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Texas Instruments TLC555IP-P2
- Part No.:
- TLC555IP-P2
- Manufacturer:
- Texas Instruments
- Category:
- Programmable Timers and Oscillators
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TLC555IP-P2.pdf
- Description:
- TLC555 2.1-MHZ, 250MA, LOW-POWER
- Quantity:
- Payment:
- Shipping:
Inventory:38,800
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Product details
Overview
TLC555IP-P2 from Texas Instruments is a CMOS monolithic timer IC functionally interchangeable with the NE555 and featuring identical 8-pin PDIP pinout. It delivers rail-to-rail CMOS output swing, 100mA sink/10mA source capability, and operates from 2V to 15V supply. Its low 350µA typical supply current at 5V enables precision timing in battery-powered pulse generation and time-delay circuits.
For engineers reviewing the TLC555IP-P2 datasheet, TLC555IP-P2 pinout, TLC555IP-P2 application, or TLC555IP-P2 equivalent, key selection considerations include its 2MHz maximum astable frequency, 66.7% threshold/trigger ratio, discharge switch on-resistance <1.7Ω at 15V/100mA, ESD rating >1000V HBM, and compatibility with CMOS/TTL/MOS logic families.
Technical Context
The TLC555IP-P2 implements a dual-comparator architecture with an SR latch and high-current output stage, where THRES and TRIG inputs control flip-flop state based on voltage thresholds at ≈2/3 VDD and ≈1/3 VDD respectively. The CONT pin directly sets these thresholds and supports external voltage modulation.
Its discharge transistor operates as an open-collector output tied to GND when active, enabling capacitor discharge in monostable and astable configurations. RESET is active-low and overrides all other inputs, forcing OUT low and DISCH low regardless of internal state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 15V - supports single-supply operation across industrial and automotive rails without level-shifting. |
| Max Astable Frequency | 2.1MHz - enables high-speed PWM and clock generation up to audio band frequencies. |
| Output Sink Current | 100mA typical - drives LEDs, relays, or MOSFET gates directly without external buffers. |
| Threshold/Trigger Ratio | 2:1 (≈66.7% / ≈33.3%) - ensures stable timing intervals independent of VDD variation during charge/discharge cycles. |
| Supply Current @ 5V | 350µA typical - reduces power supply noise and extends battery life in portable timing applications. |
| ESD Rating | ±1000V HBM - meets ANSI/ESDA/JEDEC JS-001 for robust handling in manufacturing and field environments. |
| Operating Temperature | –40°C to +85°C - qualified for extended industrial temperature range operation. |
Pinout & Package
Package: 8-pin Plastic Dual Inline Package (PDIP), 9.81mm × 9.43mm footprint, through-hole mountable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Reference ground node | Common return path for all internal circuitry and external timing components; must be low-impedance. |
| TRIG (Pin 2) | Start-of-timing input | Active-low edge-sensitive trigger: falling below ≈1/3 VDD initiates timing cycle and sets output high. |
| OUT (Pin 3) | High-current output signal | CMOS rail-to-rail output capable of sourcing 10mA or sinking 100mA; drives logic or loads directly. |
| RESET (Pin 4) | Master reset override | Active-low asynchronous reset: forces OUT low and DISCH low regardless of TRIG/THRES state. |
| CONT (Pin 5) | Threshold control reference | Internally biases at ≈2/3 VDD; externally adjustable to modify trigger/threshold levels for custom timing ratios. |
| THRES (Pin 6) | End-of-timing input | Falling below ≈2/3 VDD resets latch and terminates timing interval; used with DISCH to control capacitor discharge. |
| DISCH (Pin 7) | Timing capacitor discharge path | Open-collector output tied to GND when active; discharges external timing capacitor during low-output phase. |
| VDD (Pin 8) | Power supply input | Single positive supply input (2V–15V); powers all internal comparators, latch, and output driver stages. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail CMOS output | Swings from GND to VDD - eliminates need for pull-up resistors and ensures full logic-level compatibility. |
| Low-power timing core | 350µA typical supply current at 5V - minimizes supply ripple and thermal load in dense PCB layouts. |
| High-impedance inputs | <150pA max input leakage - supports use of large-value timing resistors (>10MΩ) for long-duration delays. |
| Reset override priority | RESET > TRIG > THRES hierarchy - guarantees deterministic restart under fault or synchronization conditions. |
| Supply-voltage-independent timing | Timing interval stable across 2V–15V - eliminates recalibration when supply varies within operating range. |
Applications
| Precision Timing | Pulse Generation |
|---|---|
|
Use Scenario: Generating accurate one-shot delays in sensor interface circuits where microsecond-level repeatability is required. IC Role / Device Role / Timing Role: Monostable timer triggered by external event (e.g., interrupt signal), producing fixed-duration enable pulse. Use Value: 1.1×R×C timing formula with <1% drift over temperature ensures consistent delay accuracy without trimming. |
Use Scenario: Creating variable-duty-cycle square waves for LED dimming or motor speed control in embedded systems. IC Role / Device Role / Timing Role: Astable multivibrator with RA/RB/C network controlling frequency and duty cycle. Use Value: 2.1MHz max frequency and rail-to-rail output allow direct drive of logic-level MOSFETs or optocouplers. |
| Time Delay Generation | Pulse Width Modulation |
|
Use Scenario: Introducing calibrated startup delays in power management subsystems to sequence voltage rail activation. IC Role / Device Role / Timing Role: Monostable configured with RC network to generate fixed delay after power-on reset assertion. Use Value: Low 350µA quiescent current prevents loading of weak bias supplies during standby phases. |
Use Scenario: Implementing analog-compatible PWM for DAC-less audio synthesis or analog signal conditioning. IC Role / Device Role / Timing Role: Astable mode with CONT pin modulated by external control voltage to vary duty cycle dynamically. Use Value: 66.7% internal threshold ratio enables linear PWM response when CONT is driven with ramp waveform. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar timer IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NE555P | Higher 10mA typical supply current at 5V; bipolar output stage limits sink current to 200mA but increases crossover distortion. | Less suitable for low-power battery operation; higher output impedance affects rise/fall times with capacitive loads. | Choose NE555P only when legacy design reuse or cost sensitivity outweighs power/performance requirements. |
| LM555CN | Bipolar process; 12mA typical supply current; lower input impedance (~500kΩ) increases RC network loading error. | Reduced timing accuracy with high-value timing resistors; not recommended for sub-1% precision timing. | Select LM555CN only for non-critical timing where cost is primary constraint and supply current >10mA is acceptable. |
Compared with NE555P and LM555CN, the TLC555IP-P2 offers 3.5× lower supply current, CMOS-compatible rail-to-rail output, and 10× lower input bias current-making it optimal for precision, low-power, and mixed-signal timing applications where stability and efficiency are critical.
Availability
TLC555IP-P2 is available at Aetrix Electronics and suitable for precision timing, pulse generation, and time delay generation requiring stable component supply across industrial temperature ranges.
Supply support for TLC555IP-P2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies with over 50 years of innovation in precision timing and power management solutions.
The TLC555 product line was designed for general-purpose, low-power timing applications requiring CMOS compatibility, wide supply range, and high reliability in industrial and automotive environments.
FAQ
What is the maximum operating frequency of the TLC555IP-P2 in astable mode?
The TLC555IP-P2 achieves a maximum astable frequency of 2.1MHz under specified test conditions (RA = 470Ω, CT = 200pF, RB = 200Ω, VDD = 5V, TA = 25°C). This limit arises from internal propagation delays and discharge switch on-resistance. For reliable operation above 1MHz, minimize parasitic capacitance on THRES/TRIG pins and use low-inductance layout practices near DISCH and VDD.
How does the CONT pin affect timing behavior in the TLC555IP-P2?
The CONT pin in the TLC555IP-P2 directly sets the internal comparator reference voltages: THRES triggers at ≈CONT voltage, and TRIG triggers at ≈½×CONT. When left unconnected, it defaults to ≈2/3 VDD, yielding the standard 2:1 threshold/trigger ratio. Applying an external voltage allows dynamic adjustment of timing ratios-enabling variable-duty-cycle PWM or programmable delay scaling without changing RC components.
Can the TLC555IP-P2 replace the NE555 in existing designs without modification?
Yes-the TLC555IP-P2 is functionally interchangeable with the NE555 and shares identical 8-pin PDIP pinout and basic timing equations. However, due to its CMOS input structure and rail-to-rail output, designers must verify that external pull-up/pull-down networks (if present for NE555 bipolar inputs) are compatible or removed, and that load capacitance does not exceed 10pF on OUT/DISCH for optimal rise/fall times.
What is the recommended approach for using the RESET pin on the TLC555IP-P2?
When RESET functionality is unused, connect RESET directly to VDD. If driven by logic or a microcontroller, use a 10kΩ pull-up resistor to VDD to prevent floating states. Asserting RESET low forces OUT low and DISCH low immediately, overriding TRIG and THRES-making it ideal for emergency shutdown or synchronized restart. Ensure RESET pulse width exceeds 1µs for reliable latching.
Does the TLC555IP-P2 support operation at 2V supply voltage?
Yes-the TLC555IP-P2 is fully specified for operation down to 2V supply voltage (per Recommended Operating Conditions for I-suffix devices). At 2V, typical supply current is 250µA, threshold voltage is ~0.95V, and output high-level voltage reaches ~1.5V. Timing accuracy remains stable, though maximum frequency decreases to ~100kHz due to reduced slew rate and increased propagation delay.
TLC555IP-P2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- 555 Type, Timer/Oscillator (Single)
- Count:
- -
- Frequency:
- 2.1MHz
- Voltage - Supply:
- 3V ~ 15V
- Current - Supply:
- 900 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Supplier Device Package:
- 8-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
TLC555IP-P2 FAQ
1.How can I place an order for TLC555IP-P2 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC555IP-P2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TLC555IP-P2 reliable?
The price and inventory of TLC555IP-P2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC555IP-P2 is usually 5 days.
3.What payment methods are accepted for TLC555IP-P2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC555IP-P2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC555IP-P2?
TLC555IP-P2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC555IP-P2 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TLC555IP-P2?
For technical support, including TLC555IP-P2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC555IP-P2 requirements.
6.How does Aetrix verify that TLC555IP-P2 is sourced from the original manufacturer or authorized distributors?
All TLC555IP-P2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLC555IP-P2 meets industry standards.
7.What is the process for return or replacement of TLC555IP-P2?
All TLC555IP-P2 units undergo pre-shipment inspection (PSI). If there is an issue with TLC555IP-P2, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TLC555IP-P2 part is unused and in its original packaging.
Return procedure for TLC555IP-P2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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