TS3V556 datasheet(5/8 Pages) STMICROELECTRONICS

Nome de Peças	TS3V556

Descrição Electrónicos	3V LOW POWER DUAL TIMERS

Download	8 Pages

Scroll/Zoom	100%

Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

Logo

5 / 8 page

TS3V556

5/8

APPLICATION INFORMATION

MONOSTABLE OPERATION

In the monostable mode,the timer functions as a

one-shot. Referring to figure 2 the external capaci-

tor is initially held discharged by a transistor inside

the timer.

V

CC

Reset

Trigger

Out

R

C

Control Voltage

0.01 F

µ

1/2

TS3V556

Figure 2

CAPACITOR VOLTAGE = 2.0V/div

Ω

µ

t = 0.1 ms / div

INPUT = 2.0V/div

OUTPUT VOLTAGE = 5.0V/div

R = 9.1k , C = 0.01 F , R = 1.0k

L

Figure 3

TYPICAL CHARACTERISTICS

CC

SUPPLY VOLTAGE, V

(V)

300

200

100

04

8

12

16

Figure 1 :

Supply Current (each timer)

versus supply voltage.

The circuit triggers on a negative-going input signal

when the level reaches 1/3 VCC. Once triggered,the

circuit remains in this state until the set time has

elapsed,even if it is triggered again during this in-

terval. The duration of the output HIGH state is

given by t = 1.1 R x C.

Notice that since the charge rate and the threshold

level of the comparator are both directly propor-

tional to supply voltage, the timing interval is inde-

pendent of supply. Applying a negative pulse

simultaneously to the Reset terminal (pin 4 or 10)

and the Trigger terminal (pin 2 or 8) during the tim-

ing cycle discharges the external capacitor and

causes the cycle to start over. The timing cycle now

starts on the positive edge of the reset pulse. Dur-

ing the time the reset pulse is applied, the output is

driven to its LOW state.

When a negative trigger pulse is applied to the trig-

ger terminal, the flip-flop is set, releasing the short

circuit across the external capacitor and driving the

output HIGH. The voltage across the capacitor in-

creases exponentiallywith the time constant

τ =R x

C.

When the voltage across the capacitor equals 2/3

VCC, the comparator resets the flip-flop which then

discharges the capacitor rapidly and drives the out-

put to its LOW state.

Figure 3 shows the actual waveforms generated in

this mode of operation.

When Reset is not used, it should be tied high to

avoid any possible or false triggering.

Nº de peça semelhante - TS3V556

Fabricante Electrônico	Nome de Peças	Folha de dados	Descrição Electrónicos
STMicroelectronics	TS3V555	74Kb / 8P	3V LOW POWER SINGLE TIMERS
STMicroelectronics	TS3V555I	74Kb / 8P	3V LOW POWER SINGLE TIMERS

More results

Descrição semelhante - TS3V556

Fabricante Electrônico	Nome de Peças	Folha de dados	Descrição Electrónicos
STMicroelectronics	TS3V555	74Kb / 8P	3V LOW POWER SINGLE TIMERS
STMicroelectronics	TS556C	98Kb / 11P	LOW POWER DUAL CMOS TIMERS
Linear Technology	LTC2284	703Kb / 24P	Dual 14-Bit, 105Msps Low Power 3V ADC
	LTC2281	493Kb / 24P	Dual 10-Bit, 125Msps Low Power 3V ADC
	LTC2284	712Kb / 24P	Dual 14-Bit, 105Msps Low Power 3V ADC
	LTC2295	676Kb / 24P	Dual 14-Bit, 10Msps Low Power 3V ADC
	LTC2282	456Kb / 24P	Dual 12-Bit, 105Msps Low Power 3V ADC
Texas Instruments	NA556	412Kb / 15P	[Old version datasheet] DUAL PRECISION TIMERS
Linear Technology	LTC2295	682Kb / 24P	Dual 14-Bit, 10Msps Low Power 3V ADC
Linear Technology	LTC2283	580Kb / 24P	Dual 12-Bit, 125Msps Low Power 3V ADC

More results

TS3V556 Folha de dados(PDF) 5 Page - STMicroelectronics

TS3V556 Folha de dados(HTML) 5 Page - STMicroelectronics

Nº de peça semelhante - TS3V556

Descrição semelhante - TS3V556

Html Pages

1 2 3 4 5 6 7 8

Folha de dados Download

Ligação URL