Overview
The TLC555-Q1 is a monolithic timing circuit fabricated using Texas Instruments' LinCMOS™ technology. This device is fully compatible with CMOS, TTL, and MOS logic and operates at frequencies up to 2 MHz. It is designed for general-purpose timing applications, offering high input impedance which supports the use of smaller timing capacitors, resulting in more accurate time delays and oscillations. The TLC555-Q1 is functionally interchangeable with the NE555 and has the same pinout, making it a versatile choice for various timing needs.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VDD) | 2 | 15 | V | |
| Operating Temperature (TA) | –40 | 125 | °C | |
| Trigger Voltage (VI(TRIG)) | 1.26 | 1.66 | 2.06 | V |
| Threshold Voltage (VIT) | 2.7 | 3.3 | 3.9 | V |
| High-Level Output Voltage (VOH) | 4.1 | 4.8 | V (at IOH = –1 mA) | |
| Low-Level Output Voltage (VOL) | 0.21 | 0.4 | V (at IOL = 8 mA) | |
| Sink Current (IOL) | 100 | mA | ||
| Source Current (IOH) | 10 | mA | ||
| Supply Current (IDD) | 180 | 700 | μA | |
| ESD Protection | ±1000 | V (HBM) |
Key Features
- AEC-Q100 qualified for automotive applications with a temperature range of –40°C to +125°C.
- Functional Safety-Capable with documentation available to aid in functional safety system design.
- 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 logic.
- Low supply current reduces spikes during output transitions.
- Single-supply operation from 2 V to 15 V.
- Functionally interchangeable with the NE555; has the same pinout.
Applications
- Precision timing.
- Pulse generation.
- Sequential timing.
- Time delay generation.
- Pulse width modulation.
- Pulse position modulation.
- Linear ramp generators.
- Automotive lamp and LED lighting.
- Telematics.
- Missing-pulse detectors.
- Sequential timers for initializing conditions during start-up in systems like computers and test equipment.
Q & A
- What is the operating temperature range of the TLC555-Q1?
The TLC555-Q1 operates over a temperature range of –40°C to +125°C.
- What is the supply voltage range for the TLC555-Q1?
The TLC555-Q1 can operate with a single supply voltage from 2 V to 15 V.
- Is the TLC555-Q1 compatible with other logic types?
Yes, the TLC555-Q1 is fully compatible with CMOS, TTL, and MOS logic.
- What is the typical power consumption of the TLC555-Q1 at 5 V?
The typical power consumption is 1 mW at VDD = 5 V.
- Can the TLC555-Q1 be used in automotive applications?
Yes, the TLC555-Q1 is AEC-Q100 qualified for automotive applications.
- What is the maximum sink and source current capability of the TLC555-Q1?
The TLC555-Q1 can sink up to 100 mA and source up to 10 mA.
- Is the TLC555-Q1 functionally interchangeable with the NE555?
Yes, the TLC555-Q1 is functionally interchangeable with the NE555 and has the same pinout.
- What types of timing modes can the TLC555-Q1 operate in?
The TLC555-Q1 can operate in both monostable and astable modes.
- How does the reset input function on the TLC555-Q1?
The reset input (RESET) can override all other inputs and is used to initiate a new timing cycle. If RESET is low, the flip-flop is reset and the output goes low.
- What are the ESD protection levels for the TLC555-Q1?
The TLC555-Q1 has ESD protection exceeding 1000 V per ANSI/ESDA/JEDEC JS-001.
