Analog Devices Inc. LTC6994IDCB-2#TRMPBF

Overview

LTC6994IDCB-2#TRMPBF from Analog Devices is a programmable dual-edge delay block with 1µs–33.6s range, ±2.3% max delay error (for delays >512µs), 2.25V–5.5V supply, and CMOS output sourcing/sinking 20mA. It operates across –40°C to +85°C in a 6-lead 2mm × 3mm DFN package and is used for switch debouncing, noise discrimination, and pulse qualification in industrial control systems.

For engineers reviewing the LTC6994IDCB-2#TRMPBF datasheet, LTC6994IDCB-2#TRMPBF pinout, LTC6994IDCB-2#TRMPBF application, or LTC6994IDCB-2#TRMPBF equivalent, key selection criteria include delay accuracy over temperature, dual-edge delay capability with polarity inversion, RSET-based timing programming, and automotive-grade AEC-Q100 qualification for harsh environments.

Technical Context

The LTC6994IDCB-2#TRMPBF implements a master oscillator with t_MASTER = 1µs × R_SET/50kΩ, followed by an 8-step programmable divider (NDIV = 1, 8, 64, ..., 2²¹) to achieve its full delay range. Its internal 4-bit A/D converter reads the DIV pin voltage to set both NDIV and the POL bit, enabling output inversion when POL = 1.

Unlike the LTC6994-1, the LTC6994-2 variant delays both rising and falling edges of the IN signal, and supports dynamic delay adjustment via the SET pin current (I_SET = 1.25µA–20µA). The device features hysteresis on the IN pin (VIN(RISING) ≈ 0.55×V+ + 185mV) and guarantees 500µs start-up time at V+ = 2.25V with R_SET = 800kΩ.

Key Specifications

Pinout & Package

Package: 6-lead (2mm × 3mm) plastic DFN with exposed pad connected to GND. Pin 7 (exposed pad) is optional for PCB connection but recommended for thermal and noise performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6816EUT+T and TPS3808G01DBVR, the LTC6994IDCB-2#TRMPBF offers uniquely flexible dual-edge delay, resistor-based fine-tuning down to 1µs, and direct CMOS drive - making it the sole choice for precision pulse qualification and adaptive timing in space-constrained designs.

Availability

LTC6994IDCB-2#TRMPBF is available at Aetrix Electronics and suitable for industrial control systems, automotive sensor interfaces, portable medical devices, and high-reliability embedded applications requiring stable component supply across extended temperature ranges.

Supply support for LTC6994IDCB-2#TRMPBF 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#TRMPBF-is designed for standalone, pin-configurable timing functions that eliminate microcontroller dependency in signal conditioning, debouncing, and delay-critical subsystems.

FAQ

What is the minimum delay achievable with the LTC6994IDCB-2#TRMPBF?

The LTC6994IDCB-2#TRMPBF achieves a minimum delay of 1µs when configured with R_SET = 50kΩ and NDIV = 1. This is guaranteed across the full –40°C to +85°C operating range, with ±5.1% accuracy for delays between 1µs and 8µs. The 1µs resolution enables precise timing for high-speed digital interface qualification and glitch filtering.

How does the LTC6994IDCB-2#TRMPBF differ from the LTC6994-1 variants?

The LTC6994IDCB-2#TRMPBF delays both rising and falling edges of the IN signal, whereas LTC6994-1 variants delay only one edge. Additionally, the LTC6994IDCB-2#TRMPBF uses the DIV pin's MSB (POL bit) to invert the output rather than select edge type. This makes the LTC6994IDCB-2#TRMPBF ideal for generating defined-width pulses and noise-immune signal conditioning in bidirectional interfaces.

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

Yes, the LTC6994IDCB-2#TRMPBF operates from 2.25V to 5.5V, including 2.5V. At 2.5V, it delivers ±20mA output drive with VOH ≥ 1.58V (at –8mA) and VOL ≤ 0.54V (at +8mA), maintaining full logic compatibility. Supply current drops to 55–90µA depending on R_SET and NDIV, supporting ultra-low-power portable designs.

What is the role of the exposed pad (Pin 7) on the LTC6994IDCB-2#TRMPBF DFN package?

The exposed pad (Pin 7) on the LTC6994IDCB-2#TRMPBF is internally connected to GND and serves as the primary thermal and electrical ground path. While PCB connection is optional per datasheet, soldering it to a thermal pad significantly improves θ_JA (from 64°C/W to <40°C/W) and reduces ground noise coupling-critical for jitter-sensitive delay applications and automotive EMI compliance.

Is the LTC6994IDCB-2#TRMPBF AEC-Q100 qualified?

Yes, the LTC6994IDCB-2#TRMPBF is AEC-Q100 qualified for automotive applications. It meets Grade 3 (–40°C to +85°C) requirements, including stress testing for temperature cycling, humidity, and mechanical shock. This qualification is explicitly stated in the Analog Devices order information table and supported by Automotive Reliability reports available through authorized distributors.