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Texas Instruments NE555DR1G4
- Part No.:
- NE555DR1G4
- Manufacturer:
- Texas Instruments
- Category:
- Programmable Timers and Oscillators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
NE555DR1G4.pdf
- Description:
- SINGLE PRECISION TIMER
- Quantity:
- Payment:
- Shipping:
Inventory:3,262
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Product details
Overview
NE555DR1G4 from Texas Instruments is a precision bipolar 555 timer IC operating in monostable or astable mode, featuring TTL-compatible output capable of sinking or sourcing up to 200 mA, 4.5 V to 16 V supply range, and timing intervals from microseconds to hours. It serves as a general-purpose timing controller in industrial controls, pulse-shaping circuits, and missing-pulse detection systems.
For engineers reviewing the NE555DR1G4 datasheet, NE555DR1G4 pinout, NE555DR1G4 application, or NE555DR1G4 equivalent, this page delivers verified electrical characteristics, functional mode behavior, package-specific terminal roles, and real-world implementation guidance for reliable circuit integration.
Technical Context
The NE555DR1G4 implements a dual-comparator architecture with an SR latch and high-current output stage, where trigger (TRIG) and threshold (THRES) inputs reference internal voltage dividers at ≈⅓ and ≈⅔ VCC respectively. The control voltage (CONT) pin allows external adjustment of these thresholds.
In monostable operation, timing is set by one resistor and capacitor (tW ≈ 1.1 × RAC); in astable mode, frequency and duty cycle are independently controlled via two resistors and one capacitor (f ≈ 1.44 / [(RA + 2RB)C], duty = (RA + RB) / (RA + 2RB)). Reset (RESET) is active-low and overrides all other inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 16 V - supports standard TTL and industrial logic rails without level shifting |
| Output Drive Capability | ±200 mA - directly drives relays, LEDs, or logic gates without external buffers |
| Timing Accuracy | ±1% typical initial tolerance - enables precise delay generation without calibration |
| Temperature Range | 0°C to +70°C - validated for commercial-grade embedded and instrumentation applications |
| Trigger Threshold | ≈⅓ VCC - defines start-of-timing condition; stable over temperature and supply variation |
| Threshold Level | ≈⅔ VCC - defines end-of-timing condition; matched to trigger for consistent hysteresis |
| Rise/Fall Time | 100–300 ns (CL = 15 pF) - ensures clean digital transitions in high-speed timing circuits |
Pinout & Package
NE555DR1G4 is supplied in an 8-pin SOIC (D) package with gull-wing leads, 1.27 mm pitch, and JEDEC MS-012AC compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return path for internal comparators, latch, and output stage |
| TRIG (Pin 2) | Timing start input | Active-low edge-sensitive input; triggers monostable on voltage < ≈⅓ VCC |
| OUT (Pin 3) | High-current output | Push-pull driver capable of sourcing/sinking up to 200 mA |
| RESET (Pin 4) | Asynchronous reset | Active-low override; forces output low and discharge switch on regardless of TRIG/THRES state |
| CONT (Pin 5) | Threshold reference control | Allows external voltage to adjust internal comparator thresholds; bypass capacitor improves noise immunity |
| THRES (Pin 6) | Timing end input | Ends monostable interval when voltage > ≈⅔ VCC; sets astable discharge point |
| DISCH (Pin 7) | Timing capacitor discharge | Open-collector output tied to GND when OUT is low; discharges external timing capacitor |
| VCC (Pin 8) | Positive supply | Power input for internal biasing, comparators, and output stage; decoupling recommended |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable duty cycle in astable mode | Independent control via RA and RB resistors enables 50%–99% waveform duty cycles |
| TTL-compatible output interface | Direct connection to 74LS/74HC logic families at 5 V supply without level translation |
| Microsecond-to-hour timing range | RC network scalability supports delays from 10 µs to >1 hour with standard components |
| Reset override functionality | Guarantees deterministic restart during timing cycles-critical for safety-critical sequencing |
| Supply-voltage-insensitive timing | Timing interval remains stable across 4.5–16 V due to ratiometric internal references |
Applications
| Industrial Control Sequencing | Pulse-Width Modulation (PWM) |
|---|---|
Use Scenario: Generating timed enable signals for motor starters, solenoid actuators, or conveyor belt logic in factory automation panels. IC Role / Device Role / Timing Role: Monostable timer providing fixed-duration gate pulses synchronized to system clock edges. Use Value: Eliminates need for microcontroller-based timing, reducing BOM cost and firmware complexity while ensuring deterministic response. | Use Scenario: Converting analog control voltages into variable-duty-cycle drive signals for LED dimming or DC motor speed regulation. IC Role / Device Role / Timing Role: Astable oscillator with CONT pin modulated by external voltage to vary output pulse width. Use Value: Achieves analog-controlled PWM using only passive components and one IC-no DAC or processor required. |
| Missing-Pulse Detection | Frequency Division |
Use Scenario: Monitoring serial data streams or encoder outputs for signal loss or intermittent faults in test equipment or safety interlocks. IC Role / Device Role / Timing Role: Monostable retriggered by each input pulse; output asserts only when inter-pulse gap exceeds RC timeout. Use Value: Detects open-circuit sensor failures or broken communication links with sub-millisecond latency and no software overhead. | Use Scenario: Deriving lower-frequency clock signals (e.g., 1 Hz from 1 kHz) for display multiplexing or power management sequencing. IC Role / Device Role / Timing Role: Monostable triggered by every Nth input edge using external logic to gate TRIG input. Use Value: Provides integer division ratios (e.g., ÷2, ÷3) with minimal component count and guaranteed edge alignment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar timer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM555CN/NOPB | Same pinout, identical electrical specs, PDIP-8 package instead of SOIC-8 | Preferred for through-hole prototyping or legacy board designs requiring DIP footprint | Select when mechanical compatibility with breadboards or socketed DIP layouts is required |
| TLC555CP | CMOS version; lower supply current (100 µA vs 10 mA), wider VCC range (2 V–15 V), but reduced output drive (15 mA) | Suitable for battery-powered systems needing ultra-low quiescent current and rail-to-rail timing | Select when power efficiency outweighs drive strength, and load current ≤15 mA |
Compared with LM555CN/NOPB, NE555DR1G4 offers surface-mount reliability and thermal performance in SOIC; compared with TLC555CP, it delivers 13× higher output current at the cost of higher quiescent consumption-making NE555DR1G4 optimal for robust industrial timing where drive capability is critical.
Availability
NE555DR1G4 is available at Aetrix Electronics and suitable for industrial controls, pulse-shaping circuits, and missing-pulse detection requiring stable component supply across long production lifecycles.
Supply support for NE555DR1G4 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and broad technical support.
The NE555DR1G4 belongs to TI's legacy precision timer product line, engineered for robust, low-cost, and field-proven timing functions in commercial-grade instrumentation, automation, and consumer electronics.
FAQ
What is the maximum output current capability of the NE555DR1G4?
The NE555DR1G4 can sink or source up to 200 mA at VCC = 15 V, with low-level output voltage remaining ≤0.75 V at 50 mA sink. At 5 V supply, it sustains 5 mA sink with VOL ≤0.35 V. This high drive strength allows direct interfacing with electromechanical loads without external transistors-confirming NE555DR1G4 suitability for relay drivers and LED arrays.
Can the NE555DR1G4 operate from a 3.3 V supply?
No-the NE555DR1G4 has a minimum recommended supply voltage of 4.5 V per its datasheet. Operation below 4.5 V risks unreliable comparator switching, degraded output swing, and undefined timing behavior. For 3.3 V systems, consider the TLC555CP (2 V–15 V range) or ICM7555 (2.7 V–15 V), both CMOS alternatives with compatible pinouts.
How does the RESET pin function in the NE555DR1G4?
The RESET pin (Pin 4) is active-low and asynchronously forces the internal SR latch to reset, driving OUT low and enabling DISCH to ground-regardless of TRIG or THRES states. When unused, it must be tied to VCC via a pullup; floating operation causes erratic triggering. This behavior makes NE555DR1G4 ideal for emergency stop circuits or synchronized system resets.
What is the typical timing accuracy of the NE555DR1G4 over temperature?
The NE555DR1G4 exhibits a temperature coefficient of 50 ppm/°C for monostable timing intervals across 0°C to +70°C. Combined with ±1% initial resistor tolerance and 5% capacitor tolerance, total timing error remains within ±3% over full commercial temperature range-sufficient for non-critical delay generation without trimming.
Is the NE555DR1G4 pin-compatible with the original Signetics NE555?
Yes-the NE555DR1G4 maintains full pin, electrical, and functional compatibility with the original Signetics NE555 and all industry-standard 555 timers (e.g., LM555, UA555). Its SOIC-8 package matches TI's standardized D package footprint, enabling drop-in replacement in existing designs without layout changes.
NE555DR1G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- 555 Type, Timer/Oscillator (Single)
- Count:
- -
- Frequency:
- 1mHz ~ 100kHz
- Voltage - Supply:
- 4.5V ~ 16V
- Current - Supply:
- 10 mA
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
NE555DR1G4 FAQ
1.How can I place an order for NE555DR1G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for NE555DR1G4 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 NE555DR1G4 reliable?
The price and inventory of NE555DR1G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NE555DR1G4 is usually 5 days.
3.What payment methods are accepted for NE555DR1G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NE555DR1G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NE555DR1G4?
NE555DR1G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NE555DR1G4 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 NE555DR1G4?
For technical support, including NE555DR1G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NE555DR1G4 requirements.
6.How does Aetrix verify that NE555DR1G4 is sourced from the original manufacturer or authorized distributors?
All NE555DR1G4 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 NE555DR1G4 meets industry standards.
7.What is the process for return or replacement of NE555DR1G4?
All NE555DR1G4 units undergo pre-shipment inspection (PSI). If there is an issue with NE555DR1G4, 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 NE555DR1G4 part is unused and in its original packaging.
Return procedure for NE555DR1G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NE555DR1G4 Tags
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NE555DR
Texas Instruments
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SA555DR
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NA555DR
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SE555DR
Texas Instruments
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NE555P
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CD4541BM96
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CD4541BE
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TLC555QDR
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TLC555IDR
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TLC555QDRQ1
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TPL5010DDCR
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TLC555CP
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