MCP4332-503E/ST

Manufacturer Part NumberMCP4332-503E/ST
DescriptionIC DGTL POT QUAD 50K 14TSSOP
ManufacturerMicrochip Technology
MCP4332-503E/ST datasheet
 


Specifications of MCP4332-503E/ST

Taps129Resistance (ohms)50K
Number Of Circuits4Temperature Coefficient150 ppm/°C Typical
Memory TypeVolatileInterfaceSPI Serial
Voltage - Supply1.8 V ~ 5.5 VOperating Temperature-40°C ~ 125°C
Mounting TypeSurface MountPackage / Case14-TSSOP
Resistance In Ohms50KLead Free Status / RoHS StatusLead free / RoHS Compliant
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4.0
FUNCTIONAL OVERVIEW
This data sheet covers a family of four volatile Digital
Potentiometer and Rheostat devices that will be
referred to as MCP43XX. The MCP43X1 devices are
the Potentiometer configuration, while the MCP43X2
devices are the Rheostat configuration.
As the
Device Block Diagram
shows, there are four
main functional blocks. These are:
POR/BOR and Reset Operation
Memory Map
Resistor Network
Serial Interface (SPI)
The POR/BOR operation and the Memory Map are
discussed in this section and the Resistor Network and
SPI operation are described in their own sections. The
Device Commands
are discussed in Section 7.0.
4.1
POR/BOR and Reset Operation
The Power-on Reset is the case where the device is
having power applied to it from V
. The Brown-out
SS
Reset occurs when a device had power applied to it,
and that power (voltage) drops below the specified
range.
The devices RAM retention voltage (V
than the POR/BOR voltage trip point (V
maximum V
/V
voltage is less than 1.8V.
POR
BOR
When V
/V
< V
< 2.7V, the analog electrical
POR
BOR
DD
performance
may
not
meet
the
specifications. In this region, the device is capable of
incrementing, decrementing, reading and writing to its
volatile memory, if the proper serial command is
executed.
When V
< V
/V
or the RESET pin is Low, the
DD
POR
BOR
pin weak pull-ups are enabled.
4.1.1
POWER-ON RESET
When the device powers up, the device V
the V
/V
voltage. Once the V
POR
BOR
DD
the V
/V
voltage, the following happens:
POR
BOR
• Volatile wiper register is loaded with the default
value
• The TCON registers are loaded with their default
value
• The device is capable of digital operation
 2010 Microchip Technology Inc.
4.1.2
BROWN-OUT RESET
When the device powers down, the device V
cross the V
POR
Once the V
DD
voltage the following happens:
• Serial Interface is disabled
If the V
voltage decreases below the V
DD
the following happens:
• Volatile wiper registers may become corrupted
• TCON registers may become corrupted
As the voltage recovers above the V
the operation is the same as Power-on Reset (see
Section 4.1.1 “Power-on Reset”).
Serial commands not completed due to a brown-out
condition may cause the memory location to become
corrupted.
4.1.3
RESET PIN
The RESET pin can be used to force the device into
the POR/BOR state of the device. When the RESET
pin is forced Low, the device is forced into the Reset
state. This means that the TCON registers are forced
to their default values and the volatile wiper registers
are loaded with the default value. Also the SPI
) is lower
RAM
interface is disabled.
/V
). The
POR
BOR
This feature allows a hardware method for all registers
to be updated to the default value at the same time.
data
sheet
4.1.4
INTERACTION OF RESET PIN AND BOR/
POR CIRCUITRY
Figure 4-1
shows how the RESET pin signal and the
POR/BOR signal interact to control the hardware Reset
state of the device.
RESET (from pin)
POR/BOR signal
will cross
DD
voltage crosses
FIGURE 4-1:
RESET Pin Interaction.
MCP433X/435X
will
DD
/V
voltage.
BOR
voltage decreases below the V
/V
POR
BOR
voltage,
RAM
/V
voltage,
POR
BOR
Device Reset
POR/BOR Signal and
DS22242A-page 39