BU9728AKV Datasheet, PDF (4/10 Pages) Rohm – LCD driver for segment-type LCDs

Standard ICs
BU9728AKV
•^{Electrical characteristics}
DC characteristics (unless otherwise noted, VDD = 2.5 ~ 5.5V, VSS = 0V, Ta = 25°C)
Parameter
Symbol Min. Typ. Max. Unit
Input high level voltage
VIH1
0.8
× VDD
—
VDD
V
Input low level voltage
VIL1
0
LCD driver ON resistance^∗1 RON
—
—
0.2
× VDD
V
—
30
kΩ
Input low level current 1
IIL1
—
—
100
µA
Input low level current 2
IIL2
—
—
2
µA
Input high level current
IIH
–2
—
—
µA
Input capacitance
CIN
—
5
—
pF
—
0.05
1
µA
Current dissipation
IDD
—
40
80
µA
—
100 250
µA
∗1 Internal power supply impedance is not included in the LCD driver ON resistance.
∗2 All inputs, including V3 = 0V and OSC1, are fixed at either VDD or VSS.
∗3 Except for V3 = 0V, Rf = 470kΩ , and OSC1, all inputs are fixed at either VDD or VSS.
∗4 V3 = 0V, Rf = 470kΩ , fSCK = 200kHz
Conditions
Pin
—
OSC1, SD, SCK, C / D, CS
RESET
—
∆VON = 0.1V
SEG0 ~ 31, COM0 ~ 3
VIN = 0V
RESET
VIN = 0V
OSC1, SD, SCK, C / D, CS
VIN = VDD
—
In wait state^∗2
OSC1, SD, SCK, C / D, CS,
RESET
SD, SCK, C / D, CS
When display is operating^∗3 VDD
During access operation^∗4
AC characteristics (unless otherwise noted, VDD = 2.5 ~ 5.5V, VSS = 0V, Ta = 25°C)
Parameter
Symbol Min.
SCK rise time
tTLH
—
SCK fall time
tTHL
—
SCK cycle time
tCYC
800
Command wait time
tWAIT
800
SCK pulse width "H"
tWH1
300
SCK pulse width "L"
tWL1
300
Data setup time
tSU1
100
Data hold time
tH1
100
CS pulse width "H"
tWH2
300
CS pulse width "L"
tWL2
6400
CS set-up time
tSU2
100
CS hold time
tH2
100
C / D set-up time
tSU3
100
C / D hold time
tH3
100
C / D - CS time^∗5
tCCH
100
C / D - SCK time^∗5
tSCH
100
∗5 Only one (either one) of the conditions needs to be satisfied.
Typ.
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Max.
100
100
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Unit
Conditions
ns
—
ns
—
ns
—
ns
—
ns
—
ns
—
ns
—
ns
—
ns
—
ns
—
ns
—
ns
—
ns
—
ns Use rise for 8th CK of SCK as standard
ns Use CS riss as standard
ns Use rise for 8th CK of SCK as standard
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