PCF2119AU NXP [NXP Semiconductors], PCF2119AU Datasheet - Page 55

• Manufacturer Part Number: PCF2119AU
• Description: LCD controllers/drivers Single-chip LCD controller and driver
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
16. Application information
PCF2119X
Product data sheet
16.1 General application information
16.2 Power supply connections for internal V
The required minimum value for the external capacitors in an application with the
PCF2119x are: C
Higher capacitor values are recommended for ripple reduction.
For COG applications the recommended ITO track resistance is to be minimized for the
I/O and supply connections. Optimized values for these tracks are below 50 Ω for the
supply and below 100 Ω for the I/O connections. Higher track resistance reduce
performance and increase current consumption. To avoid accidental triggering of
Power-On Reset (POR) (especially in COG applications), the supplies must be
adequately decoupled. Depending on power supply quality, V
above the specified minimum.
When external LCD supply voltage is supplied, V
avoid any stray current, and V
The PCF2119x I
resistors are connected to a 5 V ±10 % supply.
Fig 38. Recommended V
Fig 39. Recommended V
Drawings are showing alternative circuits.
Decoupling capacitors are not shown in the drawings.
The value of the capacitor should be at least 100 nF.
1.5 V to 5.5 V
2.2 V to 4.0 V
All information provided in this document is subject to legal disclaimers.
2
GND
ext
C-bus interface is compatible with systems, where the I
from pins V
Rev. 7 — 15 November 2010
V
V
V
V
V
DD1
DD2
DD3
SS1
SS2
DD
LCD
013aaa114
connections for internal V
connections for internal V
LCDIN
LCD
to V
must be connected to V
V
SS2
SS
= 100 nF and for pins V
V
V
V
LCDIN
LCDOUT
LCDSENSE
013aaa116
LCDOUT
LCD
LCD
LCD
2.2 V to 4.0 V
should be left open-circuit to
generation
generation
generation
LCDSENSE
DD1
GND
LCD controllers/drivers
may have to be risen
DD
PCF2119x
.
to V
V
V
V
V
V
DD1
DD2
DD3
SS1
SS2
© NXP B.V. 2010. All rights reserved.
013aaa115
2
SS
C pull-up
= 470 nF.
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