nlsx4378 ON Semiconductor, nlsx4378 Datasheet - Page 8

• Manufacturer Part Number: nlsx4378
• Description: 4-bit 20 Mb/s Dual-supply Level 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
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
PSKEW
ORDERING INFORMATION
CC
NLSX4378FCT1G
NLSX4378BFCT1G
The
The NLSX4378 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
NLSX4378 auto sense translator provides
L
translation shifts input signals with a logic level
R
) and fall (t
Device
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
(Backside Laminate Coating)
PD
), skew
http://onsemi.com
(Pb−Free)
(Pb−Free)
mBump12
mBump12
Package
L
.
8
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
greater than, less than or equal to V
the power supplies will not damage the device during the
power up operation.
capacitors should be used on the V
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 NLSX4378 has an Enable pin (EN) that provides
During normal operation, supply voltage V
For optimal performance, 0.01 mF to 0.1 mF decoupling
L
3000 / Tape & Reel
3000 / Tape & Reel
supply and has Overvoltage
Shipping
CC
and I/O V
L
CC
and V
†
. The sequencing of
CC
L
power supply
pins to a high
L
can be