nlsx3373 ON Semiconductor, nlsx3373 Datasheet - Page 9

• Manufacturer Part Number: nlsx3373
• Description: 2-bit Configurable Dual-supply Bidirectional Auto Sensing Translator
• Manufacturer: ON Semiconductor

Level Translator Architecture
bi-directional voltage level shifting to transfer data in
multiple supply voltage systems. This device has two
supply voltages, V
the input and output sides of the translator. When used to
transfer data from the V
referenced to the V
with a logic level matched to V
V
compatible to V
that independently determine the direction of the data flow
without requiring a directional pin. The one-shot circuits
are used to detect the rising or falling input signals. In
addition, the one shots decrease the rise and fall time of the
output signal for high-to-low and low-to-high transitions.
The magnitude of the pullup resistors can be reduced by
connecting external resistors in parallel to the internal
10 kW resistors.
Input Driver Requirements
drain outputs depend on the magnitude of the pull-up
resistors. In addition, the propagation times (t
(t
of the device that is connected to the translator. The timing
PSKEW
CC
The
The NLSX3373 consists of two bi-directional channels
Each input/output channel has an internal 10 kW pull.
The rise (t
to V
) and maximum data rate depend on the impedance
NLSX3373 auto sense translator provides
L
translation shifts input signals with a logic level
R
) and fall (t
CC
L
L
to an output signal matched to V
and V
supply are translated to output signals
L
F
CC
) timing parameters of the open
to the V
, which set the logic levels on
CC
. In a similar manner, the
CC
ports, input signals
APPLICATIONS INFORMATION
PD
), skew
http://onsemi.com
L
.
NLSX3373
9
parameters listed in the data sheet assume that the output
impedance of the drivers connected to the translator is less
than 50 kW.
Enable Input (EN)
tri-state operation at the I/O pins. Driving the Enable pin
to a low logic level minimizes the power consumption of
the device and drives the I/O V
impedance state. Normal translation operation occurs
when the EN pin is equal to a logic high signal. The EN pin
is referenced to the V
Tolerant (OVT) protection.
Power Supply Guidelines
less than or equal to V
supplies will not damage the device during the power up
operation. In addition, the I/O V
the high impedance state if either supply voltage is equal
to 0 V. For optimal performance, 0.01 mF to 0.1 mF
decoupling capacitors should be used on the V
power supply pins. Ceramic capacitors are a good design
choice to filter and bypass any noise signals on the voltage
lines to the ground plane of the PCB. The noise immunity
will be maximized by placing the capacitors as close as
possible to the supply and ground pins, along with
minimizing the PCB connection traces.
The NLSX3373 has an Enable pin (EN) that provides
During normal operation, supply voltage V
CC
L
. The sequencing of the power
supply and has Overvoltage
CC
CC
and I/O V
and I/O V
L
pins to a high
L
L
L
pins are in
should be
and V
CC