PC8534A-1 View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
Manufacturer
PC8534A-1 Datasheet PDF : 47 Pages
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NXP Semiconductors
PCF8534A
Universal LCD driver for low multiplex rates
6.2 Pin description
Table 3. Pin description
Symbol
Pin
SOT315-1 Bare die
S31 to S59 1 to 29 44 to 72
BP0 to BP3 30 to 33 73 to 76
n.c.
34 to 37 -
SDA
38
1
SCL
39
2
CLK
40
3
VDD
41
4
SYNC
42
5
OSC
43
6
A0 to A2
44 to 46 7 to 9
SA0
47
10
VSS
VLCD
S0 to S30
48
49
50 to 80
11[1]
12
13 to 43
Description
LCD segment output 31 to 59
LCD backplane output 0 to 3
not connected
I2C-bus serial data input and output
I2C-bus serial clock input
external clock input and internal clock output
supply voltage
cascade synchronization input and output (active LOW)
enable input for internal oscillator
subaddress counter input 0 to 2
I2C-bus slave address input 0
ground
input of LCD supply voltage
LCD segment output 0 to 30
[1] The substrate (rear side of the die) is wired to VSS but should not be electrically connected.
7. Functional description
The PCF8534A is a versatile peripheral device designed to interface any microprocessor
or microcontroller to a wide variety of LCDs. It can directly drive any static or multiplexed
LCD containing up to four backplanes and up to 60 segments.
The display configurations possible with the PCF8534A depend on the number of active
backplane outputs required. Display configuration selection is shown in Table 4. All of the
display configurations can be implemented in the typical system shown in Figure 5.
Table 4. Selection of display configurations
Number of
7-segment numeric
Backplanes Elements Digits
Indicator symbols
4
240
30
30
3
180
22
26
2
120
15
15
1
60
7
11
14-segment numeric
Characters Indicator symbols
16
16
12
12
8
8
4
4
Dot matrix
240 (4 × 60)
180 (3 × 60)
120 (2 × 60)
60 (1 × 60)
PCF8534A_5
Product data sheet
Rev. 05 — 6 August 2009
© NXP B.V. 2009. All rights reserved.
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