Datasheet

MCP40D17/18/19
DS22152B-page 32 © 2009 Microchip Technology Inc.
TABLE 4-1: DEVICE FUNCTIONALITY AT EACH V
DD
REGION (NOTE 1)
FIGURE 4-1: Power-up and Brown-out.
V
DD
Level
Serial
Interface
Potentiometer
Terminals
Wiper Setting Comment
V
DD
< V
BOR
< 1.8V Ignored “unknown” Unknown
V
BOR
≤ V
DD
< 1.8V “Unknown” Operational with
reduced electrical
specs
Wiper Register loaded
with POR/BOR value
1.8V ≤ V
DD
< 2.7V Accepted Operational with
reduced electrical
specs
Wiper Register
determines Wiper
Setting
Electrical performance may not
meet the data sheet specifications.
2.7V ≤ V
DD
≤ 5.5V Accepted Operational Wiper Register
determines Wiper
Setting
Meets the data sheet specifications
Note 1: For system voltages below the minimum operating voltage, the customer will be recommended to use a
voltage supervisor to hold the system in reset. This will ensure that MCP4017/18/19 commands are not
attempted out of the operating range of the device.
V
POR/BOR
V
SS
V
DD
2.7V
Outside Specified
Normal Operation Range
Device’s Serial
Wiper Forced to Default POR/BOR setting
V
BOR
Delay
Normal Operation Range
1.8V
Interface is
“Not Operational”
AC/DC Range
Analog
Characteristics
not specified
Analog
Characteristics not specified
V
RAM