Preliminary

AS2591

Rev. 1.0

Page 10

May 1999

Electrical Characteristics

Recommended operating conditions unless otherwise specified.

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units

F

LCD

LCD Frame Frequency

61

64

67

Hz

t

OFF-TIMER

Off Timer

4.75

5

5.25

sec

f

BLINK

Blinking Frequency

BF = 00

BF = 01

BF = 10

BF = 11

1.33

2.00

0.67

1.00

Hz

Hz

Hz

Hz

R

COM

Output Impedance of

Backplane Outputs

150

kohm

R

SEG

Output Impedance of

Segment Outputs

150

kohm

Package Outline

44 Pin TQFP

See Package Catalogue

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