DS1846E-010+ Maxim Integrated Products, DS1846E-010+ Datasheet - Page 3

• 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

PIN DESCRIPTIONS
V
GND—Ground Terminal
SDA—2-Wire Serial Data Interface. The serial data pin is for serial data transfer to and from the
DS1846. The pin is open drain and can be wire-ORed with other open-drain or open-collector interfaces.
SCL—2-Wire Serial Clock Interface. The serial clock input is used to clock data into the DS1846 on
rising edges and clock data out on falling edges.
WP—Write Protect. WP must be connected to GND before either the data in memory or potentiometer
wiper settings may be changed. WP is pulled high internally and must be either left open or connected to
V
A0—Address Input. This input pin specifies the address of the device when used in a multidropped
configuration. As many as two DS1846s may be addressed on a single 2-wire bus.
H0, H1, H2—High-End Terminals of the Potentiometers. For the three potentiometers, it is not
required that these terminals be connected to a potential greater than the low-end terminal of the
potentiometer. Voltage applied to the high end of the potentiometers cannot exceed the power-supply
voltage, V
L0, L1, L2—Low-End Terminals of the Potentiometers. It is not required that these terminals be
connected to a potential less than the high-end terminals of the pot. Voltage applied to the low end of the
potentiometers cannot exceed the power-supply voltage, V
W0, W1, W2—Wipers of the Potentiometers. These pins are the wiper terminals of the potentiometers.
Three bytes in EEPROM memory locations F8h, F9h, and FAh determine each wiper’s setting. Voltage
applied to either wiper terminal cannot exceed the power-supply voltage, V
MicroMonitor. Pushbutton reset is pulled high internally.
warning.
IN—NMI Voltage Input. An input voltage below VTP on this input forces the NMI output low. This can
be used with a voltage-divider to set a secondary voltage monitoring level. (See Figure 4.)
microprocessor.
RST—Active-High Reset Output. This signal provides an output that can be used to reset a
microprocessor.
PBRST
NMI
RST
CC
CC
—Power-Supply Terminal. The DS1846 will support supply voltages ranging from +4.5V to +5.5V.
if write protection is desired.
—Active-Low Reset Output. This signal provides an output that can be used to reset a
—Nonmaskable Interrupt. Active-low signal that is generated to provide for an early power-fail
—Pushbutton Reset. This input pin is active low. It acts as the pushbutton reset pin for the
CC
, or go below ground.
3 of 18
CC
, or go below ground.
CC
, or go below ground.