參數(shù)資料
型號: X9259US24I-2.7
廠商: INTERSIL CORP
元件分類: 數(shù)字電位計(jì)
英文描述: Single Supply/Low Power/256-Tap/2-Wire bus
中文描述: QUAD 50K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 256 POSITIONS, PDSO24
封裝: PLASTIC, MS-013AD, SOIC-24
文件頁數(shù): 4/25頁
文件大小: 400K
代理商: X9259US24I-2.7
X9259
Characteristics subject to change without notice.
4 of 25
REV 1.2.3 4/30/02
www.xicor.com
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 X9259.
D
EVICE
A
DDRESS
(A3–A0)
The Address inputs are used to set the least significant
4 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 X9259. A maximum of 16 devices may occupy the
2-Wire serial bus. Device pins A3-A0 must be tie to a
logic level which specify the external address of the
device, see figures 3, 4, and 5.
Potentiometer Pins
R
H
, R
L
The R
connections on a mechanical potentiometer. Since
there are 4 potentiometers, there are 4 sets of R
R
L
such that R
H0
and R
L0
are the terminals of POT 0
and so on.
H
and R
L
pins are equivalent to the terminal
H
and
R
W
The wiper pin are equivalent to the wiper terminal of a
mechanical
potentiometer.
potentiometers, there are 4 sets of R
W
such that R
W0
is the terminal of POT 0 and so on.
Since
there
are
4
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 supply voltage. The V
SS
pin
is the system ground.
Other Pins
N
O
C
ONNECT
No connect pins should be left open. This pins are used
for Xicor manufacturing and testing purposes.
H
ARDWARE
W
RITE
P
ROTECT
I
NPUT
(WP)
The WP pin when LOW prevents nonvolatile writes to
the Data Registers.
相關(guān)PDF資料
PDF描述
X9259US24IZ Single Supply/Low Power/256-Tap/2-Wire bus
X9259US24Z Single Supply/Low Power/256-Tap/2-Wire bus
X9259UV24 Single Supply/Low Power/256-Tap/2-Wire bus
X9259UV24-2.7 Single Supply/Low Power/256-Tap/2-Wire bus
X9259UV24I Single Supply/Low Power/256-Tap/2-Wire bus
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