PCF8576DT NXP Semiconductors, PCF8576DT Datasheet - Page 33

• Manufacturer Part Number: PCF8576DT
• Manufacturer: NXP Semiconductors

Specifications of PCF8576DT

• Operating Supply Voltage (typ): 2.5/3.3/5V
• Number Of Digits: 20
• Number Of Segments: 160
• Package Type: TSSOP
• Pin Count: 56
• Mounting: Surface Mount
• Power Dissipation: 400mW
• Frequency (max): 400KHz
• Operating Supply Voltage (min): 1.8V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / Rohs Status: Supplier Unconfirmed

NXP Semiconductors
PCF8576D_9
Product data sheet
The contact resistance between the SYNC on each cascaded device must be controlled.
If the resistance is too high, the device is not able to synchronize properly; this is
particularly applicable to chip-on-glass applications. The maximum SYNC contact
resistance allowed for the number of devices in cascade is given in
Table 18.
The PCF8576D can be cascaded with the PCF8562, the PCF8533 or the PCF8534A.
This allows optimal drive selection for a given number of pixels to display.
Figure 21
Number of devices
2
3 to 5
6 to 10
10 to 16
Fig 22. Cascaded PCF8576D configuration
V
V
V
CONTROLLER
PROCESSOR/
SS
LCD
DD
MICRO-
MICRO-
HOST
show the timing of the synchronization signals.
SYNC contact resistance
R
2C
t r
B
Rev. 09 — 25 August 2009
SYNC
OSC
SDA
SCL
CLK
SYNC
SDA
SCL
CLK
OSC
4
5
7
1, 58, 59
2, 3
8
A0
1, 58, 59
2, 3
4
5
7
Universal LCD driver for low multiplex rates
8
6
PCF8576DU
A0
V
9
DD
A1
Maximum contact resistance
6 k
2.2 k
1.2 k
700
PCF8576DU
6
9
V
A1
10
DD
A2
13
10
V
A2 SA0 V
13
11
LCD
SA0
V
11
LCD
12
V
12
SS
40 segment drives
SS
4 backplanes
40 segment drives
BP0 to BP3
BP0 to BP3
(open-circuit)
PCF8576D
Table
© NXP B.V. 2009. All rights reserved.
18.
Figure 20
LCD PANEL
(up to 2560
elements)
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and