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PCA85132U
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PCA85132U Overview
The PCA85132 is a peripheral device which interfaces to almost any Liquid CrystalDisplay (LCD) with low multiplex rates. It generates the drive signals for any static ormultiplexed LCD containing up to four backplanes and up to 160 segments. It can easilybe cascaded for larger LCD applications. The PCA85132 is compatible with mostmicrocontrollers and communicates via the two-line bidirectional I2C-bus. Communicationoverheads are minimized by a display RAM with auto-incremental addressing, byhardware subaddressing, and by display memory switching (static and duplex drivemodes).Features
- AEC-Q100 compliant for automotive applications
- Single-chip LCD controller and driver for up to 640 elements
- Selectable backplane drive configuration: static, 2, 3, or 4 backplane multiplexing
- 160 segment drives:
- Up to 80 7-segment numeric characters
- Up to 40 14-segment alphanumeric characters
- Any graphics of up to 640 elements
- May be cascaded for large LCD applications (up to 5120 elements possible)
- 160 × 4-bit RAM for display data storage
- Software programmable frame frequency in steps of 5 Hz in the range of 60 Hz to 90 Hz; factory calibrated
- Wide LCD supply range: from 1.8 V for low threshold LCDs and up to 8.0 V for guest-host LCDs and high threshold (automobile) twisted nematic LCDs
- Internal LCD bias generation with voltage-follower buffers
- Selectable display bias configuration: static, 1/2, or 1/3
- Wide power supply range: from 1.8 V to 5.5 V
- LCD and logic supplies may be separated
- Low power consumption, typical: I
- DD
- DD(LCD)
- 400 kHz I2C-bus interface
- Auto-incremental display data loading across device subaddress boundaries
- Versatile blinking modes
- Compatible with Chip-On-Glass (COG) technology
- No external components
- Two sets of backplane outputs for optimal COG configurations of the application
Product Parameters
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Max number of elements
640
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Segments/elements of MUX 1:2
320
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Segments/elements of MUX 1:4
640
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VDD1 [min] (V)
1.8
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VLCD [min] (V)
1.8
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ffr
90.0
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Cascade for larger conf
Y
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Mean time between failures
200000000
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Segments/elements of MUX 1:1
160
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Segments/elements of MUX 1:3
480
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I2C-bus
Y
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VDD1 [max] (V)
5.5
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VLCD [max] (V)
8
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Selectable
SEL
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Failures in time
5
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