深圳市科瑞芯电子有限公司

ETA4554Q2O-4位双向电压电平转换器开路漏极和推挽应用

DESCRIPTION
ETA4554, four-bit non-inverting translator, is a bidirectional voltagelevel
translator and can be used to establish digital switching
compatibility between mixed-voltage systems. It uses four separate
configurable power-supply rails, with the A ports supporting operating
voltages from 1.65V to 5.5V while it tracks the VCCA supply, and the B
ports supporting operating voltages from 2.3V to 5.5V while it tracks
the VCCB supply. This allows the support of both lower and higher logic
signal levels while providing bidirectional translation capabilities
between any of the 1.8V, 2.5V, 3.3V, and 5V voltage nodes.
ETA4554 provide enable control pin, OE. When the output-enable
(OE) input is low, all I/Os are placed in the high-impedance state,
which significantly reduces the power-supply quiescent current
consumption. OE has an internal pull-down current source, as long as
VCCA is powered.
To ensure the high-impedance state during power up or power
down, OE should be tied to GND through a pull-down resistor, the
minimum value of the resistor is determined by the current-sourcing
capability of the driver.

FEATURES
No Direction-Control Signal Needed
Data Rates
24Mbps (Push-Pull)
2Mbps (Open-Drain)
1.65V to 5.5V on A Ports and 2.3V to 5.5V on B
Ports (VCCA ≤ VCCB)
VCC Isolation: If Either VCC is at GND, Both Ports are
in the High-Impedance State
No Power-Supply Sequencing Required: Either VCCA
or VCCB can be Ramped First
IOFF: Supports Partial-Power-Down Mode Operation
Available in QFN1.7x2.0-12, QFN2x2-14, QFN3x3-
16, QFN3.5x3.5-14 and TSSOP-14 Packages

APPLICATIONS
I2C/SMBus
UART
GPIO