PCF2119AU/2DA/2 NXP [NXP Semiconductors], PCF2119AU/2DA/2 Datasheet - Page 53

• Manufacturer Part Number: PCF2119AU/2DA/2
• Description: LCD controllers/drivers
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCF2119X_5
Product data sheet
16.3 Power supply connections for external V
16.4 Information about V
16.5 Reducing current consumption
V
the bias level buffers.
V
must be connected to V
V
the internal V
using an external V
Reducing current consumption can be achieved by one of the options given in
When V
to use the on-chip V
Table 37.
Original mode
character mode
display on
V
any mode
Fig 39. Recommended V
Fig 40. Recommended V
LCDIN
LCDOUT
LCDSENSE
LCD
generator operating
— This input is used for generating the 5 LCD bias levels. It is the power supply for
LCD
— This is the V
Decoupling capacitors are not shown in the drawings.
Remark: When using an external V
otherwise damages will occur.
Reducing current consumption
1.5 V to 5.5 V
2.2 V to 4.0 V
— This input is used for the voltage multiplier’s regulation circuitry. When using
lies outside the V
LCD
GND
generation, this pin must be connected to V
LCD
LCD
Rev. 05 — 13 August 2009
supply it must be connected to V
LCDIN
generator than an external regulator.
LCD
V
V
V
V
V
LCD
DD1
DD2
DD3
SS1
SS2
DD
LCD
013aaa114
output if V
connections for external V
DD
and to V
connections for external V
connections
range and must be generated, it is usually more efficient
V
SS2
LCDSENSE
LCD
LCD
, the internal V
n.c.
is generated internally. In this case pin V
Alternative mode
icon mode (control bit IM)
display off (control bit D)
direct mode
power-down mode (pin PD)
V
V
V
.
LCDIN
LCDOUT
LCDSENSE
013aaa118
LCD
LCD
LCD
LCD
2.2 V to 4.0 V
generator must never be switched on
LCDIN
generation
generation
generation
LCDOUT
GND
only.
LCD controllers/drivers
PCF2119x
and V
V
V
V
V
V
DD1
DD2
DD3
SS1
SS2
© NXP B.V. 2009. All rights reserved.
013aaa117
LCDIN
Table
. When
LCDOUT
53 of 79
37.