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Diodes Incorporated SE555QS-13
- Part No.:
- SE555QS-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Programmable Timers and Oscillators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SE555QS-13.pdf
- Description:
- IC OSC SGL TIMER SO-8
- Quantity:
- Payment:
- Shipping:
Inventory:7,785
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Product details
Overview
SE555QS-13 from Diodes Incorporated is an automotive-grade precision timer IC implementing a bipolar 555 architecture in SO-8 package, operating from 4.5V to 15V supply, delivering ±200mA output drive, with AEC-Q100 qualification for under-hood timing control in engine management and body electronics.
For engineers reviewing the SE555QS-13 datasheet, SE555QS-13 pinout, SE555QS-13 application, or SE555QS-13 equivalent, key selection criteria include monostable/astable timing accuracy (±1% initial error), temperature stability (50 ppm/°C), supply voltage insensitivity (0.1%/V), and automotive-grade thermal robustness (–40°C to +125°C).
Technical Context
The SE555QS-13 integrates two comparators, an SR flip-flop, and a discharge transistor in a single bipolar process. Its internal threshold (2/3 VCC) and trigger (1/3 VCC) reference levels are adjustable via the CONT pin, enabling pulse-width and pulse-position modulation.
Operation supports both monostable (one-shot) and astable (free-running oscillator) modes. In monostable mode, timing interval tW = 1.1RAC; in astable mode, frequency f = 1.44/(RA + 2RB)C and duty cycle = RB/(RA + 2RB), all independent of VCC variation during timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5V to 15V - Enables direct interface with 5V and 12V automotive rails without level-shifting. |
| Output Drive Capability | ±200mA - Sufficient to directly drive relays, LEDs, or small solenoids without external buffers. |
| Timing Accuracy (Initial) | ±1% - Ensures predictable delay or frequency in safety-critical monostable timeout circuits. |
| Tempco (Monostable) | 50 ppm/°C - Limits timing drift to <1.25% over full –40°C to +125°C automotive range. |
| Reset Input Logic | Active-low, TTL-compatible (VRST ≤ 0.7V) - Allows direct connection to microcontroller GPIO or open-collector signals. |
| Discharge Pin Saturation | VDIS ≤ 200mV @ 4.5mA (5V) - Minimizes power loss and heat in RC timing networks during capacitor discharge. |
| Operating Temperature | –40°C to +125°C - Qualified per AEC-Q100 Grade 1 for under-dash and engine compartment use. |
Pinout & Package
SE555QS-13 is housed in a standard SO-8 (Small Outline-8) surface-mount package, 4.9mm × 6.0mm footprint, 1.27mm pitch, with gull-wing leads and RoHS-compliant matte-tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Primary return path for internal bias and output current; must be low-impedance for stable timing. |
| 2 TRIG | Trigger input | Falls below 1/3 VCC to set flip-flop and initiate timing; edge-sensitive with 10μs minimum pulse width. |
| 3 OUT | Output driver | Push-pull capable of sourcing/sinking up to 200mA; logic-high ≈ VCC – 2.5V @ 200mA sink. |
| 4 RESET | Asynchronous reset | Active-low override: forces output low and enables DISCH regardless of TRIG/THRES state. |
| 5 CONT | Control voltage input | Adjusts internal comparator thresholds; decoupling to ground improves noise immunity in PWM applications. |
| 6 THRES | Threshold input | Rises above 2/3 VCC to reset flip-flop and end timing interval; tied to TRIG in astable configuration. |
| 7 DISCH | Discharge switch collector | Low-impedance path to GND when OUT is low; discharges external timing capacitor in monostable/astable modes. |
| 8 VCC | Positive supply | Power input; requires local 0.01µF ceramic decoupling adjacent to pin for stable high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Microsecond-to-hour timing range | Supports RC time constants from ~10μs (RA=2kΩ, C=0.1μF) to >1 hour (RA=10MΩ, C=100μF) without external components. |
| Independent duty-cycle control (astable) | RA sets charge time, RB sets discharge time - enables precise waveform shaping for motor control or LED dimming. |
| TTL-compatible output drive | Direct interface with legacy 5V logic families; VOL ≤ 0.35V @ 5mA ensures reliable low-level recognition. |
| AEC-Q100 qualified & PPAP capable | Validated for automotive production: includes change control, IATF 16949 manufacturing, and full traceability. |
| Adjustable internal thresholds | CONT pin allows real-time modulation of timing interval - enables analog-controlled PWM, PPM, or missing-pulse detection. |
Applications
| Engine Control Unit (ECU) Timeout Monitoring | Body Control Module (BCM) Flasher Circuit |
|---|---|
|
Use Scenario: Monostable circuit detects absence of crankshaft position sensor pulses during engine cranking. IC Role / Device Role / Timing Role: Precision one-shot timer generating fixed-duration enable window for fuel injector drivers. Use Value: ±1% initial timing error ensures consistent fuel delivery across temperature and supply voltage variations. |
Use Scenario: Astable multivibrator drives turn-signal lamps at 1.2Hz with 50% duty cycle in vehicle lighting systems. IC Role / Device Role / Timing Role: Free-running oscillator with independent RA/RB control for accurate flash rate and lamp-on duration. Use Value: 50 ppm/°C tempco maintains flash frequency within ±3% over –40°C to +125°C ambient range. |
| Automotive HVAC Blower Speed Control | ADAS Camera Power Sequencing |
|
Use Scenario: Pulse-width modulated output controls MOSFET gate to regulate DC blower motor speed. IC Role / Device Role / Timing Role: CONT-pin-modulated monostable generating variable-width drive pulses synchronized to system clock. Use Value: Direct analog modulation of CONT pin enables smooth, jitter-free speed ramping without microcontroller intervention. |
Use Scenario: Sequential timer initiates camera sensor power-up, initialization, and communication handshake with 100ms–500ms delays. IC Role / Device Role / Timing Role: Cascaded monostable stages providing deterministic, supply-voltage-independent delay intervals. Use Value: Timing independence from VCC ensures reliable sequencing even during battery voltage sag during cold-cranking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision timer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NE555DR | Industrial grade (–40°C to +85°C), no AEC-Q100 qualification, higher initial timing error (±2%), lower output drive (±100mA). | Limited to cabin-located non-safety systems; unsuitable for engine bay or ASIL-B functions. | Select only for cost-sensitive non-automotive designs where extended temperature and qualification are unnecessary. |
| LM555CMX/NOPB | Commercial grade (0°C to +70°C), no automotive qualification, higher tempco (100 ppm/°C), no PPAP support. | Restricted to consumer or industrial bench equipment; not traceable for OEM production. | Use only for prototyping or non-production evaluation; not approved for automotive BOMs. |
Compared with NE555DR and LM555CMX/NOPB, SE555QS-13 provides verified automotive reliability, tighter timing accuracy, wider temperature margin, and full production support - making it the sole qualified choice for Tier-1 ECU, BCM, and ADAS subsystem timing.
Availability
SE555QS-13 is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS camera power sequencers requiring stable component supply across long automotive product lifecycles.
Supply support for SE555QS-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 solutions for automotive, industrial, and computing markets.
The SE555Q series belongs to Diodes' automotive-qualified precision analog portfolio, designed specifically for timing-critical functions in harsh-environment vehicle electronics where AEC-Q100 compliance and production traceability are mandatory.
FAQ
What is the maximum recommended timing capacitor value for SE555QS-13 in monostable mode?
The maximum recommended timing capacitor is 1000μF. Larger values increase leakage-related timing error and reduce reliability due to electrolytic capacitor aging. For stable sub-second delays, use 0.1μF to 10μF film or ceramic capacitors with ≤5% tolerance and low dielectric absorption.
Can SE555QS-13 operate reliably at 4.5V supply with full output drive?
Yes - SE555QS-13 is fully specified down to 4.5V. At this voltage, it delivers ±200mA output drive with VOL ≤ 0.4V (sink) and VOH ≥ 2.75V (source) at rated load, meeting TTL input thresholds and enabling direct interface with 5V logic and low-VCE(sat) power transistors.
How does the CONT pin affect timing accuracy in astable operation?
Applying voltage to CONT directly scales internal comparator thresholds, altering the 1/3 and 2/3 VCC reference points. This changes the capacitor charge/discharge crossover voltages, enabling precise duty-cycle tuning or analog modulation - but introduces ±0.5% additional timing error per 100mV deviation from nominal CONT voltage.
Is external decoupling required on the VCC pin, and what value is recommended?
Yes - a 0.01μF X7R ceramic capacitor placed within 2mm of the VCC and GND pins is mandatory. This suppresses high-frequency supply noise generated by internal comparator switching and prevents false triggering, especially in noisy automotive environments with shared power rails.
SE555QS-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- 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:
- -
- Voltage - Supply:
- 4.5V ~ 15V
- Current - Supply:
- 15 mA
- Operating Temperature:
- -45°C ~ 125°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
SE555QS-13 FAQ
1.How can I place an order for SE555QS-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SE555QS-13 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 SE555QS-13 reliable?
The price and inventory of SE555QS-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SE555QS-13 is usually 5 days.
3.What payment methods are accepted for SE555QS-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SE555QS-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SE555QS-13?
SE555QS-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SE555QS-13 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 SE555QS-13?
For technical support, including SE555QS-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SE555QS-13 requirements.
6.How does Aetrix verify that SE555QS-13 is sourced from the original manufacturer or authorized distributors?
All SE555QS-13 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 SE555QS-13 meets industry standards.
7.What is the process for return or replacement of SE555QS-13?
All SE555QS-13 units undergo pre-shipment inspection (PSI). If there is an issue with SE555QS-13, 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 SE555QS-13 part is unused and in its original packaging.
Return procedure for SE555QS-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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