ST ST2329 User Manual

Features

■ 90 Mbps (max) data rate when driven by a

totem pole driver

■ 8 Mbps (max) data rate when driven by an

open drain pole driver

■ Bidirectional level translation without

direction control pin

■ Wide V

■ Wide V

■ Power down mode feature – when either

supply is off, all I/Os are in high impedance

■ Low quiescent current (max 12 µA)

■ Able to be driven by totem pole and open drain

drivers

■ 5.5 V tolerant enable pin

■ ESD performance on all pins: ±2 kV HBM

■ Small package and footprint

QFN10L (1.8 x 1.4 mm) package

voltage range of 1.65 to 3.6 V

L

voltage range of 1.80 to 5.5 V

CC

ST2329

2-bit dual supply level translator

without direction control pin

QFN10L (1.8 x 1.4 mm)

Description

The ST2329 is a 2-bit dual supply level translator
which provides the level shifting capability to allow
data transfer in a multi-voltage system. Externally
applied voltages, V
on either side of the device. It utilizes
transmission gate-based design that allows
bidirectional level translation without a control pin.

and VL, set the logic levels

CC

Applications

■ Low voltage system level translation

■ Mobile phones and other mobile devices

2

■ I

C level translation

■ UART level translation

The ST2329 accepts a V
V

from 1.80 to 5.5 V, making it ideal for data

CC

transfer between low-voltage ASICs/PLD and
higher voltage systems. This device has a tri-state
output mode which can be used to disable all
I/Os.

The ST2329 supports power down mode when
V

is grounded/floating and the device is

CC

from 1.65 to 3.6 V and

L

disabled via the OE pin.

Table 1. Device summary

Order code Package Packaging

ST2329QTR QFN10L (1.8 x 1.4 mm) Tape and reel (3000 parts per reel)

May 2008 Rev 4 1/21

www.st.com

21

Contents ST2329

Contents

1 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Device block diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Supplementary notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.1 Driver requirement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.2 Load driving capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.3 Power off feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.4 Truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4.1 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

5.1 AC characteristics (device driven by open drain driver) . . . . . . . . . . . . . . . 9

5.2 AC characteristics (device driven by totem pole driver ) . . . . . . . . . . . . . 11

6 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2/21

ST2329 Pin settings

1 Pin settings

1.1 Pin connection

Figure 1. Pin connection (top through view)

V

I/O

VL1

V

10 9

1

CC

L

8

I/O

VCC1

I/O

VL2

OE

1.2 Pin description

Table 2. Pin description

Pin number Symbol Name and function

1I/O

2I/O

3 OE Output enable

4 NC No connection

5 NC No connection

2

3

4

5

7

6

I/O

GND

VCC2

NC NC

CS00011

VL1

VL2

Data input/output

Data input/output

6 GND Ground

7 I/O

8 I/O

9V

10 V

VCC2

VCC1

CC

L

3/21

Data input/output

Data input/output

Supply voltage

Supply voltage

Device block diagrams ST2329

2 Device block diagrams

Figure 2. ST2329 block diagram

ST2329

VL

OE

EN

VL

I/O

VL

GND

* ST2329 has 2 channels. For simplicity, the above diagram shows onl y 1 channel.
* When OE is Low, all I/Os are in High-Impedance m ode.

Figure 3. Application block diagram

VL V

0.1 μF

V

L

System

Controller

I/O

I/O

OE

VL

VL1

VL2

VCC

I/O

VCC

GND

= one-shot circuit

CC

1 μF

0.1 μF

V

CC

VCC VCC VL VL

I/O

VCC1

I/O

VCC2

V

CC

System

Controller

4/21

ST2329 Supplementary notes

3 Supplementary notes

3.1 Driver requirement

The ST2329 may be driven by an open drain or totem pole driver and the nature of the
device’s output is “open drain”. It must not be used to drive a pull-down resistor since the
impedance of the output at HIGH state depends on the pull-up resistor placed at the I/Os.

As the device has pull-up resistors on both the I/O
ensure that the driver is able to sink the required amount of current. For example, if the
settings are V

=5.5V, VL= 4.3 V and the pull-up resistor is 10 kΩ, then the driver must be

CC

able to sink at least (5.5 V/10 kΩ) + (4.3 V /10 kΩ)
requirements of the ST2329.

3.2 Load driving capability

To support the open drain system, the one-shot transistor is turned on only during state
transition at the output side. When it drives a high state, after the one-shot transistor is
turned off, only the pull-up resistor is able to maintain the state. In this case, the resistive
load is not recommended.

During the translation from V

side to VL side, the oscillation might be triggered when the

CC

signal is reflected back as a glitch. This is caused by the architecture of the device (auto­direction).

When using the ST2329, care need to be taken in the PCB data-track design and output
loading. It is recommended that the load is less than 25 pf.

3.3 Power off feature

In some applications where it might be required to turn off one of the power supplies
powering up the level translator, the user may turn off the V
(device is disabled). There will be no current consumption in V
other causes, and the I/Os are in a high-impedance state in this mode.

and I/OVL ports, the user needs to

VCC

= 1 mA and still meet the V

only when the OE pin is low

CC

due to floating gates or

L

IL

3.4 Truth table

Table 3. Truth table

Enable Bidirectional Input/Output

OE I/O

(1)

H

(1)

H

L Z

1. High level VL power supply referred

2. High level VCC power supply referred

3. Z = high impedance

VCC

(2)

H

L L

(3)

5/21

I/O

H

Z

(1)

(3)

VL

Maximum rating ST2329

4 Maximum rating

Stressing the device above the rating listed in the “Absolute maximum ratings” table may
cause permanent damage to the device. These are stress ratings only, and operation of the
device at these or any other conditions above those indicated in the operating sections of
this specification is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability. Refer also to the STMicroelectronics SURE
Program and other relevant quality documents.

Table 4. Absolute maximum ratings

Symbol Parameter Value Unit

V

Supply voltage -0.3 to 4.6 V

L

V

V

V

I/OVL

V

I/OVCC

I

I/OVL

I

I/OVCC

I

SCTOUT

P

T

ESD Electrostatic discharge protection (HBM) ±2 kV

Supply voltage -0.3 to 6.5 V

CC

DC control input voltage -0.3 to 6.5 V

OE

DC I/OVL input voltage (OE = GND or VL) -0.3 to VL + 0.3 V

DC I/O

DC input diode current -20 mA

I

IK

input voltage (OE = GND or VL) -0.3 to VCC + 0.3 V

VCC

DC output current ±25 mA

DC output current ±258 mA

Short circuit duration, continuous 40 mA

Power dissipation

D

Storage temperature -65 to 150

STG

(1)

500 mW

TL Lead temperature (10 seconds) 300

o

C

o

C

1. 500mW: 65oC derated to 300 mW by 10W/oC: 65oC to 85oC

4.1 Recommended operating conditions

Table 5. Recommended operating conditions

Symbol Parameter Min Typ Max Unit

V

V

CC

V

VI/O

V

I/OVCC

T

dt/dV Input rise and fall time (for 45 Mbps operation) 0 1 ns/V

1. VCC must be greater than VL.

6/21

Supply voltage 1.65 3.6 V

L

(1)

Supply voltage 1.8 5.5 V

Input voltage

OE

(OE output enable pin, VL power supply referred)

I/OVL voltage 0 V

VL

I/O

voltage 0 V

VCC

Operating temperature -40 85

op

03.6V

L

CC

V

V

o

C

ST2329 Electrical characteristics

5 Electrical characteristics

Table 6. DC characteristics (over recommended operating conditions unless otherwise noted. All

typical values are at T

= 25 oC)

A

Test conditions Value

Symbol Parameter

TA = 2 5 oC-40 to 85 oC

V

V

L

CC

Unit

Min Typ Max Min Max

1.65

1.4 1.4

2.0 1.6 1.6

IHL

High level input
voltage (I/O

VL

V

L

to 5.5

2.5 2.0 2.0

)

V

V

3.0 2.4 2.4

3.6 2.8 2.8

1.65

0.3 0.3

2.0 0.4 0.4

ILL

Low level input
voltage (I/O

VL

V

2.5 0.5 0.5

)

V

L

to 5.5

V

3.0 0.6 0.6

3.6 0.8 0.8

1.8 1.6 1.6

2.5 2.3 2.3

High level input

IHC

voltage
(I/O

VCC

)

V

1.65 to
V

CC

3.0 2.7 2.7

3.6 3.3 3.3

V

4.3 3.5 3.5

V

V

V

ILC

IH-OE

IL-OE

Low level input
voltage
(I/O

)

VCC

High level input
voltage (OE)

Low level input
voltage (OE)

5.5 4.2 4.2

1.65 -

2.5

2.7 -

3.6

1.65

3 - 5.5 0.3

3.6 - 5.5 0.5

1.0 1.0

2.0 1.2 1.2

V

L

to 5.5

2.5 1.4 1.4

3.0 1.6 1.6

3.6 2.0 2.0

1.65

0.33 0.33

2.0 0.40 0.40

V

2.5 0.50 0.50

to 5.5

L

3.0 0.60 0.60

3.6 0.75 0.75

7/21

V

V

V