Analog Devices Inc. LTC6994CS6-1#TRPBF

Overview

LTC6994CS6-1#TRPBF from Analog Devices is a programmable monostable delay block (TimerBlox® family) that delays rising-edge transitions only, with 1µs to 33.6s range, ±2.3% max error for delays >512µs, 2.25V–5.5V supply, and 70µA current at 10µs delay - used in switch debouncing and noise discrimination in portable equipment.

For engineers reviewing the LTC6994CS6-1#TRPBF datasheet, LTC6994CS6-1#TRPBF pinout, LTC6994CS6-1#TRPBF application, or LTC6994CS6-1#TRPBF equivalent, this page delivers verified timing accuracy, SOT-23 package constraints, edge-selective delay behavior, and automotive-grade AEC-Q100 qualification context for reliable embedded timing design.

Technical Context

The LTC6994CS6-1#TRPBF implements a master oscillator (t_MASTER = 1µs × R_SET/50kΩ) feeding an 8-step programmable divider (NDIV = 1, 8, 64, ..., 2²¹) to set total delay t_DELAY = NDIV × R_SET/50kΩ × 1µs. Its internal 4-bit A/D converter reads DIV pin voltage to select both NDIV and POL bit.

POL = 0 configures rising-edge-only delay (LTC6994-1 function); input hysteresis ensures robustness against slow/noisy edges; V_SET is regulated to 1.00V ±30mV, making delay independent of V_SET drift when using R_SET.

Key Specifications

Pinout & Package

6-Lead Plastic TSOT-23 (S6) package, 1mm profile, exposed pad optional, rated for –55°C to 125°C junction temperature.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC6994IS6-1#TRPBF, the LTC6994CS6-1#TRPBF trades extended temperature range for lower cost and commercial qualification; versus MAX6816EUT+T, it offers 33-million-fold wider delay range and resistor-based precision at higher quiescent current.

Availability

LTC6994CS6-1#TRPBF is available at Aetrix Electronics and suitable for industrial switch debouncing, noise-discriminating pulse qualification, and battery-powered equipment timing requiring stable component supply across production lifecycles.

Supply support for LTC6994CS6-1#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® product line - including LTC6994CS6-1#TRPBF - was designed to replace discrete RC timers and microcontroller-based delays with compact, accurate, zero-software analog timing blocks for embedded systems.

FAQ

What is the maximum delay achievable with the LTC6994CS6-1#TRPBF?

The LTC6994CS6-1#TRPBF supports a maximum delay of 33.6 seconds, achieved when NDIV = 2²¹ and R_SET = 800kΩ. This value is specified in the Electrical Characteristics table under t_DELAY (MAX) and confirmed in the Typical Application section. The delay equation t_DELAY = NDIV × R_SET/50kΩ × 1µs yields 33.55s, rounded to 33.6s in official documentation for the LTC6994CS6-1#TRPBF.

Does the LTC6994CS6-1#TRPBF support falling-edge delay?

No, the LTC6994CS6-1#TRPBF is the LTC6994-1 variant and delays only rising-edge transitions when POL = 0 (default configuration). Falling-edge delay requires POL = 1, which is not supported in the -1 version - that function is exclusive to LTC6994-2 parts like LTC6994CS6-2#TRPBF. The datasheet explicitly states "The LTC6994-1 will delay the rising or falling edge" (i.e., one or the other, not both), and Figure 3/Figure 4 confirm separate rising/falling modes - but only one active per configuration.

What is the recommended R_SET tolerance for precision timing with the LTC6994CS6-1#TRPBF?

Analog Devices recommends a precision metal or thin-film resistor with 0.5% or better tolerance and ≤50ppm/°C temperature coefficient for R_SET when using the LTC6994CS6-1#TRPBF in high-accuracy applications. This is stated in the PIN FUNCTIONS section under SET pin description. Lower-cost 1% thick-film resistors are acceptable for non-critical timing, but introduce additional error beyond the device's inherent ±2.3% delay accuracy spec.

Can the LTC6994CS6-1#TRPBF operate from a 2.25V supply?

Yes, the LTC6994CS6-1#TRPBF is fully specified to operate from 2.25V to 5.5V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. At 2.25V, it delivers 70µA supply current at 10µs delay, maintains CMOS-compatible output levels (V_OH ≥ 2.17V, V_OL ≤ 0.07V at 8mA load), and retains full delay accuracy and start-up functionality - making it suitable for single-cell Li-ion or low-voltage IoT designs.

Is the LTC6994CS6-1#TRPBF AEC-Q100 qualified?

No, the LTC6994CS6-1#TRPBF is not AEC-Q100 qualified. It is a commercial-grade part rated for 0°C to 70°C operation. AEC-Q100 qualified versions exist (e.g., LTC6994HS6-1#WTRPBF for –40°C to 125°C), but they carry the "#W" automotive suffix and distinct part numbers. The datasheet's ORDER INFORMATION table lists LTC6994CS6-1#TRPBF under non-automotive packages, and the Automotive Products section explicitly states only #W-suffixed parts meet automotive reliability requirements.