Union Semiconductor UM3308 User Manual

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

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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

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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

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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

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