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PCF8883 bảng dữ liệu(PDF) 8 Page - NXP Semiconductors

tên linh kiện PCF8883
Giải thích chi tiết về linh kiện  Capacitive proximity switch with auto-calibration, large voltage operating range and very low power consumption
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PCF8883 bảng dữ liệu(HTML) 8 Page - NXP Semiconductors

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PCF8883_1
© NXP B.V. 2009. All rights reserved.
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
013aaa077
Capacitance
on input
OUT
(push-button)
OUT
(toggle)
OUT
(pulse)
t
t
t
t
tclk(H) = CTYPE · 2 ms/nF
tclk(H) = CTYPE · 2 ms/nF
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(INTREGD)
VDD
D
VDD
VDD(min)
VDD(max)
Vlockin(max)
Vlockin(min)
VDD(min)



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