MCP4021T-502E/SN Microchip Technology, MCP4021T-502E/SN Datasheet - Page 26

• Manufacturer Part Number: MCP4021T-502E/SN
• Description: IC DGTL POT 5K 1CH 8SOIC
• Manufacturer: Microchip Technology

Specifications of MCP4021T-502E/SN

• Memory Type: Non-Volatile
• Taps: 64
• Resistance (ohms): 5K
• Number Of Circuits: 1
• Temperature Coefficient: 150 ppm/°C Typical
• Interface: Up/Down
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Resistance In Ohms: 5K
• End To End Resistance: 5kohm
• Resistance Tolerance: ± 20%
• No. Of Steps: 64
• Supply Voltage Range: 2.7V To 5.5V
• Control Interface: 2 Wire, Serial
• No. Of Pots: Single
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MCP4XXXDM-DB - BOARD DAUGHTER DIGIPOT MCP4XXXMCP402XEV - BOARD EVAL FOR MCP402X
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

MCP4021/2/3/4
4.2
The MCP4021/2/3/4 device’s WiperLock technology
allows application-specific calibration settings to be
secured in the EEPROM without requiring the use of an
additional write-protect pin.
The WiperLock technology prevents the serial
commands from doing the following:
• Incrementing or decrementing the wiper setting
• Writing the wiper setting to the non-volatile
Enabling and disabling the WiperLock technology
feature
(CS = V
requires high-voltage commands when the feature is
enabled. The high-voltage threshold (V
to prevent the wiper setting from being altered by noise
or intentional transitions on the U/D and CS pins, while
still providing flexibility for production or calibration
environments.
Both the CS and U/D input pins are tolerant of signals
up to 12V. This allows the flexibility to multiplex the
digital pot’s control signals onto application signals for
manufacturing/calibration.
4.3
When the device powers up, the last saved wiper
setting is restored.
While V
may not meet the data sheet specifications (see
Figure 4-2). The wiper may be unknown or initialized to
the value stored in the EEPROM. Also the device may
be capable of incrementing, decrementing and writing
to its EEPROM, if a valid command is detected on the
CS and U/D pins.
FIGURE 4-2:
DS21945C-page 26
memory
IHH
DD
The WiperLock™ Technology
Power-up
requires
). Incrementing and decrementing the wiper
< V
V
min
V
2.7V
V
WP
DD
SS
(2.7V), the electrical performance
high-voltage
Power-up and Brown-out.
serial
IHH
) is intended
commands
Specified AC/DC
Outside
Range
The default settings of the MCP4021/2/3/4 device’s
from the factory are shown in Table 4-1.
TABLE 4-1:
It is good practice in your manufacturing flow to
configure the device to your desired settings.
4.4
If the device V
age, care must be taken to ensure that the CS and U/D
pins do not “create” any of the serial commands.
When the device V
electrical performance may not meet the data sheet
specifications (see Figure 4-2). The wiper may be
unknown or initialized to the value stored in the
EEPROM. Also the device may be capable of incre-
menting, decrementing and writing to its EEPROM if a
valid command is detected on the CS and U/D pins.
4.5
The serial interface is inactive any time the CS pin is at
V
-202
-502
-103
-503
EEPROM
IH
Protect
Write
and all write cycles are completed.
Mid-scale
Mid-scale
Mid-scale
Mid-scale
Brown Out
Serial Interface Inactive
DD
is below the specified minimum volt-
DEFAULT FACTORY
SETTINGS SELECTION
DD
1Fh
1Fh
1Fh
1Fh
© 2005 Microchip Technology Inc.
drops below V
Disabled
Disabled
Disabled
Disabled
min
(2.7V), the
10.0 k
50.0 k
2.1 k
5.0 k