V
CC
)
AND
S
UPPLY
G
ROUND
(V
SS
)
The V
CC
pin is the system or digital supply voltage.
The V
SS
pin is the system ground.
A
NALOG
S
UPPLY
V
OLTAGES
(V+
AND
V
-
)
These supplies are the analog voltage supplies for the
potentiometer. The V+ supply is tied to the wiper
switches while the V- supply is used to bias the
switches and the internal P+ substrate of the
integrated circuit. Both of these supplies set the
voltage limits of the potentiometer.
Other Pins
N
O
C
ONNECT
No connect pins should be left open. These pins are
used for Intersil manufacturing and testing purposes.
PIN ASSIGNMENTS
PIN
(TSSOP) SYMBOL
FUNCTION
1
V+
Analog Supply Voltage
2
NC
No Connect
3
A0
Device Address for 2-wire bus
4
SCL
Serial Clock for 2-wire bus
5
WP
Hardware Write Protect
6
SDA
Serial Data Input/Output for 2-wire
bus
7
V
SS
V
-
System Ground
8
Analog Supply Voltage
9
A1
Device Address for 2-wire bus
10
NC
No Connect
11
R
W
R
H
R
L
V
CC
Wiper terminal of the Potentiometer
12
High terminal of the Potentiometer
13
Low terminal of the Potentiometer
14
System Supply Voltage
V
CC
R
L
R
H
V
SS
1
2
3
4
5
6
7
8
14
13
12
11
10
9
A0
R
W
NC
SCL
WP
A1
V-
TSSOP
X9118
NC
V+
SDA
X9118
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