PCF8813 View Datasheet(PDF) - Philips Electronics
Part Name
Description
MFG CO.
'PCF8813' PDF : 72 Pages View PDF
Philips Semiconductors
(67 + 1) × 102 pixels matrix LCD driver
Product speciï¬cation
PCF8813
12 TEMPERATURE COMPENSATION
Due to the temperature dependency of the liquid crystal viscosity, the LCD controlling voltage VLCD must be increased
at lower temperatures to maintain optimum contrast. Figure 36 shows VLCD for high multiplex rates. In the PCF8813 the
temperature coefficient to be applied to VLCD can be selected from four values by setting bits TC[1:0].
handbook, full pagewidth
VLCD
MGT848
T
Fig.36 VLCD as a function of liquid crystal temperature.
13 LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 60134); see notes 1 and 2
SYMBOL
VDD1
VDD2, VDD3
VLCD
VI
ISS
II, IO
Ptot
PO
Tstg
Tj
PARAMETER
supply voltage
supply voltage (voltage multiplier); see note 3
LCD supply voltage
input voltage (any pad)
ground supply current
DC input or output current
total power dissipation
power dissipation per output
storage temperature
junction temperature
MIN.
−0.5
−0.5
−0.5
−0.5
−50
−10
−
−
−65
−
MAX.
+6.5
+4.5
+9.0
VDD + 0.5
+50
+10
300
30
+150
150
UNIT
V
V
V
V
mA
mA
mW
mW
°C
°C
Notes
1. Stresses above those listed under limiting values may cause permanent damage to the device.
2. Parameters are valid over operating temperature range unless otherwise specified; all voltages are with respect to
VSS unless otherwise specified.
3. VDD2 and VDD3 are always equal.
14 HANDLING
Inputs and outputs are protected against electrostatic discharge in normal handling. However, to be totally safe, it is
desirable to take normal precautions appropriate to handling MOS devices (see “Handling MOS devicesâ€).
2004 Mar 05
38
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