Diodes Incorporated NE555S-13

Overview

NE555S-13 from Diodes Incorporated is a precision timer IC operating in monostable or astable mode, delivering accurate time delays or oscillation with ±1% initial timing error, 50 ppm/°C temperature coefficient, and supply voltage range of 4.5 V to 16 V. It features TTL-compatible output capable of sourcing/sinking up to 200 mA, internal threshold/trigger comparators set at 2/3 VCC and 1/3 VCC, and a dedicated discharge pin for capacitor timing networks - widely used in pulse generation, missing-pulse detection, and PWM circuits.

For engineers reviewing the NE555S-13 datasheet, NE555S-13 pinout, NE555S-13 application, or NE555S-13 equivalent, this page provides verified functional behavior, SO-8 package layout, real-world timing accuracy metrics, and validated alternative parts for industrial control, power sequencing, and signal conditioning designs.

Technical Context

The NE555S-13 implements a bipolar-based analog-digital hybrid architecture with two independent comparators driving an SR flip-flop, a push-pull output stage, and an open-collector discharge transistor. Its internal reference voltages are fixed at precisely 1/3 and 2/3 of VCC, enabling predictable RC timing without external voltage dividers.

Operation supports both edge-triggered monostable timing (with reset override) and self-oscillating astable mode where RA and RB independently control charge/discharge paths. The CONT pin allows direct modulation of internal thresholds, enabling pulse-width and pulse-position modulation without external op-amps.

Key Specifications

Pinout & Package

NE555S-13 is housed in an SO-8 surface-mount package (4.90 mm × 6.00 mm, 1.27 mm pitch), optimized for automated assembly and thermal dissipation (θ_JA = 130 °C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision timer applications.

Compared with LM555CM/NOPB and SE555DR, NE555S-13 offers optimal balance of timing accuracy (±1%), low quiescent current (3–6 mA), and commercial-grade temperature support (0°C to 70°C), making it ideal for cost-sensitive industrial timers where precision and power efficiency are prioritized over extreme temperature operation.

Availability

NE555S-13 is available at Aetrix Electronics and suitable for industrial power sequencing, LED flasher control, missing pulse detection, and pulse width modulation requiring stable component supply and SO-8 surface-mount compatibility.

Supply support for NE555S-13 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for industrial, computing, and consumer markets with ISO/TS 16949 and IATF 16949 certified facilities.

The NE555 product line delivers industry-standard precision timing functionality in pin-compatible variants (NE/SA/NA) differentiated by temperature grade - designed specifically for cost-effective, robust timing solutions in non-automotive industrial systems.

FAQ

What is the maximum recommended timing capacitor value for NE555S-13 in monostable mode?

The datasheet specifies a maximum RA + RB resistance of ≈3.4 MΩ at 5 V and 10 MΩ at 15 V due to threshold current limits (≤30 nA). Using C = 100 µF and RA = 10 kΩ yields t_W ≈ 1.1 s - well within safe operating limits. Larger capacitors (e.g., 1000 µF) are usable with lower RA values, but leakage current becomes dominant above 100 µF and must be characterized per application.

Can NE555S-13 operate reliably at 3.3 V supply?

No - the absolute minimum supply voltage is 4.5 V per Recommended Operating Conditions. At 3.3 V, internal comparators fail to switch correctly, threshold/trigger levels collapse below specification, and output swing degrades below TTL-compatible thresholds. For 3.3 V systems, consider CMOS-based timers like TLC555 or LMC555 instead.

How does the CONT pin affect timing accuracy in astable mode?

Applying voltage to CONT directly alters the internal 2/3 and 1/3 VCC reference points - e.g., 2.5 V on CONT shifts thresholds to ~1.25 V and ~2.5 V. This enables linear PWM but introduces sensitivity to CONT source impedance; a 10 kΩ series resistor causes measurable timing drift. For best accuracy, drive CONT with low-impedance source (<1 kΩ) or bypass with 0.01 µF to GND.

Is NE555S-13 RoHS-compliant and halogen-free?

Yes - NE555S-13 is fully RoHS 3 compliant (2015/863/EU) with no intentionally added lead, and classified as "Green" per Diodes' definition: Br < 900 ppm, Cl < 900 ppm (total Br + Cl < 1500 ppm), Sb < 1000 ppm. This is verified in DS35112 Rev. 5–2 and documented on Diodes' quality portal.