Overview
The TLC555IDRG4 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 functionally interchangeable with the NE555 but offers several advantages, including higher input impedance, which allows the use of smaller timing capacitors for more accurate time delays and oscillations. The TLC555IDRG4 also features low power consumption across the full range of power-supply voltage and includes ESD protection exceeding 2000 V per MIL-STD-883C, Method 3015.2.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Supply Voltage (VDD) | 2 V to 15 V | |
| Trigger Voltage (VI(TRIG)) | Approximately 1/3 of VDD | |
| Threshold Voltage (VI(THRES)) | Approximately 2/3 of VDD | |
| Output Voltage (VOH) | VDD - 0.3 V (min), VDD - 0.4 V (max) | IOL = 5 mA |
| Output Voltage (VOL) | 0.07 V to 0.3 V | IOL = 1 mA, 25°C |
| Supply Current (IDD) | 170 µA to 350 µA | 25°C |
| Supply Current (IDD) Full Range | 500 µA to 600 µA | Full range |
| Power Dissipation Capacitance (CPD) | 80 pF to 90 pF | 25°C |
| Operating Temperature Range | –40°C to +85°C | TLC555I |
Key Features
- High input impedance allowing the use of smaller timing capacitors for more accurate time delays and oscillations.
- Low power consumption across the full range of power-supply voltage.
- ESD protection exceeding 2000 V per MIL-STD-883C, Method 3015.2.
- Functionally interchangeable with the NE555 but with improved characteristics.
- Available in various packages including SOIC, PDIP, SOP, and TSSOP.
- Control voltage terminal (CONT) to adjust trigger and threshold levels.
- Active low reset input to initiate a new timing cycle.
Applications
- Precision timing and pulse generation.
- Sequential timing and time delay generation.
- Pulse width modulation and pulse position modulation.
- Linear ramp generator.
- General-purpose timing applications up to 2.1 MHz.
- Automotive applications due to its high-reliability and qualification to automotive standards.
Q & A
- What is the operating frequency range of the TLC555IDRG4? The TLC555IDRG4 operates at frequencies up to 2 MHz.
- What is the trigger voltage level for the TLC555IDRG4? The trigger voltage level is approximately one-third of the supply voltage (VDD).
- How does the TLC555IDRG4 differ from the NE555? The TLC555IDRG4 has higher input impedance, allowing for smaller timing capacitors, and lower power consumption.
- What is the purpose of the control voltage terminal (CONT) in the TLC555IDRG4? The control voltage terminal allows adjustment of the trigger and threshold levels.
- What is the function of the reset input in the TLC555IDRG4? The reset input can override all other inputs and initiate a new timing cycle when set low.
- What are the typical applications of the TLC555IDRG4? Precision timing, pulse generation, sequential timing, time delay generation, pulse width modulation, and linear ramp generation.
- What is the operating temperature range for the TLC555I version? The operating temperature range for the TLC555I version is –40°C to +85°C.
- Does the TLC555IDRG4 have ESD protection? Yes, it has ESD protection exceeding 2000 V per MIL-STD-883C, Method 3015.2.
- What packages are available for the TLC555IDRG4? It is available in SOIC, PDIP, SOP, and TSSOP packages.
- Can the TLC555IDRG4 be used in automotive applications? Yes, it is suitable for automotive applications due to its high reliability and qualification to automotive standards.
