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Analog Devices Inc. LTC6994HS6-1#WTRPBF
- Part No.:
- LTC6994HS6-1#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Delay Lines
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC6994HS6-1#WTRPBF.pdf
- Description:
- TIMERBLOX: DELAY BLOCK/ DEBOUNCE
- Quantity:
- Payment:
- Shipping:
Inventory:1,878
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Product details
Overview
LTC6994HS6-1#WTRPBF from Analog Devices is a TimerBlox programmable delay block configured for rising- or falling-edge delay only (LTC6994-1 variant), housed in a 6-lead TSOT-23 package, operating from –40°C to 125°C, with 1µs–33.6s delay range, ±2.3% max delay error (>512µs), and 70µA supply current at 10µs delay. It serves as a precision edge-controlled pulse qualifier in high-vibration automotive sensor interfaces.
For engineers reviewing the LTC6994HS6-1#WTRPBF datasheet, LTC6994HS6-1#WTRPBF pinout, LTC6994HS6-1#WTRPBF application, or LTC6994HS6-1#WTRPBF equivalent, key selection criteria include automotive-grade temperature range (–40°C to 125°C), single-resistor delay programming via RSET, DIV pin voltage-based NDIV selection, CMOS output drive (±20mA), and AEC-Q100 qualification for safety-critical timing functions.
Technical Context
The LTC6994HS6-1#WTRPBF implements a master oscillator with tMASTER = 1µs × RSET/50kΩ, followed by an 8-step programmable divider (NDIV = 1, 8, 64, ..., 2²¹) to set total delay tDELAY = NDIV × RSET/50kΩ × 1µs. Its internal 4-bit A/D converter on the DIV pin interprets VDIV/V+ to determine both NDIV and POL bit state.
As an LTC6994-1 variant, it delays only one edge type per configuration: rising edge when POL = 0, falling edge when POL = 1. It does not support dual-edge delay or output inversion-functions exclusive to LTC6994-2. The SET pin regulates VSET to 1.00V ±30mV, making delay accuracy dependent solely on RSET tolerance and inherent device error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Delay Range | 1µs to 33.6 seconds - supports wide timing needs from digital debouncing to slow industrial control loops |
| Delay Accuracy | ±2.3% max for delays >512µs - enables reliable timing without calibration in automotive ECU signal conditioning |
| Supply Voltage | 2.25V to 5.5V - compatible with 3.3V and 5V logic domains and battery-backed systems |
| Operating Temp | –40°C to 125°C - meets under-hood automotive requirements per AEC-Q100 Grade H |
| Supply Current | 70µA at 10µs delay - ultra-low power suitable for always-on vehicle subsystems |
| Output Drive | ±20mA CMOS - directly drives LEDs, logic inputs, or small MOSFET gates without external buffers |
| Start-Up Time | 500 × tMASTER (typical) - settles within 500µs for RSET = 50kΩ, enabling fast system wake-up |
Pinout & Package
The LTC6994HS6-1#WTRPBF uses a 6-lead Plastic TSOT-23 package (1.0mm height), with exposed pad connected to GND for thermal and noise performance. Pin numbering follows standard S6 top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Logic input | Accepts 0.3×V+/0.7×V+ hysteresis thresholds; triggers delay on rising or falling edge per POL setting |
| GND (Pin 2) | Ground reference | Low-inductance return path for SET, DIV, and output; exposed pad must be tied to GND plane |
| SET (Pin 3) | Delay programming node | Sinks ISET = VSET/RSET (VSET ≈ 1.00V); sets master oscillator period; <10pF capacitance required for stability |
| OUT (Pin 6) | CMOS output | Swings rail-to-rail (GND to V+); sources/sinks 20mA; requires series resistor when driving LEDs or low-Z loads |
| V+ (Pin 5) | Power supply | 2.25V–5.5V input; bypassed with 0.1µF ceramic capacitor directly to GND pin |
| DIV (Pin 4) | Divider/polarity control | Voltage-programmed 4-bit A/D input; selects NDIV (1–2²¹) and POL bit; ≤100pF capacitance required for fast settling |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor delay tuning | RSET (50kΩ–800kΩ) sets tMASTER with no external clock or crystal - reduces BOM count and layout complexity |
| Automotive qualification | AEC-Q100 Grade H certified - validated for reliability in engine control, ADAS sensors, and body electronics |
| Edge-selective delay | POL bit configures rising-only or falling-only delay - eliminates false triggering in noisy switch or encoder signals |
| Noise-immune input | Hysteresis on IN pin (≈0.55×V+ rising / 0.48×V+ falling) rejects sub-µs glitches - ideal for mechanical switch debouncing |
| Dynamic delay adjustment | DIV pin accepts analog voltage (0–V+) to reprogram NDIV in real time - enables adaptive timing in closed-loop systems |
Applications
| Engine Control Unit Signal Conditioning | Industrial Pushbutton Debouncing |
|---|---|
Use Scenario: Filtering noisy crankshaft position sensor pulses before feeding to microcontroller timer capture input. IC Role / Device Role / Timing Role: Rising-edge delay block qualifying valid pulses while rejecting EMI-induced spikes. Use Value: Ensures accurate RPM calculation by eliminating false edges; operates reliably at 125°C near exhaust manifolds. | Use Scenario: Eliminating mechanical bounce in emergency stop buttons used in factory automation panels. IC Role / Device Role / Timing Role: Falling-edge delay circuit that asserts clean, glitch-free shutdown signal after button release. Use Value: Guarantees ≥10ms minimum pulse width to prevent spurious machine restart; consumes <100µA in standby. |
| Automotive Door Latch Monitoring | Portable Medical Device Power Sequencing |
Use Scenario: Validating door ajar switch transitions in high-vibration environments (e.g., off-road vehicles). IC Role / Device Role / Timing Role: Pulse qualifier rejecting vibration-induced chatter on normally-open microswitch contacts. Use Value: Maintains correct door status reporting across –40°C to 125°C; immune to 50g shock events per AEC-Q100. | Use Scenario: Controlling power-up sequence of analog front-end and MCU in battery-powered glucose meters. IC Role / Device Role / Timing Role: Precision 100ms delay block ensuring ADC reference stabilizes before sampling begins. Use Value: Achieves <±0.5% timing accuracy over battery voltage drop (3.6V → 2.8V); draws only 75µA during sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable delay applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC6994HS6-2#WTRPBF | LTC6994-2 variant; delays both rising and falling edges; supports output inversion via POL bit | Required where dual-edge timing or inverted output is needed (e.g., PWM dead-time insertion) | Select only if dual-edge delay or polarity control is essential; not drop-in compatible due to functional divergence |
| MAX6816EUT+T | Dedicated 3-channel debouncer IC; fixed 25ms delay; no resistor programming; 2.7V–5.5V supply | Targeted specifically at mechanical switch inputs; lacks programmability and wide delay range | Choose for cost-sensitive, single-purpose switch filtering where 25ms fixed delay suffices |
Compared with LTC6994HS6-2#WTRPBF and MAX6816EUT+T, the LTC6994HS6-1#WTRPBF offers uniquely flexible single-edge delay tuning across six decades of time with automotive-grade reliability-making it optimal for adaptive signal qualification where edge selectivity and wide-range programmability are critical.
Availability
LTC6994HS6-1#WTRPBF is available at Aetrix Electronics and suitable for automotive ECU design, industrial pushbutton interface, and portable medical device power sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC6994HS6-1#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 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 LTC6994HS6-1#WTRPBF-is designed for precision silicon timing applications where programmability, low power, and robustness replace quartz-based solutions in harsh environments.
FAQ
What is the maximum delay achievable with the LTC6994HS6-1#WTRPBF?
The LTC6994HS6-1#WTRPBF achieves a maximum delay of 33.6 seconds when configured with NDIV = 2²¹ and RSET = 800kΩ. This value is confirmed in the Electrical Characteristics table (tDELAY MAX = 33.55 sec) and supported by Figure 2's delay vs. DIVCODE plot. The actual delay is calculated as tDELAY = NDIV × RSET/50kΩ × 1µs, with NDIV selected via the DIV pin voltage.
Does the LTC6994HS6-1#WTRPBF support both rising and falling edge delay?
No, the LTC6994HS6-1#WTRPBF is the LTC6994-1 variant and delays only one edge type per configuration: rising edge when POL = 0, falling edge when POL = 1. Dual-edge delay is exclusive to the LTC6994-2 family (e.g., LTC6994HS6-2#WTRPBF). This distinction is explicitly stated in the "DEVICE DELAY FUNCTION" diagram and "LTC6994-1 Functionality" section.
What is the purpose of the SET pin on the LTC6994HS6-1#WTRPBF?
The SET pin on the LTC6994HS6-1#WTRPBF regulates VSET to 1.00V ±30mV and sinks ISET current, which programs the master oscillator frequency. Connecting RSET between SET and GND sets ISET = VSET/RSET, determining tMASTER = 1µs × RSET/50kΩ. This makes delay accuracy independent of VSET drift and dependent only on RSET tolerance and device error.
Is the LTC6994HS6-1#WTRPBF qualified for automotive use?
Yes, the LTC6994HS6-1#WTRPBF is AEC-Q100 qualified for automotive applications (Grade H, –40°C to 125°C), as confirmed in the "ORDER INFORMATION" table and "FEATURES" list. The "#W" suffix denotes controlled manufacturing for automotive reliability, and its datasheet specifies junction temperature limits (TJMAX = 150°C) and thermal metrics (θJA = 192°C/W) aligned with automotive standards.
How does the DIV pin configure delay on the LTC6994HS6-1#WTRPBF?
The DIV pin on the LTC6994HS6-1#WTRPBF connects to an internal 4-bit A/D converter referenced to V+. Its voltage (VDIV) determines both the 8-step divider ratio (NDIV = 1, 8, 64, ..., 2²¹) and the POL bit (rising/falling edge select). Table 1 provides recommended resistor pairs (e.g., R1 = 1000kΩ, R2 = 887kΩ for DIVCODE = 7) to achieve precise VDIV/V+ ratios within ±1.5%.
LTC6994HS6-1#WTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- TimerBlox®
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Taps/Steps:
- 8
- Function:
- Programmable
- Delay to 1st Tap:
- -
- Tap Increment:
- -
- Available Total Delays:
- 1µs ~ 33.6s
- Number of Independent Delays:
- 1
- Voltage - Supply:
- 2.25V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LTC6994HS6-1#WTRPBF FAQ
1.How can I place an order for LTC6994HS6-1#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6994HS6-1#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 LTC6994HS6-1#WTRPBF reliable?
The price and inventory of LTC6994HS6-1#WTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6994HS6-1#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC6994HS6-1#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6994HS6-1#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6994HS6-1#WTRPBF?
LTC6994HS6-1#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6994HS6-1#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 LTC6994HS6-1#WTRPBF?
For technical support, including LTC6994HS6-1#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6994HS6-1#WTRPBF requirements.
6.How does Aetrix verify that LTC6994HS6-1#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6994HS6-1#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 LTC6994HS6-1#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC6994HS6-1#WTRPBF?
All LTC6994HS6-1#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6994HS6-1#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 LTC6994HS6-1#WTRPBF part is unused and in its original packaging.
Return procedure for LTC6994HS6-1#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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