MCP4014-502E/CH View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

MCP4014-502E/CH

Low-Cost 64-Step Volatile Digital POT

Microchip Technology 

MCP4011/2/3/4

4.2 Power-up

When the device powers up (rising VDD crosses the

Trip Point Voltage (VTP)), the “default” wiper setting is

restored. Table 4-1 shows the default value loaded into

the wiper on POR/BOR.

TABLE 4-1: DEFAULT POR WIPER

SETTING SELECTION

Package

Code

Default

POR

Wiper

Setting

Wiper

Code

Typical

RAB Value

-202

-502

-103

-503

Mid-scale

1Fh

Mid-scale

1Fh

Mid-scale

1Fh

Mid-scale

1Fh

2.1 kΩ

5.0 kΩ

10.0 kΩ

50.0 kΩ

While VDD < Vmin (1.8V), the electrical performance

may not meet the data sheet specifications (see

Figure 4-2). The wiper state may be unknown. Also, the

device may be capable of incrementing or decrement-

ing, if a valid command is detected on the CS and U/D

pins.

4.3 Brown Out

If the device VDD is below the specified minimum

voltage, care must be taken to ensure that the CS and

U/D pins do not “create” any of the serial commands.

When the device VDD drops below VMIN (1.8V), the

electrical performance may not meet the data sheet

specifications (see Figure 4-2). The wiper state may be

unknown. Also, the device may be capable of

incrementing or decrementing, if a valid command is

detected on the CS and U/D pins.

When the device voltage rises from below the power-

up trip point (VTP) into the valid operation voltage

range, the wiper state will be forced to the default POR

wiper setting (see Table 4-1).

4.4 Serial Interface Inactive

The serial interface is inactive any time the CS pin is at

VIH and all write cycles are completed.

VDD

1.8V

VTP

VSS

FIGURE 4-2:

POR Trip Point (on Rising VDD)

Outside Device Operation

Wiper Forced to Default POR Setting

Power-up and Brown-out.

DS21978C-page 28

© 2006 Microchip Technology Inc.

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