pca8576d NXP Semiconductors, pca8576d Datasheet - Page 31

• Manufacturer Part Number: pca8576d
• Description: Automotive 40 X 4 Lcd Segment Driver For Low Multiplex Rates Up To 1 4
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA8576D
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 19.
The PCA8576D can be cascaded with the PCA8534A. This allows optimal drive selection
for a given number of pixels to display.
synchronization signals.
Number of devices
2
3 to 5
6 to 10
10 to 16
Fig 21. Cascaded PCA8576D configuration
V
V
V
CONTROLLER
PROCESSOR/
SS
LCD
DD
MICRO-
MICRO-
HOST
SYNC contact resistance
R ≤
2C
All information provided in this document is subject to legal disclaimers.
t
r
B
Automotive 40 x 4 LCD segment driver for low multiplex rates
Rev. 1 — 4 April 2011
SYNC
OSC
SDA
SCL
CLK
SYNC
OSC
SDA
SCL
CLK
Figure 19
A0
A0
V
PCA8576D
DD
Maximum contact resistance
6 k
2.2 k
1.2 k
700 
A1
PCA8576D
V
A1
DD
and
A2
A2 SA0 V
V
LCD
SA0
V
Figure 20
LCD
V
SS
40 segment drives
SS
4 backplanes
40 segment drives
BP0 to BP3
show the timing of the
BP0 to BP3
(open-circuit)
PCA8576D
Table
© NXP B.V. 2011. All rights reserved.
19.
LCD PANEL
(up to 2560
elements)
013aaa471
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