Preliminary

AS2591

Rev. 1.0

Page 9

May 1999

Electrical Characteristics

Absolute Maximum Ratings*

Supply Voltage............................................................................................................................... -0.3

≤ V

DD

≤ 7V

Input Current..........................................................................................................................................+/- 25 mA

Input Voltage.....................................................................................................................-0.3V

≤ V

IN

≤ V

DD

+ 0.3V

Electrostatic Discharge...........................................................................................................................+/- 1000V

Storage Temperature Range........................................................................................................... -65 to +125°C

Total Power Dissipation ............................................................................................................................ 500mW

*Exceeding these figures may cause permanent damage. Functional operation under these conditions is not permitted.

Recommended Operating Range

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units

V

DD

Operating Voltage

3.2

4.0

4.8

V

V

LCD

LCD Reference Voltage

2.5

3.0

3.5

V

T

AMB

Ambient Operating Temp. Range

-25

+70

°C

f

OSC

Oscillator Frequency

32.768

kHz

DC Characteristics

Recommended operating conditions unless otherwise specified.

Symbol

Parameter

Conditions

Min.

Typ.*

Max.

Units

I

DD

Operating Supply Current

Unloaded

150

µA

I

DD0

Idle Current

Idle mode, oscillator not running

1

µA

V

33

Contrast Output Voltage at

COM1-4 and S1-2_n Pins

V

Contrast voltage low

Contrast voltage middle

Contrast voltage high

2.83

2.97

3.09

V

V

V

V

IL

Input Low Voltage

V

SS

0.3 V

DD

V

V

IH

Input High Voltage

0.7 V

DD

V

DD

V

* Typical figures are at 25°C and are for design aid only; not guaranteed and not subject to production testing.