ROHM BU9716BKV, BU9716BK Datasheet
1
Standard ICs
Picture cell driver for STN (LCD driver)
BU9716BK / BU9716BKV
The BU9716BK and BU9716BKV are man-machine interface ICs designed for applications such as multi-media
portable terminals.
Specifically, these products are used as driver ICs for operating mode display LCD panels in portable terminals,
household appliances, and other similar products. The number of display cells includes 32 segments and 3 commons, enabling drive of up to 96 cells.
•
Applications
•
Features
1) Up to 32 segment outputs and 3 common outputs
can be displayed, for a total of 96 segments.
2) 1 / 3 duty display.
3) Either 1 / 2 or 1 / 3 can be selected for power supply
for LCD display.
Multi-media portable terminals, POS terminals, ECR
terminals, short wave radios, telephones, cameras,
VCRs, movie projectors, car audio systems, and others
•
Absolute maximum ratings (Ta = 25°C, VSS = 0V)
∗
1 Reduced by 5mW for each increase in Ta of 1°C over 25°C .
∗
2 Reduced by 4mW for each increase in Ta of 1°C over 25°C .
Parameter Symbol Limits Unit
Power supply voltage V
DD V
BU9716BK
Pd
500
∗
1
mW
BU9716BKV 400
∗
2
Input voltage VIN – 0.3 ~ VDD + 0.3 V
Storage temperature
Topr
°C
Operating temperature
Tstg
°C
– 0.3 ~ + 7.0
– 40 ~ + 85
– 55 ~ + 125
dissipation
Power
•
Recommended operating conditions (Ta = 25°C, VSS = 0V)
Parameter Symbol Min. Typ. Max. Unit
Power supply voltage V
DD 4.5 — 5.5 V
Input voltage
V
DD1 0 2 / 3V
DDVDD
V
V
DD2 0 1 / 3V
DDVDD
V
2
Standard ICs BU9716BK / BU9716BKV
•
Block diagram
DATA Latch
Segment Driver
Common Driver
LCD Power
CTRL Logic
OSC
V
DD1
VDD2
RES
CS
DI
CK
OSC
COM1
COM2
COM3
S1
S2
S3
S4
S30
S31
S32
•
Pin assignments
COM1
S32
S31
S30
S29
S28
S27
S26
S25
S24
S23
S1S2S3
S4S5S6S7S8
S9
S10
S11
S22
S21
S20
S19
S18
S17
S16
S15
S14
S13
S12
COM2
COM3
RES
VDD
VDD1
VDD2
VSS
OSC
CS
CK
DI
33
23
2234
44 12
11
1
BU9716BK
COM1
S32
S31
S30
S29
S28
S27
S26
S25
S24
S23
N.C.
S1S2S3
S4S5S6S7S8
S9
S10
S11
N.C.
S22
N.C.
S21
S20
S19
S18
S17
S16
S15
S14
S13
S12
COM2
COM3
RES
VDD
VDD1
VDD2
VSS
OSC
CS
CK
DI
N.C.
36
25
24
37
48 13
12
1
BU9716BKV
3
Standard ICs BU9716BK / BU9716BKV
•
Pin descriptions (BU9716BK)
Pin name I / O
Processing
when not
used
1 - 32 S1 - S32 O OPEN
33
34
35
O OPEN
36 RES I V
DD
41 OSC — VSS
42 CS I Chip select input. At CS = H, data can be transferred. VSS
43 CK I Synchronous clock input for serial data transfer VSS
44 DI I Serial data input VSS
38 VDD1 — OPEN
39 V
DD2 — OPEN
Oscillator pin (for common and segment alternating waveforms)
Output pin for segment data. Outputs consistent LCD drive voltage to the
data corresponding to COM1 to COM3.
COM1
COM2
COM3
Pin No. Function
Internal reference voltage for LCD drive. In 1 / 2 bias mode, this is connected to V
DD2.
Internal reference voltage for LCD drive. In 1 / 2 bias mode, this is connected to V
DD1.
Common driver output. The frame frequency is f
C = (fOSC / 384) Hz
Reset input. At RES = L, internal data (including control data) is reset.
•
Electrical characteristics (unless otherwise noted, Ta = 25°C, VDD = 4.5V to 5.5V, VSS = 0V)
Parameter Symbol Min. Typ. Max. Unit Conditions
V
IH 0.8VDD — VDD V CS, CK, DI, RES
V
IL 0 — 0.2VDD V CS, CK, DI, RES
I
IH 0 — 6.0 µA
I
IL 0 — 6.0 µA
V
SOH ——VS1 ~ S32, IO = – 20µA
V
COH ——V
V
SOL — 1.0 — VS1 ~ S32, IO = – 20µA
V
COL — 1.0 — V
Intermediate output voltage
VCM1 —
1 / 2V
DD
± 1.0
— V
V
SM1 —
2 / 3V
DD
± 1.0
— VS1 ~ S32, 1 / 3Bias
V
CM2 —
2 / 3V
DD
± 1.0
— V
V
SM2 —
1 / 3V
DD
± 1.0
— VS1 ~ S32, 1 / 3Bias
V
CM3 —
1 / 3V
DD
± 1.0
— V
Power supply current
I
Q — 30 70 µA Low-power mode
I
DD — 100 300 µAfOSC = 38kHz
Input low level voltage
Input low level current
Output low level voltage
CS, CK, DI, RES, VI = VDD
CS, CK, DI, RES, VI = VSS
COM1 ~ COM3, IO = – 100µA
COM1 ~ COM3, I
O = – 100µA
COM1 ~ COM3, 1 / 2Bias
COM1 ~ COM3, 1 / 3Bias
COM1 ~ COM3, 1 / 3Bias
V
DD – 1.0
V
DD – 1.0
Input high level voltage
Input high level current
Output high level voltage
4
Standard ICs BU9716BK / BU9716BKV
•
Electrical characteristics
AC characteristics (unless otherwise noted, Ta = 25°C, V
DD = 4.5V to 5.5V, VSS = 0V)
Parameter Symbol Min. Typ. Max. Unit
Recommended external resistance R OSC — 47 — k
Ω
Recommended external capacitance C OSC — 1000 — pF
Guaranteed oscillation range OSC 19 38 76 kHz
Data setup time CK, DI 100 ——ns
Data hold time CK, DI 100 ——ns
CS setup time CS, CK 100 ——ns
CS hold time CS, CK 100 ——ns
CK 100 ——ns
CK 100 ——ns
Rise time CS, CK, DI ——300 ns
Fall time CS, CK, DI ——300 ns
f
OSC
tDS
tDH
tCS
tCH
tCKH
tCKL
Pin
CK "L" pulse width
t
r
tf
CK "H" pulse width
AC timing waveform
(1) When CK is stopped at “L”
(2) When CK is stopped at “H”
CS
CK
DI
tCS tCKH
tr tf
tCKL tCH
tDS tDH
0.8VDD
0.8VDD
0.5VDD
0.5VDD
0.8VDD
0.2VDD
0.2VDD
CS
CK
DI
tCS
tr tf
tDS tDH
0.8VDD
0.5VDD
0.5VDD
0.8VDD
tCKH tCKL tCH
0.2VDD
0.2VDD
0.2VDD
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