DS1846E-010+ Maxim Integrated Products, DS1846E-010+ Datasheet - Page 2

• Manufacturer Part Number: DS1846E-010+
• Description: IC NV TRI-POT MEM MON 20TSSOP
• Manufacturer: Maxim Integrated Products

Specifications of DS1846E-010+

• Taps: 100, 256
• Resistance (ohms): 10K, 100K
• Number Of Circuits: 3
• Temperature Coefficient: 750 ppm/°C Typical
• Memory Type: Non-Volatile
• Interface: 2-Wire Serial
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP
• Resistance In Ohms: 10K, 100K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The EEPROM memory allows a user to store configuration or calibration data for a specific system or
device and provides control of the potentiometer wiper settings. Any type of user information can reside
in the first 248 bytes (00h to F7h) of this memory. The next three bytes of memory (F8h to FAh) are for
potentiometer settings and the last five addresses of EEPROM memory (FBh to FFh) are reserved. These
reserved and potentiometer registers should not be used for data storage. Access to this EEPROM is
through an industry-standard 2-wire bus. The interface I/O pins consist of SDA and SCL. The wiper
positions of the DS1846, as well as EEPROM data, can be hardware write-protected using the WP input
pin.
The MicroMonitor is a precision temperature-compensated reference and comparator that monitors
certain vital status conditions for a microprocessor. When a sense input detects an out-of-tolerance (V
condition, a nonmaskable interrupt is generated. As the voltage at the device degrades, an internal power-
fail signal is generated that can be used to reset the processor. When V
the reset signal is kept in the active state for a minimum time of t
power supply and the microprocessor. The MicroMonitor also functions as a pushbutton reset control.
The pushbutton input is debounced internally and generates an active pulse width of t
DS1846 BLOCK DIAGRAM Figure 1
PBRST
SDA
SCL
V
WP
A0
CC
IN
V
CCTP
Digital Potentiometer
R
Interface
2-Wire
PBR
V
Nonvolatile
TP
V
CC
Data
Potentiometer 2
Potentiometer 0
Potentiometer 1
User EPROM
MicroMonitor
5 Reserved
EEPROM
248 Bytes
FBh-FFh
00h-F7h
Bytes
Timer
Delay
Timer
Delay
FAh
F9h
F8h
DS1846
2 of 18
100-Positions
100-Positions
256-Positions
Potentiometer 2
Potentiometer 0
Potentiometer 1
100kW
Addr FAh
10kW
Addr F9h
10kW
Addr F8h
V
CC
2.4kW
typical
RST
to allow for the stabilization of the
CC
returns to an in-tolerance level,
H2
W2
L2
H0
W0
L0
H1
W1
L1
RST
RST
NMI
RST
minimum.
CC
)