Analog Devices Inc. LTC6994CDCB-2#TRPBF

Overview

LTC6994CDCB-2#TRPBF from Analog Devices is a TimerBlox® programmable delay block IC that delays both rising and falling edges of digital input signals with precision timing from 1µs to 33.6 seconds. It uses a single RSET resistor and DIV pin voltage to configure NDIV (1–2²¹) and polarity inversion, operates from 2.25V to 5.5V, draws as low as 55µA at 2.25V/800kΩ, and is housed in a 6-lead 2mm × 3mm DFN package rated for 0°C to 70°C.

For engineers reviewing the LTC6994CDCB-2#TRPBF datasheet, LTC6994CDCB-2#TRPBF pinout, LTC6994CDCB-2#TRPBF application, or LTC6994CDCB-2#TRPBF equivalent, this page delivers verified timing accuracy specs, confirmed dual-edge delay behavior, real-world start-up and jitter performance, and validated automotive-grade alternatives for noise-sensitive debouncing and pulse qualification designs.

Technical Context

The LTC6994CDCB-2#TRPBF implements a master oscillator with tMASTER = 1µs × RSET/50kΩ, followed by an 8-step programmable divider (NDIV = 1, 8, 64, 512, 4096, 2¹⁵, 2¹⁸, 2²¹) to achieve its full delay range. Its internal 4-bit A/D converter on the DIV pin sets both NDIV and the POL bit, where POL = 1 enables output inversion - a defining feature of the -2 variant.

Unlike the LTC6994-1, the LTC6994CDCB-2#TRPBF delays both input transitions and guarantees minimum output pulse width ≥ tDELAY. Its SET pin regulates VSET to 1.00V ±30mV, making delay accuracy dependent solely on RSET tolerance and inherent device error (±2.3% typical for tDELAY > 512µs), not supply or temperature drift of VSET.

Key Specifications

Pinout & Package

Package: 6-lead (2mm × 3mm) plastic DFN with exposed pad connected to GND. Low-profile 1mm height suits space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC6994IDCB-2#TRPBF and LTC6994HDCB-2#TRPBF, the LTC6994CDCB-2#TRPBF offers identical delay architecture and dual-edge functionality at lower cost and shorter lead time for commercial-temperature applications, trading off extended thermal range for price and availability advantage.

Availability

LTC6994CDCB-2#TRPBF is available at Aetrix Electronics and suitable for switch debouncing, noise discrimination, delay matching, portable equipment timing, and high-vibration environment applications requiring stable component supply and consistent parametric performance across production lots.

Supply support for LTC6994CDCB-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 LTC6994CDCB-2#TRPBF belongs to the TimerBlox® family - silicon timing devices designed to replace discrete RC networks and microcontroller-based delays with deterministic, low-power, pin-configurable timing blocks for embedded signal conditioning.

FAQ

What is the maximum delay achievable with the LTC6994CDCB-2#TRPBF?

The LTC6994CDCB-2#TRPBF achieves a maximum delay of 33.6 seconds using NDIV = 2²¹ and RSET = 800kΩ. This is calculated as tDELAY = NDIV × RSET/50kΩ × 1µs. At these extremes, delay accuracy degrades to ±5.1% for tDELAY < 8µs but remains ±2.3% for delays over 512µs, making it suitable for long-interval timing where moderate precision suffices.

Does the LTC6994CDCB-2#TRPBF support inverting delay functionality?

Yes, the LTC6994CDCB-2#TRPBF supports output inversion via the POL bit (MSB of DIVCODE). When DIVCODE ≥ 8, POL = 1 activates inverting mode: rising input edges produce delayed falling outputs and vice versa. This is a core differentiator from the LTC6994-1 variant and enables direct interface with active-low control signals without external inverters.

How does supply voltage affect delay accuracy in the LTC6994CDCB-2#TRPBF?

Delay accuracy in the LTC6994CDCB-2#TRPBF varies with supply voltage: for NDIV ≥ 512, delay change is –0.2% to –0.6% across V+ = 2.25V to 5.5V; for 8 ≤ NDIV ≤ 64, it ranges from –0.1% to –0.9%. These shifts are fully characterized and included in the ±2.3% total error budget for tDELAY > 512µs, requiring no additional compensation in stable supply designs.

Can the LTC6994CDCB-2#TRPBF be used for both rising and falling edge delays simultaneously?

Yes, the LTC6994CDCB-2#TRPBF is specifically designed to delay both rising and falling edges of the IN signal - a defining feature of the "-2" variant. Unlike the LTC6994-1, which delays only one edge type per configuration, the LTC6994CDCB-2#TRPBF ensures symmetrical delay for bidirectional signal conditioning, making it ideal for PWM edge alignment and differential signal cleanup.

What is the recommended bypass capacitor for the V+ pin of the LTC6994CDCB-2#TRPBF?

A 0.1µF ceramic capacitor placed directly between the V+ pin (Pin 1) and GND pin (Pin 2) is required for stable operation of the LTC6994CDCB-2#TRPBF. This minimizes supply noise coupling into the master oscillator and SET pin regulation loop. The capacitor must be X7R or better dielectric, mounted with shortest possible traces to maintain low ESL and ensure effective high-frequency decoupling.