Product category:
Analogue and Mixed Signal ICs
News Release from: Catalyst Semiconductor | Subject: CAT5409 and CAT5419
Edited by the Electronicstalk Editorial
Team on 21 March 2003
Onboard memory provides flexible digital
pots
The linear-taper quad CAT5409 and dual CAT5419 are 64-tap nonvolatile digital potentiometers that are controlled over a 400kHz two-wire interface bus.
The linear-taper quad CAT5409 and dual CAT5419 are 64-tap nonvolatile digital potentiometers that are controlled over a 400kHz two-wire interface bus Unlike most digital potentiometers, the CAT5409 and CAT5419 allow four wiper positions to be stored per potentiometer in nonvolatile, on-chip EEPROM
This article was originally published on Electronicstalk on 7 Feb 2002 at 8.00am (UK)
Related stories
Digitally programmable potentiometers to take over
Catalyst Semiconductor has added two new digitally programmable potentiometer (DPP) ICs to its AE2 (analogue EEPROM) mixed-signal product line.
EEPROM provides more secure MPU supervision
Catalyst Semiconductor has expanded its AE2 analogue EEPROM mixed-signal product strategy with the CAT116x series of microprocessor supervisory circuits with serial 16Kbit EEPROM.
If an application does not require multiple wiper position storage, the nonvolatile 6bit storage registers can store system parameters or other system data.
"The CAT5409 and CAT5419 feature nonvolatile storage of multiple wiper positions per potentiometer and a write protection pin that secures stored wiper positions in the DPP IC", said Catalyst Product Marketing Manager Gary Craig.
"Our DPP ICs continue to be designed for low cost with added capability.
We are passing our cost savings on to customers in the form of substantial price reductions when compared to competitive devices.
Low price doesn't come with a performance sacrifice.
For example, we designed a very reliable power-on-recall circuit that loads each pot's stored wiper position when power is applied".
Digitally programmable potentiometers can be used to bias laser diodes in fibre-optic transceiver modules, bias RF amplifiers, adjust display brightness and contrast, adjust sensors and trim power supply voltages.
The CAT5409 and CAT5419 are offered with 2.5, 10, 50 and 100kohm resistance options.
Saved wiper settings are automatically recalled during power-up.
Maximum wiper resistance is a low 150ohm (80ohm typical) at 5V and 300 ohms maximum at 3V.
Maximum standby power is 5uW at 5V, ideal for battery-powered equipment.
The devices operate from a single power supply voltage range of 2.5 to 6.0V.
The quad CAT5409 and dual CAT5419 digital potentiometers are available in 24-lead SOIC and TSSOP packages.
A ball grid array package is also planned.
Lead-free, halogen-free "green" package options are also available.
Commercial, 0 to 70C, and industrial, -40 to +85C, temperature range devices are offered.
Prices start at $1.25 in 1000-piece quantities.
Devices are available for sampling now with production volume scheduled for the second quarter of 2003.
• Catalyst Semiconductor: contact details and other news
• Email this article to a colleague
• Register for the free Electronicstalk email newsletter
• Electronicstalk Home Page
Search the Pro-Talk network of sites
