DS1846 Datasheet, PDF (1/18 Pages) Maxim Integrated Products – NV Tri-Potentiometer, Memory, and MicroMonitor

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DS1846
NV Tri-Potentiometer,
Memory, and MicroMonitor
FEATURES
§ Three linear taper potentiometers
- Two 10kW, 100-position
- One 100kW, 256-position
§ 248 bytes of user EEPROM memory
§ Monitors microprocessor power supply,
voltage sense, and external override
§ Access to data and potentiometer control
through a 2-wire interface
§ External write-protect (WP) pin to protect
data and potentiometer settings
§ Operates from a 5V supply
§ Nonvolatile (NV) wiper storage
§ Packaging: 20-pin TSSOP
§ Programming temperature: 0ºC to +70ºC
§ Industrial operating temperature:
-40ºC to +85ºC
ORDERING INFORMATION
DS1846E-010
DS1846E-010/T&R (Tape-and-Reel Version)
PIN CONFIGURATION
SDA ₁
SCL ₂
A0 3
WP 4
NMI 5
L0 6
W1 7
L1 8
L2 9
GND ¹⁰
20 VCC
19 IN
18 _PBRST
17 _RST
16 _RST
15 H0
14 W0
13 H1
12 W2
11 H2
20-Pin TSSOP
PIN DESCRIPTION
V_CC
– 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
L0, L1, L2 – Low End of Potentiometer
W0, W1, W2 – Wiper Terminal of
Potentiometer
PBRST
NMI
IN
– Pushbutton Reset Input
– Nonmaskable Interrupt
Output
– NMI Voltage Input
RST
– Active-Low Reset Output
RST
– Active-High Reset Output
OVERVIEW
The DS1846 NV tri-potentiometer, memory, and MicroMonitor™ consists of two 10kW, 100-position
linear taper potentiometers, one 100kW, 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.
MicroMonitor is a trademark of Dallas Semiconductor.
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