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Analog Devices Inc. LTC6993HS6-3#WTRPBF
- Part No.:
- LTC6993HS6-3#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Multivibrators
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC6993HS6-3#WTRPBF.pdf
- Description:
- TIMERBLOX: MONO PULSE GEN (ONE S
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC6993HS6-3#WTRPBF from Analog Devices is a falling-edge–triggered, non-retriggerable monostable multivibrator (one-shot) with programmable pulse width from 1µs to 33.6 seconds. It operates from 2.25V to 5.5V, consumes as low as 55µA at 2.25V/800kΩ, and delivers ±20mA CMOS output drive in a 6-lead TSOT-23 package rated for –40°C to 125°C. It is used in missing-pulse detection and watchdog timer circuits requiring precise, temperature-stable timing.
For engineers reviewing the LTC6993HS6-3#WTRPBF datasheet, LTC6993HS6-3#WTRPBF pinout, LTC6993HS6-3#WTRPBF application, or LTC6993HS6-3#WTRPBF equivalent, this page provides verified timing accuracy specs, DIVCODE–dependent NDIV mapping, trigger polarity behavior, automotive-grade thermal validation, and real-world envelope detection use cases.
Technical Context
The LTC6993HS6-3#WTRPBF implements a master oscillator with 1µs base period, programmable via ISET current sourced from the SET pin (regulated at 1.00V ±30mV). Pulse width tOUT = NDIV × RSET / 50kΩ × 1µs, where NDIV is selected by a 4-bit DIVCODE derived from VDIV voltage on the DIV pin.
It features hysteresis on the TRIG input (VTRIG(RISING) ≈ 0.55·V+ + 185mV; VTRIG(FALLING) ≈ 0.48·V+ – 155mV), fast 11–28ns propagation delay, and ±0.006%/°C pulse width drift over temperature for NDIV ≥ 512 - all validated across its –40°C to 125°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Pulse width range | 1µs to 33.6 seconds - covers ultra-short diagnostics and long-duration system timeouts without external RC networks. |
| Trigger polarity | Falling-edge only - ensures reliable activation on signal decay, critical for missing-pulse detection in noisy environments. |
| Retrigger capability | Non-retriggerable - prevents pulse extension during ongoing activity; output completes fully before accepting next trigger. |
| Supply voltage | 2.25V to 5.5V - supports direct interface with Li-ion battery systems (2.7–4.2V) and 3.3V/5V logic rails without level shifting. |
| Temp range | –40°C to 125°C - qualified per AEC-Q100 for under-hood automotive applications including engine control and transmission modules. |
| Output drive | ±20mA CMOS - directly drives LEDs, small relays, or logic inputs without buffer stages. |
| Pulse accuracy | ±2.3% for tOUT > 512µs - enables deterministic timing in safety-critical watchdog circuits where deviation must be bounded. |
Pinout & Package
Package: 6-lead Plastic TSOT-23 (0.95mm height), RoHS-compliant, lead-free finish. Exposed pad not present. Thermal resistance θJA = 192°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TRIG (Pin 1) | Falling-edge trigger input | Initiates output pulse on signal transition from high to low; hysteresis rejects noise below ~150mV swing. |
| GND (Pin 2) | Analog/digital ground reference | Must connect to low-inductance ground plane; bypass V+ to GND with 0.1µF ceramic capacitor placed adjacent to pins 1/2/5. |
| SET (Pin 3) | Pulse width programming node | Sinks ISET = 1.25µA–20µA; connects to GND via precision resistor (50kΩ–800kΩ) to set tMASTER; <10pF capacitance required for jitter control. |
| DIV (Pin 4) | Divider ratio & output polarity control | Voltage divider input (VDIV/V+ = (DIVCODE + 0.5)/16 ±1.5%) selects NDIV (1–2,097,152) and POL bit (0 = positive pulse, 1 = negative pulse). |
| V+ (Pin 5) | Power supply input | 2.25V–5.5V single supply; internal POR activates above 1.95V; supplies all analog and digital blocks including A/D converter and CMOS driver. |
| OUT (Pin 6) | CMOS output driver | Swings rail-to-rail (GND to V+); 30Ω typical output impedance; sources/sinks 20mA; requires series resistor when driving LEDs or low-Z loads. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable NDIV selection | Eight discrete division ratios (1, 8, 64, 512, 4096, 32768, 262144, 2097152) enable precise scaling of base 1µs period across 7 decades of pulse width. |
| Output polarity control | DIVCODE MSB (POL bit) configures active-high or active-low output without external inverters - simplifies interface with microcontroller GPIO or latch inputs. |
| Low-power idle operation | 60–100µA supply current at 2.25V/800kΩ - extends battery life in portable equipment and remote sensors between trigger events. |
| Fast start-up time | 500µs - allows rapid response after power-on or wake-from-sleep, essential for real-time fault monitoring. |
| Automotive qualification | AEC-Q100 Grade H (–40°C to 125°C) - validated for vibration, thermal cycling, and ESD robustness in automotive ECUs and ADAS subsystems. |
Applications
| Missing Pulse Detection | Watchdog Timer |
|---|---|
Use Scenario: Monitoring periodic signals (e.g., crankshaft position sensor pulses) where absence of expected edge indicates mechanical failure or sensor disconnect. IC Role / Device Role / Timing Role: Falling-edge–triggered one-shot that resets on each valid pulse; output stays high only if pulse is missed beyond programmed timeout window. Use Value: Detects pulse loss within 1µs–33.6s window with ±2.3% accuracy, enabling fail-safe shutdown before thermal runaway or uncontrolled motion occurs. | Use Scenario: Supervising microcontroller firmware execution in engine control units, ensuring software remains responsive and hasn't locked up. IC Role / Device Role / Timing Role: Non-retriggerable monostable triggered by MCU's periodic "alive" signal; generates reset pulse if signal stops. Use Value: Guarantees deterministic reset within 33.6s max timeout, meeting ISO 26262 ASIL-B timing requirements for functional safety. |
| Envelope Detection | High-Vibration Environments |
Use Scenario: Extracting amplitude envelope from modulated carrier signals (e.g., ultrasonic distance sensors or RF telemetry) in industrial IoT nodes. IC Role / Device Role / Timing Role: One-shot triggered by carrier zero-crossings; output pulse width tracks modulation depth via RSET/DIVCODE tuning. Use Value: Replaces op-amp-based envelope detectors with single-chip solution offering 70dB dynamic range and immunity to supply ripple. | Use Scenario: Timing-critical functions in aerospace actuators or heavy machinery controllers exposed to shock (>50g) and wide thermal swings. IC Role / Device Role / Timing Role: Provides stable pulse generation independent of board flex or solder joint stress due to monolithic silicon timing architecture. Use Value: Maintains ±0.006%/°C pulse drift and survives 150°C junction temperature - eliminates recalibration needs in harsh-mount applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar monostable timing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC6993HS6-4#WTRPBF | Falling-edge trigger with retrigger capability; identical package, temp grade, and electrical specs except TRIG behavior. | Required where consecutive pulses must extend output duration (e.g., PWM duty cycle monitoring), unlike fixed-duration timeout of LTC6993HS6-3#WTRPBF. | Select LTC6993HS6-4#WTRPBF only when system logic demands pulse extension on repeated triggers - otherwise LTC6993HS6-3#WTRPBF offers simpler, deterministic timing. |
| LTC6993IS6-3#TRPBF | Same functionality and pinout but rated for –40°C to 85°C industrial temp range; no AEC-Q100 qualification; lower cost. | Suitable for commercial/industrial equipment (e.g., PLC I/O modules) not subject to automotive thermal or reliability requirements. | Choose LTC6993IS6-3#TRPBF for cost-sensitive non-automotive designs; LTC6993HS6-3#WTRPBF is mandatory for automotive Grade H compliance and extended high-temp stability. |
Compared with LTC6993HS6-4#WTRPBF and LTC6993IS6-3#TRPBF, the LTC6993HS6-3#WTRPBF uniquely combines falling-edge triggering, non-retriggerable behavior, and AEC-Q100 Grade H qualification - making it the only choice for automotive missing-pulse detection where deterministic timeout and high-temp reliability are non-negotiable.
Availability
LTC6993HS6-3#WTRPBF is available at Aetrix Electronics and suitable for automotive engine control, industrial safety interlocks, and battery-powered sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC6993HS6-3#WTRPBF 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The TimerBlox® family - including LTC6993HS6-3#WTRPBF - was designed to replace discrete 555-based timing circuits with pin-configurable, temperature-stable, low-power silicon solutions for precision one-shot, oscillator, and pulse-width modulation functions.
FAQ
What is the trigger behavior of the LTC6993HS6-3#WTRPBF?
The LTC6993HS6-3#WTRPBF is a falling-edge–triggered, non-retriggerable monostable. A falling transition on the TRIG pin initiates a single output pulse of programmable width; subsequent falling edges during the active pulse are ignored until the output returns low and completes its rearm time (tARM = –4ns, meaning immediate readiness). This ensures strict one-pulse-per-trigger operation.
How do I set a 10ms output pulse width on the LTC6993HS6-3#WTRPBF?
To achieve 10ms output pulse width on the LTC6993HS6-3#WTRPBF, select NDIV = 512 (DIVCODE = 3, VDIV/V+ = 0.21875 ±1.5%) and RSET = 100kΩ. This satisfies tOUT = NDIV × RSET / 50kΩ × 1µs = 512 × 100k / 50k × 1µs = 10.24ms. Use 1% metal-film resistors for RSET and the DIV voltage divider to maintain ±2.3% accuracy.
Does the LTC6993HS6-3#WTRPBF require external components for basic operation?
Yes - the LTC6993HS6-3#WTRPBF requires three external components for full functionality: (1) a 0.1µF ceramic capacitor from V+ to GND for supply decoupling, (2) an RSET resistor from SET to GND to program tMASTER, and (3) a resistor divider (R1/R2) on the DIV pin to set NDIV and output polarity. No crystal, inductor, or trimmer is needed.
What is the minimum supply voltage for reliable operation of the LTC6993HS6-3#WTRPBF?
The LTC6993HS6-3#WTRPBF operates reliably down to 2.25V, with power-on reset asserting above 1.95V. At 2.25V and RSET = 800kΩ, supply current is 55–90µA depending on NDIV setting. Output high-level voltage is guaranteed ≥1.58V at 8mA sink, supporting interfacing with 1.8V logic families when used with appropriate level-shifting design.
Is the LTC6993HS6-3#WTRPBF pin-compatible with other TimerBlox one-shots?
Yes - the LTC6993HS6-3#WTRPBF shares identical 6-lead TSOT-23 pinout (TRIG/GND/SET/DIV/V+/OUT) with all S6-package TimerBlox one-shots (LTC6993-1/2/3/4 variants). This allows drop-in replacement across rising/falling-edge and retrigger/non-retrigger versions, provided PCB layout accommodates the same footprint and thermal constraints.
LTC6993HS6-3#WTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LTC®6993
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Monostable
- Independent Circuits:
- 1
- Schmitt Trigger Input:
- No
- Propagation Delay:
- 11 ns
- Current - Output High, Low:
- 16mA, 16mA
- Voltage - Supply:
- 2.25 V ~ 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LTC6993HS6-3#WTRPBF FAQ
1.How can I place an order for LTC6993HS6-3#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6993HS6-3#WTRPBF 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 LTC6993HS6-3#WTRPBF reliable?
The price and inventory of LTC6993HS6-3#WTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6993HS6-3#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC6993HS6-3#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6993HS6-3#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6993HS6-3#WTRPBF?
LTC6993HS6-3#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6993HS6-3#WTRPBF 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 LTC6993HS6-3#WTRPBF?
For technical support, including LTC6993HS6-3#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6993HS6-3#WTRPBF requirements.
6.How does Aetrix verify that LTC6993HS6-3#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6993HS6-3#WTRPBF 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 LTC6993HS6-3#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC6993HS6-3#WTRPBF?
All LTC6993HS6-3#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6993HS6-3#WTRPBF, 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 LTC6993HS6-3#WTRPBF part is unused and in its original packaging.
Return procedure for LTC6993HS6-3#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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