SCES643E datasheet(2/27 Pages) TI

Part #	SCES643E

Description	1.2 V to 3.6 V on A Port and 1.65 to 5.5 V on B Port (VCCA ??VCCB)

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Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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TXB0108

SCES643E – NOVEMBER 2006 – REVISED MAY 2012

www.ti.com

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

DESCRIPTION/ORDERING INFORMATION

This 8-bit noninverting translator uses two separate configurable power-supply rails. The A port is designed to

track VCCA. VCCA accepts any supply voltage from 1.2 V to 3.6 V. The B port is designed to track VCCB. VCCB

accepts any supply voltage from 1.65 V to 5.5 V. This allows for universal low-voltage bidirectional translation

between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, 3.3-V, and 5-V voltage nodes. VCCA should not exceed VCCB.

When the output-enable (OE) input is low, all outputs are placed in the high-impedance state.

The TXB0101 is designed so that the OE input circuit is supplied by VCCA.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs,

preventing damaging current backflow through the device when it is powered down.

To ensure the high-impedance state during power up or power down, OE should be tied to GND through a

pulldown resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver.

Table 1. ORDERING INFORMATION(1)

TA

PACKAGE(2)

ORDERABLE PART NUMBER

TOP-SIDE MARKING

QFN – RGY

Reel of 1000

TXB0108RGYR

YE08

SON – DQS

Reel of 2000

TXB0108DQSR

5MR

TSSOP – PW

Reel of 2000

TXB0108PWR

YE08

–40°C to 85°C

VFBGA – GXY

Reel of 2500

TXB0108GXYR

YE08

VFBGA – ZXY (Pb-free)

Reel of 2500

TXB0108ZXYR

YE08

DSBGA - YZP

Reel of 2500

TXB0108YZPR

5M

(1)

For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

web site at www.ti.com.

(2)

Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.

PIN DESCRIPTION

PIN NUMBER

NAME

FUNCTION

PW, RGY

DQS

YZP

1

A3

A1

Input/output 1. Referenced to VCCA.

2

5

C4

VCCA

A-port supply voltage. 1.1 V

≤ VCCA ≤ 3.6 V, VCCA ≤ VCCB.

3

2

A4

A2

Input/output 2. Referenced to VCCA.

4

3

B3

A3

Input/output 3. Referenced to VCCA.

5

4

B4

A4

Input/output 4. Referenced to VCCA.

6

7

C3

A5

Input/output 5. Referenced to VCCA.

7

8

E4

A6

Input/output 6. Referenced to VCCA.

8

9

D3

A7

Input/output 7. Referenced to VCCA.

9

10

E3

A8

Input/output 8. Referenced to VCCA.

10

6

D4

OE

Output enable. Pull OE low to place all outputs in 3-state mode. Referenced to VCCA.

11

15

D1

GND

Ground

12

11

E2

B8

Input/output 8. Referenced to VCCB.

13

12

D2

B7

Input/output 7. Referenced to VCCB.

14

13

E1

B6

Input/output 6. Referenced to VCCB.

15

14

C2

B5

Input/output 5. Referenced to VCCB.

16

17

B1

B4

Input/output 4. Referenced to VCCB.

17

18

B2

B3

Input/output 3. Referenced to VCCB.

18

19

A1

B2

Input/output 2. Referenced to VCCB.

19

16

C1

VCCB

B-port supply voltage. 1.65 V

≤ VCCB ≤ 5.5 V.

20

A2

B1

Input/output 1. Referenced to VCCB.

—

Thermal Pad

For the RGY package, the exposed center thermal pad must be connected to ground.

2

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