BU9729K 데이터 시트보기 (PDF) - ROHM Semiconductor

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BU9729K

Segment-type LCD driver

ROHM Semiconductor 

Standard ICs

BU9729K

•Recommended operating conditions (Ta = 25°C, VSS = 0V)

Parameter

Symbol Min.

Typ. Max.

Power supply voltage 1

VDD

2.5

—

5.5

Power supply voltage 2

VLCD

2.5

—

5.5

Oscillation frequency

fOSC

—

36

—

Unit

V

V

kHz

Conditions

—

The condition VLCD м VC м VSS must be satisfied.

Rf = 470kΩ

•Electrical characteristics

DC characteristics (unless otherwise noted, VDD = 2.5V to 5.5V, VSS = 0V, Ta = 25°C)

Parameter

Symbol Min.

Typ.

Max.

Unit

Conditions

Applicable pin

VIH1

0.8 ×

—

VDD

Input high level voltage

V

VDD

OSC1, SD, SCK, C / D, CS

—

VIL1

0

Input low level voltage

LCD driver on-resistance∗1 RON

—

—

0.2 ×

V

—

VDD

—

30

kΩ

∆VON = 0.1V

—

SEG1 ~ 32, COM1 ~ 4

Input high level current 2 IIL2

—

—

2

µA

VIN = 0

OSC1, SD, SCK, C / D, CS

Input low level current IIH

–2

—

—

µA

VIN = VDD

OSC1, SD, SCK, C / D ,CS

Input capacitance

CI

—

5

—

pF

—

SD,SCK, C / D, CS

—

0.05

1

µA

While quiescent∗2

—

8

25

µA

When “ALL OFF” is displayed

Current consumption IDD

VDD

—

40

80

µA

For display operations∗3

—

100

250

µA

For access operations∗4

∗1 The internal power supply impedance is not included in the LCD driver on-resistance.

∗2 All input is fixed at either VDD or VSS.

∗3 Except for Rf = 470kΩ and OSC1, all input is fixed at VDD or VSS.

∗4 Rf = 470kΩ, fSCK = 200kHz.

AC characteristics (unless otherwise noted, VDD = 2.5V to 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 HIGH tWH1

300

SCK pulse width LOW

tWL1

300

Data setup time

tSU1

100

Data hold time

tH1

100

CS pulse width HIGH

tWH2

300

CS pulse width LOW

tWL2

6400

CS setup time

tSU2

100

CS hold time

tH2

100

C / D setup time

tSU3

100

C / D hold time

tH3

100

C / D-CS time∗5

tCCH

100

C / D-SCK time∗5

tSCH

100

∗5 Should satisfy either one of these conditions.

Typ.

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Max.

100

100

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Unit

Conditions

ns

—

ns

—

ns

—

ns

—

ns

—

ns

—

ns

—

ns

—

ns

—

ns

—

ns

—

ns

—

ns

—

ns 8th rise of SCK used as reference

ns CS rise used as reference

ns 8th fall of SCK used as reference

4

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