X9258US24IZ-2.7 Intersil, X9258US24IZ-2.7 Datasheet - Page 3

• Manufacturer Part Number: X9258US24IZ-2.7
• Description: IC XDCP QUAD 256TP 50K 24-SOIC
• Manufacturer: Intersil
• Series: XDCP™r

Specifications of X9258US24IZ-2.7

• Taps: 256
• Resistance (ohms): 50K
• Number Of Circuits: 4
• Temperature Coefficient: 300 ppm/°C Typical
• Memory Type: Non-Volatile
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)
• Resistance In Ohms: 50K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Pinout
Pin Descriptions
Host Interface Pins
SERIAL CLOCK (SCL)
The SCL input is used to clock data into and out of the
X9258.
SERIAL DATA (SDA)
SDA is a bidirectional pin used to transfer data into and out
of the device. 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 “Guidelines for
Calculating Typical Values of Bus Pull-Up Resistors” on
page 10.
DEVICE ADDRESS (A
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 X9258. A maximum
of 16 devices may occupy the 2-wire serial bus.
Potentiometer Pins
V
The V
connections on either end of a mechanical potentiometer.
V
The wiper outputs are equivalent to the wiper output of a
mechanical potentiometer.
Hardware Write Protect Input (WP)
The WP pin when low prevents nonvolatile writes to the Data
Registers.
H
W
/R
/R
H
W
H
(V
/R
(V
H0
H
W0
and V
/R
/R
H0
W0
- V
L
/R
- V
H3
L
W3
inputs are equivalent to the terminal
0
/R
- A
/R
H3
W3
3
), V
)
3
)
L
/R
L
(V
L0
/R
L0
V
V
V
V
V
V
W3
W0
H3
H0
L3
L0
- V
/R
/R
/R
/R
/R
/R
V
WP
NC
L3
W3
W0
A0
CC
A2
V+
H3
H0
L3
L0
/R
L3
(24 LD SOIC, TSSOP)
)
10
11
12
1
2
3
4
5
6
7
8
9
TOP VIEW
X9258
X9258
X9258
Analog Supplies V+, V-
The Analog Supplies V+, V- are the supply voltages for the
DCP analog section.
Pin Names
Principles Of Operation
The X9258 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 DCP
potentiometers.
Serial Interface (2-Wire)
The X9258 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
24
23
22
21
20
19
18
17
16
15
14
13
V
V
V
W0
H0
L0
/R
/R
/R
A3
SCL
V
V
V
V–
V
V
V
V
A1
SDA
W0
H0
A0 thru A3
SYMBOL
L0
L2
H2
W2
SS
W1
H1
L1
V+, V-
/R
/R
/R
/R
SDA
thru V
SCL
V
V
/R
/R
thru V
thru V
WP
NC
CC
L2
L1
SS
H2
H1
W2
W1
H3
L3
W3
/R
/R
/R
H3
L3
W3
,
Serial Clock
Serial Data
Device Address
Potentiometer Pins
(terminal equivalent)
Potentiometers Pins
(wiper equivalent)
Hardware Write Protection
Analog Supplies
System Supply Voltage
System Ground
No Connection (Allowed)
DESCRIPTION
April 14, 2011
FN8168.5