TLC552 - 双路 LinCMOS(TM) 定时器

TLC552是TI德州仪器公司的一款无产品，TLC552是双路 LinCMOS(TM) 定时器，本站介绍了TLC552的封装应用图解、特点和优点、功能等，并给出了与TLC552相关的TI元器件型号供参考。

TLC552 - 双路 LinCMOS(TM) 定时器 - 无 - 定时器 - 德州仪器

产品描述

The TLC552 is a dual monolithic timing circuit fabricated using TI LinCMOSTM process, which provides full compatibility with CMOS, TTL, and MOS logic and operation at frequencies up to 2 MHz. Accurate time delays and oscillations are possible with smaller, less-expensive timing capacitors than the NE555 because of the high input impedance. Power consumption is low across the full range of power supply voltages.

Like the NE556, the TLC552 has a trigger level approximately one-third of the supply voltage and a threshold level approximately two-thirds of the supply voltage. These levels can be altered by use of the control voltage terminal. When the trigger input falls below the trigger level, the flip-flop is set and the output goes high. If the trigger input is above the trigger level and the threshold input is above the threshold level, the flip-flop is reset and the output is low. The reset input can override all other inputs and can be used to initiate a new timing cycle. If the reset input is low, the flip-flop is reset and the output is low. Whenever the output is low, a low-impedance path is provided between the discharge terminal and ground.

While the CMOS output is capable of sinking over 100 mA and sourcing over 10 mA, the TLC552 exhibits greatly reduced supply-current spikes during output transitions. This minimizes the need for the large decoupling capacitors required by the NE556.

These devices have internal electrostatic discharge (ESD) protection circuits that will prevent catastrophic failures at voltages up to 2000 V as tested under MIL-STD-883C, Method 3105.2. However, care should be exercised in handling these devices as exposure to ESD may result in a degradation of the device parametric performance.

All unused inputs should be tied to an appropriate logic level to prevent false triggering.

The TLC552C is characterized for operation from 0°C to 70°C.

产品特性

Very Low Power Consumption . . . 2 mW Typ 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 Typ Source 10 mA Typ
Output Fully Compatible With CMOS, TTL, and MOS
Low Supply Current Reduces Spikes During Output Transitions
High-Impedance Inputs . . . 1012 Typ
Single-Supply Operation From 1 V to 18 V
Functionally Interchangeable With the NE556; Has Same Pinout

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