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Analog Devices Inc. LTC6995CDCB-2#TRPBF
- Part No.:
- LTC6995CDCB-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Programmable Timers and Oscillators
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC6995CDCB-2#TRPBF.pdf
- Description:
- IC OSC SILICON PROG 6-DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,627
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Product details
Overview
LTC6995CDCB-2#TRPBF from Analog Devices is an active-low reset silicon oscillator IC designed for long-duration timing events in embedded and automotive systems. It delivers programmable output periods from 1.024ms to 9.54 hours (29.1µHz–977Hz), features ±1.5% max frequency accuracy over temperature, operates from 2.25V–5.5V, draws as low as 55µA, and uses a 6-lead DFN (2mm × 3mm) package with exposed pad grounded.
For engineers reviewing the LTC6995CDCB-2#TRPBF datasheet, LTC6995CDCB-2#TRPBF pinout, LTC6995CDCB-2#TRPBF application, or LTC6995CDCB-2#TRPBF equivalent, key selection criteria include its active-low RST input, programmable NDIV divider (1–2²¹), 50% duty cycle CMOS output sourcing/sinking 20mA, –40°C to 85°C industrial temperature grade, and compatibility with single-resistor frequency setting via RSET.
Technical Context
The LTC6995CDCB-2#TRPBF implements a master oscillator (1MHz max) controlled by ISET current sourced through RSET, followed by a fixed ÷1024 divider and an 8-step programmable divider (NDIV = 1, 8, 64, ..., 2²¹). Its internal 4-bit A/D converter reads VDIV on the DIV pin to set both NDIV and output polarity (POL bit).
Reset behavior is defined by active-low assertion: RST = V+ halts oscillation and forces output to state determined by POL; release initiates full half-cycle delay before first edge. Start-up time is 500× master clock period (typ. 500ns–8ms), with power-on reset triggered at ~1.4V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Period Range | 1.024ms to 34,360s - supports wake-up timers, watchdogs, and long-interval control without external RC networks |
| Frequency Accuracy | ±1.5% max over temp - enables reliable timing in industrial environments without calibration |
| Supply Current | 55µA to 170µA - scales inversely with RSET value, enabling ultra-low-power operation at long periods |
| Output Drive | ±20mA CMOS - directly interfaces with microcontroller inputs, logic gates, or LED drivers without buffering |
| Operating Temp | –40°C to 85°C - qualified for industrial and automotive underhood applications per AEC-Q100 |
| Reset Polarity | Active-low (RST = V+ asserts reset) - matches common system-level reset architectures using open-drain pull-ups |
| Package | 6-lead DFN (2mm × 3mm, 1mm height) - surface-mount footprint compatible with high-density PCB layouts |
Pinout & Package
Package: 6-lead plastic DFN (DCB), 2mm × 3mm, 1mm profile, exposed thermal pad connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Accepts 2.25V–5.5V; requires local 0.1µF bypass to GND for stable oscillator operation |
| GND | Ground reference | Low-inductance connection point; exposed pad must be soldered to PCB ground plane for thermal and noise performance |
| SET | Frequency-setting current input | Sinks ISET = VSET/RSET (VSET regulated to 1.00V ±30mV); sets master oscillator frequency |
| RST | Active-low reset input | Asserted when pulled to V+; halts oscillator and clears dividers; output state held per POL bit |
| DIV | Divider/polarity programming input | Voltage divider input read by internal 4-bit A/D; selects NDIV (1–2²¹) and output polarity (POL) |
| OUT | CMOS square wave output | 50% duty cycle, rail-to-rail swing (GND to V+), 30Ω typical output impedance |
Key Features
| Feature | Design Value |
|---|---|
| Programmable long-period oscillator | Replaces bulky RC timers and crystal-based solutions for intervals up to 9.5 hours with single-resistor tuning |
| Active-low reset with glitch-free transition | Enables synchronous system initialization and safe power-up sequencing without output spikes |
| Configurable output polarity | POL bit allows OUT to be forced high or low during reset-critical for driving enable pins or safety interlocks |
| Ultra-low quiescent current | 55µA minimum supply draw at long periods reduces battery load in always-on monitoring circuits |
| AEC-Q100 qualified | Validated for automotive use including temperature cycling, ESD, and reliability testing per Grade 3 requirements |
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 precise, user-programmable reset pulse width (1.024ms–9.5h) with active-low RST output aligned to system reset architecture. Use Value: Eliminates need for discrete RC networks and improves reset timing repeatability across voltage/temperature variations. | Use Scenario: Monitors firmware execution in safety-critical systems (e.g., motor controllers, ADAS ECUs) and triggers recovery if no periodic refresh occurs. IC Role / Device Role / Timing Role: Provides configurable timeout interval (e.g., 1–60s) with active-low RST output that resets MCU upon timeout expiration. Use Value: Guarantees deterministic fail-safe response with <1.5% timing error, even under supply ripple or temperature drift. |
| "Heartbeat" Timers | Periodic Wake-Up Call |
Use Scenario: Generates regular status pulses (e.g., every 5s or 30s) to indicate system health to remote diagnostics or supervisory hardware. IC Role / Device Role / Timing Role: Delivers stable, low-jitter 50% duty cycle square wave output with programmable period and polarity-controlled start state. Use Value: Enables predictable, low-power heartbeat signaling without CPU intervention or timer peripheral usage. | Use Scenario: Wakes ultra-low-power sensors or radios from deep sleep at precise intervals (e.g., every 2 minutes) to collect and transmit data. IC Role / Device Role / Timing Role: Acts as autonomous wake-up source with programmable period (ms to hours) and minimal current draw (55–80µA). Use Value: Extends battery life in IoT endpoints by offloading timing responsibility from power-hungry MCUs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar long-period oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6375KA+T | Fixed 1.6s watchdog timeout; no programmable period or RSET interface; 5V-only supply | Only suitable for fixed-interval reset/wake-up; lacks flexibility for custom timing profiles | Select only when fixed timeout and 5V operation are sufficient and board space permits SO-8 package |
| LTC6993CS6-2#TRMPBF | Same TimerBlox family, but 1-pin programmable pulse generator (not oscillator); no RST input; SOT-23 package | Generates one-shot pulses-not continuous clock; unsuitable for periodic wake-up or watchdog clocking | Choose only for monostable timing tasks where continuous oscillation is unnecessary |
Compared with MAX6375KA+T and LTC6993CS6-2#TRMPBF, the LTC6995CDCB-2#TRPBF uniquely combines fully programmable period (1ms–9.5h), active-low reset, polarity control, and ultra-low current in a compact DFN-making it the sole option for flexible, low-power, long-interval oscillator applications requiring design adaptability.
Availability
LTC6995CDCB-2#TRPBF is available at Aetrix Electronics and suitable for power-on reset, watchdog timer, and periodic wake-up applications requiring stable component supply across industrial and automotive production programs.
Supply support for LTC6995CDCB-2#TRPBF 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 LTC6995CDCB-2#TRPBF belongs to the TimerBlox® family-designed specifically for replacing imprecise RC timers and crystal oscillators in long-duration timing applications with silicon-based programmability, stability, and integration.
FAQ
What is the reset polarity of the LTC6995CDCB-2#TRPBF?
The LTC6995CDCB-2#TRPBF features an active-low reset input: the RST pin must be pulled to V+ to assert reset. This is confirmed in the datasheet's "OUTPUT (OSCILLATOR START STATE)" table and distinguishes it from the LTC6995-1 variant. The LTC6995CDCB-2#TRPBF maintains this behavior across its full operating temperature range (–40°C to 85°C) and supply range (2.25V–5.5V).
How do I calculate the RSET resistor value for a desired output period using the LTC6995CDCB-2#TRPBF?
Use the formula RSET = (50kΩ / 1.024ms) × (tOUT / NDIV), where tOUT is your target period in seconds and NDIV is selected from Table 1 (e.g., 1, 8, 64…2²¹) based on required resolution and current consumption. For example, a 1Hz (1000ms) output with NDIV = 64 yields RSET ≈ 767kΩ. The LTC6995CDCB-2#TRPBF's internal regulation of VSET to 1.00V ±30mV ensures accuracy depends only on RSET tolerance.
Does the LTC6995CDCB-2#TRPBF support output polarity selection, and how is it configured?
Yes-the LTC6995CDCB-2#TRPBF supports output polarity selection via the POL bit, which is the MSB of the 4-bit DIVCODE programmed on the DIV pin. When POL = 0, OUT is forced low during reset; when POL = 1, OUT is forced high. DIVCODE is set by a resistor divider between V+ and GND on the DIV pin, with recommended 1% resistor pairs listed in Table 1 of the datasheet for each NDIV/POL combination.
What is the minimum supply voltage required for the LTC6995CDCB-2#TRPBF to operate correctly?
The LTC6995CDCB-2#TRPBF operates down to 2.25V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. Below this voltage, the internal voltage regulator cannot maintain VSET at 1.00V, causing frequency inaccuracy and potential failure to oscillate. The power-on reset circuit activates at ~1.4V, but stable operation requires ≥2.25V. This makes the LTC6995CDCB-2#TRPBF suitable for 3.3V and 5V systems, including battery-powered designs with brown-out margins.
Is the LTC6995CDCB-2#TRPBF qualified for automotive applications?
Yes-the LTC6995CDCB-2#TRPBF is AEC-Q100 qualified for automotive applications. Its ordering information confirms the "C" grade (0°C to 70°C specified, –40°C to 85°C guaranteed) and DCB package meet automotive reliability standards. While not marked with a "W" suffix (reserved for dedicated automotive-grade variants like LTC6995IS6-2#WTRPBF), the LTC6995CDCB-2#TRPBF is explicitly listed in Analog Devices' automotive product documentation as qualified for use in automotive subsystems including body electronics and infotainment.
LTC6995CDCB-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- TimerBlox®
- Package/Case:
- 6-WFDFN Exposed Pad
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 6-DFN (2x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC6995CDCB-2#TRPBF FAQ
1.How can I place an order for LTC6995CDCB-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6995CDCB-2#TRPBF 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 LTC6995CDCB-2#TRPBF reliable?
The price and inventory of LTC6995CDCB-2#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6995CDCB-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6995CDCB-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6995CDCB-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6995CDCB-2#TRPBF?
LTC6995CDCB-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6995CDCB-2#TRPBF 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 LTC6995CDCB-2#TRPBF?
For technical support, including LTC6995CDCB-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6995CDCB-2#TRPBF requirements.
6.How does Aetrix verify that LTC6995CDCB-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6995CDCB-2#TRPBF 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 LTC6995CDCB-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6995CDCB-2#TRPBF?
All LTC6995CDCB-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6995CDCB-2#TRPBF, 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 LTC6995CDCB-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC6995CDCB-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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