UM3308
8-Bit Bidirectional Voltage-Level Translator with Auto Direction
sensing and ±15kV ESD Protection
UM3308 CSP20
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
1.2V to 3.6V. The B port is designed to track V
CCB
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 40Mbps 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
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 3.0×2.5 CSP20 bump package.
Applications
z SPI, I2C Level Translation
Features
z 1.2V to 3.6V on A Port and 1.65V to 5.5V
z Low-Voltage ASIC Level Translation
z Cell-phone Cradles
z V
z Portable POS Systems
z Portable Communication Devices
z Low-Cost Serial Interfaces
z Cell-Phones
z GPS
z Telecommunications Equipment
z OE Input Circuit Referenced to V
z Low Power Consumption
z Latch-Up Performance Exceeds 100mA
z ±15kV ESD Protection on B ports
Pin Configurations
. V
CCA
. V
CCB
on B Port (V
Isolation Feature – If Either V
CC
accepts any supply voltage from
CCA
accepts any supply voltage from 1.65V
.
CCA
CCA
≤V
CCB
)
Input is at GND, All Outputs are in the
High-Impedance State
CCA
CC
(Bottom View)
(Top View)
XXX：Date Code
UM3308
CSP20
________________________________________________________________________
http://www.union-ic.com Rev.02 Mar.2009 1/12
Terminal Assignments
D
C
B
A
1 2 3 4 5
V
B2 B4 B6 B8
CCB
B1 B3 B5 B7 GND
A1 A3 A5 A7 OE
V
A2 A4 A6 A8
CCA
Pin Description
Pin No Pin Name Function
1 A1 Input/Output 1. Referenced to V
2 V
A-Port supply voltage. 1.1V≤V
CCA
3 A2 Input/Output 2. Referenced to V
4 A3 Input/Output 3. Referenced to V
5 A4 Input/Output 4. Referenced to V
6 A5 Input/Output 5. Referenced to V
7 A6 Input/Output 6. Referenced to V
8 A7 Input/Output 7. Referenced to V
9 A8 Input/Output 8. Referenced to V
10 OE
3-state output enable. Pull OE low to place all outputs in 3-state
mode. Referenced to V
CCA
CCA
≤3.6V and V
CCA
CCA
CCA
CCA
CCA
CCA
CCA
CCA
CCA≤VCCB
11 GND Ground
12 B8 Input/Output 8. Referenced to V
13 B7 Input/Output 7. Referenced to V
14 B6 Input/Output 6. Referenced to V
15 B5 Input/Output 5. Referenced to V
16 B4 Input/Output 4. Referenced to V
17 B3 Input/Output 3. Referenced to V
18 B2 Input/Output 2. Referenced to V
19 V
B-Port supply voltage. 1.65V≤V
CCB
20 B1 Input/Output 1. Referenced to V
CCB
CCB
CCB
CCB
CCB
CCB
CCB
CCB
CCB
≤5.5V
Ordering Information
Part Number Packaging Type Marking Code Shipping Qty
UM3308 CSP20 YE08
2500pcs/7Inch
UM3308
Tape & Reel
________________________________________________________________________
http://www.union-ic.com Rev.02 Mar.2009 2/12
UM3308
Absolute Maximum Ratings (Note 1)
Over operating free-air temperature range (unless otherwise noted)
Symbol Parameter Value Unit
V
Supply Voltage Range -0.5 to +4.5 V
CCA
V
Supply Voltage Range -0.5 to +6.5 V
CCB
VI Input Voltage Range (Note 2)
A ports -0.5 to +4.5
B ports -0.5 to +6.5
V
Voltage Range applied to any output
VO
in the high-impedance or power-off
state (Note 2)
VO
Voltage Range applied to any output
in the high or low state (Note 2,3)
IIK Input Clamp Current
IOK Output Clamp Current
A ports -0.5 to +4.5
B ports -0.5 to +6.5
A ports -0.5 to ( V
B ports -0.5 to ( V
＜0
V
I
＜0
V
O
+0.5)
CCA
+0.5)
CCB
-50 mA
-50 mA
V
V
IO Continuous Output Current ±50 mA
Continuous Current through V
CCA
, V
, or GND ±100 mA
CCB
θJA Package thermal impedance 78 °C/W
TOP Operating Temperature Range -40 to +85 °C
T
Storage Temperature Range -65 to +150 °C
STG
Note1. 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.
Note2. The input and output negative-voltage ratings may be exceeded if the input and output
current ratings are observed.
Note3. The value of V
CCA
and V
are provided in the recommended operating conditions table.
CCB
Recommended Operating Conditions (Note 1, 2)
Symbol Parameter V
V
1.2 3.6 V
CCA
V
CCB
VIH High Level Input Voltage
VIL Low Level Input Voltage
Δt/Δv
Input Transition
Rise or Fall Time
Supply Voltage
Data Inputs 1.2V to 3.6V 1.65V to 5.5V V
OE 1.2V to 3.6V 1.65V to 5.5V V
Data Inputs 1.2V to 5.5V 1.65V to 5.5V 0 V
OE 1.2V to 3.6V 1.65V to 5.5V 0 V
A-Port Inputs 1.2V to 3.6V 1.65V to 5.5V 40
B-Port Inputs 1.2V to 3.6V
Note1. The A and B sides of an unused data I/O pair must be held in the same state, i.e., both at V
at GND.
Note2. V
Note3. V
must be less than or equal to V
CCA
is the supply voltage associated with the input port.
CCI
and must not exceed 3.6 V.
CCB
V
CCA
1.65V to 3.6V 40
Min Max Unit
CCB
4.5V to 5.5V 30
1.65 5.5 V
(Note3)
×0.65
CCI
×0.65 5.5 V
CCA
V
V
CCI
×0.35 V
CCI
×0.35 V
CCA
or both
CCI
ns/V
________________________________________________________________________
http://www.union-ic.com Rev.02 Mar.2009 3/12
UM3308
Electrical Characteristics (Note 1, 2)
Over recommended operating free-air temperature range (unless otherwise noted)
Parameter Test Conditions V
=-20μA
V
OHA
V
OLA
V
I
OHB
V
I
OLB
II OE 1.2V to 3.6V 1.65V to 5.5V ±1 ±2 μA
I
off
IOZ A or B Port OE=GND 1.2V to 3.6V 1.65V to 5.5V ±1 ±2 μA
Ci OE 1.2V to 3.6V 1.65V to 5.5V 5 5.5 pF
CiO
Note1. V
Note2. V
A Port 0V 0V to 5.5V ±1 ±2
B Port 0V to 3.6V 0V ±1 ±2
I
CCA
I
CCB
I
+I
CCA
CCB
I
CCZA
I
CCZB
A Port 5 6.5
B Port
is the supply voltage associated with the input port.
CCI
is the supply voltage associated with the output port.
CCO
I
OH
=20μA
I
OL
=-20μA 1.65V to 5.5V V
OH
=20μA 1.65V to 5.5V 0.4 V
OL
or GND
V
I=VCCI
=0
I
O
or GND
V
I=VCCI
=0
I
O
or GND
V
I=VCCI
=0
I
O
or GND
V
I=VCCI
=0, OE=GND
I
O
or GND
V
I=VCCI
=0, OE=GND
I
O
1.2V to 3.6V 1.65V to 5.5V
V
CCA
1.2V 1.1
1.4V to 3.6V
1.2V 0.9
1.4V to 3.6V
1.2V 1.65V to 5.5V 0.06
1.4V to 3.6V 1.65V to 5.5V 5
3.6V 0V 2
0V 5.5V -2
1.2V 1.65V to 5.5V 3.4
1.4V to 3.6V 1.65V to 5.5V 5
3.6V 0V -2
0V 5.5V 2
1.2V 1.65V to 5.5V 3.5
1.4V to 3.6V 1.65V to 5.5V 10
1.2V 1.65V to 5.5V 0.05
1.4V to 3.6V 1.65V to 5.5V 5
1.2V 1.65V to 5.5V 3.3
1.4V to 3.6V 1.65V to 5.5V 5
CCB
TA=25℃ -40℃ to 85℃
Typ Max Min Max
V
0.4
8 10
-0.4
CCA
-0.4 V
CCB
Unit
V
V
μA
μA
μA
μA
μA
μA
pF
________________________________________________________________________
http://www.union-ic.com Rev.02 Mar.2009 4/12
Switching Characteristics
TA=+25°C, V
CCA
= 1.2V
Parameter
tpd
From
(Input)
A B 7 6 5.3 5.5
B A 7.5 6.5 6 6
ten OE
t
OE
dis
t
rA, tfA
t
rB, tfB
t
SK(O)
A port rise and fall
B port rise and fall
Channel-to-channel 0.5 0.5 0.5 1.5 ns
Max data
rate
time
time
To
(Output)
V
=1.8V V
CCB
=2.5V V
CCB
Typ Typ Typ Typ
A 1 1 1 1
B 1 1 1 1
A 18 16 14 14
B 19 17 15 15
5 5 5 5 ns
2.5 1.5 1.2 1 ns
20 20 20 20 Mbps
Switching Characteristics
Over recommended operating free-air temperature range, V
noted)
From
(Input)
tpd
A B 2 15 1.2 11 1.1 10 1 10
B A 1 15 0.9 12 0.5 12 0.3 13
ten OE
t
OE
dis
t
rA, tfA
t
rB, tfB
t
SK(O)
A port rise and fall
B port rise and fall
Channel-to-channel 0.5 0.5 0.5 0.5 ns
Max data
rate
=1.8V
To
(Output)
CCB
±0.15V
Min MaxMin MaxMin MaxMin Max
A 1 1 1 1
B 1 1 1 1
A 6 30 5.5 28 5.5 25 5.5 23
B 5.5 30 5 25 5 20 5 20
time
time
1.5 5.0 1.5 5.0 1.5 5.0 1.5 5.0 ns
0.9 4.5 0.6 3.5 0.5 3 0.4 2.5 ns
40 40 40 40 Mbps
V
=2.5V
CCB
±0.2V
V
UM3308
=3.3V V
CCB
=1.5V±0.1V (unless otherwise
CCA
V
=3.3V
CCB
±0.3V
CCB
V
CCB
±0.5V
=5V
=5V
Parameter
Unit
ns
μs
ns
Unit
ns
μs
ns
________________________________________________________________________
http://www.union-ic.com Rev.02 Mar.2009 5/12
Switching Characteristics
Over recommended operating free-air temperature range, V
noted)
From
(Input)
tpd
A B 1.6 10 1.4 9 1.3 7 1.2 6.5
B A 1.5 12 1.3 8.5 1 8 0.9 8
ten OE
t
OE
dis
t
rA, tfA
t
rB, tfB
t
SK(O)
A port rise and fall
B port rise and fall
Channel-to-channel 0.5 0.5 0.5 0.5 ns
Max data
rate
=1.8V
To
(Output)
CCB
±0.15V
Min MaxMin MaxMin MaxMin Max
A 1 1 1 1
B 1 1 1 1
A 6 34 5.5 23 5 20 5 17.6
B 5.5 33 4.5 22 4.2 16.8 4.4 16.3
time
time
1 4.2 1.1 4.0 1.1 4.0 1.1 4.0 ns
0.9 4 0.6 3.2 0.5 2.8 0.4 2.8 ns
60 60 60 60 Mbps
V
=2.5V
CCB
±0.2V
V
Switching Characteristics
Over recommended operating free-air temperature range, V
noted)
V
=2.5V
Parameter
tpd
From
(Input)
A B 1.1 6.5 1 5.2 0.9 5
B A 1.2 6.6 1.1 5.1 0.9 4.4
ten OE
t
OE
dis
t
A port rise and fall time 0.8 3 0.8 3 0.8 3 ns
rA, tfA
t
B port rise and fall time 0.7 2.7 0.5 2.8 0.4 2.7 ns
rB, tfB
t
Channel-to-channel 0.5 0.5 0.5 ns
SK(O)
Max data
rate
100 100 100 Mbps
To
(Output)
A 1 1 1
B 1 1 1
A 5.0 23 4.6 15.2 4.6 13
B 4.4 22 3.8 16 3.9 13.3
CCB
±0.2V
Min Max Min Max Min Max
UM3308
=1.8V±0.15V (unless otherwise
CCA
V
=3.3V
CCB
±0.3V
=2.5V±0.2V (unless otherwise
CCA
V
=3.3V
CCB
±0.3V
V
=5V
CCB
±0.5V
V
CCB
±0.5V
Parameter
=5V
Unit
ns
μs
ns
Unit
ns
μs
ns
________________________________________________________________________
http://www.union-ic.com Rev.02 Mar.2009 6/12
Switching Characteristics
Over recommended operating free-air temperature range, V
noted)
V
=3.3V
From
(Input)
tpd
A B 0.9 5 0.8 4
B A 1 5.1 0.9 4
ten OE
t
OE
dis
t
A port rise and fall time 0.7 2.5 0.7 2.5 ns
rA, tfA
t
B port rise and fall time 0.5 2.1 0.4 2.8 ns
rB, tfB
t
Channel-to-channel 0.5 0.5 ns
SK(O)
Max data
rate
100 100 Mbps
To
(Output)
A 1 1
B 1 1
A 5 15 4 13
B 4 16 3.4 13.8
CCB
±0.3V
Min Max Min Max
Operating Characteristics
TA=+25°C
V
Pamameter Test Conditions
A-port input
B-port output
B-port input
A-port output
A-port input
B-port output
B-port input
A-port output
A-port input
B-port output
B-port input
A-port output
A-port input
B-port output
B-port input
A-port output
=0, f=10MHz,
C
L
=1ns,
t
r=tf
OE= V
=0, f=10MHz,
C
L
=1ns,
t
r=tf
OE= GND
CCA
C
pdA
C
pdB
C
pdA
C
pdB
5V 1.8V 1.8V 1.8V 2.5V 5V
V
1.2V 1.2V 1.5V 1.8V 2.5V 2.5V 3.3V
Typ Typ Typ Typ Typ Typ Typ
9 10 10 10 10 10 10
12 11 11 11 11 11 11
35 28 28 29 3.0 30 30
27 19 19 19 20 21 23
0.01 0.01 0.01 0.01 0.01 0.01 0.01
0.01 0.01 0.01 0.01 0.01 0.01 0.01
0.01 0.01 0.01 0.01 0.01 0.01 0.03
0.01 0.01 0.01 0.01 0.01 0.01 0.05
UM3308
=3.3V±0.3V (unless otherwise
CCA
V
=5V
CCB
CCB
CCA
±0.5V
Parameter
3.3V
to 5V
Unit
ns
μs
ns
Unit
pF
pF
________________________________________________________________________
http://www.union-ic.com Rev.02 Mar.2009 7/12
UM3308
Applications Information
UM3308 ESD protected level translator provides level shifting necessary to allow data transfer in
a multi-voltage system. Externally applied voltages, V
side of device. A low voltage signal present on V
logic signal on the V
side of the device, and vice-versa.
CCB
CCA
Block Diagram
The UM3308 (block diagram see Figure 1) does not require a direction-control signal to control
the direction of data flow from A to B or from B to A. In a dc state, the output drivers of the
UM3308 can maintain a high or low, but are designed to be weak, so that they can be overdriven
by an external driver when data on the bus starts flowing the opposite direction.
The output one shot detects rising or falling edges on the A or B ports. During a rising edge, the
one shot turns on the PMOS transistors (T1, T3) for a short duration, which speeds up the
low-to-high transition. Similarly, during a falling edge, the one shot turns on the NMOS
transistors (T2, T4) for a short duration, which speeds up the high-to-low transition.
Figure 1 Block Diagram of UM3308 I/O Cell
CCA
and V
set the logic levels on either
CCB
side of the device appears as a high voltage
________________________________________________________________________
http://www.union-ic.com Rev.02 Mar.2009 8/12
UM3308
Input Driver Requirements
Typical IIN vs VIN characteristics of the UM3308 are shown in Figure 2. For proper operation, the
device driving the data I/Os of the UM3308 must have drive strength of at least ±2 mA.
A: V
is the input threshold voltage of the UM3308 (typical V
T
B: V
is the supply voltage of the external driver.
D
Figure 2 Typical I
vs VIN Curve
IN
Power Up
During operation, ensure that V
CCA≤VCCB
at all times. During power-up sequencing, V
does not damage the device, so any power supply can be ramped up first. The UM3308 has
circuitry that disables all output ports when either V
is switched off (V
CC
CCA/B
Enable and Disable
The UM3308 has an OE input that is used to disable the device by setting OE = low, which places
all I/Os in the high-impedance (Hi-Z) state. The disable time (tdis) indicates the delay between
when OE goes low and when the outputs acutally get disabled (Hi-Z). The enable time (ten)
indicates the amount of time the user must allow for the one-shot circuitry to become operational
after OE is taken high.
Pullup or Pulldown Resistors on I/O Lines
The UM3308 is designed to drive capacitive loads of up to 50pF. The output drivers of the
UM3308 have low dc drive strength. If pullup or pulldown resistors are connected externally to
the data I/Os, their values must be kept higher than 50 kΩ to ensure that they do not contend with
the output drivers of theUM3308.
For the same reason, the UM3308 should not be used in applications such as I
where an open-drain driver is connected on the bidirectional data I/O.
/2)
CCI
= 0 V).
≥ V
CCA
2
C or 1-Wire
CCB
________________________________________________________________________
http://www.union-ic.com Rev.02 Mar.2009 9/12
Typical Operating Circuit
Test Circuits
Figure 3 Load Circuits and Voltage Waveforms
UM3308
Figure 3 Typical operating circuit
________________________________________________________________________
http://www.union-ic.com Rev.02 Mar.2009 10/12
Package Information
Outline Drawing
UM3308: CSP20
Symbol
A 0.61 0.024
A1 0.15 0.25 0.006 0.01
A2 0.32 0.405 0.0128 0.0162
D 2.90 3.10 0.116 0.124
E 2.40 2.60 0.096 0.104
D1 2.00BSC 0.08BSC
E1 1.50BSC 0.06BSC
e 0.50BSC 0.02BSC
b 0.25 0.35 0.01 0.014
UM3308
DIMENSIONS
Millimeters Inch
Min Max Min Max
Land Pattern
Tape and Reel Orientation
NOTES:
1. Bump is Lead Free Sn/Ag/Cu.
2. Non-solder mask defined copper landing pad.
3.Laser Mark on silicon die back; back-lapped, no coating.
________________________________________________________________________
http://www.union-ic.com Rev.02 Mar.2009 11/12
UM3308
IMPORTANT NOTICE
The information in this document has been carefully reviewed and is believed to be
accurate. Nonetheless, this document is subject to change without notice. Union assumes
no responsibility for any inaccuracies that may be contained in this document, and makes
no commitment to update or to keep current the contained information, or to notify a
person or organization of any update. Union reserves the right to make changes, at any
time, in order to improve reliability, function or design and to attempt to supply the best
product possible.
Union Semiconductor, Inc
Add: 7F, No. 5, Bibo Road, Shanghai 201203
Tel: 021-51097928
Fax: 021-51026018
Website: www.union-ic.com
________________________________________________________________________
http://www.union-ic.com Rev.02 Mar.2009 12/12
Loading...