4-BITS BIDIRECTIONAL MULTI-VOLTAGE LEVEL TRANSLATOR FOR OPEN-DRAIN AND PUSH-PULL  APPLICATION

DESCRIPTION

UTC ULSF0204/D family consists of bidirectional voltage level

translators that operate from 0.8Vto 4.5V (VREF_A) and1.8V to 5.5V

(VREF_B). This range allows for bidirectional voltage translations

between 0.8V and 5.0V without the need for a direction terminal in

open-drain or push-pull applications. The UTC ULSF0204/D family

supports level translation applications with transmission speeds

greater than 100MHz for open-drain systems that utilize a

15-pFcapacitance and 165Ω pull-up resistor.

When the An or Bn port is LOW, the switch is in the ON-state

and a low resistance connection exists between the An and Bn

ports. The low Ron of the switch allows connections to be made

with minimal propagation delay and signal distortion. The voltage

on the A or B side will be limited to VREF_A and can be pulled up to

any level between VREF_A and 5V. This functionality allows a

seamless translation between higher and lower voltages selected

by the user without the need for directional control.

FEATURES

* Provides bidirectional voltage translation with no direction pin

* Supports up to 100-MHz up translation and greater than 100MHz

down translation at ≤ 30pF capacitor load and up to 40MHz

up/down translation at 50pF capacitor load

* Supports IOFF, partial power down mode

* Allow bidirectional voltage level translation between

– 0.8V↔1.8/2.5/3.3/5V

– 1.2V↔1.8/2.5/3.3/5V

– 1.8V↔2.5/3.3/5V

– 2.5V↔3.3/5V