HD66523 Datasheet, PDF (18/19 Pages) Hitachi Semiconductor – (240-Channel Common Driver with Internal LCD Timing Circuit)

HD66523
Item
Symbol min. typ.
max.
Unit.
Measurement
Condition
Notes
Operating
f_opr1
frequency (1)
10
—
200
kHz
Master mode
1
(External clock
operation)
Operating
f_opr2
frequency (2)
5
—
100
kHz
Slave mode
2
frequency of CL1
Oscillation
frequency
f_OSC
30
36
42
kHz
C_f = 100pF
R_f = 180kΩ
External clock
Duty
45
50
55
%
Master mode
3
duty
External clock
t_r
rising time
—
—
100
ns
Master mode
3
External clock
t_f
falling time
—
—
100
ns
Master mode
3
Notes: 1. External clock is supplied to CR pin during master mode, and C and R pins must be left open.
2. Applies to the clock which is supplied to CL1 during slave mode. CR must be connected to
GND, and C and R pins must be left open.
3. Applies to the external clock which is supplied to CR during a master mode.
0.8*V_CC
0.5*V_CC
0.2*V_CC
t_r
t_H
t_L
Duty =
t_H
t_H + t_L
× 100%
t_f
Figure 14 External Clock
1119