PT6553-LQ Princeton Technology Corp, PT6553-LQ Datasheet - Page 5

• Manufacturer Part Number: PT6553-LQ
• Description: LCD Driver IC with Key Input Function
• Manufacturer: Princeton Technology Corp

TO CONTROLLER
TO CONTROLLER
POWER SUPPLY
CONTROLLER
APPLICATION CIRCUIT 3
1/3 Bias (For Normal Panel Use)
Notes :1. Connect a capacitor to the power supply line so that the when the PT6553 is reset by the
PT6553 v 1.0
LCD Driver IC with Key Input Function
FROM
VDET, the power supply VDD rise time when power is applied and the power supply voltage
VDD fall time when power drops are both at least 1 ms.
2. Since the DO Pin is an open drain output, it needs a pull-up resistor (1 to 10 k Ohms) which is
appropriate for the capacitance of the external wiring so that the waveforms are not degraded.
+5V
C > 0.047uF
(See Note 2)
Princeton Technology Corp.
(See Note 1)
VDD
TEST
VSS
CE
CLK
DI
DO
VDD1
VDD2
5
OSC
P1/SG1
P1/SG2
P3/SG3
P4/SG4
COM1
COM2
COM3
SG40
SG5
URL: http://www.princeton.com.tw
(UP TO 30 KEYS)
KEY MATRIX
Tel : [phone]
P1
Fax: [phone]
SG42
SG41
P2
P3
P4
Updated November 2000
GENERAL PURPOSE
OUTPUT PORTS USED
WITH THE BACK-
LIGHT CONTROLLER
OR OTHER CIRCUITS
SEGMENTS)
(UP TO 126
PANEL
LCD
PT6553