MCP4342-103E/ST Microchip Technology, MCP4342-103E/ST Datasheet - Page 31

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MCP4342-103E/ST

Manufacturer Part Number
MCP4342-103E/ST
Description
IC DGTL POT QUAD 10K 14TSSOP
Manufacturer
Microchip Technology
Series
WiperLock™r
Datasheet

Specifications of MCP4342-103E/ST

Memory Type
Non-Volatile
Taps
129
Resistance (ohms)
10K
Number Of Circuits
4
Temperature Coefficient
150 ppm/°C Typical
Interface
SPI Serial
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
14-TSSOP
Resistance In Ohms
10K
End To End Resistance
10kohm
Track Taper
Linear
No. Of Steps
129
Supply Voltage Range
2.7V To 5.5V
Control Interface
Serial, SPI
No. Of Pots
Quad
Rohs Compliant
No
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MCP4342-103E/ST
Manufacturer:
Microchip
Quantity:
528
4.0
This Data Sheet covers a family of four non-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
Section 7.0.
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
reading and writing to its EEPROM and 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 value in the
• The TCON registers are loaded their default value
• The device is capable of digital operation
© 2009 Microchip Technology Inc.
POR/BOR and RESET Operation
Memory Map
Resistor Network
Serial Interface (SPI)
corresponding non-volatile wiper register
POR
POR
Device Block Diagram
DD
FUNCTIONAL OVERVIEW
POR/BOR and RESET Operation
/V
POR
/V
< V
BOR
BOR
POWER-ON RESET
POR
/V
POR
BOR
may
/V
voltage. Once the V
voltage, the following happens:
BOR
/V
BOR
< V
not
voltage is less then 1.8V.
commands are discussed in
or the RESET pin is Low, the
DD
meet
< 2.7V, the electrical
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
• EEPROM Writes are 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
see Section 4.1.1 “Power-on Reset”.
Serial commands not completed due to a brown-out
condition may cause the memory location (volatile and
non-volatile) 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 and STATUS
registers are forced to their default values and the
volatile wiper registers are loaded with the value in the
corresponding Non-Volatile wiper register. Also the
SPI interface is disabled. Any non-volatile write cycle
is not interrupted, and allowed to complete.
This feature allows a hardware method for all registers
to be updated 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
MCP434X/436X
/V
BOR
voltage.
POR/BOR Signal and
POR
DS22233A-page 31
Device reset
/V
RAM
BOR
POR
voltage,
voltage
DD
/V
BOR
will

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