CAT5273 Datasheet, PDF (12/14 Pages) ON Semiconductor – Dual 256‐position I2C Compatible Digital Potentiometers (POTs)

CAT5271, CAT5273
Table 12. CAT5273 Write
S 0 1 0 1 1 AD1 AD0 W A A0 SD X X X X X X A D7 D6 D5 D4 D3 D2 D1 D0 A P
Slave Address Byte
Instruction Byte
Data Byte
SDA
0 1 0 1 1 AD1 AD0 R/W A0 SD X X X X X X
D7 D6 D5 D4 D3 D2 D1 D0
S
T
A
R
T
A
C
K
Slave Address Byte
A
C
K
Instruction Byte
Data Byte
AS
CT
KO
P
Table 13. CAT5273 READ
S
0 1 0 1 1 AD1 AD0 R A D7
D6
D5
D4
D3
D2
D1
D0
A
P
Slave Address Byte
Data Byte
SDA
S
T
A
R
T
Legend
S=
P=
A=
D=
R=
W=
A0 =
0 1 0 1 1 AD1 AD0 R/W
D7
D6 D5
D4 D3
D2
D1
D0
A
C
K
Slave Address Byte
Data Byte
N
S
A
T
C
O
K
P
Start
Stop
Acknowledge
Data bit
Read (bit is 1 for Read instruction)
Write (bit is 0 for Write instruction)
Potentiometer Channel (1 or 2) Select Bit
SD =
X=
AD1, AD0 =
Shut Down:
0: normal operation
1: wiper is parked at B terminal
and terminal A is open circuit.
Don’t Care
Bits that must match the logic levels
on pins AD1 and AD0
Table 14. ORDERING PART NUMBER
Part Number
Resistance
Package
Lead Finish
Shipping^†
CAT5271ZI−50−GT3
CAT5271ZI−00−GT3
50 kW
100 kW
MSOP−10
NiPdAu
3000 / Tape & Reel
3000 / Tape & Reel
CAT5273ZI−50−GT3
50 kW
MSOP−10
NiPdAu
3000 / Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
13. For detailed information and a breakdown of device nomenclature and numbering systems, please see the ON Semiconductor Device
Nomenclature document, TND310/D, available at www.onsemi.com.
14. All packages are RoHS-compliant (Lead-free, Halogen-free).
http://onsemi.com
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