CAT5269_13 Datasheet, PDF (1/15 Pages) ON Semiconductor – Dual Digital Potentiometer (POT)

CAT5269
Dual Digital
Potentiometer (POT)
with 256 Taps
and 2‐wire Interface
Description
The CAT5269 is two digital POTs integrated with control logic and
18 bytes of NVRAM memory. Each digital POT consists of a series of
resistive elements connected between two externally accessible end
points. The tap points between each resistive element are connected to
the wiper outputs with CMOS switches. A separate 8-bit control
register (WCR) independently controls the wiper tap switches for each
digital POT. Associated with each wiper control register are four 8-bit
non-volatile memory data registers (DR) used for storing up to four
wiper settings. Writing to the wiper control register or any of the
non-volatile data registers is via a 2-wire serial bus. On power-up, the
contents of the first data register (DR0) for each of the potentiometers
is automatically loaded into its respective wiper control registers.
The CAT5269 can be used as a potentiometer or as a two terminal,
variable resistor. It is intended for circuit level or system level
adjustments in a wide variety of applications. It is available in the
−40C to 85C industrial operating temperature range and offered in a
24-lead SOIC and TSSOP package.
Features
 Four Linear Taper Digital Potentiometers
 256 Resistor Taps per Potentiometer
 End to End Resistance 50 kW or 100 kW
 Potentiometer Control and Memory Access via 2-wire Interface
(I²C like)
 Low Wiper Resistance, Typically 100 W
 Nonvolatile Memory Storage for up to Four Wiper Settings for Each
Potentiometer
 Automatic Recall of Saved Wiper Settings at Power Up
 2.5 to 6.0 Volt Operation
 Standby Current less than 1 mA
 1,000,000 Nonvolatile WRITE Cycles
 100 Year Nonvolatile Memory Data Retention
 24-lead SOIC and TSSOP Packages
 Industrial Temperature Range
 These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS
Compliant
http://onsemi.com
TSSOP−24
Y SUFFIX
CASE 948AR
SOIC−24
W SUFFIX
CASE 751BK
PIN CONNECTIONS
NC
A0
NC
NC
NC
NC
V_CC
R_L0
R_H0
R_W0
A2
WP
1
CAT5269
SOIC−24 (W)
TSSOP−24 (Y)
(Top View)
A3
SCL
NC
NC
NC
NC
GND
R_W1
R_H1
R_L1
A1
SDA
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
 Semiconductor Components Industries, LLC, 2013
1
July, 2013 − Rev. 7
Publication Order Number:
CAT5269/D