PCF8883 datasheet(8/24 Pages) NXP

Part #	PCF8883

Description	Capacitive proximity switch with auto-calibration, large voltage operating range and very low power consumption

PDF	24 Pages

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Manufacturer	NXP [NXP Semiconductors]

Direct Link	http://www.nxp.com

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8 / 24 page

PCF8883_1

Product data sheet

Rev. 01 — 16 October 2009

8 of 24

NXP Semiconductors

PCF8883

Capacitive proximity switch with auto-calibration

8.2 Voltage regulator

The PCF8883 implements a chip-internal voltage regulator supplied by pin VDD that

provides an internal supply (VDD(INTREGD)), limited to a maximum of 4.6 V. The lock-in

voltage Vlockin on VDD is typically 4.0 V. The regulated supply is available at pin

VDD(INTREGD) and can be used to supply power to external electronic components (at a

maximum current of 0.5 mA). Figure 4 shows the relationship between VDD and

VDD(INTREGD).

Fig 5.

Switching modes timing diagram of PCF8883

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Capacitance

on input

OUT

(push-button)

OUT

(toggle)

OUT

(pulse)

tclk(H) = CTYPE · 2 ms/nF

Fig 6.

Integrated voltage regulator

013aaa078

operational range of PCF8883

VDD(max)

Vlockin(max)

Vlockin(min)

VDD(INTREGD)

VDD

VDD(min)

VDD(max)

Vlockin(max)

Vlockin(min)

VDD(min)

PCF8883 Datasheet(PDF) 8 Page - NXP Semiconductors