ST ST1G3234 User Manual

ST1G3234

1-bit dual supply bus buffer level translator with A-side series resistor

Features

■High speed: tPD = 4.4ns (Max.) at TA = 85°C VCCB = 1.65V; VCCA = 3.0V

■Low power dissipation:

ICCA = ICCB = 5µA(Max.) at TA = 85°C

■Symmetrical output impedance:

|IOHA| = IOLA = 10mA Min at

VCCA = 2.75V; VCCB = 1.4V to 3.6V |IOHA| = IOLA = 6mA Min at

VCCA = 2.3V; VCCB = 1.4V to 3.6V

■Balanced propagation delays: tPLH tPHL

■Power down protection on inputs and outputs

■26Ω series resistor on A-side outputs

–Operating voltage range:

VCCA(Opr) = 1.4V to 3.6V (1.2V data retent)

VCCB(Opr) = 1.4V to 3.6V (1.2V data retent)

■Max data rates:

380Mbps (1.8V to 3.3V translation) 260Mbps (<1.8V to 3.3V translation) 260Mbps (translate to 2.5V) 210Mbps (translate to 1.5V)

■Latch-up performance exceeds 500mA (JESD 17)

■ESD performance:

HBM > 2000V (MIL STD 883 method 3015); MM > 200V

■ROHS compliant for Flip-Chip package

Flip-Chip 5

Description

The ST1G3234 is a dual supply low voltage CMOS 1-Bit bus buffer level translator fabricated with sub-micron silicon gate and five-layer metal wiring C2MOS technology. Designed for use as an interface between a 3.3V bus and a 2.5V or 1.8V bus in a mixed 3.3V/1.8V, 3.3V/2.5V, 1.8V/1.4V and 2.5V/1.8V supply systems, it achieves high speed operation while maintaining the CMOS low power dissipation.

This IC is intended for one-way asynchronous communication between data buses. The input and output power down protections disable the device when both power supply are down, so that the buses are effectively isolated.

The input tolerant buffers allow to translate VCCB compatible signals and greater signals than VCCB up/down to VCCA.

All inputs are equipped with protection circuits against static discharge, giving them ESD immunity and transient excess voltage.

Order codes

Part number	Package	Comments
ST1G3234BJR	Flip-Chip 5	4000 parts per reel
August 2006	Rev 6	1/15
		www.st.com

Contents	ST1G3234

Contents

1	Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. 3
	1.1	Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3
	1.2	Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3
2	Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		4
3	Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		5
	3.1	Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6
4	Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		7
5	Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		9
6	Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		10
7	Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		11
8	Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		14

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ST1G3234	Pin settings

1 Pin settings

1.1Pin connection

Figure 1. Pin connection (top through view)

1.2	Pin description
	Table 1. Pin description
	Pin N°	Symbol	Name and function
	A1	A1	Data output (VCCA referred)
	C1	B1	Data input (VCCB referred)
	B2	GND	Ground (0V)
	A3	VCCA	Positive supply voltage
	C3	VCCB	Positive supply voltage

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Device summary	ST1G3234

2 Device summary

Figure 2. Input equivalent circuit

Figure 3. Logic diagram

Table 2. Truth table

Inputs B1 (VCCB Referred)	Outputs A1 (VCCA Referred)
L	L
H	H

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ST1G3234	Maximum rating

3 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 3. Absolute maximum ratings

	Symbol	Parameter	Value	Unit
	VCCA	Output supply voltage	-0.5 to +4.6	V
	VCCB	Input supply voltage	-0.5 to + 4.6	V
	VOA	DC output voltage	-0.5 to +4.6	V
		(power down mode: VCCA=VCCB=Gnd)
	VIB	DC input voltage	-0.5 to +4.6	V
		(power down mode: VCCA=VCCB=Gnd)
	VOA	DC output voltage	-0.5 to VCCA + 0.5	V
	VIB	DC input voltage	-0.5 to + 4.6	V
	IIK	DC input diode current	−20	mA
	IOK	DC output diode current	−50	mA
	IOA	DC output current	± 50	mA
	ICCA	DC VCCA or ground current	± 100	mA
	ICCB	DC VCCB or ground current	± 100	mA
	Pd	Power dissipation	200	mW
	Tstg	Storage temperature	-65 to +150	°C
	TL	Lead temperature (10 sec)	260	°C

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