ST ST2329A User Manual
Features
■ 18 Mbps (max.) data rate when driven by
a totem pole driver
■ 6.8 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
voltage range of 1.65 to 3.6 V
L
voltage range of 1.80 to 5.5 V
CC
is off, all I/Os are in high impedance
■ Low quiescent current (max. 4 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:
QFN10 (1.8 x 1.4 mm) package
Applications
ST2329A
2-bit dual supply level translator
without direction control pin
QFN10
(1.8 x 1.4 mm)
Table 1. Device summary
Order code Package Packing
Tape and reel
(3000 parts per
reel)
ST2329AQTRQTR
QFN10
(1.8 x 1.4 mm)
■ Low voltage system level translation
■ Mobile phones and other mobile devices
2
■ I
C level translation
■ UART level translation
March 2011 Doc ID 14907 Rev 3 1/24
www.st.com
1
Contents ST2329A
Contents
1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Device block diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Supplementary notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.1 Driver requirement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.2 Load driving capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.3 Power off feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.4 Truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.1 DC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.2 AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.2.1 Device driven by open drain driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.2.2 Device driven by totem pole driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2/24 Doc ID 14907 Rev 3
ST2329A List of tables
List of tables
Table 1. Device summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 3. Truth table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 4. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 5. Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 6. DC characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 7. AC characteristics - test conditions: V
Table 8. AC characteristics - test conditions: V
Table 9. AC characteristics - test conditions: V
Table 10. AC characteristics - test conditions: V
Table 11. AC characteristics - test conditions: V
Table 12. AC characteristics - test conditions: V
Table 13. Test circuit switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 14. Waveform symbol value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 15. Mechanical data for QFN10 (1.8 x 1.4 x 0.5 mm) - 0.40 mm pitch . . . . . . . . . . . . . . . . . . . 20
Table 16. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
= 1.65 - 1.8 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
L
= 2.5 - 2.7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
L
= 2.7 - 3.6 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
L
= 1.65 - 1.8 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
L
= 2.5 - 2.7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
L
= 2.7 - 3.6 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
L
Doc ID 14907 Rev 3 3/24
List of figures ST2329A
List of figures
Figure 1. Pin connection (top through view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2. ST2329A block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 3. Application block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 4. Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 5. Waveform - propagation delay (f = 1 MHz; 50% duty cycle). . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 6. Waveform - output enable and disable time (f = 1 MHz; 50% duty cycle) . . . . . . . . . . . . . 18
Figure 7. Package outline for QFN10 (1.8 x 1.4 x 0.5 mm) - 0.40 mm pitch . . . . . . . . . . . . . . . . . . . 19
Figure 8. Footprint recommendation for QFN10 (1.8 x 1.4 x 0.5 mm) - 0.40 mm pitch . . . . . . . . . . . 20
Figure 9. Carrier tape for QFN10 (1.8 x 1.4 x 0.5 mm) - 0.40 mm pitch . . . . . . . . . . . . . . . . . . . . . . 21
Figure 10. Reel information for QFN10 (1.8 x 1.4 x 0.5 mm) - 0.40 mm pitch . . . . . . . . . . . . . . . . . . . 21
Figure 11. Reel information for QFN10 (1.8 x 1.4 x 0.5 mm) - 0.40 mm pitch . . . . . . . . . . . . . . . . . . . 22
4/24 Doc ID 14907 Rev 3
ST2329A Description
1 Description
The ST2329A 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
and V
, set the logic levels on either side of the device. It utilizes a transmission gate-based
L
design that allows bidirectional level translation without a control pin.
CC
The ST2329A accepts V
from 1.65 to 3.6 V and VCC from 1.80 to 5.5 V, making it ideal for
L
data 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 ST2329A supports power-down mode when V
is grounded/floating and the device is
CC
disabled via the OE pin.
Doc ID 14907 Rev 3 5/24
Pin settings ST2329A
2 Pin settings
2.1 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
2.2 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
6 GND Ground
2
3
4
5
7
6
I/O
GND
VCC2
NC NC
CS00011
VL1
VL2
Data input/output
Data input/output
7I/O
8I/O
9V
10 V
6/24 Doc ID 14907 Rev 3
VCC2
VCC1
CC
L
Data input/output
Data input/output
Supply voltage
Supply voltage
ST2329A Device block diagrams
3 Device block diagrams
Figure 2. ST2329A block diagram
6
34!
,
/%
6
)
/
6,
1. ST2329A has 2 channels. For simplicity, the diagram above shows only 1 channel.
2. When OE is LOW, all I/Os are in high impedance mode.
%.
6
,
##
ONESHOTCIRCUIT
)/
6
##
!-6
Figure 3. Application block diagram
6
,
6
,
3YSTEM
CONTROLLER
6
6
,
,
6
)/
)/
/%
,
6,
6,
6
##
6
##
6
6
##
##
6
##
3YSTEM
)/
6##
)/
6##
CONTROLLER
!-6
Doc ID 14907 Rev 3 7/24
Supplementary notes ST2329A
4 Supplementary notes
4.1 Driver requirements
The ST2329A may be driven by an open drain or totem pole driver and the nature of the
device output is “open drain”. It must not be used to drive a pull-down resistor as 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
CC
be able to sink at least (5.5 V / 10 kΩ) + (4.3 V / 10 kΩ)
requirements of the ST2329A.
4.2 Load driving capability
To support the open drain system, the one-shot transistor is turned on only during high
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.
4.3 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 is no current consumption in V
causes, and the I/Os are in a high impedance state in this mode.
4.4 Truth table
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 other
L
IL
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.
8/24 Doc ID 14907 Rev 3
VCC
(2)
H
L L
(3)
I/O
H
Z
(1)
(3)
VL
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