Analog Devices Inc. LTC6994HDCB-2#TRPBF

Overview

LTC6994HDCB-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 operation from –40°C to 125°C in a 6-lead DFN (2mm × 3mm). It serves as a precision timing element for switch debouncing and noise discrimination in automotive control modules.

For engineers reviewing the LTC6994HDCB-2#TRPBF datasheet, LTC6994HDCB-2#TRPBF pinout, LTC6994HDCB-2#TRPBF application, or LTC6994HDCB-2#TRPBF equivalent, key selection criteria include guaranteed AEC-Q100 qualification, dual-edge delay capability with optional inversion, resistor-programmable timing accuracy, low 70µA supply current at 10µs delay, and validated performance across –40°C to 125°C.

Technical Context

The LTC6994HDCB-2#TRPBF 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 on the DIV pin sets both NDIV and the polarity bit (POL), where POL = 1 enables output inversion for the LTC6994-2 variant.

It features hysteresis on the IN pin (V_IH ≈ 0.55V₊ + 185mV, V_IL ≈ 0.48V₊ – 155mV), regulated 1V SET pin voltage (±30mV), and dynamic delay adjustment via I_SET current. The device enters idle mode when I_SET drops below ~500nA, halting the oscillator.

Key Specifications

Pinout & Package

Package: 6-Lead (2mm × 3mm) Plastic DFN (DCB), exposed pad connected to GND. RoHS-compliant, lead-free finish (LFCW marking).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC6994HDCB-1#TRPBF and MAX6816EUT+T, the LTC6994HDCB-2#TRPBF uniquely combines AEC-Q100 qualification, resistor-programmable dual-edge delay up to 33.6s, and output inversion-enabling robust, field-tunable timing in automotive and industrial systems where flexibility and reliability are mandatory.

Availability

LTC6994HDCB-2#TRPBF is available at Aetrix Electronics and suitable for automotive control modules, industrial motor drives, portable medical devices, and high-reliability embedded systems requiring stable component supply across extended temperature ranges.

Supply support for LTC6994HDCB-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 TimerBlox® family-including the LTC6994HDCB-2#TRPBF-is designed for precision silicon timing applications requiring programmable delay, pulse qualification, and robust operation in harsh environments without microcontroller dependency.

FAQ

What is the maximum delay time achievable with the LTC6994HDCB-2#TRPBF?

The LTC6994HDCB-2#TRPBF supports a maximum delay time of 33.6 seconds, achieved when NDIV = 2²¹ and R_SET = 800kΩ. This value is specified in the Electrical Characteristics table (t_DELAY MAX = 33.55 sec) and confirmed in the Typical Application section. The delay equation t_DELAY = NDIV × R_SET/50kΩ × 1µs governs all settings, and the LTC6994HDCB-2#TRPBF maintains this full range across its –40°C to 125°C operating temperature.

Does the LTC6994HDCB-2#TRPBF support output inversion, and how is it configured?

Yes, the LTC6994HDCB-2#TRPBF supports output inversion via the POL bit (most significant bit of DIVCODE). When POL = 1 (DIVCODE 8–15), the output is inverted-meaning a high input produces a low output after delay, and vice versa. This is exclusive to the LTC6994-2 variant and is configured using the resistor divider on the DIV pin; for example, DIVCODE = 8 corresponds to V_DIV/V₊ = 0.53125 ±1.5%, as shown in Table 1 of the datasheet.

What is the supply current consumption of the LTC6994HDCB-2#TRPBF at 2.25V and 10µs delay?

At V₊ = 2.25V and 10µs delay (R_SET = 50kΩ, NDIV = 1), the LTC6994HDCB-2#TRPBF consumes 70µA typical supply current in active mode, as specified in the Electrical Characteristics table under IS(IDLE) for RL = ∞, R_SET = 50kΩ, NDIV ≤ 64. This low quiescent current enables energy-efficient operation in battery-powered automotive and portable applications.

Is the LTC6994HDCB-2#TRPBF qualified for automotive applications, and what does that entail?

Yes, the LTC6994HDCB-2#TRPBF is AEC-Q100 qualified (Grade H, –40°C to 125°C), meaning it has undergone stress testing per the AEC-Q100 standard for reliability in automotive environments. This includes temperature cycling, humidity bias, ESD, and accelerated life testing. The "H" suffix explicitly denotes the high-temperature grade, and the part is manufactured with controlled processes to meet automotive quality and traceability requirements.

How does the LTC6994HDCB-2#TRPBF differ from the LTC6994HDCB-1#TRPBF in functionality?

The LTC6994HDCB-2#TRPBF delays both rising and falling edges of the IN signal and offers output inversion via the POL bit, whereas the LTC6994HDCB-1#TRPBF delays only one edge (rising or falling, selected by POL). Both share identical package, temperature rating, delay range, and electrical specs-but the LTC6994HDCB-2#TRPBF's dual-edge capability enables pulse-width control and noise rejection not possible with the -1 variant.