CAT5251_13 Datasheet, PDF (1/15 Pages) ON Semiconductor – Quad Digital Potentiometer (POT)

CAT5251
Quad Digital
Potentiometer (POT)
with 256 Taps
and SPI Interface
Description
The CAT5251 is four digital POTs integrated with control logic and
16 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 SPI serial bus. On power-up, the
contents of the first data register (DR0) for each of the four
potentiometers is automatically loaded into its respective wiper
control register.
The CAT5251 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
 254 Resistor Taps per Potentiometer
 End to End Resistance 50 kW or 100 kW
 Potentiometer Control and Memory Access via SPI Interface
 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
 SOIC 24-lead and TSSOP 24-lead
 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
SO
A0
R_W3
R_H3
R_L3
NC
V_CC
R_L0
R_H0
R_W0
CS
WP
1
CAT5251
SOIC−24 (W)
TSSOP−24 (Y)
(Top View)
HOLD
SCK
R_L2
R_H2
R_W2
NC
GND
R_W1
R_H1
R_L1
A1
SI
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. 9
Publication Order Number:
CAT5251/D