Analog Devices Inc. LTC6994IDCB-1#TRPBF

Overview

LTC6994IDCB-1#TRPBF from Analog Devices is a TimerBlox programmable delay block configured for rising- or falling-edge-only delay (LTC6994-1 variant), operating from 2.25V to 5.5V, delivering 1µs–33.6s delay with ±2.3% max error (>512µs), 70µA supply current at 10µs delay, and CMOS 20mA output drive in a 6-lead 2mm × 3mm DFN package. It serves as a precision debouncer and noise discriminator in high-vibration industrial controls.

For engineers reviewing the LTC6994IDCB-1#TRPBF datasheet, LTC6994IDCB-1#TRPBF pinout, LTC6994IDCB-1#TRPBF application, or LTC6994IDCB-1#TRPBF equivalent, key selection criteria include edge-selective delay mode (POL bit), RSET-resistor-based timing accuracy, temperature-stable VSET regulation (1.00V ±30mV), –40°C to 85°C industrial-grade operation, and dynamic DIV pin reconfiguration capability.

Technical Context

The LTC6994IDCB-1#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 scale delay range. Its edge-controlled logic delays only one transition type per configuration (rising or falling), determined by the MSB of the 4-bit DIVCODE applied to the DIV pin.

Internal 4-bit A/D conversion of V_DIV sets both NDIV and POL bit; V_SET is regulated to 1.00V ±30mV to decouple delay accuracy from supply variation, while I_SET (1.25µA–20µA) directly programs oscillator frequency. Propagation delay is 10ns (V+ = 5.5V), and start-up time is 500 × t_MASTER, typically 500µs at R_SET = 50kΩ.

Key Specifications

Pinout & Package

Package: 6-lead plastic DFN (2mm × 3mm), exposed pad connected to GND. Pin 7 (exposed pad) is electrically GND and may be soldered to PCB ground plane for improved thermal performance and noise immunity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC6994IDCB-2#TRPBF and MAX6816EUT+T, the LTC6994IDCB-1#TRPBF uniquely balances edge-selective precision, resistor-based scalability, and industrial temperature support-making it optimal for adaptive timing in embedded control systems where delay mode must be configurable per signal path.

Availability

LTC6994IDCB-1#TRPBF is available at Aetrix Electronics and suitable for industrial automation, motor control, and battery-powered sensor interface applications requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-aligned reliability.

Supply support for LTC6994IDCB-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, 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 LTC6994IDCB-1#TRPBF-is designed for plug-and-play timing functions in space-constrained embedded systems, eliminating crystal oscillators, microcontrollers, or discrete RC networks for delay, debounce, and pulse qualification.

FAQ

What is the maximum delay achievable with the LTC6994IDCB-1#TRPBF?

The LTC6994IDCB-1#TRPBF achieves a maximum delay of 33.6 seconds using NDIV = 2²¹ and R_SET = 800kΩ. This is calculated as t_DELAY = NDIV × R_SET / 50kΩ × 1µs. At this setting, delay accuracy is ±5.1% for 1µs–8µs ranges but improves to ±2.3% for delays exceeding 512µs. The LTC6994IDCB-1#TRPBF maintains full functionality across its entire range without external components.

How does the POL bit configure edge delay behavior in the LTC6994IDCB-1#TRPBF?

In the LTC6994IDCB-1#TRPBF, the POL bit (MSB of DIVCODE) selects between rising-edge delay (POL = 0) and falling-edge delay (POL = 1). This is implemented via internal edge-detection logic that ignores the non-selected transition. Unlike the LTC6994-2 variant, the LTC6994IDCB-1#TRPBF never delays both edges simultaneously-ensuring deterministic single-edge timing critical for encoder A/B channel alignment or asymmetric signal conditioning.

Can the LTC6994IDCB-1#TRPBF operate from a 2.5V supply?

Yes, the LTC6994IDCB-1#TRPBF operates over 2.25V to 5.5V, fully specified at 2.5V. At V+ = 2.25V, it delivers ±20mA output drive, 24ns propagation delay, and 55–95µA supply current depending on R_SET and NDIV. Output high/low voltages meet CMOS thresholds (VOH ≥ 2.17V, VOL ≤ 0.26V at IOUT = ±8mA), ensuring compatibility with 2.5V logic families without level shifters.

What is the role of the SET pin in the LTC6994IDCB-1#TRPBF, and how is timing set?

The SET pin on the LTC6994IDCB-1#TRPBF sinks current (I_SET) to program the master oscillator frequency. A resistor (R_SET) from SET to GND sets I_SET = V_SET/R_SET, where V_SET is internally regulated to 1.00V ±30mV. This regulation ensures timing depends only on R_SET tolerance-not supply or temperature drift. R_SET values from 50kΩ to 800kΩ yield I_SET from 20µA to 1.25µA, covering the full 1µs–33.6s delay range.

Does the LTC6994IDCB-1#TRPBF require external passive components for basic operation?

Yes-the LTC6994IDCB-1#TRPBF requires three external components for standard operation: (1) a 0.1µF ceramic capacitor from V+ to GND for power supply bypassing, (2) an R_SET resistor from SET to GND to define master oscillator period, and (3) a resistor divider (R1/R2) on the DIV pin to set NDIV and POL. No crystal, inductor, or additional ICs are needed. All timing parameters derive directly from these resistors, making the LTC6994IDCB-1#TRPBF a self-contained timing solution.