1. General description
The NXU0304 is a 4-bit, dual-supply level translating
buffer with 3-state outputs. It features four data inputs
(An and B4), four data outputs (YBn and YA4) and an
output enable input (OE).
Both VCCA and VCCB can be supplied at any voltage
between 0.9 V and 5.5 V making the device suitable
for translating between any of the voltage nodes (1.2 V,
1.5 V, 1.8 V, 2.5 V, 3.3 V and 5.0 V).
This device facilitates asynchronous communication
between data buses. Transmit data with a fixed
direction (unidirectionally) from the A bus to the B bus
on three channels and from the B bus to the A bus for
on one channel. The OE pin can be referenced to VCCA
and VCCB domain and when OE pin is set LOW the
outputs are disabled and enter a high-impedance OFFstate
which isolates the buses. The OE pin can be left
floating or externally pulled down to ground to ensure
the high-impedance state of the outputs during power
up or power down.
This device ensures low static and dynamic power
consumption across the entire supply range and is
fully specified for partial power down applications using
IOFF. The IOFF circuitry prevents potentially damaging
backflow current through the device when it is powered
down or if one of the power supplies is disconnected
(floating).
No power supply sequencing is required and output
glitches during power supply transitions are prevented.
As a result, glitches will not appear on the outputs for
supply transitions during power-up/down.
2. Features and benefits
• Wide supply voltage range:
• VCCA: 0.9 V to 5.5 V
• VCCB: 0.9 V to 5.5 V
• Low power consumption for supply voltage range
1.1 V to 5.5 V
• 3 μA (Tamb = 25 °C)
• 5 μA (Tamb = -40 °C to +125 °C)
• Schmitt-trigger inputs with integrated static high
ohmic pull-down resistor on the input
• Maximum data rates:
• 250 Mbps (≥ 1.8 V to 5 V translation)
• High output drive 12 mA at 5 V
• Output enable (OE) allows connection to VCCA or
VCCB domain
• Suspend mode when either one of the supply
voltages is below 100 mV or disconnected (floating)
• Low noise overshoot and undershoot
<10% of VCCO
• IOFF circuitry provides partial power-down mode
operation
• Latch-up performance exceeds 100 mA per
JESD78D Class II
• Complies with JEDEC standard:
• JESD8-12 (0.9 V to 1.3 V)
• JESD8-11 (1.4 V to 1.6 V)
• JESD8-7 (1.65 V to 1.95 V)
• JESD8-5 (2.3 V to 2.7 V)
• JESD8C (2.7 V to 3.6 V)
• JESD12-6 (4.5 V to 5.5 V)
• ESD protection:
• HBM: ANSI/ESDA/JEDEC JS-001 class 2
exceeds 2500 V
• CDM: ANSI/ESDA/JEDEC JS-002 class C3
exceeds 1500 V
• Specified from -40 °C to +85 °C and -40 °C to
+125 °C
• Similar functions: NXU0104 and NXU0204
3. Applications
• General purpose I/O level translation
• Noisy environments or slow input signals
• Supports push-pull voltage translation as UART,
SPI and JTAG protocols
• Consumer