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UM3211P PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 UM3211P
기능 Bidirectional voltage level translator
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UM3211P 데이터시트, 핀배열, 회로
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 197.
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 3.5ON-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
________________________________________________________________________
http://www.union-ic.com Rev.01 Dec.2013
1/10




UM3211P pdf, 반도체, 판매, 대치품
UM3211P
Switching Characteristics (translating down)
Over recommended operating free-air temperature range(unless otherwise noted). Values
guaranteed by design.
Symbol
Parameter
Test
Conditions
CL=50pF
Min Max
CL=30pF
Min Max
CL=15pF
Min Max
Unit
VI(EN) = 3.3V; VIH = 3.3V; VIL = 0V; VM =1.15V(see Figure 1).
LOW to
tPLH
tPHL
HIGH
propagation
delay
HIGH to
LOW
propagation
from (input)
B to (output)
A
0
0
3.5 0
3.5 0
2.7
3.0
0
0
2.2 ns
2.3 ns
delay
VI(EN) =2.5V; VIH = 2.5V; VIL = 0V; VM = 0.75V (see Figure 1).
LOW to
tPLH
tPHL
HIGH
propagation
delay
HIGH to
LOW
propagation
from (input)
B to (output)
A
0
0
3.5 0
4.0 0
delay
2.7 0
3.0 0
2.2 ns
2.3 ns
Switching Characteristics (translating up)
Over recommended operating free-air temperature range(unless otherwise noted). Values
guaranteed by design.
Symbol
Parameter
Test
Conditions
CL=50pF
Min Max
CL=30pF
Min Max
CL=15pF
Min Max
Unit
VI(EN) = 3.3V; VIH = 2.3V; VIL = 0V; VTT = 3.3V; VM = 1.15V; RL = 300(see Figure 1).
LOW to
tPLH
tPHL
HIGH
propagation
delay
HIGH to
LOW
propagation
from (input)
A to (output)
B.
0
0
3.35
4.35
0
0
2.5 0
3.25 0
2.0
2.4
delay
ns
ns
VI(EN) =2.5V; VIH = 1.5V; VIL = 0V; VTT = 2.5V; VM = 0.75V; RL = 300(see Figure 1).
LOW to
tPLH
tPHL
HIGH
propagation
delay
HIGH to
LOW
propagation
from (input)
A to (output)
B.
0
0
3.35
4.5
0
0
2.5 0
3.5 0
2.0
2.5
delay
ns
ns
________________________________________________________________________
http://www.union-ic.com Rev.01 Dec.2013
4/10

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UM3211P 전자부품, 판매, 대치품
UM3211P
Bidirectional translation
For the bidirectional clamping configuration (higher voltage to lower voltage or lower voltage to
higher voltage), the EN input must be connected to VCCB and both pins pulled to HIGH side
Vpu(D) through a pull-up resistor (typically 200k). This allows VCCB to regulate the EN input. A
filter capacitor on VCCB is recommended. The master output driver can be totem pole or
open-drain (pull-up resistors may be required) and the slave device output can be totem pole or
open-drain (pull-up resistors are required to pull the B output to Vpu(D)). However, if either output
is totem pole, data must be unidirectional or the outputs must be 3-stateable and be controlled by
some direction-control mechanism to prevent HIGH-to-LOW contentions in either direction. If
both outputs are open-drain, no direction control is needed.
The reference supply voltage (VCCA) is connected to the processor core power supply voltage.
When VCCB is connected through a 200kresistor to a 3.3V to 5.5V Vpu(D) power supply, and
VCCA is set between 1.0V and (Vpu(D) 1V), the output of A has a maximum output voltage equal
to VCCA, and the output of B has a maximum output voltage equal to Vpu(D).
Application operating conditions
Refer to Figure 2
Symbol
Parameter
Conditions
VCCB
VI(EN)
Reference Voltage (B)
Input Voltage on pin
EN
VCCA
Isw(pass)
Iref
Reference Voltage (A)
Pass Switch Current
Reference Current
Transistor
Operating
Tamb Ambient Temperature
in
free-air
Note 8: All typical values are at Tamb = 25 °C.
Sizing pull-up resistor
Min
VCCA + 0.6
VCCA + 0.6
0
-40
Typ
(Note 8)
2.1
2.1
1.5
14
5
Max
5
5
4.4
+85
Unit
V
V
V
mA
μA
°C
The pull-up resistor value needs to limit the current through the pass transistor when it is in the
ON state to about 15mA. This ensures a pass voltage of 260mV to 350mV. If the current through
the pass transistor is higher than 15mA, the pass voltage also is higher in the ON state. To set the
current through each pass transistor at 15mA, the pull-up resistor value is calculated as:
RPU
V
pu
(D) 0.35V
0.015 A
The table below summarizes resistor reference voltages and currents at 15mA, 10mA, and 3mA.
The resistor values shown in the +10 % column or a larger value should be used to ensure that the
pass voltage of the transistor would be 350 mV or less. The external driver must be able to sink
the total current from the resistors on both sides of the UM3211P device at 0.175V, although the
15mA only applies to current flowing through the UM3211P device.
________________________________________________________________________
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부품번호상세설명 및 기능제조사
UM3211P

Bidirectional voltage level translator

Union Semiconductor
Union Semiconductor

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