Overview
The TLC555CPW is a monolithic timing circuit produced by Texas Instruments, utilizing the TI LinCMOS™ technology. This timer is fully compatible with CMOS, TTL, and MOS logic and operates at frequencies up to 2 MHz. It is known for its high input impedance, which allows the use of smaller timing capacitors compared to the NE555 or LM555, resulting in more accurate time delays and oscillations. The device features low power consumption across the full range of power-supply voltage and includes a control voltage terminal (CONT) to adjust trigger and threshold levels. The TLC555CPW is functionally interchangeable with the NE555 but offers several enhancements, including higher accuracy and lower power consumption.
Key Specifications
| Parameter | Condition | Min | Max | Unit | |
|---|---|---|---|---|---|
| Supply Voltage (VDD) | 2 | 15 | V | ||
| Trigger Voltage (VI(TRIG)) | 25°C | 1.36 | 1.66 | 1.96 | V |
| Threshold Voltage (VIT) | 25°C | 2.8 | 3.3 | 3.8 | V |
| Reset Voltage (VI(RESET)) | 25°C | 0.4 | 1.1 | 1.5 | V |
| Supply Current (IDD) | 25°C, VDD = 5V | 170 | 350 | 500 | µA |
| Low-Level Output Voltage (VOL) | IOL = 1 mA, 25°C | 0.07 | 0.3 | V | |
| High-Level Output Voltage (VOH) | IOL = 1 mA, 25°C | VDD - 0.3 | V | ||
| Junction-to-Ambient Thermal Resistance (RθJA) | TSSOP Package | 135 | °C/W |
Key Features
- High input impedance allowing for smaller timing capacitors and more accurate time delays and oscillations.
- Low power consumption across the full range of power-supply voltage.
- CMOS output capable of swinging rail to rail.
- High output current capability.
- ESD protection exceeds 2000 V per MIL-STD-883C, method 3015.2.
- Available in various packages including SOIC, PDIP, SOP, and TSSOP.
- Functionally interchangeable with the NE555 but with enhanced performance).
Applications
- Precision timing).
- Pulse generation).
- Sequential timing).
- Time delay generation).
- Pulse width modulation).
- Pulse position modulation).
- Linear ramp generator).
Q & A
- What is the maximum operating frequency of the TLC555CPW?
The TLC555CPW operates at frequencies up to 2 MHz).
- What is the typical supply current of the TLC555CPW at 25°C and VDD = 5V?
The typical supply current is 350 µA).
- How does the TLC555CPW differ from the NE555 in terms of timing capacitors?
The TLC555CPW supports smaller timing capacitors due to its high input impedance, resulting in more accurate time delays and oscillations).
- What is the trigger voltage level for the TLC555CPW?
The trigger voltage level is approximately one-third of the supply voltage).
- Can the TLC555CPW be used in automotive applications?
Yes, it is available in Q-temp automotive configurations and meets high-reliability automotive standards).
- What is the ESD protection level of the TLC555CPW?
The ESD protection exceeds 2000 V per MIL-STD-883C, method 3015.2).
- What are the available packages for the TLC555CPW?
The TLC555CPW is available in SOIC, PDIP, SOP, and TSSOP packages).
- How does the reset input (RESET) function in the TLC555CPW?
The reset input (RESET) can override all other inputs and initiate a new timing cycle by setting the flip-flop and driving the output low when it is low).
- What is the junction-to-ambient thermal resistance for the TSSOP package of the TLC555CPW?
The junction-to-ambient thermal resistance for the TSSOP package is 135 °C/W).
- Is the TLC555CPW compatible with CMOS, TTL, and MOS logic?
Yes, the TLC555CPW is fully compatible with CMOS, TTL, and MOS logic).
