Lsi Computer Systems, Inc.

Construction Equipment and Supplies

Differential Line Drivers provide high output drive current.

Operating up to 4 MHz with input voltage range of 4.5-30 V, quad-channel Models LS7272 and LS7273 provide 120 mA sink output current drive and 1.5 A dynamic peak output current drive. Model LS7272 has input to select either push-pull or open drain outputs with loads on open drain outputs returnable to power supply voltage or lower, while Model LS7273 has only open drain outputs with loads...

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Controls & Controllers

Light Dimmers provide control via manual or uC interface.

With supply voltage of 5 V, Model LS7642 powers up in Off state, while Model LS7642FO powers up in On state to illumination set by control voltage. Analog voltage at control input directly determines phase angle of triac trigger pulse. For automated applications, control voltage can be provided by uC, yielding accurate control of dimming patterns. For manual applications such as wall switches,...

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Quadrature Clock Converter ICs help ease MCU burden.
Electrical Equipment & Systems

Quadrature Clock Converter ICs help ease MCU burden.

Models LS7082N1/LS7083N/LS7084N/LS7183N/LS7184N interface between incremental encoders and counting devices by converting encoder quadrature outputs into directional up/down clocks or clock and direction signals for driving counting devices. When interfaced with MCUs, devices can free up resources by relieving computational burden used for decoding quadrature signals. ICs offer x1, x2, or x4...

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Reverse Phase Dimmers eliminate external RFI filtering.
Controls & Controllers

Reverse Phase Dimmers eliminate external RFI filtering.

Supplied in 8-pin DIP and SOIC packages, LS7636/LS7636FO/LS7637/LS7637FO are lighting control ICs turn on drive transistors at zero-crossover point of each half cycle to enable slow current rise. Current is terminated later during half-cycle, depending on desired dimming level, and RFI generation is minimized since power to load is not turned on abruptly. Able to drive any Electronic Transformer,...

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Quadrature Counter IC offers multi-mode programmability.
Electrical Equipment & Systems

Quadrature Counter IC offers multi-mode programmability.

Operating over voltage range of 3-5.5 V, 32-bit Model LS7366R with SPI decodes and counts quadrature clocks directly from incremental encoders, offering solution to position and displacement tracking at 40 x 106/sec line rate from encoder and count limit of 232. Unit can also operate with non-quadrature clock signals and provides various counting modes for signal conditioning. Programming and...

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PIR Sensor Interface IC controls any type of AC load.
Electrical Equipment & Systems

PIR Sensor Interface IC controls any type of AC load.

Designed to drive latching relay, LS6506R can be used in Wall Switch configuration (no Neutral) to enable full AC Mains cycle to be applied across any load. Also available, LS6507R drives triac in series with load and is suitable for use in lower-cost Wall Switch configuration for driving incandescent lamp loads. ICs can be used to manually or automatically switch loads on/off, and feature is...

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Controller ICs are available for bipolar and unipolar motors.
Controls & Controllers

Controller ICs are available for bipolar and unipolar motors.

Models LS8297, LS8297CT, and LS8397 Stepper Motor Controller ICs offer half-step and full-step sequences in both normal drive and wave drive modes. LS8297CT and LS8397 models offer correction for torque-ripple, while LS8397 is also available with power saving holding-torque mode for maintaining drivers at reduced power level when motor is not turning. Four phase outputs and 2 inhibit outputs are...

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Counter ICs feature interfaces for incremental encoders.
Electrical Equipment & Systems

Counter ICs feature interfaces for incremental encoders.

Available in single- or dual-axis versions, Series LS7766 has max count frequency of 40 MHz and count range of 32 bits to support applications where large magnitudes of data are involved. Configurable octal/hex parallel IO bus optimizes system throughput, while multiple counting modes relieve host microcontroller of control and data formatting tasks. Quadrature signals from encoder are validated...

Read More »
Controls & Controllers

Stepper Motor Controller works with bipolar/unipolar motors.

Offered in various packages, LS7290 is programmable for 6 step sizes from full to 1/32 step and offers max stepping rate over 30k/sec. IC works with 2-phase bipolar stepper motors, interfacing with external dual full bridge driver and 4-phase unipolar stepper motors, where PWM and phase control outputs interface with 4 AND gates driving 4 NMOS driver transistors. Inputs are available to control...

Read More »
Construction Equipment and Supplies

Differential Line Drivers provide high output drive current.

Operating up to 4 MHz with input voltage range of 4.5-30 V, quad-channel Models LS7272 and LS7273 provide 120 mA sink output current drive and 1.5 A dynamic peak output current drive. Model LS7272 has input to select either push-pull or open drain outputs with loads on open drain outputs returnable to power supply voltage or lower, while Model LS7273 has only open drain outputs with loads...

Read More »
Company News

Edge Electronics Announces Alliance with LSI Computer Systems

Bohemia, NY and Melville, NY, October 1, 2010 - Edge Electronics, Inc., a National & International Distributor of electronic components, today announced a new agreement with LSI Computer Systems, Inc. to distribute the company's product line of standard integrated circuits. Like Edge Electronics, LSI provides a high degree of technical support to both our partners and customers. The alliance...

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Controls & Controllers

Light Dimmers provide control via manual or uC interface.

With supply voltage of 5 V, Model LS7642 powers up in Off state, while Model LS7642FO powers up in On state to illumination set by control voltage. Analog voltage at control input directly determines phase angle of triac trigger pulse. For automated applications, control voltage can be provided by uC, yielding accurate control of dimming patterns. For manual applications such as wall switches,...

Read More »
Quadrature Clock Converter ICs help ease MCU burden.
Electrical Equipment & Systems

Quadrature Clock Converter ICs help ease MCU burden.

Models LS7082N1/LS7083N/LS7084N/LS7183N/LS7184N interface between incremental encoders and counting devices by converting encoder quadrature outputs into directional up/down clocks or clock and direction signals for driving counting devices. When interfaced with MCUs, devices can free up resources by relieving computational burden used for decoding quadrature signals. ICs offer x1, x2, or x4...

Read More »
Reverse Phase Dimmers eliminate external RFI filtering.
Controls & Controllers

Reverse Phase Dimmers eliminate external RFI filtering.

Supplied in 8-pin DIP and SOIC packages, LS7636/LS7636FO/LS7637/LS7637FO are lighting control ICs turn on drive transistors at zero-crossover point of each half cycle to enable slow current rise. Current is terminated later during half-cycle, depending on desired dimming level, and RFI generation is minimized since power to load is not turned on abruptly. Able to drive any Electronic Transformer,...

Read More »
Quadrature Counter IC offers multi-mode programmability.
Electrical Equipment & Systems

Quadrature Counter IC offers multi-mode programmability.

Operating over voltage range of 3-5.5 V, 32-bit Model LS7366R with SPI decodes and counts quadrature clocks directly from incremental encoders, offering solution to position and displacement tracking at 40 x 106/sec line rate from encoder and count limit of 232. Unit can also operate with non-quadrature clock signals and provides various counting modes for signal conditioning. Programming and...

Read More »
PIR Sensor Interface IC controls any type of AC load.
Electrical Equipment & Systems

PIR Sensor Interface IC controls any type of AC load.

Designed to drive latching relay, LS6506R can be used in Wall Switch configuration (no Neutral) to enable full AC Mains cycle to be applied across any load. Also available, LS6507R drives triac in series with load and is suitable for use in lower-cost Wall Switch configuration for driving incandescent lamp loads. ICs can be used to manually or automatically switch loads on/off, and feature is...

Read More »
Controller ICs are available for bipolar and unipolar motors.
Controls & Controllers

Controller ICs are available for bipolar and unipolar motors.

Models LS8297, LS8297CT, and LS8397 Stepper Motor Controller ICs offer half-step and full-step sequences in both normal drive and wave drive modes. LS8297CT and LS8397 models offer correction for torque-ripple, while LS8397 is also available with power saving holding-torque mode for maintaining drivers at reduced power level when motor is not turning. Four phase outputs and 2 inhibit outputs are...

Read More »
Counter ICs feature interfaces for incremental encoders.
Electrical Equipment & Systems

Counter ICs feature interfaces for incremental encoders.

Available in single- or dual-axis versions, Series LS7766 has max count frequency of 40 MHz and count range of 32 bits to support applications where large magnitudes of data are involved. Configurable octal/hex parallel IO bus optimizes system throughput, while multiple counting modes relieve host microcontroller of control and data formatting tasks. Quadrature signals from encoder are validated...

Read More »
Controls & Controllers

Stepper Motor Controller works with bipolar/unipolar motors.

Offered in various packages, LS7290 is programmable for 6 step sizes from full to 1/32 step and offers max stepping rate over 30k/sec. IC works with 2-phase bipolar stepper motors, interfacing with external dual full bridge driver and 4-phase unipolar stepper motors, where PWM and phase control outputs interface with 4 AND gates driving 4 NMOS driver transistors. Inputs are available to control...

Read More »

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