Analogue, Mixed Signal, LSI


Programmable digital delays

16 May 2012 Analogue, Mixed Signal, LSI

LSI/CSI announced the addition of four new devices to its family of programmable digital delay timer ICs. Designated LS7211N, LS7212N, LS7215 and LS7216, they provide delay times programmable from microseconds to days using eight binary-weighted delay bits.

An external clock or oscillator can be used as the time base for these ICs. The on-chip oscillator for the LS7211N and LS7215 is controlled by an external RC while the on-chip oscillator for the LS7212N and LS7216 is controlled by an external crystal.

The ICs can be operated in either of four operating modes: one-shot, delayed operate, delayed release and dual delay. Selectable prescalers are available to generate delays in units of minutes from 50 Hz/60 Hz frequency sources (LS7211N, LS7215) and delays in units of seconds or minutes from a watch crystal (LS7212N, LS7216).

The ability of the LS7215 and LS7216 to latch binary-weighted delay bits from a shared 8-bit bus opens up applications for use in a wide range of microcontroller-based systems. Typical applications include time delay relays for medical equipment, HVAC, automotive, security systems and lighting controls.

Providing added flexibility, the LS7215 and LS7216 have an open-drain output in addition to the standard push-pull output available on the LS7211N and LS7212N. This added output allows the IC to directly drive a relay coil returned to the same voltage as the chip VDD or, using one external transistor, the IC can control a relay coil returned to a voltage as high as 110 V with a chip VDD as low as 3 V. The push-pull output can be used to light an LED to indicate that the relay coil is energised.





Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Dual-range IMU with edge processing
EBV Electrolink Analogue, Mixed Signal, LSI
ST’s innovative LSM6DSV80X combines two accelerometer structures for 16 g and 80 g full-scale sensing, a gyroscope up 4000 dps, and embedded intelligence in a single component.

Read more...
High-reliability isolation amplifiers
EBV Electrolink Analogue, Mixed Signal, LSI
The VIA series of isolation amplifiers from Vishay are designed to deliver exceptional thermal stability and precise measurement capabilities.

Read more...
Mibbo QT2C Series signal isolators
Conical Technologies Analogue, Mixed Signal, LSI
The Mibbo QT2C Series isolators support a rich combination of input and output signals, working with either current loops or voltage levels.

Read more...
IMU with dual-sensing capability
EBV Electrolink Analogue, Mixed Signal, LSI
ST’s 6-axis inertial measurement unit integrates a dual accelerometer up to 320g and embedded AI for activity tracking and high-impact sensing.

Read more...
Plural data converter series
Analogue, Mixed Signal, LSI
Silanna Semiconductor has announced the launch of Plural, a new generation of data converters for customers eager to find a more available, affordable, high-performance alternative to existing brands.

Read more...
Precision JFET op-amp
Altron Arrow Analogue, Mixed Signal, LSI
The specifications of the ADA4620 make it optimal as a front-end amplifier in a data-acquisition system, or for a TIA circuit with high input impedance.

Read more...
A new era in modular I/O solutions
Rugged Interconnect Technologies Analogue, Mixed Signal, LSI
Aerospace and defence system designers are demanding scalable and high-performance I/O solutions and while traditional mezzanine standards have proven reliable, they often fall short of meeting modern bandwidth, size, and flexibility requirements.

Read more...
High voltage instrument op-amp
iCorp Technologies Analogue, Mixed Signal, LSI
The SGM621B is a high accuracy, high voltage instrumentation amplifier, which is designed to set any gain from 1 to 10 000 with one external resistor.

Read more...
High-speed SAR ADC simplifies design
Altron Arrow Analogue, Mixed Signal, LSI
The ADI AD4080 simplifies data converter integration by integrating a low drift reference buffer, low dropout regulators and a 16K result data FIFO buffer.

Read more...
2-wire quad voltage output DAC
Altron Arrow Analogue, Mixed Signal, LSI
The DAC has a 2-wire serial interface that operates at clock rates up to 400 kHz, and this interface is SMBus compatible, allowing multiple devices to be placed on the same bus.

Read more...









While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.




© Technews Publishing (Pty) Ltd | All Rights Reserved