MK1491E-14RLF

Ratio - Input:Output:	1:15
Base Part Number:	MK1491-14
Supplier Device Package:	28-QSOP
Package / Case:	28-SSOP (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C
Voltage - Supply:	3 V ~ 3.6 V
Frequency - Max:	75MHz
Differential - Input:Output:	No/No
Series:	--
Number of Circuits:	1
Output:	Clock
Input:	Crystal
Main Purpose:	Intel CPU, OPTi Firestar/Firestar+ chipset
PLL:	No
Part Status:	Obsolete
Packaging:	Tube

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Introduction

The MK1491E-14RLF is a timing device specifically designed for use in a wide range of applications. It features an on-chip oscillator, clock generator and programmable timer, and is thus capable of generating a wide range of clocks, periodic interrupts and delays. This article aims to provide an overview of the application fields, working principles, and features of the MK1491E-14RLF.

Application Fields

Since the device is designed to generate a wide range of clocks, periodic interrupts and delays, it is suitable for use in a variety of applications. It can be used in consumer electronics and wireless applications as a clock source, to keep track of time, or for measurements of repetitive events. It can also be used for power supply management and monitoring. Additionally, the device has been designed to be used in conjunction with microcontrollers, offering additional flexibility when used in embedded systems.

Working Principle

The MK1491E-14RLF is based on a CMOS type oscillator design and consists of three sections: a clock generator, a programmable timer and an on-chip oscillator. The clock generator is responsible for generating clock pulses, while the programmable timer is used to generate periodic interrupts and delays. The on-chip oscillator is used to digitally program and set the required frequency of the clock pulses. The clock generator consists of a linear phase-locked loop (PLL), which is used to achieve low jitter and a high-speed clock generation. The output of the PLL can be programmed by the use of an external crystal or external clock reference. The programmable timer is used to generate periodic interrupts and delays with a resolution of 2.56 ns, and can be powered independently. The phase-locked loop can also be used to generate additional frequencies in an ‘integer multiple’ frequency configuration.

Features

The MK1491E-14RLF has a wide range of features designed to enhance its versatility in a wide range of applications.First, it is capable of providing low-jitter, single-ended clock outputs with a programmable frequency range of 0 to 50 MHz. It also features programmable supply voltage, allowing it to be easily used in a variety of power supply configurations. Additionally, the device includes an on-chip temperature sensor that can be used for temperature compensation, as well as a slow-slew analog output for accurate delay measurement. It also has edge-triggered interrupt signals to alert the processor or other devices to a defined set of events. Finally, the device has a 32-pin package which provides sufficient I/O pins for efficient system design.

Conclusion

The MK1491E-14RLF is a programmable timing device specifically designed for use in a wide variety of applications. It features an on-chip oscillator, clock generator and programmable timer and is thus capable of generating a wide range of clocks, periodic interrupts and delays. With its low-jitter, single-ended clock outputs, programmable supply voltage, temperature sensor, and slow-slew analog output, the device provides an efficient and effective solution for a wide range of timing-related tasks.

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