ST ST2329B User Manual

ST2329B

2-bit dual supply level translator without direction control pin, open drain output

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

■Bi-directional level translation without direction control pin

■Wide VL voltage range of 1.65 to 3.6 V

■Wide VCC voltage range of VL to 5.5 V

■Power-down mode feature: when either supply 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:

QFN8 (1.4 x 1.2 x 0.55 mm) package

Applications

■Low-voltage system level translation

■Mobile phones and other mobile devices

■I2C level translation

■UART level translation

Datasheet −preliminary data

QFN8

(1.4 x 1.2 x 0.55 mm)

	Table 1.	Device summary
	Order code		Package	Packing	Package
					topmark
			QFN8	Tape and
				reel (3000
	ST2329BQTR		(1.4 x 1.2 x		3A
				parts per
			0.55 mm)
				reel)

June 2012

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This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to	www.st.com
change without notice.

Contents	ST2329B

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 requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		21

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ST2329B	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: VL = 1.65 - 1.8 V

(device driven by open drain driver) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 8. AC characteristics - test conditions: VL = 2.5 - 2.7 V

(device driven by open drain driver) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 9. AC characteristics - test conditions: VL = 2.7 - 3.6 V

(device driven by open drain driver) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Table 10. AC characteristics - test conditions: VL = 1.65 - 1.8 V

(device driven by totem pole driver) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 11. AC characteristics - test conditions: VL = 2.5 - 2.7 V

(device driven by totem pole driver) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Table 12. AC characteristics - test conditions: VL = 2.7 - 3.6 V

(device driven by totem pole driver) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Table 13. Test circuit switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Table 14. Waveform symbol value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Table 15. Mechanical data for QFN8 (1.4 x 1.2 x 0.55 mm) - 0.40 mm pitch . . . . . . . . . . . . . . . . . . . 20 Table 16. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

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List of figures	ST2329B

List of figures

Figure 1. Pin connection (top through view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 2. ST2329BQTR 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 QFN8 (1.4 x 1.2 x 0.55 mm) - 0.40 mm pitch . . . . . . . . . . . . . . . . . . . 19 Figure 8. Reel for carrier tape - 8 width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

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ST2329B	Description

1 Description

The ST2329B 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 bi-directional level translation without a control pin.

The ST2329B accepts VL from 1.65 to 3.6 V and VCC from 1.80 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 I/Os.

The ST2329B supports power-down mode when VCC is grounded/floating and the device is disabled via the OE pin.

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Pin settings	ST2329B

2 Pin settings

2.1Pin connection

Figure 1. Pin connection (top through view)

!-V

2.2Pin description

Table 2.	Pin description
	Pin number		Symbol	Name and function
	1		VL	Supply voltage
	2		I/OVL1	Data input/output
	3		I/OVL2	Data input/output
	4		GND	Ground
	5		OE	Output enable
	6		I/OVCC2	Data input/output
	7		I/OVCC1	Data input/output
	8		VCC	Supply voltage

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ST2329B	Device block diagrams

3 Device block diagrams

Figure 2. ST2329BQTR block diagram

1.When OE is LOW, all I/Os are in high-impedance mode.

2.The ST2329BQTR has 2 channels. For simplicity, the diagram above shows only 1 channel.

Figure 3. Application block diagram

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