1. General description
The PCA85176 is a peripheral device which interfaces to almost any Liquid Crystal
Display (LCD)
1
with low multiplex rates. It generates the drive signals for any static or
multiplexed LCD containing up to four backplanes and up to 40 segments. It can be easily
cascaded for larger LCD applications. The PCA85176 is compatible with most
microcontrollers and communicates via the two-line bidirectional I
2
C-bus. Communication
overheads are minimized by a display RAM with auto-incremented addressing, by
hardware subaddressing, and by display memory switching (static and duplex drive
modes).
For a selection of NXP LCD segment drivers, see Table 24 on page 51
.
2. Features and benefits
AEC-Q100 compliant for automotive applications
Single chip LCD controller and driver
Selectable backplane drive configuration: static, 2, 3, or 4 backplane multiplexing
Selectable display bias configuration: static,
1
⁄
2
, or
1
⁄
3
Internal LCD bias generation with voltage-follower buffers
40 segment drives:
Up to 20 7-segment numeric characters
Up to 10 14-segment alphanumeric characters
Any graphics of up to 160 segments/elements
40 4-bit RAM for display data storage
Auto-incremented display data loading across device subaddress boundaries
Display memory bank switching in static and duplex drive modes
Versatile blinking modes
Independent supplies possible for LCD and logic voltages
Wide power supply range: from 1.8 V to 5.5 V
Wide logic LCD supply range:
From 2.5 V for low-threshold LCDs
Up to 8.0 V for guest-host LCDs and high-threshold twisted nematic LCDs
Low power consumption
Extended temperature range up to 95 C
400 kHz I
2
C-bus interface
May be cascaded for large LCD applications (up to 2560 segments/elements possible)
No external components required
PCA85176
40 x 4 automotive LCD driver for low multiplex rates
Rev. 6 — 7 April 2015 Product data sheet
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 22.
