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PDF UM3211P Data sheet ( Hoja de datos )
| Número de pieza | UM3211P | |
| Descripción | Bidirectional voltage level translator | |
| Fabricantes | Union Semiconductor | |
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UM3211P
Bidirectional voltage level translator for open-drain and
General Description
push-pull applications
UM3211P SOT363
The UM3211P is a bidirectional voltage level translator operational from 1.0V to 3.6V (VCCA) and
1.8V to 5.5V (VCCB), which allows bidirectional voltage translations between 1.0V and 5V
without the need for a direction pin in open-drain or push-pull applications. The UM3211P is a
1-bit level translator. Its transmission speeds are below 33MHz for an open-drain system with a
50pF capacitance and a pull-up resistor of 197Ω.
The low ON-state resistance (Ron) of the switch allows connections to be made with minimal
propagation delay. When EN is high, the translator switch is ON, and the A I/O is connected to
the B I/O, allowing bidirectional data flow between ports. When EN is low, the translator switch
is off, and a high-impedance state exists between ports.
The translators provide excellent ESD protection to lower voltage devices, and at the same time
protect less ESD-resistant devices.
Applications
Features
SPI, MICROWIRE, and I2C Level Provides bidirectional voltage translation
Translation
with no direction pin
Low-Voltage ASIC Level Translation Less than 1.5 ns maximum propagation
Smart Card Readers
delay
Cell-phone Cradles
Low 3.5Ω ON-state connection between
Portable POS Systems
input and output ports provides less signal
Portable Communication Devices
distortion
Low-Cost Serial Interfaces
5V tolerant I/O ports to support
Cell-Phones
mixed-mode signal operation
GPS
High-impedance A and B pins for
Telecommunications Equipment
EN = LOW
Consumer Electronics
Latch up free operation
Household Appliances
Flow through pinout for ease of
printed-circuit board trace routing
ESD protection exceeds:
4kV HBM per JESD22-A114
Package offered: SOT363
Pin Configurations
Top View
(Top View)
M: Month Code
UM3211P SOT363
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http://www.union-ic.com Rev.01 Dec.2013
1/10
1 page  
UM3211P
Applications Information
Detail Description
The UM3211P is a bidirectional voltage level translator operational from 1.0V to 3.6V (VCCA) and
1.8V to 5.5V (VCCB), which allows bidirectional voltage translations between 1.0V and 5V
without the need for a direction pin in open-drain or push-pull applications.
When the A or B port is LOW, the clamp is in the ON-state and a low resistance connection exists
between the A and B ports. The low ON-state resistance (Ron) of the switch allows connections to
be made with minimal propagation delay. Assuming the higher voltage is on the B port when the
B port is HIGH, the voltage on the A port is limited to the voltage set by VCCA. When the A port is
HIGH, the B port is pulled to the drain pull-up supply voltage (Vpu(D)) by the pull-up resistors.
This functionality allows a seamless translation between higher and lower voltages selected by the
user without the need for directional control.
When EN is HIGH, the translator switch is on, and the A I/O is connected to the B I/O, allowing
bidirectional data flow between ports. When EN is LOW, the translator switch is off, and a
high-impedance state exists between ports. The EN input circuit is designed to be supplied by
VCCB. To ensure the high-impedance state during power-up or power-down, EN must be LOW.
All channels have the same electrical characteristics and there is minimal deviation from one
output to another in voltage or propagation delay. This is a benefit over discrete transistor voltage
translation solutions, since the fabrication of the switch is symmetrical.
________________________________________________________________________
http://www.union-ic.com Rev.01 Dec.2013
5/10
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet UM3211P.PDF ] | |
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