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Analog Devices Inc. LTC6995HS6-2#WTRPBF
- Part No.:
- LTC6995HS6-2#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Programmable Timers and Oscillators
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC6995HS6-2#WTRPBF.pdf
- Description:
- TIMERBLOX: LONG TIMER, L FREQ OS
- Quantity:
- Payment:
- Shipping:
Inventory:3,067
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Product details
Overview
LTC6995HS6-2#WTRPBF from Analog Devices is an automotive-grade silicon oscillator IC with active-low reset, programmable period (1.024ms–9.54h), 50% duty cycle CMOS output, and operation from –40°C to 125°C in a 6-lead TSOT-23 package. It serves as a long-duration timing engine in power-on reset, watchdog, and periodic wake-up circuits.
For engineers reviewing the LTC6995HS6-2#WTRPBF datasheet, LTC6995HS6-2#WTRPBF pinout, LTC6995HS6-2#WTRPBF application, or LTC6995HS6-2#WTRPBF equivalent, key selection factors include its ±1.5% frequency accuracy over temperature, 55–80µA supply current across period range, RSET-based frequency programming, automotive AEC-Q100 qualification, and polarity-selectable reset behavior.
Technical Context
The LTC6995HS6-2#WTRPBF implements a master oscillator (1MHz max) followed by a fixed ÷1024 divider and an 8-step programmable divider (NDIV = 1, 8, 64, 512, 4096, 2¹⁵, 2¹⁸, 2²¹), enabling precise low-frequency generation. Its SET pin regulates VSET to 1.00V ±30mV, making output period tOUT = NDIV × RSET / 50kΩ × 1.024ms independent of supply drift when using a single resistor.
Reset logic is active-low (RST pin pulled high to disable oscillation), and output polarity during reset is determined by the MSB of DIVCODE. The internal 4-bit A/D converter on the DIV pin reads VDIV/V+ to select both NDIV and POL bit, with ±1.5% voltage ratio tolerance required for correct code detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Period Range | 1.024ms to 34,360s (9.54h); enables ultra-long one-shots and wake-up intervals without external counters |
| Frequency Accuracy | ±1.5% over full temperature range; ensures reliable timing in automotive under-hood environments |
| Supply Current | 55µA to 80µA (2ms–9.5h period); supports battery-powered systems with multi-year standby |
| Operating Temp | –40°C to +125°C; qualified per AEC-Q100 Grade H for automotive powertrain and body control modules |
| Output Drive | CMOS, ±20mA sink/source; directly interfaces with microcontroller GPIO, logic gates, or small-signal loads |
| Start-Up Time | 500 × tMASTER (≤8ms typical); guarantees deterministic initialization after power rail stabilization |
| Reset Polarity | Active-low RST input; simplifies integration with open-drain reset supervisors or MCU reset inputs |
Pinout & Package
Package: 6-lead TSOT-23 (S6), 1mm profile, lead-free, RoHS-compliant, footprint compatible with standard SOT-23 pick-and-place equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-low reset input | Pulling high halts oscillator and clears dividers; release initiates full half-cycle delay before first edge |
| GND | Analog/digital ground reference | Must connect to low-inductance ground plane; bypass V+ to this pin with 0.1µF ceramic capacitor |
| SET | Frequency-setting current input | Sinks ISET = VSET/RSET; VSET regulated to 1.00V ±30mV; requires ≤10pF capacitance for stability |
| OUT | CMOS square wave output | 50% duty cycle, rail-to-rail swing (GND to V+), 30Ω output impedance, 20mA drive capability |
| V+ | Power supply input | 2.25V to 5.5V operation; noise-sensitive-requires local 0.1µF decoupling to GND |
| DIV | Divider/polarity programming input | 4-bit A/D reads VDIV/V+ to set NDIV and POL bit; ≤100pF capacitance required for fast settling |
Key Features
| Feature | Design Value |
|---|---|
| Programmable long-period timing | Single RSET resistor sets period from milliseconds to >9 hours-eliminates need for external RC networks or counter ICs |
| Automotive qualification | AEC-Q100 Grade H certified; validated for operation at –40°C to +125°C with full parametric guarantee |
| Reset-initiated deterministic start | Release of active-low RST triggers precise half-period delay before first output edge-ideal for synchronized power-on reset |
| Supply-insensitive frequency setting | VSET regulation to 1.00V ±30mV makes tOUT = NDIV × RSET / 50kΩ × 1.024ms independent of V+ variation |
| Glitch-free DIVCODE update | Digital filter ensures NDIV changes occur cleanly within one master clock cycle-no runt pulses or metastability |
Applications
| Power-On Reset Timer | Watchdog Timer |
|---|---|
Use Scenario: Ensures microcontroller remains held in reset until power rails stabilize and critical peripherals are ready. IC Role / Device Role / Timing Role: Generates a precise, factory-programmable reset pulse width (e.g., 100ms–2s) triggered by power ramp. Use Value: Replaces discrete RC + Schmitt trigger with ±1.5% accuracy and no component aging drift-critical for ASIL-B systems. | Use Scenario: Monitors firmware execution in engine control units (ECUs) and reboots on software hang. IC Role / Device Role / Timing Role: Provides configurable timeout interval (e.g., 1–60s) fed to MCU's WDI pin; reset released on valid heartbeat signal. Use Value: Enables long watchdog periods without external counters; AEC-Q100 qualification ensures reliability in harsh ECU environments. |
| Periodic Wake-Up Call | "Heartbeat" Signal Generator |
Use Scenario: Wakes ultra-low-power sensor nodes (e.g., tire pressure monitors) every 30 seconds to sample and transmit data. IC Role / Device Role / Timing Role: Drives MCU's interrupt pin with precise, low-duty-cycle periodic pulse-minimizing average current draw. Use Value: 55µA quiescent current at 30s period extends coin-cell battery life to >5 years; programmable via single resistor. | Use Scenario: Generates visible or audible status indication (e.g., LED blink, buzzer pulse) in automotive infotainment or ADAS displays. IC Role / Device Role / Timing Role: Produces stable 0.5Hz–2Hz square wave to drive indicator circuitry with exact 50% duty cycle. Use Value: Eliminates timing variance from crystal oscillators or RC timers-ensures consistent human-perceivable rhythm across temperature and voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC6995HS6-1#WTRPBF | Active-high reset input; identical period range, accuracy, and package | Requires high-asserted reset signal instead of low-asserted; same automotive temp grade | Select when system reset supervisor outputs active-high or MCU reset pin is active-high |
| SiT1533AI-H4-33E-32.768000 | Fixed 32.768kHz MEMS oscillator; no programmability; ±20ppm stability; 1.62–3.63V supply | Only suitable for fixed-frequency timing; lacks reset control, programmable period, or wide-range adjustment | Choose only for simple real-time clock backup where frequency is invariant and no reset coordination is needed |
Compared with LTC6995HS6-1#WTRPBF, the LTC6995HS6-2#WTRPBF offers identical timing performance but inverted reset polarity-critical for compatibility with existing active-low reset infrastructure. Versus SiT1533AI-H4-33E-32.768000, it provides 10⁷× wider period range and system-level reset coordination, at the cost of fixed-frequency simplicity.
Availability
LTC6995HS6-2#WTRPBF is available at Aetrix Electronics and suitable for automotive powertrain control, industrial safety PLCs, and battery-powered IoT sensors requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LTC6995HS6-2#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 precision instrumentation, industrial automation, and automotive markets.
The TimerBlox® family-including LTC6995HS6-2#WTRPBF-is designed specifically for robust, programmable silicon timing in space-constrained, high-reliability applications where crystal oscillators or RC networks fall short in accuracy, stability, or integration.
FAQ
What is the operating temperature range for the LTC6995HS6-2#WTRPBF?
The LTC6995HS6-2#WTRPBF is rated for –40°C to +125°C and is AEC-Q100 qualified for automotive Grade H applications. This specification is guaranteed across the full range-not just characterized-making it suitable for under-hood engine control units and transmission control modules where thermal stress is extreme.
How does the LTC6995HS6-2#WTRPBF achieve ±1.5% frequency accuracy over temperature?
The LTC6995HS6-2#WTRPBF achieves ±1.5% frequency accuracy by regulating the SET pin voltage to 1.00V ±30mV, decoupling output period tOUT = NDIV × RSET / 50kΩ × 1.024ms from supply and temperature variations. RSET resistor tolerance and inherent device error are the dominant contributors-no external calibration is required.
Can the LTC6995HS6-2#WTRPBF be used with a single resistor for frequency programming?
Yes-the LTC6995HS6-2#WTRPBF is optimized for single-resistor programming: connect RSET between SET and GND. With RSET = 50kΩ to 800kΩ, it delivers periods from 1.024ms to 9.54h. For best accuracy, use a 0.5% metal-film resistor with ≤50ppm/°C TCR; thick-film 1% resistors suffice for less demanding applications.
What is the function of the DIV pin on the LTC6995HS6-2#WTRPBF?
The DIV pin on the LTC6995HS6-2#WTRPBF connects to an internal 4-bit A/D converter referenced to V+. Its voltage (VDIV) determines both the programmable divider ratio (NDIV = 1, 8, 64, ..., 2²¹) and output polarity (POL bit). A resistor divider between V+ and GND sets VDIV/V+ to match one of 16 ideal ratios (e.g., 0.28125 for NDIV = 4096).
Is the LTC6995HS6-2#WTRPBF pin-compatible with other TimerBlox devices?
No-the LTC6995HS6-2#WTRPBF uses a dedicated 6-pin TSOT-23 pinout (RST, GND, SET, OUT, V+, DIV) not shared with other TimerBlox families like LTC6990 or LTC6993. While functional concepts overlap, pin assignments, internal architecture, and reset behavior differ; PCB layout must be specific to the LTC6995HS6-2#WTRPBF.
LTC6995HS6-2#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
- Type:
- Oscillator, Silicon
- Count:
- -
- Frequency:
- 29.1µHz ~ 977Hz
- Voltage - Supply:
- 2.25V ~ 5.5V
- Current - Supply:
- 135 µA
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- TSOT-23-6
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
LTC6995HS6-2#WTRPBF FAQ
1.How can I place an order for LTC6995HS6-2#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6995HS6-2#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 LTC6995HS6-2#WTRPBF reliable?
The price and inventory of LTC6995HS6-2#WTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6995HS6-2#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC6995HS6-2#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6995HS6-2#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6995HS6-2#WTRPBF?
LTC6995HS6-2#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6995HS6-2#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 LTC6995HS6-2#WTRPBF?
For technical support, including LTC6995HS6-2#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6995HS6-2#WTRPBF requirements.
6.How does Aetrix verify that LTC6995HS6-2#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6995HS6-2#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 LTC6995HS6-2#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC6995HS6-2#WTRPBF?
All LTC6995HS6-2#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6995HS6-2#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 LTC6995HS6-2#WTRPBF part is unused and in its original packaging.
Return procedure for LTC6995HS6-2#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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