TXB0108

TXB0108 8-Bit Bidirectional Voltage-Level Translator with Auto-Direction Sensing and ±15kV ESD Protection

Manufacturer

unknown

Overview

Part: TXB0108

Type: 8-Bit Bidirectional Voltage-Level Translator

Key Specs:

  • A Port Voltage: 1.2V to 3.6V
  • B Port Voltage: 1.65V to 5.5V
  • Max ICC: 4μA
  • B Port ESD Protection (Human-Body Model): ±15kV
  • A Port ESD Protection (Human-Body Model): 2000V
  • Charged-Device Model ESD Protection: 1000V

Features:

  • Auto-Direction Sensing
  • VCC Isolation Feature
  • OE Input Circuit Referenced to VCCA
  • Ioff Supports Partial-Power-Down Mode Operation
  • Latch-Up Performance Exceeds 100mA Per JESD 78, Class II

Applications:

  • Handset
  • Smartphone
  • Tablet
  • Desktop PC

Package:

  • SON (20): 2.00mm x 4.00mm
  • BGA MICROSTAR JUNIOR (20): 2.50mm x 3.00mm
  • TSSOP (20): 6.50mm x 4.40mm
  • VQFN (20): 4.50mm x 3.50mm
  • DSGBA (20): 1.90mm x 2.40mm
  • nFBGA (20): 2.50mm x 3.00mm
  • WQFN (20): 3.00mm x 3.00mm
  • VSSOP (20): 5.10mm x 3.00mm
  • VQFN (20): 4.50mm x 2.50mm

Features

  • 1.2V to 3.6V on A Port and 1.65V to 5.5V on B Port (VCCA ≤ VCCB)
  • VCC Isolation Feature If Either VCC Input Is at GND, All Outputs Are in the High-Impedance State
  • OE Input Circuit Referenced to VCCA
  • Low Power Consumption, 4μA Max ICC
  • Ioff Supports Partial-Power-Down Mode Operation
  • Latch-Up Performance Exceeds 100mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • A Port
      • 2000V Human-Body Model (A114-B)
      • 1000V Charged-Device Model (C101)
    • B Port
      • ±15kV Human-Body Model (A114-B)
      • ±8kV Human-Body Model (A114-B) (YZP Package Only)
      • 1000V Charged-Device Model (C101)

Pin Configuration

Figure 4-1. DGS/PW Package (Top View)

Figure 4-3. RGY/RKS Package (Top View)

YZPR2 PACKAGE(1) (BALL SIDE VIEW)

<sup>(1)See orderable addendum at the end of the data sheet

Figure 4-2. DQS Package (Top View)

Figure 4-4. RUK Package (Top View)

Figure 4-6. NME/GXY/ZXY PACKAGE (BOTTOM VIEW)

  • Figure 4-5. YZPR2 PACKAGE (BALL SIDE VIEW)
  • A. For the RKS/RGY/RUK package, the exposed center thermal pad must be connected to ground.
  • B. Pullup resistors are not required on both sides for Logic I/O.
  • C. If pullup or pulldown resistors are needed, the resistor value must be over $50 k\Omega.$
  • D. $50k\Omega$ is a safe recommended value, if the customer can accept higher $V_{OL}$ or lower $V_{OH}$ , smaller pullup or pulldown resistor is allowed, the draft estimation is $V_{OL} = V_{CCOUT} \times 4.5k/(4.5k + R_{PU})$ and $V_{OH} = V_{CCOUT} \times R_{DW}/(4.5k + R_{DW})$ .
  • E. If pullup resistors are needed, please refer to the TXS0108 or contact TI.
  • F. For detailed information, please refer A Guide to Voltage Translation With TXB-Type Translators.

Table 4-1. Pin Functions

PINin i uncuons
SIGNAL
NAME		PW, RGY NO.DQS NO.RUK NO.YZP GRID
LOCATOR		I/O (1)FUNCTION
A11119A3I/OInput/output 1. Referenced to V CCA .
V CCA2520C4SA-port supply voltage. 1.1V $\leq$ V CCA $\leq$ 3.6V, V CCA $\leq$ V CCB .
A2321A4I/OInput/output 2. Referenced to V CCA .
A3432B3I/OInput/output 3. Referenced to V CCA .
A4543B4I/OInput/output 4. Referenced to V CCA .
A5674C3I/OInput/output 5. Referenced to V CCA .
A6785E4I/OInput/output 6. Referenced to V CCA .
A7896D3I/OInput/output 7. Referenced to V CCA .
A89107E3I/OInput/output 8. Referenced to V CCA .
OE1068D4IOutput enable. Pull OE low to place all outputs in 3-state mode. Referenced to $V_{\text{CCA}}$ .
GND11159D1SGround
B8121110E2I/OInput/output 8. Referenced to V CCB .
B7131211D2I/OInput/output 7. Referenced to V CCB .
B6141312E1I/OInput/output 6. Referenced to V CCB .
B5151413C2I/OInput/output 5. Referenced to V CCB .
B4161714B1I/OInput/output 4. Referenced to V CCB .
B3171815B2I/OInput/output 3. Referenced to V CCB .
B2181916A1I/OInput/output 2. Referenced to V CCB .
V CCB191617C1SB-port supply voltage. 1.65V ≤ V CCB ≤ 5.5V.
B1202018A2I/OInput/output 1. Referenced to V CCB .
Thermal
Pad		-__For the RGY/RUK package, the exposed center thermal pad must be connected to ground.

(1) I = input, O = output, I/O = input and output, S = power supply

Electrical Characteristics

over recommended operating free-air temperature range (unless otherwise noted)(1) (2)

| | | TEST | | | | TA = 25°C | | –40°C to 85°C | |-------------|-------------|----------------------|--------------|---------------|-----|-----------|-----|---------------|-----|------| | | PARAMETER | CONDITIONS | VCCA
VCCB | | MIN | TYP | MAX | MIN | MAX | UNIT | | | | | 1.2V | | | 1.1 | | VOHA | | IOH = –20μA | 1.4V to 3.6V | | | | | VCCA – 0.4 | | V | | | | | 1.2V | | | 0.3 | | | | V | | VOLA | | IOL = 20μA | 1.4V to 3.6V | | | | | | 0.4 | | VOHB | | IOH = –20 μA | | 1.65V to 5.5V | | | | VCCB – 0.4 | | V | | VOLB | | IOL = 20μA | | 1.65V to 5.5V | | | | | 0.4 | V | | II | OE | | 1.2V to 3.6V | 1.65V to 5.5V | | | ±1 | | ±2 | μA | | | A port | | 0V | 0V to 5.5V | | | ±1 | | ±2 | μA | | Ioff | B port | | 0V to 3.6V | 0V | | | ±1 | | ±2 | | IOZ | A or B port | OE = GND | 1.2V to 3.6V | 1.65V to 5.5V | | | ±1 | | ±2 | μA | | | | | 1.2V | | | 0.45 | | | | VI
= VCCI or GND, | 1.4V to 3.6V | 1.65V to 5.5V | | | | | 5 | | ICCA | | IO = 0 | 3.6V | 0V | | | | | 2 | μA | | | | | 0V | 5.5V | | | | | –2 | | | | | 1.2V | | | 3.4 | | | | VI
= VCCI or GND, | 1.4V to 3.6V | 1.65V to 5.5V | | | | | 5 | | ICCB | | IO = 0 | 3.6V | 0V | | | | | –2 | μA | | | | | 0V | 5.5V | | | | | 2 | | | | VI
= VCCI or GND, | 1.2V | | | 3.5 | | ICCA + ICCB | | IO = 0 | 1.4V to 3.6V | 1.65V to 5.5V | | | | | 10 | μA |

over recommended operating free-air temperature range (unless otherwise noted)(1) (2)

| | TEST
PARAMETER | | | TA = 25°C | –40°C to 85°C | |-------|------------------------------|----------------------|--------------|---------------|-------------------|------------|------| | | | CONDITIONS | VCCA | VCCB | MIN
TYP
MAX | MIN
MAX | UNIT | | | VI
= VCCI or GND,
1.2V | | | 0.05 | | ICCZA | | IO = 0,
OE = GND | 1.4V to 3.6V | 1.65V to 5.5V | | 5 | μA | | | | VI
= VCCI or GND, | 1.2V | | 3.3 | | ICCZB | | IO = 0,
OE = GND | 1.4V to 3.6V | 1.65V to 5.5V | | 5 | μA | | CI | OE | | 1.2V to 3.6V | 1.65V to 5.5V | 5 | 6.5 | pF | | | A port | | | | 5 | 6.5 | | Cio | B port | | 1.2V to 3.6V | 1.65V to 5.5V | 8 | 13.3 | pF |

  • (1) VCCI is the supply voltage associated with the input port.
  • (2) VCCO is the supply voltage associated with the output port.

Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)

MINMAXUNIT
V CCASupply voltage range-0.54.6V
V CCBSupply voltage range-0.56.5V
VIInput voltage range (2)-0.56.5V
VoVoltage range applied to any output in the high-impedance or power-0.56.5V
/Voltage range emplied to any output in the high or law state(2) (3)A inputs-0.5V CCA + 0.5V
VoVoltage range applied to any output in the high or low state (2) (3)B inputs-0.5V CCB + 0.5V
I IKInput clamp currentV I < 0-50mA
I OKOutput clamp currentV O < 0-50mA
IoContinuous output current±50mA
Continuous current through V CCA , V CCB , or GND±100mA
T stgStorage temperature range-65150°C
TJJunction temperature150°C

(1) Stresses beyond those listed under Section 5.1 may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Section 5.3 is not implied. Exposure to absolute maximum rated conditions for extended periods may affect device reliability.

Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted) (1) (2)

| | | | V CCA | V CCB | MIN | MAX | UNIT | |-----------------|------------------------------------|---------------|------------------|------------------|----------------------------------------|----------------------------------------|----------|--| | $V_{CCA}$ | Supply voltage | | | | 1.2 | 3.6 | V | | $V_{CCB}$ | Supply voltage | | | | 1.65 | 5.5 | v | | V | High-level input voltage | Data inputs | 1.2V to 3.6V | 1.65V to 5.5V | V CCI x 0.65 (3) | V CCI | V | | V IH | r ligh-level lilput voltage | OE | 1.20 to 3.00 | 1.030 to 3.30 | V CCA x 0.65 | 5.5 | v | | V | Low-level input voltage | Data inputs | 1.2V to 5.5V | 1.65V to 5.5V | 0 | V CCI x 0.35 (3) | V | | V IL | Low-level input voltage | OE | 1.2V to 3.6V | 1.050 10 5.50 | 0 | V CCA x 0.35 | v | | | | A-port inputs | 1.2V to 3.6V | 1.65V to 5.5V | | 40 | | Δt/Δν | Input transition rise or fall rate | B-port inputs | 1.2V to 3.6V | 1.65V to 3.6V | | 40 | ns/V | | | rise or fall rate | D-port inputs | 1.20 10 3.00 | 4.5V to 5.5V | | 30 | Copyright © 2026 Texas Instruments Incorporated

Product Folder Links: TXB0108

(2) The input and output negative-voltage ratings may be exceeded if the input and output current ratings are observed.

(3) The value of VCCA and VCCB are provided in the recommended operating conditions table.

(2) JEDEC document JEP157 states that 250V CDM allows safe manufacturing with a standard ESD control process.

over operating free-air temperature range (unless otherwise noted) (1) (2)

VCCAVCCBMIN
MAX		UNIT
TAOperating free-air temperature–40
85		°C
  • (1) The A and B sides of an unused data I/O pair must be held in the same state, i.e., both at VCCI or both at GND.
  • (2) VCCA must be less than or equal to VCCB and must not exceed 3.6V.
  • (3) VCCI is the supply voltage associated with the input port.

5.4 Thermal Information

| | | | | | | TXB0108 | |-------------------|-------------------------------------------------|-------|------|-------|------|---------|-------|-----------|----------------------|-----------|------|------| | | THERMAL METRIC (1) | PW | RGY | DQS | YZP | GXY | ZXY | | NME RUK DGS RKS UNIT | | | | | | | | 20 PINS | | RθJA | Junction-to-ambient thermal resistance | 101.8 | 35.3 | 108.5 | 66.2 | 156.7 | 156.7 | 131.
4 | 56.4 | 111.
9 | 58.8 | °C/W | | Rθ
JC(top
) | Junction-to-case (top) thermal resistance | 35.5 | 42.1 | 32.3 | 0.4 | 39.9 | 39.9 | 56.5 | 59.1 | 51.5 | 63.9 | °C/W | | RθJB | Junction-to-board thermal resistance | 52.8 | 11.1 | 42.4 | 52.0 | 85.9 | 85.9 | 83.2 | 30.5 | 67 | 31.6 | °C/W | | ψJT | Junction-to-top characterization parameter | 2.2 | 0.7 | 0.7 | 1.5 | 1.1 | 1.1 | 1.5 | 2.7 | 3.7 | 5.9 | °C/W | | ψJB | Junction-to-board characterization
parameter | 52.2 | 11.2 | 42 | 51.9 | 85.4 | 85.4 | 82.6 | 30.5 | 66.2 | 31.6 | °C/W | | Rθ
JC(bot
) | Junction-to-case (bottom) thermal
resistance | – | 3.8 | – | – | – | – | – | 15.1 | - | 15.3 | °C/W |

(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application note.

5.5 Electrical Characteristics (DGS/RUK/RKS)

over recommended operating free-air temperature range (unless otherwise noted)(1) (2)

| | | TEST | | | | TA = 25°C | | –40°C to 85°C | |-------------|-------------|----------------------|--------------|---------------|-----|-----------|-----|---------------|-----|------| | | PARAMETER | CONDITIONS | VCCA
VCCB | | MIN | TYP | MAX | MIN | MAX | UNIT | | | | | 1.2V | | | 1.1 | | VOHA | | IOH = –20μA | 1.4V to 3.6V | | | | | VCCA – 0.4 | | V | | | | | 1.2V | | | 0.3 | | | | V | | VOLA | | IOL = 20μA | 1.4V to 3.6V | | | | | | 0.4 | | VOHB | | IOH = –20 μA | | 1.65V to 5.5V | | | | VCCB – 0.4 | | V | | VOLB | | IOL = 20μA | | 1.65V to 5.5V | | | | | 0.4 | V | | II | OE | | 1.2V to 3.6V | 1.65V to 5.5V | | | ±1 | | ±2 | μA | | | A port | | 0V | 0V to 5.5V | | | ±1 | | ±2 | μA | | Ioff | B port | | 0V to 3.6V | 0V | | | ±1 | | ±2 | | IOZ | A or B port | OE = GND | 1.2V to 3.6V | 1.65V to 5.5V | | | ±1 | | ±2 | μA | | | | | 1.2V | | | 0.45 | | | | VI
= VCCI or GND, | 1.4V to 3.6V | 1.65V to 5.5V | | | | | 5 | | ICCA | | IO = 0 | 3.6V | 0V | | | | | 2 | μA | | | | | 0V | 5.5V | | | | | –2 | | | | | 1.2V | | | 3.4 | | | | VI
= VCCI or GND, | 1.4V to 3.6V | 1.65V to 5.5V | | | | | 5 | | ICCB | | IO = 0 | 3.6V | 0V | | | | | –2 | μA | | | | | 0V | 5.5V | | | | | 2 | | | | VI
= VCCI or GND, | 1.2V | | | 3.5 | | ICCA + ICCB | | IO = 0 | 1.4V to 3.6V | 1.65V to 5.5V | | | | | 10 | μA |

over recommended operating free-air temperature range (unless otherwise noted)(1) (2)

| | TEST
PARAMETER | | | TA = 25°C | –40°C to 85°C | |-------|------------------------------|----------------------|--------------|---------------|-------------------|------------|------| | | | CONDITIONS | VCCA | VCCB | MIN
TYP
MAX | MIN
MAX | UNIT | | | VI
= VCCI or GND,
1.2V | | | 0.05 | | ICCZA | | IO = 0,
OE = GND | 1.4V to 3.6V | 1.65V to 5.5V | | 5 | μA | | | | VI
= VCCI or GND, | 1.2V | | 3.3 | | ICCZB | | IO = 0,
OE = GND | 1.4V to 3.6V | 1.65V to 5.5V | | 5 | μA | | CI | OE | | 1.2V to 3.6V | 1.65V to 5.5V | 5 | 6.5 | pF | | | A port | | | | 5 | 6.5 | | Cio | B port | | 1.2V to 3.6V | 1.65V to 5.5V | 8 | 13.3 | pF |

  • (1) VCCI is the supply voltage associated with the input port.
  • (2) VCCO is the supply voltage associated with the output port.

5.6 Electrical Characteristics (Other Packages)

over recommended operating free-air temperature range (unless otherwise noted)(1) (2)

| | | TEST | | | | TA = 25°C | | –40°C to 85°C | |-------------|-------------|----------------------|--------------|---------------|-----|-----------|-----|---------------|-----|------|--| | | PARAMETER | CONDITIONS | VCCA | VCCB | MIN | TYP | MAX | MIN | MAX | UNIT | | | | | 1.2V | | | 1.1 | | VOHA | | IOH = –20μA | 1.4V to 3.6V | | | | | VCCA – 0.4 | | V | | | | | 1.2V | | | 0.3 | | VOLA | | IOL = 20μA | 1.4V to 3.6V | | | | | | 0.4 | V | | VOHB | | IOH = –20μA | | 1.65V to 5.5V | | | | VCCB – 0.4 | | V | | VOLB | | IOL = 20μA | | 1.65V to 5.5V | | | | | 0.4 | V | | II | OE | | 1.2V to 3.6V | 1.65V to 5.5V | | | ±1 | | ±2 | μA | | | A port | | 0V | 0V to 5.5V | | | ±1 | | ±2 | | Ioff | B port | | 0V to 3.6V | 0V | | | ±1 | | ±2 | μA | | IOZ | A or B port | OE = GND | 1.2V to 3.6V | 1.65V to 5.5V | | | ±1 | | ±2 | μA | | | | | 1.2V | | | 0.06 | | | | VI
= VCCI or GND, | 1.4V to 3.6V | 1.65V to 5.5V | | | | | 5 | | ICCA | | IO = 0 | 3.6V | 0V | | | | | 2 | μA | | | | 0V
5.5V | | –2 | | | | | 1.2V | | | 3.4 | | | | VI
= VCCI or GND, | 1.4V to 3.6V | 1.65V to 5.5V | | | | | 5 | | ICCB | | IO = 0 | 3.6V | 0V | | | | | –2 | μA | | | | | 0V | 5.5V | | | | | 2 | | | | VI
= VCCI or GND, | 1.2V | | | 3.5 | | ICCA + ICCB | | IO = 0 | 1.4V to 3.6V | 1.65V to 5.5V | | | | | 10 | μA | | | | VI
= VCCI or GND, | 1.2V | | | 0.05 | | ICCZA | | IO = 0,
OE = GND | 1.4V to 3.6V | 1.65V to 5.5V | | | | | 5 | μA | | | | VI
= VCCI or GND, | 1.2V | | | 3.3 | | ICCZB | | IO = 0,
OE = GND | 1.4V to 3.6V | 1.65V to 5.5V | | | | | 5 | μA | | CI | OE | | 1.2V to 3.6V | 1.65V to 5.5V | | 5 | | | 5.5 | pF | | | A port | | | | | 5 | | | 6.5 | | Cio | B port | | 1.2V to 3.6V | 1.65V to 5.5V | | 8 | | | 10 | pF | (1) VCCI is the supply voltage associated with the input port.

(2) VCCO is the supply voltage associated with the output port.

Thermal Information

| | | | | | | TXB0108 | |-------------------|-------------------------------------------------|-------|------|-------|------|---------|-------|-----------|----------------------|-----------|------|------| | | THERMAL METRIC (1) | PW | RGY | DQS | YZP | GXY | ZXY | | NME RUK DGS RKS UNIT | | | | | | | | 20 PINS | | RθJA | Junction-to-ambient thermal resistance | 101.8 | 35.3 | 108.5 | 66.2 | 156.7 | 156.7 | 131.
4 | 56.4 | 111.
9 | 58.8 | °C/W | | Rθ
JC(top
) | Junction-to-case (top) thermal resistance | 35.5 | 42.1 | 32.3 | 0.4 | 39.9 | 39.9 | 56.5 | 59.1 | 51.5 | 63.9 | °C/W | | RθJB | Junction-to-board thermal resistance | 52.8 | 11.1 | 42.4 | 52.0 | 85.9 | 85.9 | 83.2 | 30.5 | 67 | 31.6 | °C/W | | ψJT | Junction-to-top characterization parameter | 2.2 | 0.7 | 0.7 | 1.5 | 1.1 | 1.1 | 1.5 | 2.7 | 3.7 | 5.9 | °C/W | | ψJB | Junction-to-board characterization
parameter | 52.2 | 11.2 | 42 | 51.9 | 85.4 | 85.4 | 82.6 | 30.5 | 66.2 | 31.6 | °C/W | | Rθ
JC(bot
) | Junction-to-case (bottom) thermal
resistance | – | 3.8 | – | – | – | – | – | 15.1 | - | 15.3 | °C/W |

(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application note.

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