Analog Devices Inc. LTC6994IDCB-2#TRPBF

Overview

LTC6994IDCB-2#TRPBF from Analog Devices is a programmable dual-edge delay block with 1µs–33.6s range, ±2.3% max delay error (for delays >512µs), CMOS output sourcing/sinking 20mA, and operates from 2.25V to 5.5V supply. It implements edge-controlled timing in noise-discriminator circuits for switch debouncing in high-vibration industrial controls.

For engineers reviewing the LTC6994IDCB-2#TRPBF datasheet, LTC6994IDCB-2#TRPBF pinout, LTC6994IDCB-2#TRPBF application, or LTC6994IDCB-2#TRPBF equivalent, key selection criteria include guaranteed –40°C to 85°C operation, DFN-6 (2mm × 3mm) package with exposed thermal pad, dynamic DIV pin voltage programming of NDIV (1–2,097,152), and POL-bit-enabled output inversion.

Technical Context

The LTC6994IDCB-2#TRPBF uses an internal master oscillator (t_MASTER = 1µs × R_SET/50kΩ) feeding an 8-step programmable divider (NDIV = 1, 8, 64, 512, 4096, 2¹⁵, 2¹⁸, 2²¹) to generate precise delays. Its digital filter ensures stable DIVCODE recognition even with slow V_DIV transitions.

Unlike the LTC6994-1, the LTC6994IDCB-2#TRPBF delays both rising and falling edges of the IN signal and supports output inversion via the MSB (POL bit) of the 4-bit DIVCODE. The SET pin regulates V_SET to 1.00V ±30mV, making delay accuracy dependent solely on R_SET tolerance and internal oscillator error.

Key Specifications

Pinout & Package

6-lead plastic DFN (DCB) package, 2mm × 3mm footprint, 1mm profile, exposed thermal pad connected to GND. Pin 7 (exposed pad) is electrically GND and may be soldered to PCB ground plane for improved thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6373KA+T and TPS3808G01DBVR, the LTC6994IDCB-2#TRPBF offers full programmability of delay range, dual-edge response, output inversion, and wide supply compatibility - making it uniquely suited for adaptive timing in embedded signal conditioning.

Availability

LTC6994IDCB-2#TRPBF is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC6994IDCB-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, Inc. 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 the LTC6994IDCB-2#TRPBF-is designed for precision silicon timing applications where programmability, low power, and robustness replace quartz-based solutions in space-constrained or high-reliability systems.

FAQ

What is the maximum delay achievable with the LTC6994IDCB-2#TRPBF?

The LTC6994IDCB-2#TRPBF achieves a maximum delay of 33.6 seconds using NDIV = 2,097,152 and R_SET = 800kΩ. This occurs when the DIV pin is configured for DIVCODE = 7 or 8 (per Table 1), and is validated across the full –40°C to +85°C operating range with ±5.1% accuracy for 1µs–8µs delays and ±2.3% for delays exceeding 512µs.

How does the LTC6994IDCB-2#TRPBF differ from the LTC6994-1 variant?

The LTC6994IDCB-2#TRPBF delays both rising and falling edges of the IN signal and supports output inversion via the POL bit, whereas the LTC6994-1 delays only one edge (rising or falling, selected by POL). This makes the LTC6994IDCB-2#TRPBF ideal for generating minimum-pulse-width outputs and symmetric timing control in bidirectional signal paths.

Can the LTC6994IDCB-2#TRPBF operate from a 2.5V supply?

Yes, the LTC6994IDCB-2#TRPBF operates over 2.25V to 5.5V, including 2.5V. At 2.5V, it delivers ±8mA output drive (V_OL ≤ 0.26V, V_OH ≥ 1.58V @ 8mA), maintains 5ns minimum input pulse width, and exhibits typical 70µA supply current with R_SET = 800kΩ - enabling direct interface with low-voltage microcontrollers and sensors.

What is the role of the exposed pad on the LTC6994IDCB-2#TRPBF DFN package?

The exposed pad (Pin 7) on the LTC6994IDCB-2#TRPBF is internally connected to GND and serves as the primary thermal conduction path. Soldering it to a PCB ground plane reduces θ_JA from 64°C/W to ~45°C/W, allowing safe operation at full 20mA output drive up to +85°C ambient without derating. It must be electrically tied to GND but does not require additional signal routing.

Is the LTC6994IDCB-2#TRPBF suitable for automotive applications?

Yes - the LTC6994IDCB-2#TRPBF is specified for –40°C to +85°C operation and is AEC-Q100 qualified (Grade I), meeting automotive reliability standards for body electronics, infotainment, and ADAS subsystems. Its low jitter (<0.03% P-P at NDIV = 4096), supply-insensitive delay (<±0.1% variation from 2.25V to 5.5V), and robust noise immunity make it appropriate for under-dash and cabin modules.