CAT5221W-10 ON Semiconductor, CAT5221W-10 Datasheet - Page 2

• Manufacturer Part Number: CAT5221W-10
• Manufacturer: ON Semiconductor

Specifications of CAT5221W-10

• Number Of Elements: 2
• # Of Taps: 64
• Resistance (max): 10KOhm
• Power Supply Requirement: Single
• Interface Type: Serial (2-Wire/I2C)
• 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: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 20
• Lead Free Status / RoHS Status: Compliant

The CAT5221 is two resistor arrays integrated with 2-
wire serial interface logic, two 6-bit wiper control registers
and eight 6-bit, non-volatile memory data registers.
Each resistor array contains 63 separate resistive
elements connected in series. The physical ends of
each array are equivalent to the fixed terminals of a
mechanical potentiometer (R
symmetrical and may be interchanged. The tap positions
between and at the ends of the series resistors are
connected to the output wiper terminals (R
Document No. 2113, Rev. G
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
GND
VCC
SDA
SCL
R
R
R
R
R
R
NC
NC
NC
NC
NC
NC
A0
A2
A3
A1
W0
W1
L0
H0
L1
H1
Wiper Terminal for Potentiometer 0
Low Reference Terminal for Potentiometer 0
High Reference Terminal for Potentiometer 0
Device Address, LSB
Device Address
Wiper Terminal for Potentiometer 1
Low Reference Terminal for Potentiometer 1
High Reference Terminal for Potentiometer 1
Serial Data Input/Output
Ground
No Connect
No Connect
No Connect
Bus Serial Clock
Device Address
Device Address
No Connect
No Connect
No Connect
Supply Voltage
H
and R
L
). R
H
and R
W
) by a
L
are
2
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 2-wire 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.
The CAT5221 serial clock input pin is used to clock
all data transfers into or out of the device.
The CAT5221 bidirectional serial data pin is used
to transfer data into and out of the device. The
SDA pin is an open drain output and can be wire-
Ored with the other open drain or open collector
outputs.
These inputs set the device address when ad-
dressing multiple devices. When these pins are left
floating the default values are zero. A total of
sixteen devices can be addressed on a single bus.
A match in the slave
address must be made with the address input in
order to initiate communication with the CAT5221.
The two sets of R
the terminal connections on a mechanical potenti-
ometer.
The two R
terminal of a mechanical potentiometer.
Serial Clock
Serial Data
Resistor End Points
Wiper
W
pins are equivalent to the wiper
H
Device Address Inputs
and R
L
pins are equivalent to