Analog Devices Inc. LTC6994HS6-2#WTRMPBF

Overview

LTC6994HS6-2#WTRMPBF from Analog Devices is a TimerBlox® programmable delay block optimized for automotive-grade timing applications. It delays both rising and falling edges of digital inputs with precision over 1µs–33.6s range, supports dynamic delay adjustment via control voltage, operates from –40°C to 125°C, and features CMOS output sourcing/sinking 20mA - used in switch debouncing and noise discrimination in high-vibration environments.

For engineers reviewing the LTC6994HS6-2#WTRMPBF datasheet, LTC6994HS6-2#WTRMPBF pinout, LTC6994HS6-2#WTRMPBF application, or LTC6994HS6-2#WTRMPBF equivalent, this page delivers verified electrical specs, SOT-23 package mapping, automotive qualification status, delay accuracy vs. temperature, and real-world use-value for pulse qualification and edge-controlled timing in harsh environments.

Technical Context

The LTC6994HS6-2#WTRMPBF implements a master oscillator (t_MASTER = 1µs × R_SET/50kΩ) feeding 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 reads DIV pin voltage to set NDIV and polarity (POL bit), enabling dual-edge delay plus optional output inversion.

It integrates hysteresis on the IN pin (VIN(RISING) ≈ 0.55×V+ + 185mV; VIN(FALLING) ≈ 0.48×V+ – 155mV), regulates V_SET to 1.00V ±30mV, and halts oscillator when I_SET < 500nA - ensuring deterministic start-up and low-power idle operation at 55–175µA depending on R_SET and NDIV.

Key Specifications

Pinout & Package

Package: 6-Lead Plastic TSOT-23 (S6), 1mm profile, RoHS-compliant, lead-free finish (LTFCX marking). Exposed pad not present in SOT-23 variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC6994IS6-2#TRPBF, the LTC6994HS6-2#WTRMPBF adds AEC-Q100 qualification and extended high-temp operation, making it mandatory for safety-critical automotive subsystems; versus MAX6373ESA+, it provides full programmability, dual-edge control, and 1µs resolution - enabling new timing architectures rather than just substituting fixed delays.

Availability

LTC6994HS6-2#WTRMPBF is available at Aetrix Electronics and suitable for automotive electronic control units, battery management systems, and industrial motor controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC6994HS6-2#WTRMPBF 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 LTC6994HS6-2#WTRMPBF - was designed to replace discrete RC timing networks and microcontroller-based delays with highly accurate, low-power, single-chip silicon timing solutions for harsh-environment applications.

FAQ

What is the maximum delay time achievable with LTC6994HS6-2#WTRMPBF?

The LTC6994HS6-2#WTRMPBF supports a maximum delay of 33.6 seconds, achieved when NDIV = 2²¹ (2,097,152) and R_SET = 800kΩ. This is calculated using t_DELAY = NDIV × R_SET / 50kΩ × 1µs. The device maintains ±5.1% accuracy at the shortest 1µs delay and ±2.3% at delays exceeding 512µs, verified across its –40°C to +125°C operating range.

Does LTC6994HS6-2#WTRMPBF support inverting the output signal?

Yes, LTC6994HS6-2#WTRMPBF supports output inversion via the POL bit (MSB of DIVCODE). When DIVCODE = 8–15, POL = 1 activates inversion while maintaining dual-edge delay functionality. This allows generation of complementary timing waveforms without external inverters - useful in H-bridge gate drive sequencing and differential pulse generation.

How does the start-up behavior of LTC6994HS6-2#WTRMPBF affect system initialization?

LTC6994HS6-2#WTRMPBF has a typical start-up time of 500 × t_MASTER, ranging from ~500µs (R_SET = 50kΩ) to ~8ms (R_SET = 800kΩ). During this period, OUT is held low and IN is ignored. At completion, the output reflects the IN state - critical for synchronizing power-on sequences in automotive ECUs where deterministic timing post-reset is required.

Can LTC6994HS6-2#WTRMPBF operate reliably in high-EMI automotive environments?

Yes, LTC6994HS6-2#WTRMPBF is designed for high-EMI environments: it features hysteresis on the IN pin (thresholds scale with V+), low sensitivity to supply ripple (<0.9% delay change over 2.25–5.5V), and strict layout guidance (e.g., <100pF on DIV pin, 0.1µF V+/GND bypass). Its AEC-Q100 qualification confirms robustness against conducted/radiated emissions per ISO 11452 and immunity per ISO 10605.

What is the role of the SET pin in LTC6994HS6-2#WTRMPBF timing accuracy?

The SET pin regulates V_SET to 1.00V ±30mV and sinks I_SET = V_SET/R_SET. Since t_MASTER = 1µs × R_SET/50kΩ, timing accuracy depends primarily on R_SET tolerance and temperature coefficient - not V_SET drift. Using a 0.5% metal-film resistor with ≤50ppm/°C TC ensures <1% total delay error contribution from the programming network in LTC6994HS6-2#WTRMPBF.