Texas Instruments

TXB0108PWR - 8-Bit Bidirectional Level Shifter | TI

Name: TXB0108PWR
Brand: Texas Instruments
Price: 0.6 USD
Availability: InStock

MPN: TXB0108PWR ✓ Active

In Stock Ships in 1-3 business days

1.2 V to 3.6 V Vdss [DATA_NEEDED: quiescent current] Id 20-TSSOP (PW) Package

From $0.6 USD / Unit

MOQ: 1 |

Price updated: 2026-08-23

Volume Pricing

Qty	Unit Price	Extended
1	$1.25	$1.25
10	$1.1	$11.00
100	$0.85	$85.00
500	$0.72	$360.00
1,000	$0.6	$600.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for TXB0108PWR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

TXB0108PWRG4

✅ Drop-In

📦 20-TSSOP

Same die and package, different ordering code

📋 Reference alternative (not in catalog)

TXS0108EPWR

✅ Drop-In

📦 20-TSSOP

Supports open-drain and push-pull, lower ESD (±8kV), lower data rate (60 Mbps)

📋 Reference alternative (not in catalog)

SN74LVC8T245PWR

✅ Drop-In

Texas Instruments

📦 20-TSSOP

8 · 1.65 V to 5.5 V · 1.65 V to 5.5 V · 3-State · 3.3 ns (typical) at 3.3V · 100 Mbps · 0 V to 5.5 V · -40°C to +85°C

✓ In Stock

$0.42 / Unit

View Datasheet →

NVT2008PW

✅ Drop-In

📦 20-TSSOP

Supports open-drain and push-pull, lower data rate (20 Mbps), different ESD rating

📋 Reference alternative (not in catalog)

ℹ️ 1 cross-package part(s) hidden — different package requires PCB rework and is not a true drop-in replacement. Contact us if you need cross-package suggestions.

TXB0108PWR Maximum Ratings & Electrical Characteristics

Number of Channels	8
Circuit Type	Bidirectional
Data Rate	100 Mbps
VCCA Range	1.2 V to 3.6 V
VCCB Range	1.65 V to 5.5 V
ESD Protection	±15 kV (HBM)
Package	20-TSSOP (PW)
Operating Temperature	-40°C to 85°C
Mounting Type	Surface Mount
Number of Pins	20
Supply Current (ICC)	[DATA_NEEDED: quiescent current]
Propagation Delay	[DATA_NEEDED: propagation delay]
RoHS Status	Compliant
MSL Level	[DATA_NEEDED: MSL level]
Output Type	Push-Pull

TXB0108PWR Pin Configuration

Pin 1	VCCA — A-port supply voltage (1.2V to 3.6V)
Pin 2	A1 — A-port I/O 1
Pin 3	A2 — A-port I/O 2
Pin 4	A3 — A-port I/O 3
Pin 5	A4 — A-port I/O 4
Pin 6	A5 — A-port I/O 5
Pin 7	A6 — A-port I/O 6
Pin 8	A7 — A-port I/O 7
Pin 9	A8 — A-port I/O 8
Pin 10	GND — Ground
Pin 11	B8 — B-port I/O 8
Pin 12	B7 — B-port I/O 7
Pin 13	B6 — B-port I/O 6
Pin 14	B5 — B-port I/O 5
Pin 15	B4 — B-port I/O 4
Pin 16	B3 — B-port I/O 3
Pin 17	B2 — B-port I/O 2
Pin 18	B1 — B-port I/O 1
Pin 19	VCCB — B-port supply voltage (1.65V to 5.5V)
Pin 20	EN — Enable (active high)

Safe Operating Area (SOA) & Thermal Characteristics

No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.

Typical Applications

TXB0108PWR is suitable for 6 applications: Microcontroller Interface, SD Card Level Shifting, UART/SPI/I2C Translation, FPGA Configuration, Sensor Interfacing, IoT Devices.

🧩

Microcontroller Interface

The TXB0108PWR translates between a 1.8V or 3.3V microcontroller and 5V peripherals, enabling seamless communication. Its auto-direction sensing simplifies firmware by eliminating direction control. With 100 Mbps data rate, it supports high-speed SPI and UART links. The wide VCCA range (1.2V-3.6V) accommodates various MCU voltages, while VCCB up to 5.5V interfaces with legacy 5V logic. This makes it ideal for mixed-voltage embedded systems where multiple voltage domains coexist.

Recommended

SN74LVC8T245PWR · Texas Instruments TXS0108EPWR (Open-drain compatible alternative)

💾

SD Card Level Shifting

SD cards typically operate at 3.3V, while modern microcontrollers may use 1.8V I/O. The TXB0108PWR provides 8 channels, enough for SD card data lines (DAT0-3, CMD, CLK) and additional signals. Its 100 Mbps data rate exceeds SD card requirements, ensuring reliable high-speed communication. The auto-direction feature is particularly useful for bidirectional data lines. The ±15kV ESD protection safeguards against static discharge during card insertion, enhancing system reliability.

Recommended

SN74LVC8T245PWR · Texas Instruments

🌐

UART/SPI/I2C Translation

For UART and SPI, which use push-pull signals, the TXB0108PWR is an excellent choice due to its high speed and auto-direction sensing. It simplifies PCB layout by removing direction control lines. For I2C, which uses open-drain, the TXB0108PWR is not suitable; instead, use the TXS0108E. The device's wide voltage range supports common combinations like 1.8V to 3.3V or 3.3V to 5V. Its 100 Mbps capability ensures no bottleneck in high-speed serial communication.

Recommended

TXS0108EPWR (Open-drain compatible alternative)

🔧

FPGA Configuration

FPGAs often require level shifting between configuration devices (e.g., flash) and the FPGA I/O banks, which may operate at different voltages. The TXB0108PWR's 8 channels can handle configuration data and control signals. Its high data rate supports fast configuration times. The auto-direction feature is beneficial for bidirectional configuration interfaces. The wide voltage range accommodates various FPGA I/O standards, from 1.2V to 3.3V, ensuring compatibility with modern FPGAs.

Recommended

SN74LVC8T245PWR · Texas Instruments

🏭

Sensor Interfacing

Many sensors operate at 3.3V or 5V, while microcontrollers may use lower voltages. The TXB0108PWR translates sensor outputs to the MCU's voltage level, enabling direct connection. Its 8 channels can handle multiple sensors simultaneously. The auto-direction sensing is useful for sensors with bidirectional interfaces. The ±15kV ESD protection is critical in industrial environments where sensors may be exposed to static. The device's low propagation delay ensures real-time sensor data acquisition.

Recommended

TXS0108EPWR (Open-drain compatible alternative)

📱

IoT Devices

IoT devices often integrate components with different voltage levels, such as a 1.8V application processor and 3.3V wireless modules. The TXB0108PWR provides a compact solution for level translation in space-constrained designs. Its 20-TSSOP package is small, and the auto-direction feature reduces GPIO usage. The wide voltage range supports various IoT power domains. The 100 Mbps data rate is sufficient for most IoT communication protocols, including SPI and UART.

Recommended

SN74LVC8T245PWR · Texas Instruments

Recommended Products Summary

SN74LVC8T245PWR Texas Instruments Used in: Microcontroller Interface, SD Card Level Shifting, FPGA Configuration, IoT Devices TXS0108EPWR Open-drain compatible alternative Used in: Microcontroller Interface, UART/SPI/I2C Translation, Sensor Interfacing

What is the operating voltage range of TXB0108PWR?

The TXB0108PWR operates with VCCA from 1.2V to 3.6V and VCCB from 1.65V to 5.5V, with the constraint VCCA ≤ VCCB. According to the TI datasheet (SCES650), this allows translation between low-voltage logic (e.g., 1.8V) and higher-voltage logic (e.g., 3.3V or 5V).

What is the maximum data rate of TXB0108PWR?

The TXB0108PWR supports data rates up to 100 Mbps. This high-speed capability makes it suitable for SPI, UART, and other serial interfaces that require fast signal translation. The datasheet specifies this under typical operating conditions with push-pull drivers.

Does TXB0108PWR support auto-direction sensing?

Yes, the TXB0108PWR features auto-direction sensing, which automatically determines the direction of data flow without a direction control pin. This simplifies design by reducing GPIO usage and eliminating the need for direction control logic, as stated in the TI datasheet.

What is the ESD rating of TXB0108PWR?

The TXB0108PWR has ±15-kV ESD protection (HBM) on all pins. This high ESD rating enhances system robustness in industrial and consumer environments, reducing the risk of damage from electrostatic discharge during handling and operation.

Can TXB0108PWR be used for I2C level shifting?

The TXB0108PWR is not recommended for I2C because I2C uses open-drain signals, and the TXB0108 only supports push-pull drivers. For I2C, TI recommends the TXS0108E, which supports open-drain and push-pull. Using TXB0108 with I2C may cause improper operation.

What is the difference between TXB0108PWR and TXS0108EPWR?

The TXB0108PWR supports only push-pull signals and has higher ESD protection (±15kV), while the TXS0108EPWR supports both open-drain and push-pull signals but has lower ESD (±8kV). For open-drain applications like I2C, choose TXS0108E; for high-speed push-pull, TXB0108 is better.

Where can I buy TXB0108PWR online?

You can purchase TXB0108PWR from authorized distributors such as DigiKey, Mouser, and Octopart. As of 2026-08-24, DigiKey lists it as in stock with pricing starting at $1.25 for single units. Check current availability and pricing on their websites.

What is the price of TXB0108PWR?

As of 2026-08-24, the price of TXB0108PWR is approximately $1.25 for 1 unit, $0.85 for 100 units, and $0.60 for 1000 units, based on distributor data from DigiKey. Prices may vary by distributor and quantity.

What is the lead time for TXB0108PWR?

The lead time for TXB0108PWR is typically 1-2 weeks from major distributors like DigiKey and Mouser, as they usually stock this part. For large orders, lead time may extend to 4-6 weeks. Check with your preferred distributor for current lead times.

Is TXB0108PWR in stock?

Yes, TXB0108PWR is in stock at major distributors. As of 2026-08-24, DigiKey shows it as 'ships today' and Mouser lists it as available. Wolfchip also reports 2180 units in stock. Verify real-time stock on distributor websites.

What is the best drop-in replacement for TXB0108PWR?

The best drop-in replacement for TXB0108PWR is the TXB0108PWRG4, which is identical in function and package (20-TSSOP) but with a different ordering code. For cross-brand, the NXP NVT2008 is pin-compatible but supports open-drain, so verify compatibility. Always check the datasheet.

Can TXS0108EPWR replace TXB0108PWR?

Yes, TXS0108EPWR can replace TXB0108PWR in most applications, as it is pin-compatible and supports both open-drain and push-pull. However, TXS0108E has a lower maximum data rate (60 Mbps vs 100 Mbps) and lower ESD rating (±8kV vs ±15kV). For high-speed or high-ESD applications, TXB0108 is preferred.

Where can I download the TXB0108PWR datasheet PDF?

You can download the TXB0108PWR datasheet PDF from the TI website at https://www.ti.com/lit/ds/symlink/txb0108.pdf. It is also available on Alldatasheet and Digchip. The datasheet contains full specifications, pinout, and application information.

What are the key specifications of TXB0108PWR that engineers should know?

The TXB0108PWR is an 8-bit bidirectional voltage-level translator with auto-direction sensing, supporting 1.2V to 3.6V on the A port and 1.65V to 5.5V on the B port. It handles data rates up to 100 Mbps, has ±15-kV ESD protection, and comes in a 20-pin TSSOP package. It operates from -40°C to 85°C.

Is TXB0108PWR the same as TXB0108PWRG4?

Yes, TXB0108PWR and TXB0108PWRG4 are functionally identical. The G4 suffix indicates a different ordering code, but the electrical specifications and package are the same. Both are 8-bit bidirectional level shifters in 20-TSSOP with auto-direction sensing.

Engineering reference data for TXB0108PWR — comparison, design guidance, and compliance information.

Selection Guide

Choose TXB0108PWR when you need a high-speed (100 Mbps) bidirectional level shifter with auto-direction sensing and high ESD protection (±15kV) for push-pull signals. It is ideal for SPI, UART, and SD card interfaces. If you need open-drain support (e.g., I2C), select TXS0108EPWR instead. If you prefer explicit direction control, SN74LVC8T245PWR is a good alternative. For cost-sensitive designs with lower speed requirements, NVT2008PW may be considered, but verify pin compatibility and ESD ratings. All alternatives are in 20-TSSOP, but always check the datasheet for pinout differences.

Comparison with Alternatives

Parameter	This Product	TXB0108PWRG4	TXS0108EPWR	SN74LVC8T245PWR	NVT2008PW
Package	20-TSSOP	20-TSSOP	20-TSSOP	20-TSSOP	20-TSSOP
Brand	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	NXP Semiconductors
Data Rate	100 Mbps	100 Mbps	60 Mbps	100 Mbps	20 Mbps
Direction Control	Auto-sensing	Auto-sensing	Auto-sensing	Direction pin	Auto-sensing
Open-Drain Support	No	No	Yes	No	Yes
ESD Protection	±15 kV	±15 kV	±8 kV	±2 kV	[DATA_NEEDED]
VCCA Range	1.2V to 3.6V	1.2V to 3.6V	1.2V to 3.6V	1.2V to 3.6V	1.0V to 3.6V
VCCB Range	1.65V to 5.5V	1.65V to 5.5V	1.65V to 5.5V	1.65V to 5.5V	1.8V to 5.5V

Key Differentiators

Auto-direction sensing eliminates direction control pin (vs SN74LVC8T245PWR)
Higher ESD protection (±15kV) (vs TXS0108EPWR)
Higher data rate (100 Mbps) (vs NVT2008PW)

Design Notes

The TXB0108PWR is designed for push-pull drivers only. Do not use it with open-drain signals (e.g., I2C) without external pull-ups, as it may not drive the line correctly. For open-drain applications, use the TXS0108E. Also, ensure VCCA ≤ VCCB; violating this can cause improper operation.

Place 0.1µF decoupling capacitors close to each VCC pin (VCCA and VCCB) to minimize power supply noise. Use a ground plane to reduce impedance and improve signal integrity. Keep traces short and matched for high-speed signals to avoid reflections.

The TXB0108PWR in a 20-TSSOP package has a thermal resistance of approximately [DATA_NEEDED: theta_JA]. For typical applications with low power dissipation, no heatsinking is required. However, in high-temperature environments, ensure adequate airflow or copper area to keep junction temperature within limits.