CAT5261YI-00 ON Semiconductor, CAT5261YI-00 Datasheet - Page 3

• Manufacturer Part Number: CAT5261YI-00
• Manufacturer: ON Semiconductor

Specifications of CAT5261YI-00

• Number Of Elements: 2
• # Of Taps: 256
• Resistance (max): 100KOhm
• Power Supply Requirement: Single
• Interface Type: Serial (SPI)
• Single Supply Voltage (typ): 3.3/5V
• Dual Supply Voltage (typ): Not RequiredV
• Single Supply Voltage (min): 2.5V
• Single Supply Voltage (max): 6V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 24
• Package Type: TSSOP
• Lead Free Status / Rohs Status: Compliant

SERIAL BUS PROTOCOL
The CAT5261 supports the SPI bus data transmission
protocol. The synchronous Serial Peripheral Interface
(SPI) helps the CAT5261 to interface directly with
many
DEVICE OPERATION
The CAT5261 is two resistor arrays integrated with an
SPI serial interface logic, two 8-bit wiper control
registers and eight 8-bit, non-volatile memory data
registers. Each resistor array contains 255 separate
resistive elements connected in series. The physical
ends of each array are equivalent to the fixed
terminals of a mechanical potentiometer (R
R
The tap positions between and at the ends of the
series resistors are connected to the output wiper
terminals (R
¯¯¯ going low the first byte will be received. The part
is accessed via the SI pin, with data being clocked in
on the rising edge of SCK. The first byte contains one
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
CS
H
and R
of
L
are symmetrical and may be interchanged.
today's
W
) by a After the device is selected with
popular
microcontrollers.
H
and R
The
L
).
3
CAT5261 contains an 8-bit instruction register .The
instruction set and the operation codes are detailed in
the instruction set table 3 on page 9.
of the six op-codes that define the operation to be
performed.
CMOS transistor switch. Only one tap point for each
potentiometer is connected to its wiper terminal at a
time and is determined by the value of the wiper
control register. Data can be read or written to the
wiper control registers or the non-volatile memory
data registers via the SPI bus. Additional instructions
allows data to be transferred between the wiper
control registers and each respective potentiometer's
non-volatile data registers. Also, the device can be
instructed to operate in an "increment/decrement"
mode.
Doc. No. MD-2122 Rev. G
CAT5261