Analog Devices Inc. LTC6995IDCB-1

Overview

LTC6995IDCB-1 from Analog Devices is a silicon-based programmable low-frequency oscillator IC designed for long-duration timing events in embedded and industrial systems. It delivers output periods from 1.024ms to 9.54 hours (29.1µHz–977Hz), features active-high reset, operates from 2.25V–5.5V, draws as low as 55µA, and is housed in a 6-lead 2mm × 3mm DFN package rated for –40°C to 85°C.

For engineers reviewing the LTC6995IDCB-1 datasheet, LTC6995IDCB-1 pinout, LTC6995IDCB-1 application, or LTC6995IDCB-1 equivalent, this page provides verified timing parameters, confirmed DCB package mapping, validated RST/SET/DIV pin functions, real-world watchdog and power-on reset use cases, and two manufacturer-confirmed alternative options with documented functional differences.

Technical Context

The LTC6995IDCB-1 implements a master oscillator (1MHz max) controlled by SET pin current (I_SET = V_SET/R_SET, V_SET ≈ 1V), followed by a fixed ÷1024 divider and an 8-step programmable divider (NDIV = 1, 8, 64, 512, 4096, 2¹⁵, 2¹⁸, 2²¹). Its internal 4-bit A/D converter on the DIV pin sets both NDIV and output polarity (POL bit).

Reset behavior is version-specific: LTC6995IDCB-1 uses active-high RST, halting oscillation and clearing dividers; release initiates a full half-period delay before first edge. Output is CMOS, sourcing/sinking ±20mA, with 50% duty cycle and <1.5% frequency error over temperature and supply.

Key Specifications

Pinout & Package

Package: 6-lead (2mm × 3mm) plastic DFN (DCB), exposed pad connected to GND. Pin 1 = V+, Pin 2 = GND, Pin 3 = SET, Pin 4 = DIV, Pin 5 = RST, Pin 6 = OUT.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable oscillator applications.

Compared with LTC6995IDCB-2, the LTC6995IDCB-1 offers native active-high reset alignment with most microcontrollers, while DS1086L-010+ trades programmability and ultra-low power for guaranteed factory-trimmed stability-making LTC6995IDCB-1 optimal for new designs demanding configurable, battery-friendly timing.

Availability

LTC6995IDCB-1 is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics, medical diagnostic equipment, and IoT edge sensors requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for LTC6995IDCB-1 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 LTC6995IDCB-1 belongs to the TimerBlox® family of silicon timing devices, engineered specifically for replacing bulky, temperature-sensitive RC and crystal-based timers in long-duration, low-power applications such as watchdogs, wake-up clocks, and power-on reset circuits.

FAQ

What is the maximum output period achievable with the LTC6995IDCB-1?

The LTC6995IDCB-1 achieves a maximum output period of 34,360 seconds (9.54 hours), realized when R_SET = 800kΩ and NDIV = 2²¹. This value is explicitly specified in the Electrical Characteristics table under t_OUT MAX and confirmed in the Typical Performance Characteristics section. The LTC6995IDCB-1 maintains ±1.5% accuracy across this full range under –40°C to 85°C conditions.

Does the LTC6995IDCB-1 require external passive components for basic operation?

Yes-the LTC6995IDCB-1 requires only two external components for full functionality: a resistor (R_SET) from SET to GND to program frequency, and a 0.1µF ceramic capacitor from V+ to GND for supply decoupling. No timing capacitor or crystal is needed. Resistor tolerances of 0.5% or better are recommended for ±1.5% accuracy; 1% resistors suffice for less critical applications.

How does the reset function behave on power-up for the LTC6995IDCB-1?

At power-up, the LTC6995IDCB-1's internal POR circuit holds OUT low until V+ exceeds ~1.4V, then executes a start-up sequence lasting ≤8ms. If RST is low at end-of-startup, OUT remains low (due to POL=0 default). When RST transitions high, the oscillator begins with a precise half-period delay before the first rising edge-ensuring deterministic timing for power-on reset applications.

Can the LTC6995IDCB-1 generate non-50% duty cycle waveforms?

No-the LTC6995IDCB-1 outputs a fixed 50% duty cycle square wave under all operating conditions. Its architecture uses a master oscillator followed by integer dividers (÷1024 and NDIV), which inherently preserve symmetry. Duty cycle adjustment requires external logic or a different device family (e.g., LTC6992 series PWM generators).

Is the exposed pad on the LTC6995IDCB-1's DFN package electrically connected?

Yes-the exposed pad (Pin 7) on the LTC6995IDCB-1's DCB package is internally connected to GND and must be soldered to a PCB ground plane for thermal and electrical performance. The datasheet states "EXPOSED PAD (PIN 7) CONNECTED TO GND, PCB CONNECTION OPTIONAL" - though optional per mechanical assembly, it is strongly recommended for thermal dissipation and noise immunity, especially in high-vibration environments.