TS555ID STMicroelectronics, TS555ID Datasheet - Page 9

• Manufacturer Part Number: TS555ID
• Description: IC TIMER CMOS SINGLE LP 8-SOIC
• Manufacturer: STMicroelectronics
• Type: 555 Type, Timer/Oscillator (Single)r

Specifications of TS555ID

• Frequency: 2.7MHz
• Voltage - Supply: 2 V ~ 16 V
• Current - Supply: 65µA
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 8-SOIC (3.9mm Width)
• Number Of Internal Timers: 1
• Supply Voltage (max): 16 V
• Supply Voltage (min): 2 V
• Maximum Power Dissipation: 715 mW
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Propagation Delay (max): 100 ns (Typ) @ 3 V to 5 V
• Current, Supply: 65 uA (Typ.)
• Number Of Pins: 8
• Package Type: SO8
• Power Dissipation: 715 mV
• Temperature, Operating: -40 °C
• Temperature, Storage: 125 °C
• Time, Fall, Output: 20 ns (Typ.)
• Time, Rise, Output: 25 ns (Typ.)
• Voltage, Control: 1.3 V (Typ.)
• Voltage, Output, High Level: 1.9 V (Typ.)
• Voltage, Output, Low Level: 0.1 V (Typ.)
• Voltage, Supply: 18 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Count: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-3045-5

ASTABLE OPERATION
When the circuit is connected as shown in figure 4
(pin 2 and 6 connected) it triggers itself and free
runs as a multivibrator. The external capacitor
charges through R
through R
cisely set by the ratio of these two resistors.
In the astable mode of operation, C charges and
discharges between 1/3 V
the triggered mode, the charge and discharge
times and therefore frequency, are independent of
the supply voltage.
Figure 4:
Voltage
0.01 F
Control
V
CC
Out
B
only. Thus the duty cycle may be pre-
5
Reset
3
A
1
4
TS555
and R
CC
8
and 2/3 V
B
2
and discharges
7
6
CC
R
R
. As in
C
B
A
Figure 5 shows actual waveforms generated in
this mode of operation.
The charge time (output HIGH) is given by :
t1 = 0.693 (R
and the discharge time (output LOW) by :
t2 = 0.693 x R
Thus the total period T is given by :
T = t1 + t2 = 0.693 (R
The frequency of oscillation is then :
The duty cycle is given by :
Figure 5:
D =
f =
-- - =
T
1
---------------------------
R A
RB
------------------------------------- -
( RA
+
R = R = 4.8 k , C = 0.1 F , R = 1.0k
2 RB
A
t = 0.5 ms / div
OUTPUT VOLTAGE = 5.0V/div
CAPACITOR VOLTAGE = 1.0V/div
A
+
1.44
B
+ R
B
2 R B C
x C
B
) C
A
+ 2R
B
) C
L
TS555
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