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PDF PCF8576D Data sheet ( Hoja de datos )
| Número de pieza | PCF8576D | |
| Descripción | Universal LCD driver | |
| Fabricantes | NXP Semiconductors | |
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PCF8576D
Universal LCD driver for low multiplex rates
Rev. 10 — 14 February 2011
Product data sheet
1. General description
The PCF8576D is a peripheral device which interfaces to almost any Liquid Crystal
Display (LCD) 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 PCF8576D is compatible with most
microcontrollers and communicates via the two-line bidirectional I2C-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).
2. Features and benefits
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AEC-Q100 compliant (PCF8576DT/S400/2) for automotive applications
Single chip LCD controller and driver
Selectable backplane drive configuration: static or 2, 3, 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 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 6.5 V for high-threshold twisted nematic LCDs
Low power consumption
400 kHz I2C-bus interface
May be cascaded for large LCD applications (up to 2560 elements possible)
No external components required
Compatible with chip-on-glass and chip-on-board technology
Manufactured in silicon gate CMOS process
1 page  
NXP Semiconductors
PCF8576D
Universal LCD driver for low multiplex rates
S18 36
S19 37
S20 38
S21 39
S22 40
S23 41
S24 42
S25 43
S26 44
S27 45
S28 46
S29 47
S30 48
S31 49
S32 50
S33 51
PCF8576DU
21 S3
20 S2
19 S1
18 S0
17 BP3
16 BP1
15 BP2
14 BP0
13 VLCD
12 VSS
11 SA0
10 A2
9 A1
001aag424
Fig 3.
Viewed from active side. C1 and C2 are alignment marks. For mechanical details, see Figure 25
and Figure 26.
Pinning diagram for PCF8576DU/x (bare die)
www.DataSheet4U.com
PCF8576D
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 10 — 14 February 2011
© NXP B.V. 2011. All rights reserved.
5 of 50
5 Page 
NXP Semiconductors
PCF8576D
Universal LCD driver for low multiplex rates
7.4 LCD drive mode waveforms
7.4.1 Static drive mode
The static LCD drive mode is used when a single backplane is provided in the LCD. The
backplane (BPn) and segment drive (Sn) waveforms for this mode are shown in Figure 6.
BP0
VLCD
VSS
VLCD
Sn
Tfr
LCD segments
state 1
(on)
state 2
(off)
VSS
Sn+1
VLCD
VSS
(a) Waveforms at driver.
VLCD
state 1 0 V
−VLCD
VLCD
state 2
0V
−VLCD
(b) Resultant waveforms
at LCD segment.
(1) Vstate1(t) = VSn(t) − VBP0(t).
(2) Von(RMS) = VLCD.
(3) Vstate2(t) = VSn+1(t) − VBP0(t).
(4) Voff(RMS) = 0 V.
Fig 6. Static drive mode waveforms
mgl745
www.DataSheet4U.com
PCF8576D
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 10 — 14 February 2011
© NXP B.V. 2011. All rights reserved.
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