PCF8576 datasheet(10/40 Pages) PHILIPS

Part #	PCF8576

Description	Universal LCD driver for low multiplex rates

Download	40 Pages

Scroll/Zoom	100%

Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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10 / 40 page

1998 Feb 06

10

Philips Semiconductors

Product speciﬁcation

Universal LCD driver for low multiplex

rates

PCF8576

Fig.5 Waveforms for the 1 : 2 multiplex drive mode with 1

⁄2bias (Vop =VDD − VLCD).

V

state1 t

()

V

S

n

t

()

V

BP0 t

()

–

=

V

on(rms)

0.791V

op

=

V

state2 t

()

V

S

n

t

()

V

BP1 t

()

–

=

V

off(rms)

0.354V

op

=

MBE540

V

(V

)/2

V

DD

V

/2

op

Vop

state 1

0

BP0

S n 1

(a) waveforms at driver

(b) resultant waveforms

at LCD segment

LCD segments

state 2

Tframe

DD

LCD

VLCD

BP1

Sn

Vop

V

/2

op

V

/2

op

Vop

state 2

0

Vop

V

/2

op

state 1

V

(V

)/2

V

DD

LCD

VLCD

VDD

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