TimerBlox™ Overview

Looking for a VCO, PWM generator, one-shot, delay, or other timing circuit? Before grabbing a timer or a microcontroller, consider one of Analog Devices' dedicated TimerBlox timing circuits. Using a built-in oscillator, these simple and accurate devices provide timing functions from μHz to MHz. No elaborate circuitry, memory or programming effort, just set and forget. It’s about time – your time.

TimerBlox devices combine an accurate programmable oscillator with precision circuitry and logic.  No capacitors, no crystals, no microcontroller and no programming are required.   Source and sink capability of 20mA enables the TimerBlox parts to directly drive opto-isolators and transformers for electrical isolation.  The small footprint allows each TimerBlox device to be placed at the point of use, providing an ideal solution for space-limited applications.

To speed and simplify your design process, TimerBlox Designer is an Excel based selection and synthesis tool that allows you to choose and configure the TimerBlox part best suited for your application.

LTC6990 VCO

Analog Devices' LTC6990 is a precision silicon oscillator with a programmable frequency range of 488Hz to 2MHz. It can be used as a fixed-frequency or voltage-controlled oscillator (VCO). The LTC6990 is part of the TimerBlox family of versatile silicon timing devices. A single resistor, RSET, programs the LTC6990’s internal master oscillator frequency. This master oscillator and an internal frequency divider, NDIV, programmable to eight settings from 1 to 128, determine the output frequency.

Optionally, a second resistor at the SET input provides linear voltage control of the output frequency and can be used for frequency modulation. A narrow or wide VCO tuning range can be configured by the appropriate selection of the two resistors. The LTC6990 includes an enable function that is synchronized with the master oscillator to ensure clean, glitch-free output pulses. The disabled output can be configured to be high impedance or forced low. Datasheet

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LTC6991 μHz Clock

Analog Devices' LTC6991 is a silicon oscillator with a programmable period range of 1.024ms to 9.54 hours (29.1μHz to 977Hz) that is specifically intended for long duration timing events. The LTC6991 is part of the TimerBlox™ family of versatile silicon timing devices.

A single resistor, RSET, programs the LTC6991’s internal master oscillator frequency. The output clock period is determined by this master oscillator and an internal frequency divider, NDIV, programmable to eight settings from 1 to 2²¹. Datasheet

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LTC6992 PWM

Analog Devices' LTC6992 is a silicon oscillator with an easy-to-use analog voltage-controlled pulse width modulation (PWM) capability. The LTC6992 is part of the TimerBlox™ family of versatile silicon timing devices.

A single resistor, RSET, programs the LTC6992’s internal master oscillator frequency. This master oscillator and an internal frequency divider, NDIV, programmable to eight settings from 1 to 16384, determine the output frequency. Datasheet

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LTC6993 One-Shot

Analog Devices' LTC6993 is a monostable multivibrator (also known as a “one-shot” pulse generator) with a programmable pulse width of 1 µs to 33.6 seconds. The LTC6993 is part of the TimerBlox™ family of versatile silicon timing devices. A single resistor, RSET, programs an internal master oscillator frequency, setting the LTC6993’s time base. The output pulse width is determined by this master oscillator and an internal clock divider, NDIV, programmable to eight settings from 1 to 2²¹. LTC6993 Datasheet

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LTC6994 Delay

The LTC6994 is a programmable delay block with a range of 1μs to 33.6 seconds. The LTC6994 is part of the TimerBlox family of versatile silicon timing devices.

A single resistor, R_SET, programs an internal master oscillator frequency, setting the LTC6994’s time base. The input-to-output delay is determined by this master oscillator and an internal clock divider, N_DIV, programmable to eight settings from 1 to 2²¹.

The output (OUT) follows the input (IN) after delaying the rising and/or falling transitions. The LTC6994-1 will delay the rising or falling edge. The LTC6994-2 will delay both transitions, and adds the option to invert the output.

The LTC6994 also offers the ability to dynamically adjust the delay time via a separate control voltage. LTC6994 Datasheet

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