CAT5401_13 Datasheet, PDF (1/15 Pages) ON Semiconductor – Quad Digital Potentiometer (POT)

CAT5401
Quad Digital
Potentiometer (POT)
with 64 Taps
and SPI Interface
Description
The CAT5401 is four digital POTs integrated with control logic and
16 bytes of NVRAM memory. Each digital POT consists of a series of
63 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 6-bit control
register (WCR) independently controls the wiper tap switches for each
digital POT. Associated with each wiper control register are four 6-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 CAT5401 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.
Features
 Four Linear Taper Digital Potentiometers
 64 Resistor Taps per Potentiometer
 End to End Resistance 2.5 kW, 10 kW, 50 kW or 100 kW
 Potentiometer Control and Memory Access via SPI Interface:
Mode (0, 0) and (1, 1)
 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 24-lead TSSOP
 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
V_CC
R_L0
R_H0
R_W0
CS
WP
SI
A₁
R_L1
R_H1
R_W1
GND
1
CAT5401
SOIC−24 (W)
(Top View)
NC
R_L3
R_H3
R_W3
A₀
SO
HOLD
SCK
R_L2
R_H2
R_W2
NC
SI
A₁
R_L1
R_H1
R_W1
GND
NC
R_W2
R_H2
R_L2
SCK
HOLD
1
CAT5401
TSSOP−24 (Y)
(Top View)
WP
CS
R_W0
R_H0
R_L0
V_CC
NC
R_L3
R_H3
R_W3
A₀
SO
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. 11
Publication Order Number:
CAT5401/D