ST ST2329I User Manual

ST2329I

2-bit dual-supply level translator with auto-direction feature and integrated pull-up

Target specification

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
pin
■ Wide VL voltage range of 1.65 V to 3.6 V
■ Wide VCC voltage range of 1.80 V to 5.5 V		QFN10 (1.8 x 1.4 mm)
■ Integrated 10 kΩ pull-up on both VCC and VL
sides
■ Power-down mode feature; when either supply
is off, all I/Os are in high impedance	Table 1.	Device summary

■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

Order code	Package	Packing
ST2329IQTR	QFN10	Tape and reel
	(1.8 x 1.4 mm)	(3000 parts per reel)

Applications

■Low voltage system level translation

■Mobile phones and other mobile devices

■I2C level translation

■UART level translation

March 2011	Doc ID 018508 Rev 1	1/22
This is preliminary information on a new product foreseen to be developed. Details are subject to change without notice.		www.st.com

Contents	ST2329I

Contents

1	Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		5
2	Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		6
	2.1	Supplementary notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7

2.1.1 Driver requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1.2 Load driving capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1.3 Power-off feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2 AC characteristics (device driven by open drain driver) . . . . . . . . . . . . . . 11 2.3 AC characteristics (device driven by totem pole driver) . . . . . . . . . . . . . . 13

3	Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	16
4	Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	21

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ST2329I	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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 8
Table 5.	Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 8
Table 6.	DC characteristics (over recommended operating conditions unless otherwise noted.
	All typical values are at TA = 25 °C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 9
Table 7.	For test conditions: VL = 1.65 to 1.8 V (load CL = 15 pF; Rup = 4.7 kΩ;
	driver tr = tf ≤2 ns) overtemperature range –40 °C to 85 °C . . . . . . . . . . . . . . . . . . . . . . . .	11
Table 8.	For test conditions: VL = 2.5 to 2.7 V (load CL = 15 pF; Rup = 4.7 kΩ;
	driver tr = tf ≤2 ns) overtemperature range –40 °C to 85 °C . . . . . . . . . . . . . . . . . . . . . . . .	11
Table 9.	For test conditions: VL = 2.7 to 3.6 V (load CL = 15 pF; Rup = 4.7 kΩ;
	driver tr = tf ≤2 ns) overtemperature range –40 °C to 85 °C . . . . . . . . . . . . . . . . . . . . . . . .	12
Table 10.	For test conditions: VL = 1.65 to 1.8 V (load CL = 15 pF; Rup = 10 kΩ;
	driver tr = tf ≤2 ns) overtemperature range –40 °C to 85 °C . . . . . . . . . . . . . . . . . . . . . . . .	13
Table 11.	For test conditions: VL = 2.5 to 2.7 V (load CL = 15 pF; Rup = 10 kΩ;
	driver tr = tf ≤2 ns) overtemperature range –40 °C to 85 °C . . . . . . . . . . . . . . . . . . . . . . . .	13
Table 12.	For test conditions: VL = 2.7 to 3.6 V (load CL = 15 pF; Rup = 10 kΩ;
	driver tr = tf ≤2 ns) overtemperature range –40 °C to 85 °C . . . . . . . . . . . . . . . . . . . . . . . .	14
Table 13.	Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	14
Table 14.	Waveform symbol value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	15
Table 15.	Mechanical data for QFN10 (1.8 x 1.4 x 0.5 mm) - 0.40 mm pitch . . . . . . . . . . . . . . . . . . .	17
Table 16.	Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	21

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List of figures	ST2329I

List of figures

Figure 1. Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 2. Device block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 3. Typical application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 4. Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 5. Waveform - propagation delay (f = 1 MHz, 50% duty cycle). . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 6. Waveform - output enable/disable (f = 1 MHz, 50% duty cycle) . . . . . . . . . . . . . . . . . . . . . 15 Figure 7. Package outline for QFN10 (1.8 x 1.4 x 0.5 mm) - 0.40 mm pitch . . . . . . . . . . . . . . . . . . . 16 Figure 8. Footprint recommendation for QFN10 (1.8 x 1.4 x 0.5 mm) - 0.40 mm pitch . . . . . . . . . . . 17 Figure 9. Carrier tape for QFN10 (1.8 x 1.4 x 0.5 mm) - 0.40 mm pitch . . . . . . . . . . . . . . . . . . . . . . 18 Figure 10. Reel information for QFN10 (1.8 x 1.4 x 0.5 mm) - 0.40 mm pitch - back view . . . . . . . . . 19 Figure 11. Reel information for QFN10 (1.8 x 1.4 x 0.5 mm) - 0.40 mm pitch - front view. . . . . . . . . . 20

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ST2329I	Description

1 Description

ST2329I 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, VCC and VL, set the logic levels on either side of the device. It utilizes a transmission gate based design that allows bidirectional level translation without a control pin.

The ST2329I accepts VL from 1.65 V to 3.6 V and VCC from 1.80 V to 5.5 V, making it ideal for 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 the I/Os.

The ST2329I supports power-down mode when VCC is grounded/floating and the device is disabled via the OE pin. The device has integrated 10 kΩ pull-ups on both sides.

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Pin configuration	ST2329I

2 Pin configuration

Figure 1. Pin configuration

1&. , TOP THROUGH VIEW

!-

Table 2.	Pin description
	QFN10 pin no	Symbol	Name and function
	1, 2	I/OVL1 to I/OVL2	Data inputs/outputs
	8, 7	I/OVCC1 to I/OVCC2	Data inputs/outputs
	3	OE	Output enable input
	6	GND	Ground
	10	VL	Supply voltage
	9	VCC	Supply voltage
	4, 5	NC	No connect

Figure 2. Device block diagram

6##

1.ST2329I 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.

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ST2329I	Pin configuration

Figure 3. Typical application diagram

6,					6##
6	, 6	6,	6##	6## 6##
		,			6##
6,
SYSTEM					SYSTEM
CONTROLLER		) /6,	) /6##		CONTROLLER
		) /6, ) /6##
		/%
					!-

1. External pull-up resistors are optional. Only needed if a pull-up value lower than 10 kΩ is desired.

2.1Supplementary notes

2.1.1Driver requirements

The ST2329I 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 I/OVCC and I/OVL ports, the user needs to ensure that the driver is able to sink the required amount of current. For example, if the settings are

VCC = 5.5 V, VL = 4.3 V, and the pull-up resistor is 10 kΩ, then the driver must be able to sink at least (5.5 V / 10 kΩ) + (4.3 V / 10 kΩ) ≈ 1 mA and still meet VIL requirements of ST2329I.

2.1.2Load 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 turned off, only the pull-up resistor is able to maintain the state. In this case, the resistive load is not recommended.

2.1.3Power-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 VCC only when the OE pin is low (device is disabled). There is no current consumption in VL due to floating gates or other causes, and the I/Os are in a high impedance state in this mode.

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