Rainbow Electronics DS1846 - Manual

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FEATURES
Three linear taper potentiometers
−
Two 10 k
Ω
, 100 position
−
One 100 k
Ω
, 256 position
256 bytes of EEPROM memory
Monitors microprocessor power supply,
voltage sense, and external override
Access to data and potentiometer control via
a 2-wire interface
External Write Protect pin to protect data and
potentiometer settings
Nonvolatile wiper storage
Operates from 3V or 5V supplies
Packaging: 20-pin TSSOP
Industrial operating temperature:
-40ºC to +85ºC
Programming temperature: 0ºC to +70ºC
PIN ASSIGNMENT
PIN DESCRIPTION
V
CC
- 3V or 5V Power Supply Input
GND - Ground
SDA - 2-wire Serial Data
Input/Output
SCL - 2-wire Serial Clock Input
WP - Write Protect Input
A0 - Address Input
H0, H1, H2 - High-End of Potentiometer
L 0, L1, L2 - Low-End of Potentiometer
W0, W1, W2 - Wiper Terminal of
Potentiometer
PBRST - Push Button Reset Button
NMI - Non-maskable Interrupt
IN - Voltage Input
RST - Active Low Reset Output
RST - Active High Reset Output
OVERVIEW
The DS1846 NV Tri-Potentiometer, Memory and MicroMonitor consists of two 10 k
Ω, =100-position
linear taper potentiometer, one 100 k
Ω, =256-position linear taper potentiometer, 256 bytes of EEPROM
memory, and a MicroMonitor. The device provides an ideal method for setting bias voltages and currents
in control applications using a minimum of circuitry.
DS1846
NV Tri-Potentiometer,
Memory and MicroMonitor
www.dalsemi.com
SDA
SCL
A0
WP
NMI
L0
W1
L1
L2
GND
V
CC
IN
PBRST
RST
RST
H0
W0
H1
W2
H2
20-pin TSSOP