UNISONIC TECHNOLOGIES CO., LTD
ULSF0204/D
Preliminary CMOS IC
1 of 11
Copyright © 2021 Unisonic Technologies Co., Ltd
QW-R125-109.b
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 (V
REF_A
) and1.8V to 5.5V
(V
REF_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 V
REF_A
and can be pulled up to
any level between V
REF_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 I
OFF
, 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
– 3.3V↔5V
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