SN74LVC8T245PWR - 8-Bit Dual-Supply Bus Transceiver | TI
MPN: SN74LVC8T245PWR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.85 | $0.85 |
| 10 | $0.72 | $7.20 |
| 100 | $0.58 | $58.00 |
| 500 | $0.49 | $245.00 |
| 1,000 | $0.42 | $420.00 |
Drop-in alternatives for SN74LVC8T245PWR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
SN74LVC8T245PW
β Drop-Inπ Reference alternative (not in catalog)
SN74LVC8T245PWRG4
β Drop-Inπ Reference alternative (not in catalog)
SN74LVC8T245PWRQ1
β Drop-Inπ Reference alternative (not in catalog)
SN74AVC8T245PWR
β Drop-Inπ Reference alternative (not in catalog)
74LVC8T245PW
β Drop-Inπ Reference alternative (not in catalog)
74AVC8T245PW
β Drop-Inπ Reference alternative (not in catalog)
SN74LVC8T245PWR Maximum Ratings & Electrical Characteristics
| Number of Channels | 8 |
| Supply Voltage (VCCA) | 1.65 V to 5.5 V |
| Supply Voltage (VCCB) | 1.65 V to 5.5 V |
| Output Type | 3-State |
| Propagation Delay Time (tpd) | 3.3 ns (typical) at 3.3V |
| Maximum Data Rate | 100 Mbps |
| Input/Output Voltage Range | 0 V to 5.5 V |
| Operating Temperature Range | -40Β°C to +85Β°C |
| Package Type | TSSOP-24 (PW) |
| Mounting Style | Surface Mount |
| Number of Pins | 24 |
| RoHS Status | Compliant |
| Ioff Support | Yes |
| Power-Up 3-State | Yes |
| ESD Protection | 2 kV HBM |
SN74LVC8T245PWR Pin Configuration
| Pin 1 | VCCA β Supply voltage for Port A |
| Pin 2 | 1A1 β Port A data input/output 1 |
| Pin 3 | 1A2 β Port A data input/output 2 |
| Pin 4 | 1A3 β Port A data input/output 3 |
| Pin 5 | 1A4 β Port A data input/output 4 |
| Pin 6 | 1A5 β Port A data input/output 5 |
| Pin 7 | 1A6 β Port A data input/output 6 |
| Pin 8 | 1A7 β Port A data input/output 7 |
| Pin 9 | 1A8 β Port A data input/output 8 |
| Pin 10 | GND β Ground |
| Pin 11 | DIR β Direction control (referenced to VCCA) |
| Pin 12 | OE β Output enable (active low, referenced to VCCA) |
| Pin 13 | 2B8 β Port B data input/output 8 |
| Pin 14 | 2B7 β Port B data input/output 7 |
| Pin 15 | 2B6 β Port B data input/output 6 |
| Pin 16 | 2B5 β Port B data input/output 5 |
| Pin 17 | 2B4 β Port B data input/output 4 |
| Pin 18 | 2B3 β Port B data input/output 3 |
| Pin 19 | 2B2 β Port B data input/output 2 |
| Pin 20 | 2B1 β Port B data input/output 1 |
| Pin 21 | VCCB β Supply voltage for Port B |
| Pin 22 | NC β No connect |
| Pin 23 | NC β No connect |
| Pin 24 | NC β No connect |
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
SN74LVC8T245PWR is suitable for 6 applications: Level Shifting for SD Card Interfaces, FPGA I/O Voltage Translation, Industrial Sensor Interfacing, Automotive Body Electronics, Consumer Electronics Display Interfaces, Networking Equipment.
Level Shifting for SD Card Interfaces
The SN74LVC8T245PWR is ideal for level shifting between a 3.3V microcontroller and a 1.8V SD card. With VCCA at 3.3V and VCCB at 1.8V, the device translates data and command signals bidirectionally, ensuring reliable communication. The 100 Mbps data rate supports high-speed SD modes, and the 3-state outputs allow bus sharing with other peripherals. The Ioff feature prevents backflow current when the SD card is powered down, protecting the host controller.
Recommended
FPGA I/O Voltage Translation
In FPGA designs, the SN74LVC8T245PWR translates between different I/O bank voltages, such as 2.5V and 3.3V. The dual-supply architecture allows each port to be referenced to its respective bank voltage, enabling seamless integration with mixed-voltage peripherals. The device's high-speed operation (100 Mbps) supports parallel buses and high-speed serial interfaces. The OE pin can be used to tri-state the bus during FPGA configuration, preventing contention.
Recommended
Industrial Sensor Interfacing
The SN74LVC8T245PWR is used to interface 5V industrial sensors with 3.3V microcontrollers. With VCCA at 3.3V and VCCB at 5V, the device translates sensor outputs to the MCU's logic levels. The wide operating temperature range (-40Β°C to +85Β°C) makes it suitable for harsh industrial environments. The 3-state outputs allow multiple sensors to share a common data bus, reducing wiring complexity.
Recommended
Automotive Body Electronics
In automotive body electronics, the SN74LVC8T245PWR translates between 3.3V and 5V domains in control modules. The device's Ioff and power-up 3-state features ensure safe operation during battery disconnect and reconnection. The AEC-Q100 qualified variant (SN74LVC8T245PWRQ1) is available for automotive applications requiring formal qualification. The 100 Mbps data rate supports CAN transceiver interfaces and other high-speed communication links.
Recommended
Consumer Electronics Display Interfaces
The SN74LVC8T245PWR is used in consumer electronics to translate between application processor I/O (1.8V) and display driver ICs (3.3V). The device supports high-speed data rates required for display configuration interfaces like SPI and DSI. The small TSSOP-24 package is ideal for space-constrained designs. The 3-state outputs allow the display bus to be shared with other peripherals, reducing pin count.
Recommended
Networking Equipment
In networking equipment, the SN74LVC8T245PWR translates between 2.5V and 3.3V logic in switch and router designs. The device's high-speed operation supports management interfaces and status LEDs. The dual-supply design allows independent voltage domains for different sections of the board. The Ioff feature is critical for hot-swappable line cards, preventing backflow current during insertion and removal.
Recommended
Recommended Products Summary
Engineering reference data for SN74LVC8T245PWR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN74LVC8T245PW | SN74LVC8T245PWRG4 | SN74LVC8T245PWRQ1 | SN74AVC8T245PWR | 74LVC8T245PW | 74AVC8T245PW |
|---|---|---|---|---|---|---|---|
| Package | TSSOP-24 (PW) | TSSOP-24 (PW) | TSSOP-24 (PW) | TSSOP-24 (PW) | TSSOP-24 (PW) | TSSOP-24 (PW) | TSSOP-24 (PW) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | NXP Semiconductors | NXP Semiconductors |
| Supply Voltage Range | 1.65V to 5.5V | 1.65V to 5.5V | 1.65V to 5.5V | 1.65V to 5.5V | 1.2V to 3.6V | 1.65V to 5.5V | 1.2V to 3.6V |
| Propagation Delay (tpd) | 3.3 ns (typ) | 3.3 ns (typ) | 3.3 ns (typ) | 3.3 ns (typ) | 2.5 ns (typ) | 3.3 ns (typ) | 2.5 ns (typ) |
| Maximum Data Rate | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps | 200 Mbps | 100 Mbps | 200 Mbps |
| Automotive Grade | No | No | No | Yes (AEC-Q100) | No | No | No |
| Ioff Support | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Technology | LVC | LVC | LVC | LVC | AVC | LVC | AVC |
Key Differentiators
- Wide supply voltage range on both rails (vs SN74AVC8T245PWR)
- Automotive grade option available (vs SN74LVC8T245PW)
- Ioff and power-up 3-state support (vs 74LVC8T245PW)
Design Notes
Ensure both VCCA and VCCB are powered and within the specified range (1.65V to 5.5V). The device does not require a specific power-up sequence, but it is recommended to power VCCA first to ensure control pins (DIR, OE) are properly referenced. Use 0.1uF decoupling capacitors close to each supply pin to minimize noise.
Place the SN74LVC8T245PWR close to the connector or device it interfaces with to minimize trace lengths and reduce signal integrity issues. Use controlled impedance traces for high-speed signals (above 50 MHz). Ensure a solid ground plane beneath the device to provide a low-inductance return path.
Do not apply voltages to the I/O pins when the corresponding supply rail is off, as this can cause latch-up or damage. The Ioff feature helps prevent backflow current, but it is still good practice to ensure power is applied before signals. Also, avoid floating the OE pin; tie it to GND to enable outputs or to VCCA to disable them.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified; choose SN74LVC8T245PWRQ1 for automotive.
