TLC555QDR集成電路（IC）的可編程定時器振蕩器規(guī)格書PDF中文資料

TLC555QDR屬于集成電路（IC）的可編程定時器振蕩器。由德州儀器制造生產(chǎn)的TLC555QDR可編程定時器和振蕩器可以設置用來以指定頻率提供定時脈沖的器件。

1 Features

1? Very low power consumption:

– 1-mW typical at VDD = 5 V

? Capable of operation in astable mode

? CMOS output capable of swinging rail to rail

? High output current capability

– Sink: 100-mA typical

– Source: 10-mA typical

? Output fully compatible with CMOS, TTL, and

MOS

? Low supply current reduces spikes during output

transitions

? Single-supply operation from 2 V to 15 V

? Functionally interchangeable with the NE555; has

same pinout

? ESD protection exceeds 2000 V per MIL-STD-

883C, method 3015.2

? Available in Q-temp automotive

– High-reliability automotive applications

– Configuration control and print support

– Qualification to automotive standards

2 Applications

? Precision timing

? Pulse generation

? Sequential timing

? Time delay generation

? Pulse width modulation

? Pulse position modulation

? Linear ramp generator

3 Description

The TLC555 is a monolithic timing circuit fabricated

using the TI LinCMOS? process. The timer is fully

compatible with CMOS, TTL, and MOS logic and

operates at frequencies up to 2 MHz. Because of its

high input impedance, this device supports smaller

timing capacitors than those supported by the NE555

or LM555. As a result, more accurate time delays and

oscillations are possible. Power consumption is low

across the full range of power-supply voltage.

Like the NE555, the TLC555 has a trigger level equal

to approximately one-third of the supply voltage and a

threshold level equal to approximately two-thirds of

the supply voltage. These levels can be altered by

use of the control voltage terminal (CONT). When the

trigger input (TRIG) falls below the trigger level, the

flip-flop is set and the output goes high. If TRIG is

above the trigger level and the threshold input

(THRES) is above the threshold level, the flip-flop is

reset and the output is low. The reset input (RESET)

can override all other inputs and can be used to

initiate a new timing cycle. If RESET is low, the flipflop

is reset and the output is low. Whenever the

output is low, a low-impedance path is provided

between the discharge terminal (DISCH) and GND.

All unused inputs must be tied to an appropriate logic

level to prevent false triggering.