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參數(shù)資料
| 型號(hào)： | X9279UV14Z-2.7 |
| 廠商： | INTERSIL CORP |
| 元件分類： | 數(shù)字電位計(jì) |
| 英文描述： | EDN12 DB9 EMI/RFI FF 250F |
| 中文描述： | 50K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 256 POSITIONS, PDSO14 |
| 封裝： | 4.40 MM, ROHS COMPLIANT, PLASTIC, TSSOP-14 |
| 文件頁數(shù)： | 4/24頁 |
| 文件大?。?/td> | 398K |
| 代理商： | X9279UV14Z-2.7 |
X9279
Characteristics subject to change without notice.
4 of 24
REV 1.1.7 2/6/03
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 X9279.
D
EVICE
A
DDRESS
(A2 - A0)
The Address inputs are used to set the least significant
3 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 X9279. A maximum of 8 devices may occupy the 2-
Wire serial bus.
Potentiometer Pins
R
H
, R
L
The R
connections on a mechanical potentiometer.
H
and R
L
pins are equivalent to the terminal
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
pin
)
The V
is the system ground.
CC
pin is the system supply voltage. The V
SS
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.
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