UM3308
8-Bit Bidirectional Voltage-Level Translator with Auto Direction
sensing and ±
15kV ESD Protection
UM3308
CSP20 2.7×
2.4
General Description
UM3308 is 8-channel bidirectional voltage level translator with auto direction sensing and ±
15kV
ESD protection. This 8-channel noninverting translator uses two separate configurable
power-supply rails. The A port is designed to track V
CCA
. V
CCA
accepts any supply voltage from
1.2V to 3.6V. The B port is designed to track V
CCB
. V
CCB
accepts any supply voltage from 1.65V
to 5.5V. This allows for universal low-voltage bidirectional translation between any of the 1.2V,
1.5V, 1.8V, 2.5V, 3.3V, and 5V voltage nodes. Both I/O ports are auto-sensing; thus, no direction
pin is required, making it ideal for data transfer between low-voltage ASICs/PLDs and higher
voltage systems.
The UM3308 operates at a guaranteed data rate of 20Mbps over the entire specified operating
voltage range. Within specific voltage domains, higher data rates are up to 100Mbps.
When the output-enable (OE) input is low, all outputs are placed in the high-impedance state. The
UM3308 is designed so that the OE input circuit is supplied by V
CCA
.
To ensure the high-impedance state during power up or power down, OE should be tied to GND
through a pull down resistor; the minimum value of the resistor is determined by the
current-sourcing capability of the driver.
The UM3308 is 8-channel level translator available in CSP20 2.7× bump package.
2.4
Applications
Low-Voltage ASIC Level Translation
Cell-Phone Cradles
Portable POS Systems
Portable Communication Devices
Low-Cost Serial Interfaces
Cell-Phones
GPS
Telecommunications Equipment
Features
1.2V to 3.6V on A Port and 1.65V to 5.5V
on B Port (V
CCA
≤V
CCB
)
V
CC
Isolation Feature – If Either V
CC
Input
is at GND, All Outputs are in the
High-Impedance State
OE Input Circuit Referenced to V
CCA
Low Power Consumption
Latch-Up Performance Exceeds 100mA
±
15kV ESD Protection on B Ports
Pin Configurations
(Bottom View)
Top View
(Top View)
XXX:
Date Code
UM3308
CSP20 2.7×
2.4
________________________________________________________________________
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1/12
UM3308
Terminal Assignments
1
D
C
B
A
V
CCB
B1
A1
V
CCA
2
B2
B3
A3
A2
3
B4
B5
A5
A4
4
B6
B7
A7
A6
5
B8
GND
OE
A8
Pin Description
Pin Name
A1
V
CCA
A2
A3
A4
A5
A6
A7
A8
OE
GND
B8
B7
B6
B5
B4
B3
B2
V
CCB
B1
Function
Input/Output 1. Referenced to V
CCA
A-Port supply voltage. 1.1V≤V
CCA
≤3.6V and V
CCA
≤V
CCB
Input/Output 2. Referenced to V
CCA
Input/Output 3. Referenced to V
CCA
Input/Output 4. Referenced to V
CCA
Input/Output 5. Referenced to V
CCA
Input/Output 6. Referenced to V
CCA
Input/Output 7. Referenced to V
CCA
Input/Output 8. Referenced to V
CCA
3-state output enable. Pull OE low to place all outputs in 3-state mode.
Referenced to V
CCA
Ground
Input/Output 8. Referenced to V
CCB
Input/Output 7. Referenced to V
CCB
Input/Output 6. Referenced to V
CCB
Input/Output 5. Referenced to V
CCB
Input/Output 4. Referenced to V
CCB
Input/Output 3. Referenced to V
CCB
Input/Output 2. Referenced to V
CCB
B-Port supply voltage. 1.65V≤V
CCB
≤5.5V
Input/Output 1. Referenced to V
CCB
Ordering Information
Part Number
UM3308
Packaging Type
CSP20 2.7×
2.4
Marking Code
YE08
Shipping Qty
2500pcs/7Inch
Tape & Reel
________________________________________________________________________
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UM3308
Absolute Maximum Ratings (Note 1)
Over operating free-air temperature range (unless otherwise noted)
Symbol
V
CCA
V
CCB
V
I
V
O
Parameter
Supply Voltage Range
Supply Voltage Range
Input Voltage Range (Note 2)
Voltage Range applied to any
output in the high-impedance or
power-off state (Note 2)
Voltage Range applied to any
output in the high or low state
(Note 2,3)
Input Clamp Current
Output Clamp Current
Continuous Output Current
Continuous Current through V
CCA
, V
CCB
, or GND
θ
JA
T
OP
Package Thermal Impedance
Operating Temperature Range
A ports
B ports
A ports
B ports
A ports
B ports
V
I
＜0
V
O
＜0
Value
-0.5 to +4.5
-0.5 to +6.5
-0.5 to +4.5
-0.5 to +6.5
-0.5 to +4.5
V
-0.5 to +6.5
-0.5 to ( V
CCA
+0.5)
-0.5 to ( V
CCB
+0.5)
-50
-50
±
50
±
100
78
-40 to +85
V
mA
mA
mA
mA
°
C/W
°
C
Unit
V
V
V
V
O
I
IK
I
OK
I
O
T
STG
Storage Temperature Range
-65 to +150
°
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 output negative-voltage ratings may be exceeded if the input and output
current ratings are observed.
Note 3: The value of V
CCA
and V
CCB
are provided in the recommended operating conditions table.
Recommended Operating Conditions (Note 1, 2)
Symbol
V
CCA
V
CCB
V
IH
V
IL
Δt/ΔV
Parameter
Supply Voltage
High Level Input
Voltage
Low Level Input
Voltage
Input Transition
Rise or Fall Time
Data Inputs
OE
Data Inputs
OE
A-Port Inputs
B-Port Inputs
1.2V to 3.6V
1.2V to 3.6V
1.2V to 5.5V
1.2V to 3.6V
1.2V to 3.6V
1.2V to 3.6V
1.65V to 5.5V
1.65V to 5.5V
1.65V to 5.5V
1.65V to 5.5V
1.65V to 5.5V
1.65V to 3.6V
4.5V to 5.5V
V
CCA
V
CCB
Min
Max
1.2
3.6
1.65
5.5
V
CCI
×
0.65(Note3) V
CCI
V
CCA
×
0.65
5.5
0
V
CCI
×
0.35
0
V
CCA
×
0.35
40
40
30
Unit
V
V
V
V
V
V
ns/V
Note 1: The A and B sides of an unused data I/O pair must be held in the same state, i.e., both at
V
CCI
or both at GND.
Note 2: V
CCA
must be less than or equal to V
CCB
and must not exceed 3.6 V.
Note 3: V
CCI
is the supply voltage associated with the input port.
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UM3308
Electrical Characteristics
(Note 1, 2)
Over recommended operating free-air temperature range (unless otherwise noted)
Parameter
V
OHA
V
OLA
V
OHB
V
OLB
OE
A Port
B Port
A or B Port
I
CCA
Test Conditions
I
OH
=-20μA
I
OL
=20μA
I
OH
=-20μA
I
OL
=20μA
1.2V to 3.6V
0V
0V to 3.6V
1.2V to 3.6V
1.2V
1.4V to 3.6V
3.6V
0V
1.2V
1.4V to 3.6V
3.6V
0V
1.2V
1.4V to 3.6V
1.2V
1.4V to 3.6V
1.2V
1.4V to 3.6V
1.2V to 3.6V
1.2V to 3.6V
V
CCA
1.2V
1.4V to 3.6V
1.2V
1.4V to 3.6V
1.65V to 5.5V
1.65V to 5.5V
1.65V to 5.5V
0V to 5.5V
0V
1.65V to 5.5V
1.65V to 5.5V
1.65V to 5.5V
0V
5.5V
1.65V to 5.5V
1.65V to 5.5V
0V
5.5V
1.65V to 5.5V
1.65V to 5.5V
1.65V to 5.5V
1.65V to 5.5V
1.65V to 5.5V
1.65V to 5.5V
1.65V to 5.5V
1.65V to 5.5V
5
5
8
3.3
5
5.5
6.5
10
pF
pF
0.05
5
μA
V
CCB
T
A
=25℃
-40℃ to 85℃
Unit
Typ Max Min
Max
1.1
V
V
CCA
-0.4
0.9
V
0.4
V
CCB
-0.4
V
0.4
V
±
1
±
2 μA
±
1
±
2
μA
±
1
±
2
±
1
±
2 μA
0.06
5
μA
2
-2
3.4
5
μA
-2
2
3.5
10
μA
μA
I
I
I
off
I
OZ
OE=GND
V
I
=V
CCI
or GND
I
O
=0
I
CCB
V
I
=V
CCI
or GND
I
O
=0
I
CCA
+I
CCB
V
I
=V
CCI
or GND
I
O
=0
V
I
=V
CCI
or GND
I
O
=0, OE=GND
V
I
=V
CCI
or GND
I
O
=0, OE=GND
I
CCZA
I
CCZB
C
i
C
iO
OE
A Port
B Port
Note 1: V
CCI
is the supply voltage associated with the input port.
Note 2: V
CCO
is the supply voltage associated with the output port.
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UM3308
Switching Characteristics
T
A
=+25° V
CCA
= 1.2V
C,
Parameter
t
pd
t
en
t
dis
t
rA,
t
fA
t
rB,
t
fB
t
SK(O)
Max data
rate
To
(Output)
B
A
A
OE
B
A
OE
B
A port rise and fall
time
B port rise and fall
time
Channel-to-channel
From
(Input)
A
B
V
CCB
=1.8V V
CCB
=2.5V V
CCB
=3.3V
Typ
Typ
Typ
7
6
5.3
7.5
6.5
6
1
1
1
1
1
1
18
16
14
19
17
15
5
2.5
0.5
20
5
1.5
0.5
20
5
1.2
0.5
20
V
CCB
=5V
Typ
5.5
6
1
1
14
15
5
1
1.5
20
Unit
ns
μs
ns
ns
ns
ns
Mbps
Switching Characteristics
Over recommended operating free-air temperature range, V
CCA
=1.5V±
0.1V (unless otherwise
noted)
From
(Input)
A
B
To
(Output)
V
CCB
=1.8V
±
0.15V
Min Max
2
15
1
15
1
1
6
30
5.5
30
1.5
0.9
V
CCB
=2.5V
±
0.2V
Min Max
1.2
11
0.9
12
1
1
5.5
28
5
25
V
CCB
=3.3V
±
0.3V
Min Max
1.1
10
0.5
12
1
1
5.5
25
5
20
V
CCB
=5V
±
0.5V
Min
Max
1
10
0.3
13
1
1
5.5
23
5
20
5.0
2.5
0.5
40
Parameter
t
pd
t
en
t
dis
t
rA,
t
fA
t
rB,
t
fB
t
SK(O)
Max data
rate
Unit
ns
μs
ns
ns
ns
ns
Mbps
B
A
A
OE
B
A
OE
B
A port rise and fall
time
B port rise and fall
time
Channel-to-channel
5.0 1.5
4.5 0.6
0.5
5.0 1.5
3.5 0.5
0.5
5.0 1.5
3 0.4
0.5
40
40
40
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