MCP4332-503E/ST Microchip Technology, MCP4332-503E/ST Datasheet - Page 39

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MCP4332-503E/ST

Manufacturer Part Number
MCP4332-503E/ST
Description
IC DGTL POT QUAD 50K 14TSSOP
Manufacturer
Microchip Technology
Datasheet

Specifications of MCP4332-503E/ST

Taps
129
Resistance (ohms)
50K
Number Of Circuits
4
Temperature Coefficient
150 ppm/°C Typical
Memory Type
Volatile
Interface
SPI Serial
Voltage - Supply
1.8 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
14-TSSOP
Resistance In Ohms
50K
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Part Number:
MCP4332-503E/ST
Manufacturer:
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Quantity:
135
4.0
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
main functional blocks. These are:
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
4.1
The Power-on Reset is the case where the device is
having power applied to it from V
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
When V
performance
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
pin weak pull-ups are enabled.
4.1.1
When the device powers up, the device V
the V
the V
• Volatile wiper register is loaded with the default
• The TCON registers are loaded with their default
• The device is capable of digital operation
 2010 Microchip Technology Inc.
POR/BOR and Reset Operation
Memory Map
Resistor Network
Serial Interface (SPI)
value
value
POR
POR
Device Block Diagram
DD
POR
FUNCTIONAL OVERVIEW
POR/BOR and Reset Operation
/V
/V
< V
BOR
BOR
POWER-ON RESET
POR
/V
BOR
POR
may
/V
voltage. Once the V
voltage, the following happens:
BOR
/V
< V
are discussed in Section 7.0.
BOR
not
voltage is less than 1.8V.
DD
or the RESET pin is Low, the
< 2.7V, the analog electrical
meet
shows, there are four
SS
DD
the
. The Brown-out
POR
voltage crosses
RAM
data
DD
/V
) is lower
BOR
will cross
). The
sheet
4.1.2
When the device powers down, the device V
cross the V
Once the V
voltage the following happens:
• Serial Interface is disabled
If the V
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
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
interface is disabled.
This feature allows a hardware method for all registers
to be updated to the default value at the same time.
4.1.4
Figure 4-1
POR/BOR signal interact to control the hardware Reset
state of the device.
FIGURE 4-1:
RESET Pin Interaction.
RESET (from pin)
POR/BOR signal
DD
RESET PIN
INTERACTION OF RESET PIN AND BOR/
POR CIRCUITRY
voltage decreases below the V
DD
shows how the RESET pin signal and the
POR
BROWN-OUT RESET
voltage decreases below the V
MCP433X/435X
/V
BOR
voltage.
POR/BOR Signal and
POR
DS22242A-page 39
Device Reset
/V
RAM
BOR
POR
voltage,
voltage,
DD
/V
BOR
will

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