LS

LS3811

Version 1.1 (2005.06.03)

3

Pin Assignment

DESIGNATION

TYPE

DESCRIPTION

B0, B1

OUTPUT

Buzzer output

F512, VCAP

OUTPUT

Doubler output

VEE

OUTPUT

-1.5V

T1, T2

INPUT

TEST pin

COSCO

OUTPUT

32KHz oscillator output

COSCI

INPUT

32KHz oscillator input

VDD

POWER

+1.5V power supply

GND

POWER

Ground

KMODE, KSET, KEL

INPUT(PL)

Input key

BAL

INPUT

Bonding option

PB

INPUT(PH)

Power up reset

C[1:3]

OUTPUT

LCD Common output

S[1:17]

OUTPUT

LCD Segment output

Note: (PH) - pull high;

Absolute Maximum Ratings

Supply voltage Vdd - Vss..........................0 to 5V

Input voltage Vin.................................Vss to Vdd

Operating temperature Top .............-10°C to 60°C

Storing temperature Tst ...................-40°C to 70°C

Comments

Stress above those listed under absolute Maximum Ratings”

may cause permanent damage

to the device.

These are stress rating only.

Functional operation of this device at these or any

other conditions above those indicated in the operational sections of this specification is not implied

and exposure to absolute maximum rating conditions for extended periods may affect device

reliability.

D.C. Electrical Characteristics

(GND = 0V, Vdd = 1.5V, Ta = 25°C unless otherwise specified)

Parameter

Symbol

Min.

Typ.

Max.

Unit

Conditions

Supply Voltage

Vdd

1.25

1.5

1.75

V

Operating current

Idd

-

2

5

µA

No load

OSC. built-in cap

Cd

-

20

-

pF

OSC. trimmer cap

Ctrim

5

-

35

pF

Frequency stability

^f/f

-

-

10

ppM

Vdd=1.6-1.4

Buzzer output current

Ib

200

-

-

µA

Vbd-Vss=0.5

LCD frequency

Flcd

-

64

-

Hz

Segment current

Is

0.15

-

-

µA

Vseg=0.2V

Common current

Ic

3.0

-

-

µA

Vcom=0.2V