Document
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
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UM3211P
Pin Description
Pin Number
1 2 3
4 5 6
Symbol
A VCCA GND
EN VCCB
B
Function
Low-voltage side; connected to VCCA through a pull-up resistor Low-voltage side reference supply voltage for A
Ground (0V)
Switch enable input; connected to VCCB and pulled-up through a high resistor High-voltage side reference supply voltage for B High-voltage side; connected to VCCB through a pull-up resistor
Ordering Information
Part Number UM3211P
Packaging Type SOT363
Marking Code UA3
Shipping Qty
3000pcs/7Inch Tape & Reel
Absolute Maximum Ratings (Note 1)
Over operating free-air temperature range (unless otherwise noted)
Symbol
Parameter
VCCA Reference Voltage (A)
VCCB Reference Voltage (B)
VI Input Voltage
Value -0.5 to +6 -0.5 to +6
-0.5(Note 2) to +6
Unit V V
V
VI/O Voltage on an input/output pin
-0.5(Note 2) to +6 V
Ich Channel Current (DC)
+128
mA
IIK Input Clamp Current Tstg Storage Temperature
VI<0V
-50 -65 to +150
mA °C
Note 1: Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
Note 2: The input and input/output negative voltage ratings may be exceeded if the input and input/output clamp current ratings are observed.
________________________________________________________________________
http://www.union-ic.com Rev.01 Dec.2013
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UM3211P
Recommended Operating Conditions
Symbol VI/O
Parameter Voltage on an input/output pin
Conditions A, B
VCCA (Note 3)
Reference Voltage (A)
VCCA
VCCB (Note 3)
Reference Voltage (B)
VCCB
VI(EN)
Input Voltage on pin EN
Isw(pass)
Pass Switch Current
Tamb
Ambient Temperature
Operating in free-air
Note 3: VCCA ≤ VCCB −1 V for best results in level shifting applications.
Electrical Characteristics
Min 0 0 0 0
-40
Max Unit 5.5 V 5.5 V
5.5 V 5.5 V 64 mA +85 °C
Tamb = −40 °C to +85 °C, unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ (Note 4)
Max Unit
VIK
Input Clamping Voltage
IIH
HIGH-level Input Current
Input
II = −18mA; VI(EN) = 0V
VI= 5V; VI(EN) = 0V
-1.2 V 5 uA
Ci(EN)
Capacitance on
VI= 0V or 3V
12
pF
pin EN
Off-state
A, B;
Cio(off) Cio(on)
input/output capacitance
On-state input/output capacitance
VO= 0V or 3V ; VI(EN) = 0V
A, B; VO= 0V or 3V ;
VI(EN) = 3V
10 12 pF
8
12.5 (Note 5)
pF
A, B;
Ron
ON-state resistance (Note 6)
VI = 0V; IO = 64mA; VI(EN) = 4.5V(Note 7)
A, B; VI = 2.4V; IO = 15mA;
1
2.5 4.5
5.0 7.5
VI(EN) = 4.5V
Note 4: All typical values are at Tamb = 25°C.
Note 5: Not production tested, maximum value based on characterization data of typical parts.
Ω
Note 6: Measured by the voltage drop between the A and B termi.