Overview
The TLC555CPE4 is a monolithic timing circuit fabricated using Texas Instruments' LinCMOS™ technology. This timer is fully compatible with CMOS, TTL, and MOS logic and operates at frequencies up to 2 MHz. It is designed for low power consumption, typically 1 mW at a supply voltage of 5 V, making it suitable for a wide range of timing applications. The TLC555CPE4 is functionally interchangeable with the NE555 and has the same pinout, but it offers several advantages, including higher input impedance and the ability to use smaller timing capacitors, resulting in more accurate time delays and oscillations.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value | Unit |
|---|---|---|---|---|
| Supply Voltage (VDD) | 2 V to 15 V | 2 V | 15 V | V |
| Power Consumption at VDD = 5 V | 1 mW | - | - | mW |
| Output Current Capability (Sink) | 100 mA | - | - | mA |
| Output Current Capability (Source) | 10 mA | - | - | mA |
| Trigger Voltage | Approximately 1/3 of VDD | - | - | V |
| Threshold Voltage | Approximately 2/3 of VDD | - | - | V |
| Operating Temperature Range (TLC555C) | - | 0°C | 70°C | °C |
| Operating Temperature Range (TLC555I) | - | -40°C | 85°C | °C |
| ESD Protection | - | - | 1000 V | V |
Key Features
- 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 up to 100 mA, Source up to 10 mA
- 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 same pinout
- ESD protection exceeds 1000 V per ANSI/ESDA/JEDEC JS-001
Applications
- Precision timing
- Pulse generation
- Sequential timing
- Time delay generation
- Pulse width modulation
- Pulse position modulation
- Linear ramp generator
Q & A
- What is the typical power consumption of the TLC555CPE4 at 5 V supply voltage?
The typical power consumption is 1 mW at VDD = 5 V.
- What is the operating frequency range of the TLC555CPE4?
The TLC555CPE4 operates at frequencies up to 2 MHz.
- Is the TLC555CPE4 compatible with other logic types?
Yes, it is fully compatible with CMOS, TTL, and MOS logic.
- What are the trigger and threshold voltage levels for the TLC555CPE4?
The trigger level is approximately one-third of the supply voltage, and the threshold level is approximately two-thirds of the supply voltage.
- Can the TLC555CPE4 be used in high-reliability applications?
Yes, it is available in Q-temp automotive versions for high-reliability automotive applications.
- What is the ESD protection level of the TLC555CPE4?
The ESD protection exceeds 1000 V per ANSI/ESDA/JEDEC JS-001.
- How does the reset input function on the TLC555CPE4?
The reset input can override all other inputs and can be used to initiate a new timing cycle. If RESET is low, the flip-flop is reset and the output is low.
- What are some common applications of the TLC555CPE4?
Common applications include precision timing, pulse generation, sequential timing, time delay generation, pulse width modulation, pulse position modulation, and linear ramp generation.
- Can the TLC555CPE4 use smaller timing capacitors compared to other timers?
Yes, due to its high input impedance, the TLC555CPE4 can use smaller timing capacitors than the NE555 or LM555, resulting in more accurate time delays and oscillations.
- What is the typical output current capability of the TLC555CPE4?
The typical output current capability is up to 100 mA for sinking and up to 10 mA for sourcing.
