PT6553-LQ Princeton Technology Corp, PT6553-LQ Datasheet - Page 4

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

APPLICATION CIRCUIT 2
1/2 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
TO CONTROLLER
POWER SUPPLY
TO CONTROLLER
CONTROLLER
FROM
10 kOhms > R > 1kOhms
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.
C > 0.047uF
+5V
Princeton Technology Corp.
(See Note 2)
C
(See Note 1)
R
R
VDD
TEST
VSS
VDD1
VDD2
CE
CLK
DI
DO
4
OSC
P1/SG1
P1/SG2
P3/SG3
P4/SG4
COM1
COM2
COM3
(UP TO 30 KEYS)
SG5
URL: http://www.princeton.com.tw
KEY MATRIX
SG41
SG42
P1
P2
Tel : [phone]
P3
Fax: [phone]
P4
SEGMENTS)
(UP TO 126
Updated November 2000
GENERAL PURPOSE
OUTPUT PORTS USED
WITH THE BACK-
LIGHT CONTROLLER
OR OTHER CIRCUITS
PANEL
LCD
PT6553