PCF8576DTSLASH2 datasheet(7/52 Pages) NXP

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PCF8576D_7

Product data sheet

Rev. 7 — 18 December 2008

7 of 52

NXP Semiconductors

PCF8576D

Universal LCD driver for low multiplex rates

6.2 Pin description

[1]

The substrate (rear side of the die) is wired to VSS but should not be electrically connected.

Functional description

The PCF8576D is a versatile peripheral device designed to interface any

microprocessor or microcontroller with a wide variety of LCDs. It can directly drive any

static or multiplexed LCD containing up to four backplanes and up to 40 segments.

The possible display conﬁgurations of the PCF8576D depend on the number of active

backplane outputs required. A selection of display conﬁgurations is shown in Table 4. All

of these conﬁgurations can be implemented in the typical system shown in Figure 5.

Table 3.

Pin description

Symbol

Description

PCF8576DH/2

PCF8576DT/2

PCF8576DUx

SDA

1, 58 and 59

I2C-bus serial data input and output

SCL

2 and 3

I2C-bus serial clock input

CLK

external clock input or output

VDD

supply voltage

SYNC

cascade synchronization input or

output

OSC

internal oscillator enable input

A0 to A2

16 to 18

50 to 52

8 to 10

subaddress inputs

SA0

I2C-bus address input; bit 0

VSS

12[1]

ground supply voltage

VLCD

LCD supply voltage

BP0, BP2,

BP1, BP3

25 to 28

56, 1, 2, 3

14 to 17

LCD backplane outputs

S0 to S39

29 to 32, 34 to 47,

49 to 64, 2 to 7

4 to 43

18 to 57

LCD segment outputs

n.c.

1, 8, 9, 22 to 24,

33, 48

not connected

Table 4.

Display conﬁgurations

Number of:

7-segment numeric

14-segment numeric

Dot matrix

Backplanes Segments Digits

Indicator

symbols

Characters Indicator

symbols

160

160 dots (4

× 40)

120

120 dots (3

× 40)

80 dots (2

× 40)

40 dots (1

× 40)

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