bu9768ak ROHM Co. Ltd., bu9768ak Datasheet - Page 5

• Manufacturer Part Number: bu9768ak
• Description: Driver Segmented Module With Input Function
• Manufacturer: ROHM Co. Ltd.

•
•
(Note 1) Since DO is open drain output, the output delay time varies depending on the pull-up resistance.
(Note 2) Values measured for attachments of R = 47k , C = 1000pF.
Standard ICs
Rise time
Fall time
Data setup time
Data hold time
CS wait time
CS setup time
CS hold time
CK HIGH level time
CK LOW level time
D0 output delay time
Oscillation
guaranteed range
AC timing characteristics (V
Application example
(1 / 2 bias mode)
The pull-up resistor value should be set to a value so that the waveform is not destroyed by the wiring capacitance
or other factors.
Parameter
Symbol
t
t
t
t
f
s
h
s
h
t
OSC
CW
t
t
t
t
t
(1)
(2)
(1)
(2)
dl
u
d
H
L
-COM
DD
R
R
C
C
R
1
2
2
3
3
, C
= 4.5V to 6.0V, Ta = 25°C)
CS, CK, DI
CS, CK, DI
1
CS, CK
CS, CK
CS, CK
: Constants should be set to match
: 47k
: 1000pF (fosc = 38kHz)
:
: 1k ~ 10k
CK, DI
CK, DI
data communications.
OSC
R
DO
Pin
CK
CK
3
0.047 F
(fosc = 38kHz)
C
3
Min.
100
100
100
100
100
100
100
19
—
—
—
GND
C
1
Typ.
—
—
—
—
—
—
—
—
—
—
38
Fig. 2
R
C
1
2
V
RST
V
V
CS
CK
DI
DO
(Note 1)
DD
DD
DD
KI
Max.
R
1
2
300
300
200
1
OSC S
76
2
—
—
—
—
—
—
—
Key matrix (30 maximum)
KI
2
1
(EP
KI
1
) · · · · · · · · · · · · S
Unit
kHz
LCD panel
3
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
KI
4
BU9768AK / BU9768AKV
(Note 2)
COM
COM
COM
KI
KO
KO
KO
KO
KO
KO
5
40
1
2
3
1
2
3
4
5
6
5