E-LS3811-V1.1 Datasheet, PDF (3/8 Pages) BOWIN ELECTRONIC CO. – 3 Keys Clock With 5 Daily Alarm

LS
Pin Assignment
DESIGNATION
B0, B1
F512, VCAP
VEE
T1, T2
COSCO
COSCI
VDD
GND
KMODE, KSET, KEL
BAL
PB
C[1:3]
S[1:17]
TYPE
OUTPUT
OUTPUT
OUTPUT
INPUT
OUTPUT
INPUT
POWER
POWER
INPUT(PL)
INPUT
INPUT(PH)
OUTPUT
OUTPUT
DESCRIPTION
Buzzer output
Doubler output
-1.5V
TEST pin
32KHz oscillator output
32KHz oscillator input
+1.5V power supply
Ground
Input key
Bonding option
Power up reset
LCD Common 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
LS3811
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
-
25
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
Version 1.1 (2005.06.03)
3