CAT5419WI-25 Datasheet, PDF (1/16 Pages) ON Semiconductor – Dual Digitally Programmable Potentiometers with 64 Taps and 2-wire Interface

CAT5419
Dual Digitally Programmable Potentiometers (DPP™)
with 64 Taps and 2-wire Interface
FEATURES
„ Two linear-taper digital potentiometers
„ 64 resistor taps per potentiometer
„ End to end resistance 2.5kΩ, 10kΩ, 50kΩ or
100kΩ
„ Potentiometer control and memory access via
2-wire Interface (I²C like)
„ Low wiper resistance, typically 80
„ Four non-volatile wiper settings for each
potentiometer
„ Recall of wiper settings at power up
„ 2.5 to 6.0 volt operation
„ Standby current less than 1µA
„ 1,000,000 nonvolatile WRITE cycles
„ 100 year nonvolatile memory data retention
„ 24-lead SOIC and 24-lead TSSOP
„ Write protection for data register
DESCRIPTION
The CAT5419 is two Digitally Programmable
Potentiometers (DPP™) integrated with control logic
and 16 bytes of NVRAM memory.
A separate 6-bit control register (WCR) independently
controls the wiper tap position for each DPP.
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 regis-
ters is via a 2-wire serial bus (I²C-like). On power-up,
the contents of the first data register (DR0) for each of
the two potentiometers is automatically loaded into its
respective wiper control registers (WCR).
The Write Protection (¯W¯P¯) pin protects against
inadvertent programming of the data register.
The CAT5419 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.
PIN CONFIGURATION
SOIC (W)
(top view)
V_CC 1
24 NC
R_L0 2
23 NC
R_H0 3
22 NC
R_W0 4
21 NC
A2 5
20 A₀
¯W¯P¯ 6 _CAT 19 NC
SDA 7 ⁵⁴¹⁹ 18 A₃
A₁ 8
17 SCL
R_L1 9
16 NC
R_H1 10
15 NC
R_W1 11
14 NC
GND 12
13 NC
TSSOP (Y)
(top view)
SDA 1
24 ¯W¯P¯
A₁ 2
23 A₂
R_L1 3
22 R_W0
R_H1 4
21 R_H0
R_W1 5
20 R_L0
GND 6 _CAT 19 V_CC
NC 7 ⁵⁴¹⁹ 18 NC
NC 8
17 NC
NC 9
16 NC
NC 10
15 NC
SCL 11
14 A₀
A₃ 12
13 NC
For Ordering Information details, see page 15.
FUNCTIONAL DIAGRAM
R_H0 R_H1
SCL
SDA
WP
A0
A1
A2
A3
2-WIRE BUS
INTERFACE
WIPER
CONTROL
REGISTERS
R_W0
CONTROL
LOGIC
NONVOLATILE
DATA
REGISTERS
R_W1
R_L0 R_L1
2008 SCILLC. All rights reserved.
1
Characteristics subject to change without notice
Doc. No. MD-2115 Rev. I