Product category:
Standard Logic Devices
News Release from: Texas Instruments (April 2001-March 2006) | Subject: SN74LVC8T245 and the SN74LVC16T245
Edited by the Electronicstalk Editorial
Team on 19 December 2005
Voltage level translators go both ways
Texas Instruments has expanded its voltage level translation portfolio with the introduction of new 8 and 16bit dual-supply voltage level translators.
Texas Instruments has expanded its voltage level translation portfolio with the introduction of new 8 and 16bit dual-supply voltage level translators The SN74LVC8T245 and the SN74LVC16T245 allow for more design flexibility for translating mixed I/O voltages in a system
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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These devices allow for bidirectional level translation between the 1.8, 2.5, 3.3 and 5.0V nodes and are essential when a lower level voltage output is trying to communicate with a higher voltage input (3.3V output and 5V input, for example).
By using a dual-supply level translator, not only is input compatibility achieved but total system power is also held in check.
The opposite condition, where a higher voltage output is sending signals to a lower voltage input (5V output and 3.3V input, for example), using a dual-supply level-translator provides further I/O compatibility and eliminates the need for high voltage tolerance at the input; thus assisting the board designer for worry-free communication between ICs.
Both the 8bit SN74LVC8T245 and the 16bit SN74LVC16T245 offer several advantages over competing offerings.
Each of them has two supply rails that operate over the full range of 1.65 to 5.5V.
When either supply voltage is switched off, all outputs are placed in the Hi-Z mode.
This eliminates the need for power supply sequencing, ie any supply voltage can be ramped up first.
These translators also have the Ioff feature which allows use in partial power-down applications.
The SN74LVC8T245 is available in the space saving QFN package (3.5 x 5.5mm) making it well suited for use in portable applications and provides excellent thermal, mechanical and reliability performance.
The device has also been released in the Industry-standard SSOP, TSSOP, and TVSOP packages.
Budgetary pricing for the SN74LVC8T245RHLR (QFN) is set at $0.86 in quantities of 1000.
The SN74LVC16T245 is planned for release in the space saving VFBGA package (7 x 4.5mm).
The device is currently released in the Industry-standard SSOP, TSSOP, and TVSOP packages.
Budgetary pricing for the SN74LVC16T245DGVR (TVSOP) is set at $1.65 in quantities of 1000.
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