12/5/2003 - Ideal for interfacing devices operating at different voltage nodes, Texas Instruments (TI) (NYSE: TXN) announced the addition of four new dual-supply level translation transceivers to its portfolio of translation products, the SN74LVC1T45, SN74LVC2T45, SN74AVC8T245, and the SN74AVC20T245. Useful in portable consumer, networking, datacom, and computing applications, these devices allow flexible bi-directional level translation between 1.5V, 1.8V, 2.5V, 3.3V, and 5V voltage nodes.
Mismatched I/O voltages between microprocessors and peripheral devices continue to occur as microprocessor I/O voltages migrate to lower nodes and peripherals maintain higher voltage nodes. TI's new dual-supply level translation devices allow for communication between two devices that have such dissimilar interface voltages, while maintaining signal integrity and speed. These devices also offer full configurability with each rail being configurable from 1.4V to 3.6V in the AVC technology and 1.65V to 5.5V in the LVC technology.
The AVC translators feature 12mA current drive and fast propagation delays of 3.5ns (typ) when translating from 1.8V to 3.3V. Translators in the LVC technology have a max drive strength of 32mA and propagation delays of 4ns (typ) when translating from 3.3V to 5V.
These devices add further bit width flexibility to TI´s Dual-Supply Level Translation portfolio that now provides options from a single bit to 32 bits. The new 6-pin LVC1T45 and 8-pin LVC2T45 transceivers simplify routing by allowing designers to place a single or a dual translator on the board rather than routing through a higher bit-width device. These transceivers are extremely useful for level shifting control signals from general purpose I/O´s.
LCD applications commonly require 20-bits, and TI offers an integrated solution for this product space. TI's new AVC20T245 is ideal in situations where 16 data bits and 4 control bits are needing translation. Today this is commonly implemented using two 16-bit devices, resulting in 12 unused pins. For applications where 24 or 28 bits are necessary, the new AVC8T245 can be combined with TI's existing 16-bit AVC translators or the new AVC20T245.
Pricing, Support, and Availability
Initial budgetary pricing for these devices range from $0.40 to $2.50 per 1KU. All four devices are currently sampling along with other TI Dual-Supply Level Translation devices. The chart below details packaging options and budgetary pricing per 1K reel.
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