UM2002
Bidirectional voltage level translator for open-drain and
push-pull applications
UM2002S8
SOP8
UM2002U8
TSSOP8
General Description
The UM2002 is a bidirectional voltage level translator operational from 1.0V to 3.6V (V
ref(A)
) and
1.8V to 5.5V (V
ref(B)
), which allows bidirectional voltage translations between 1.0V and 5V
without the need for a direction pin in open-drain or push-pull applications. Bit widths ranging
from 1-bit or 2-bit are offered for level translation application with transmission speeds < 33 MHz
for an open-drain system with a 50 pF capacitance and a pull-up of 197Ω.
The translators provide excellent ESD protection to lower voltage devices, and at the same time
protect less ESD-resistant devices.
Applications
SPI, MICROWIRE and I
2
C Level
Translation
Low-Voltage ASIC Level Translation
Smart Card Readers
Cell-phone Cradles
Portable POS Systems
Portable Communication Devices
Low-Cost Serial Interfaces
Cell-Phones
GPS
Telecommunications Equipment
Consumer Electronics
Household Appliances
Features
Provides bidirectional voltage translation
with no direction pin
Less than 1.5 ns maximum propagation
delay
Allows voltage level translation between:
1). 1.0V V
ref(A)
and 1.8V, 2.5V, 3.3V or 5V
V
ref(B)
2). 1.2V V
ref(A)
and 1.8V, 2.5V, 3.3V or 5V
V
ref(B)
3). 1.8V V
ref(A)
and 3.3V or 5V V
ref(B)
4). 2.0V V
ref(A)
and 5V V
ref(B)
5). 3.3V V
ref(A)
and 5V V
ref(B)
Low 3.5Ω ON-state connection between
input and output ports provides less signal
distortion
5V tolerant I/O ports to support
mixed-mode signal operation
High-impedance An and Bn pins for
EN = LOW
Lock-up free operation
Flow through pinout for ease of
printed-circuit board trace routing
ESD protection exceeds:
4kV HBM per JESD22-A114
200V MM per JESD22-A115
1000V CDM per JESD22-C101
Packages offered: SOP8, TSSOP8
________________________________________________________________________
http://www.union-ic.com Rev.04 Feb.2014
1/12
UM2002
Pin Configurations
(Top View)
8
7
6
5
Top View
GND
1
8
EN
VREFA
2
7
VREFB
UM2002
S8
XX
1
2
3
4
A1
3
6
B1
A2
4
5
B2
XX: Week Code
UM2002S8 SOP8
(Top View)
1
8
GND
VREFA
A1
A2
1
2
3
4
8
7
6
5
EN
VREFB
B1
B2
2
3
4
2002U8
XX
7
6
5
XX: Week Code
UM2002U8 TSSOP8
Pin Description
Pin Number
1
2
3,4
5,6
7
8
Symbol
GND
VREFA
A1,A2
B1,B2
VREFB
EN
Function
Ground (0V)
Low-voltage side reference supply voltage for An
Low-voltage side; connected to VREFA through a pull-up
resistor
High-voltage side; connected to VREFB through a pull-up
resistor
High-voltage side reference supply voltage for Bn
Switch enable input; connected to VREFB and pulled-up
through a high resistor
Ordering Information
Part Number
UM2002S8
UM2002U8
Packaging Type
SOP8
TSSOP8
Marking Code
UM2002S8
2002U8
Shipping Qty
2500pcs/13Inch
Tape & Reel
3000pcs/13Inch
Tape & Reel
________________________________________________________________________
http://www.union-ic.com Rev.04 Feb.2014
2/12
UM2002
Absolute Maximum Ratings (Note 1)
Over operating free-air temperature range (unless otherwise noted)
Symbol
Parameter
V
ref(A)
Reference Voltage (A)
V
ref(B)
Reference Voltage (B)
V
I
V
I/O
I
ch
I
IK
T
stg
Input Voltage
Voltage on an input/output pin
Channel Current (DC)
Input Clamp Current
Storage Temperature
V
I
＜0V
Value
-0.5 to +6
-0.5 to +6
-0.5(Note 2) to +6
-0.5(Note 2) to +6
+128
-50
-65 to +150
Unit
V
V
V
V
mA
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.
Recommended Operating Conditions
Symbol
V
I/O
V
ref(A)
(Note 3)
V
ref(B)
(Note 3)
V
I(EN)
I
sw(pass)
T
amb
Parameter
Voltage on an input/output pin
Reference Voltage (A)
Reference Voltage (B)
Input Voltage on pin EN
Pass Switch Current
Ambient Temperature
Operating in free-air
-40
Conditions
An, Bn
VREFA
VREFB
Min
0
0
0
0
Max
5.5
5.4
5.5
5.5
64
+85
Unit
V
V
V
V
mA
°
C
Note 3: V
ref(A)
≤ V
ref(B)
−1 V for best results in level shifting applications.
________________________________________________________________________
http://www.union-ic.com Rev.04 Feb.2014
3/12
UM2002
Electrical Characteristics
T
amb
= −40 °C to +85 °C, unless otherwise specified.
Symbol
V
IK
I
IH
C
i(EN)
Parameter
Input Clamping
Voltage
HIGH-level
Input Current
Input
Capacitance on
pin EN
Off-state
input/output
capacitance
On-state
input/output
capacitance
Conditions
I
I
= −18mA;
V
I(EN)
= 0V
V
I
= 5V;
V
I(EN)
= 0V
V
I
= 0V or 3V
12
Min
Typ
(Note 4)
Max
-1.2
5
Unit
V
uA
pF
An, Bn;
C
io(off)
V
O
= 0V or 3V ;
10
12
pF
V
I(EN)
= 0V
An, Bn;
12.5
C
io(on)
V
O
= 0V or 3V ;
8
pF
(Note 5)
V
I(EN)
= 3V
An, Bn;
V
I
= 0V; I
O
= 64mA;
1
2.5
5.0
ON-state
V
I(EN)
= 4.5V(Note 7)
R
on
resistance
Ω
An, Bn;
(Note 6)
V
I
= 2.4V; I
O
= 15mA;
4.5
7.5
V
I(EN)
= 4.5V
Note 4: All typical values are at T
amb
= 25°
C.
Note 5: Not production tested, maximum value based on characterization data of typical parts.
Note 6: Measured by the voltage drop between the An and Bn terminals at the indicated current
through the switch. ON-state resistance is determined by the lowest voltage of the two
terminals.
Note 7: Guaranteed by design.
________________________________________________________________________
http://www.union-ic.com Rev.04 Feb.2014
4/12
UM2002
Switching Characteristics (translating down)
Over recommended operating free-air temperature range(unless otherwise noted). Values
guaranteed by design.
C
L
=50pF
C
L
=30pF
C
L
=15pF
Test
Symbol
Parameter
Unit
Conditions
Min Max Min Max Min Max
V
I(EN)
= 3.3V; V
IH
= 3.3V; V
IL
= 0V; V
M
=1.15V(see Figure 1).
t
PLH
LOW to
HIGH
propagation
delay
HIGH to
LOW
propagation
delay
LOW to
HIGH
propagation
delay
HIGH to
LOW
propagation
delay
0
from (input)
Bn to
(output) An.
0
3.5
0
3.0
0
2.3
ns
3.5
0
2.7
0
2.2
ns
t
PHL
V
I(EN)
=2.5V; V
IH
= 2.5V; V
IL
= 0V; V
M
= 0.75V (see Figure 1).
t
PLH
0
from (input)
Bn to
(output) An.
0
4.0
0
3.0
0
2.3
ns
3.5
0
2.7
0
2.2
ns
t
PHL
Switching Characteristics (translating up)
Over recommended operating free-air temperature range(unless otherwise noted). Values
guaranteed by design.
C
L
=50pF
C
L
=30pF
C
L
=15pF
Test
Symbol
Parameter
Unit
Conditions
Min
Max Min
Max Min
Max
V
I(EN)
= 3.3V; V
IH
= 2.3V; V
IL
= 0V; V
TT
= 3.3V; V
M
= 1.15V; R
L
= 300Ω(see Figure 1).
t
PLH
LOW to
HIGH
propagation
delay
HIGH to
LOW
propagation
delay
LOW to
HIGH
propagation
delay
HIGH to
LOW
propagation
delay
0
from (input)
An to
(output) Bn.
0
4.35
0
3.25
0
2.4
ns
3.35
0
2.5
0
2.0
ns
t
PHL
V
I(EN)
=2.5V; V
IH
= 1.5V; V
IL
= 0V; V
TT
= 2.5V; V
M
= 0.75V; R
L
= 300Ω (see Figure 1).
t
PLH
0
from (input)
An to
(output) Bn.
0
4.5
0
3.5
0
2.5
ns
3.35
0
2.5
0
2.0
ns
t
PHL
________________________________________________________________________
http://www.union-ic.com Rev.04 Feb.2014
5/12
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