Epson SED1278D, Product Manual

3

SED1278F/D

 ELECTRICAL CHARACTERISTICS

 DC Characteristics

 Write Cycle

V

IH1

V

IL1

V

IH2

V

IL2

V

OH1

V

OL1

V

OH2

V

OL2

R

COM

R

SEG

I

IL

-I

P

I

OP

f

EXTCL

Duty

tr

EXTCL

tf

EXTCL

f

OSC

f

OSC

V

LCD

Symbol

I

OH

=-0.205mA

I

OL

=1.6mA

I

OH

=-0.04mA

I

OL

=0.04mA

|V

COM

-V

n

|=0.5V

|V

SEG

-V

n

|=0.5V

V

I

=0 to V

DD

V

DD

=5V

R

f

=91K    

±

2%

Ceramic filter

V

DD

-V

5

Condition

2.0

V

SS

V

DD

-1.0

V

SS

2.4

—

0.9V

DD

—

—

—

—

50

—

125

45

-

-

190

245

3.0

Min.

DB0~DB7

RS, R/W, E

OSC1

DB0~DB7

V

DD

COM1~16

SEG1~40

Applicable

Pin

—

—

—

—

—

—

—

—

2

2.5

—

125

250

50

—

—

270

250

—

0.5

Typ.

V

DD

0.8

V

DD

1.0

—

0.4

—

0.1V

DD

10

10

1

250

350

55

0.2

0.2

350

255

V

DD

0.8

Max.

V

V

V

V

V

V

V

V

k   

k   

   A

   A

mA

kHz

%

   S

   S

kHz

kHz

V

Unit

"H" level input voltage

(1)

"L" level input voltage

(1)

"H" level input voltage

(2)

"L" level input voltage

(2)

"H" level output voltage

(1)

"L" level output voltage

(1)

"H" level output voltage

(2)

"L" level output voltage 

(2)

Driver-on resistor (COM)

Driver-on resistor (SEG)

I/O leakage current

Pull-up MOS current

Supply current

External clock operation

External clock operating frequency

External clock duty

External clock rise time

External clock fall time

Internal clock operation (Rf oscillation)

Oscillation frequency

Internal clock operation (Ceramic filter oscillation)

Oscillation frequency

LCD driving voltage

Characteristic

Rf oscillation, from
external clock
V

DD

=5V, fosc=f

CP

=270kHz

(V

DD

=5.0V

±

10%, V

SS

=0V, Ta=-20 to 75˚C)

XSCL

LP

DO

 AC Characteristics
 Read Cycle

t

cycE

t

WEH

t

rE

, t

fE

t

AS

t

AH

t

RD

t

DHR

Symbol

500

220

—

40

10

—

20

Min.

—

—

—

—

—

—

—

Typ.

—

—

25

—

—

120

—

Max.

ns

ns

ns

ns

ns

ns

ns

Unit

C

L

=100pF

Condition

Enable cycle time

Enable "H" level pulse width

Enable rise/fall time

RS, R/W setup time

RS, R/W address hold time

Read data output delay

Read data hold time

Characteristic

(V

DD

=5.0V

±

10%, V

SS

=0V, Ta=-20 to 75˚C)

t

cycE

t

WEH

t

rE

, t

fE

t

AS

t

AH

t

DS

t

DH

Symbol

500

220

—

40

10

60

10

Min.

—

—

—

—

—

—

—

Typ.

—

—

25

—

—

—

—

Max.

ns

ns

ns

ns

ns

ns

ns

Unit

Condition

Enable cycle time

Enable "H" level pulse width

Enable rise/fall time

RS, R/W setup time

RS, R/W address hold time

Data setup time

Write data hold time

Characteristic

(V

DD

=5.0V

±

10%, V

SS

=0V,  Ta=-20 to 75˚C)