My Inquiry
My Account
Texas Instruments NE555PWRE4
- Part No.:
- NE555PWRE4
- Manufacturer:
- Texas Instruments
- Category:
- Programmable Timers and Oscillators
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
NE555PWRE4.pdf
- Description:
- IC OSC SGL TIMER 100KHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,188
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
NE555PWRE4 from Texas Instruments is a precision bipolar timer IC operating in monostable or astable mode, with 0°C to +70°C temperature range, 4.5V–16V supply voltage, and TTL-compatible output capable of sinking or sourcing up to 200mA. It delivers timing intervals from microseconds to hours and supports adjustable duty cycle in oscillator configurations for industrial control and pulse-generation applications.
For engineers reviewing the NE555PWRE4 datasheet, NE555PWRE4 pinout, NE555PWRE4 application, or NE555PWRE4 equivalent, key selection criteria include its TSSOP-8 package, 200mA output drive, ±200mA output current rating, 50ppm/°C timing stability in monostable mode, and compatibility with standard 555 external RC networks for predictable time-delay design.
Technical Context
The NE555PWRE4 implements a classic bipolar 555 architecture with two comparators, an SR latch, and a push-pull output stage. Its internal resistor divider sets fixed trigger (≈⅓ VCC) and threshold (≈⅔ VCC) reference levels, while the CONT pin allows external adjustment of those thresholds.
Timing operation relies on external RC networks: monostable mode uses one resistor and capacitor for single-shot delay; astable mode uses two resistors and one capacitor to independently set frequency and duty cycle. The DISCH terminal provides open-collector discharge control synchronized with output state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5V to 16V - supports standard 5V and 12V logic rails without level-shifting |
| Output Current | ±200mA - drives relays, LEDs, or logic gates directly without external buffers |
| Timing Range | 10μs to hours - enables both high-speed pulse shaping and long-interval sequencing |
| Temp Range | 0°C to +70°C - qualified for commercial-grade embedded and instrumentation use |
| Timing Stability | 50 ppm/°C (monostable) - ensures consistent delay across ambient temperature variation |
| Rise/Fall Time | 100–300 ns - supports clean transitions up to ~100kHz fundamental frequency |
| Trigger Threshold | ≈⅓ VCC - defines precise start point for timing interval independent of supply drift |
Pinout & Package
TSSOP-8 (PW) package: 3mm × 4.4mm body, 0.65mm pitch, exposed pad optional, RoHS-compliant surface-mount footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Reference ground | Return path for all internal circuitry and external timing network |
| TRIG (Pin 2) | Start-of-timing input | Active-low edge-trigger initiates monostable interval when voltage drops below ≈⅓ VCC |
| OUT (Pin 3) | High-current output | Push-pull driver delivering TTL-compatible logic levels and up to 200mA load current |
| RESET (Pin 4) | Asynchronous reset | Active-low override forces output low and DISCH on regardless of TRIG/THRES state |
| CONT (Pin 5) | Threshold control | Direct access to internal ⅔ VCC node; bypass capacitor reduces noise sensitivity |
| THRES (Pin 6) | End-of-timing input | Monitors timing capacitor voltage; rising edge above ≈⅔ VCC terminates monostable interval |
| DISCH (Pin 7) | Discharge switch | Open-collector NPN output tied to GND when OUT is low; discharges external timing capacitor |
| VCC (Pin 8) | Power supply | Primary DC input; powers internal comparators, latch, and output stage (4.5V–16V range) |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable duty cycle | Independent control via RA and RB resistors in astable mode enables precise waveform shaping |
| TTL-compatible output | Direct interface with 74LS/74HC logic families at 5V supply without level translation |
| External RC timing | No crystal or trimmer required - timing accuracy determined solely by external passive component tolerances |
| Reset override capability | Hardware-level abort of active timing cycle via dedicated asynchronous RESET pin |
| Controllable thresholds | CONT pin allows dynamic modulation of trigger/threshold voltages for PWM and PPM applications |
Applications
| Pulse-Width Modulation | Missing-Pulse Detection |
|---|---|
Use Scenario: Generating variable-duty-cycle waveforms for motor speed control or LED dimming using analog modulation input. IC Role / Device Role / Timing Role: Monostable timer with CONT-pin voltage modulation alters effective threshold, changing pulse width per trigger event. Use Value: Enables analog-controlled digital output without microcontroller involvement; leverages NE555PWRE4's 200mA drive to power loads directly. | Use Scenario: Monitoring periodic clock or sensor signals to flag communication loss or sensor failure. IC Role / Device Role / Timing Role: Monostable circuit retriggered by each input pulse; output asserts only when inter-pulse gap exceeds RC-determined timeout. Use Value: Provides fail-safe detection with no firmware dependency; NE555PWRE4's 50ppm/°C stability ensures reliable timeout across temperature. |
| Sequential Timing | Industrial Control Logic |
Use Scenario: Power-up sequencing of multiple subsystems (e.g., FPGA configuration, ADC initialization, DAC calibration). IC Role / Device Role / Timing Role: Cascaded monostable stages where output of one NE555PWRE4 triggers the next, creating deterministic delay chain. Use Value: Eliminates need for complex programmable logic; NE555PWRE4's robust bipolar output drives subsequent stage inputs reliably. | Use Scenario: Implementing safety interlocks, machine cycle timers, or conveyor belt control in factory automation. IC Role / Device Role / Timing Role: Astable oscillator driving relay drivers or PLC input conditioning circuits with user-adjustable frequency/duty cycle. Use Value: NE555PWRE4's 4.5V–16V supply range matches industrial 12V/24V systems; 200mA sink/source handles solenoid and indicator loads directly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar timer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM555CMX/NOPB | Bipolar 555 with identical pinout and electrical specs; rated for 0°C to +70°C, SOIC-8 package | Same functional behavior but different thermal resistance (RθJA = 125.4°C/W vs NE555PWRE4's 164.2°C/W) and slightly higher quiescent current | Select LM555CMX/NOPB for board space where SOIC-8 is preferred over TSSOP-8; verify thermal margin in high-power-density layouts |
| SE555DR | Extended temperature version (–55°C to +125°C), same TSSOP-8 package, tighter timing stability (30 ppm/°C) | Supports military/aerospace and under-hood automotive environments where NE555PWRE4's 0°C–70°C range is insufficient | Choose SE555DR when operating outside commercial temperature limits or requiring improved thermal drift performance |
Compared with LM555CMX/NOPB, NE555PWRE4 offers lower thermal resistance in TSSOP-8 for better power dissipation in compact designs; versus SE555DR, it trades extended temperature range and tighter drift for cost and availability advantages in commercial systems.
Availability
NE555PWRE4 is available at Aetrix Electronics and suitable for industrial controls, pulse generators, and sequential timing applications requiring stable component supply and long-term production continuity.
Supply support for NE555PWRE4 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, embedded processing, and connectivity technologies with over 90 years of innovation history.
The NE555PWRE4 belongs to TI's legacy precision timer product line, designed for general-purpose timing functions in commercial-grade instrumentation, industrial equipment, and educational electronics where reliability and ease of use are critical.
FAQ
What is the maximum output current capability of the NE555PWRE4?
The NE555PWRE4 can sink or source up to 200mA at the OUT pin under recommended operating conditions. This rating applies across its full 4.5V–16V supply range and enables direct drive of relays, LEDs, and logic inputs without external buffers. Actual achievable current depends on VCC, ambient temperature, and PCB thermal design - consult the low-level/high-level output voltage curves in the NE555PWRE4 datasheet for derating guidance.
Can the NE555PWRE4 operate from a 3.3V supply?
No, the NE555PWRE4 requires a minimum supply voltage of 4.5V per its Recommended Operating Conditions. At 3.3V, internal comparator thresholds and output stage biasing fall outside specification, resulting in unreliable triggering, incorrect timing, or no output transition. For 3.3V systems, consider CMOS alternatives like the TLC555IPW or LMC555IMX, which are explicitly characterized down to 2V.
How does the CONT pin affect NE555PWRE4 operation?
The CONT pin on the NE555PWRE4 provides direct access to the internal ⅔ VCC node that sets the THRES comparator threshold. Applying an external voltage here overrides the default threshold, enabling functions like pulse-width modulation (PWM) and pulse-position modulation (PPM). Bypassing CONT to GND with a 10nF capacitor improves noise immunity during critical timing intervals.
What is the purpose of the DISCH pin on the NE555PWRE4?
The DISCH pin on the NE555PWRE4 is an open-collector NPN transistor output that connects to GND whenever the OUT pin is low. In monostable mode, it discharges the external timing capacitor after the interval ends; in astable mode, it discharges the capacitor during the low phase of oscillation. This pin must not be left floating - connect only to the timing capacitor or appropriate pull-up if unused.
Is the NE555PWRE4 pin-compatible with other 555 variants?
Yes, the NE555PWRE4 in TSSOP-8 (PW) package maintains identical pin numbering and function mapping with all industry-standard 555 timers including LM555, SA555, and SE555 in compatible packages (D, P, PS, PW). Pin-to-pin compatibility extends to electrical behavior in monostable and astable modes, though temperature range, timing stability, and supply current differ between variants.
NE555PWRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- 555 Type, Timer/Oscillator (Single)
- Count:
- -
- Frequency:
- 100kHz
- Voltage - Supply:
- 4.5V ~ 16V
- Current - Supply:
- 10 mA
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
NE555PWRE4 FAQ
1.How can I place an order for NE555PWRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for NE555PWRE4 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 NE555PWRE4 reliable?
The price and inventory of NE555PWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NE555PWRE4 is usually 5 days.
3.What payment methods are accepted for NE555PWRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NE555PWRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NE555PWRE4?
NE555PWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NE555PWRE4 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 NE555PWRE4?
For technical support, including NE555PWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NE555PWRE4 requirements.
6.How does Aetrix verify that NE555PWRE4 is sourced from the original manufacturer or authorized distributors?
All NE555PWRE4 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 NE555PWRE4 meets industry standards.
7.What is the process for return or replacement of NE555PWRE4?
All NE555PWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with NE555PWRE4, 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 NE555PWRE4 part is unused and in its original packaging.
Return procedure for NE555PWRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NE555PWRE4 Tags
-
NE555DR
Texas Instruments
-
SA555DR
Texas Instruments
-
NA555DR
Texas Instruments
-
SE555DR
Texas Instruments
-
NE555P
Texas Instruments
-
CD4541BM96
Texas Instruments
-
CD4541BE
Texas Instruments
-
TLC555QDR
Texas Instruments
-
TLC555IDR
Texas Instruments
-
TLC555QDRQ1
Texas Instruments
-
TPL5010DDCR
Texas Instruments
-
TLC555CP
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
