7

Data Sheet

AS2590

Rev. 1

Dec. 1993

Electrical Characteristics

Absolute Maximum Ratings

Positive Supply Voltage ...................................................................................................................-0.3V

≤ V

Input Current ................................................................................................................................................

± 25 mA

Digital Input Voltage .....................................................................................................V

Electrostatic Discharge (HBM) ........................................................................................................................

±500V

Storage Temperature ......................................................................................................................-65

°C to +125°C

Recommended Operating Conditions

Supply Voltage ..............................................................................................................................2.5V

≤ V

Oscillator Frequency ...............................................................................................................................32.768 kHz

Operating Temperature ....................................................................................................................- 25

°C to +70°C

DC Characteristics (Default conditions: recommended operating conditions; outputs unloaded; V

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Test circuit fig. 5

I

DD0

Standby Current

no clock running

1.5

µA

I

DD

Operating Current

T

50

µA

Note 1, note 2

V

IL

Input Voltage, Low

V

SS

0.2 V

DD

V

V

IH

Line Voltage, High

0.8 V

DD

V

DD

V

V

LCD

Output Voltage, Sink

I

0.4

V

R

BIAS

Oscillator Bias Resistor

2.2

M

Ω

Note 1: Segment and backplane outputs loaded with maximum 30 pF, power consumption of external voltage divider not

included, R

Note 2: Xtal parameters:

Rimax = 60 k

Ω (Rityp = 30 kΩ)

Qmin = 35 000

Co = 1.5 pF (capacitance across Xtal terminals)

fxtal = 32.768 kHz