SN74LVC8T245PWR - 8-Bit Dual-Supply Level Translator | TI
MPN: SN74LVC8T245PWR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.98 | $0.98 |
| 10 | $0.89 | $8.90 |
| 100 | $0.72 | $72.00 |
| 500 | $0.58 | $290.00 |
| 1,000 | $0.47 | $470.00 |
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)
SN74AVC8T245PW
β Drop-Inπ Reference alternative (not in catalog)
TXS0108EPWR
β‘ Same Packageβ In Stock
$0.74 / Unit
View Datasheet β74LVC8T245PW
β Drop-Inπ Reference alternative (not in catalog)
74AVC8T245PW
β Drop-Inπ Reference alternative (not in catalog)
SN74LVC8T245PWR Maximum Ratings & Electrical Characteristics
| Logic Function | 8-bit dual-supply bus transceiver, non-inverting |
| Bits per Element | 8 |
| VCCA Supply Range | 1.65 V to 5.5 V |
| VCCB Supply Range | 1.65 V to 5.5 V |
| Output Type | 3-State |
| Direction Control | DIR (referenced to VCCA) |
| Output Enable | OE (referenced to VCCA) |
| Ioff Support | Yes (partial power-down protection) |
| Power-Up 3-State | Yes |
| Typical Data Rate | 100 Mbps |
| Operating Temperature | -40C to +85C |
| Package | TSSOP-24 (PW) |
| Mounting Type | Surface Mount |
| Family | LVC (Widebus+) |
| RoHS Status | Compliant |
| Features | Configurable voltage translation, mixed-mode signal operation on all ports |
SN74LVC8T245PWR Pin Configuration
| Pin 1 | DIR β Direction control input (referenced to VCCA) |
| Pin 2 | A1 β Port A data bit 1 |
| Pin 3 | A2 β Port A data bit 2 |
| Pin 4 | A3 β Port A data bit 3 |
| Pin 5 | A4 β Port A data bit 4 |
| Pin 6 | A5 β Port A data bit 5 |
| Pin 7 | A6 β Port A data bit 6 |
| Pin 8 | A7 β Port A data bit 7 |
| Pin 9 | A8 β Port A data bit 8 |
| Pin 10 | GND β Ground |
| Pin 11 | B8 β Port B data bit 8 |
| Pin 12 | B7 β Port B data bit 7 |
| Pin 13 | VCCB β Port B supply, 1.65 V to 5.5 V |
| Pin 14 | B6 β Port B data bit 6 |
| Pin 15 | B5 β Port B data bit 5 |
| Pin 16 | B4 β Port B data bit 4 |
| Pin 17 | B3 β Port B data bit 3 |
| Pin 18 | B2 β Port B data bit 2 |
| Pin 19 | B1 β Port B data bit 1 |
| Pin 20 | NC β No connect |
| Pin 21 | NC β No connect |
| Pin 22 | NC β No connect |
| Pin 23 | OE β Output enable (referenced to VCCA); 3-state when inactive |
| Pin 24 | VCCA β Port A supply, 1.65 V to 5.5 V |
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: MCU to 5V Peripheral Interface, SD and SIM Card Interfaces, FPGA and CPLD I/O Bank Level Adaptation, Industrial Control and PLC I/O, Memory Module and Sensor Bus Translation, Consumer and Automotive Mixed-Voltage Boards.
MCU to 5V Peripheral Interface
When a 3.3V or 1.8V microcontroller must drive legacy 5V logic, the SN74LVC8T245PWR bridges the domains with its configurable 1.65V-5.5V rails: set VCCA to the MCU rail and VCCB to 5V. The LVC push-pull drivers source and sink meaningful current, sustaining roughly 100 Mbps data rates for SPI, parallel address/data, or general-purpose I/O expansion. DIR provides clean turnaround control, and 3-state outputs let multiple masters share the peripheral bus without contention.
Recommended
SD and SIM Card Interfaces
SD and SIM card controllers frequently run at 1.8V or 3.0V while the host bus is 3.3V or 5V. The SN74LVC8T245PWR translates the 4-bit SD data, command, and clock lines bidirectionally with its dual rails, and the power-up 3-state feature keeps the card bus high impedance while rails stabilize during card insertion. According to TI datasheet SN74LVC8T245, Ioff protection blocks backflow current when the card is unpowered, protecting both host and card.
Recommended
FPGA and CPLD I/O Bank Level Adaptation
FPGA banks often operate at 1.8V or 2.5V while external memory, LEDs, or industrial drivers need 3.3V or 5V. The SN74LVC8T245PWR ties VCCA to the bank rail and VCCB to the external rail, translating full 8-bit ports with matched propagation delay across bits. The ~100 Mbps capability covers most memory-mapped and parallel peripheral interfaces, and the OE pin lets the FPGA tri-state the bus during configuration when I/O states are undefined.
Recommended
Industrial Control and PLC I/O
Industrial controllers mix 5V field logic with modern 3.3V processors. The SN74LVC8T245PWR withstands the industrial -40C to +85C ambient range and provides robust LVC drive for optocoupler LEDs, relay-driver inputs, and 5V encoder signals. DIR and OE give deterministic bus direction for hot-socketed I/O cards, while Ioff support allows cards to be removed or inserted without backpowering the backplane through the transceiver I/O pins.
Recommended
Memory Module and Sensor Bus Translation
Parallel memory, ADCs, and digital sensors frequently specify 2.5V or 1.8V interfaces while the system logic runs at 3.3V. The SN74LVC8T245PWR handles the full byte-wide address/data bus with 3-state outputs for shared access, and the DIR control supports read/write turnaround of bidirectional data lines. Its low-impedance outputs preserve timing margins against 15 pF typical load capacitance noted in the TI datasheet, keeping setup and hold budgets intact.
Recommended
Consumer and Automotive Mixed-Voltage Boards
Display, audio, and connectivity boards combine 5V power-management signals with 1.8V digital cores. The SN74LVC8T245PWR provides inexpensive byte-wide translation for UART, SPI, and general control signals between these domains. For automotive deployments, pair it with TI's AEC-Q100 qualified MCUs and CAN transceivers; the transceiver's power-up 3-state output prevents glitching of downstream circuits while the various board rails sequence at power-on.
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 | TXS0108EPWR | 74LVC8T245PW | SN74AVC8T245PW |
|---|---|---|---|---|---|
| Package | TSSOP-24 (PW) | TSSOP-24 (PW) - same | TSSOP-24 (PW) - same | TSSOP-24 (PW) - same | TSSOP-24 (PW) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | NXP Semiconductors | Texas Instruments |
| Bits | 8 | 8 | 8 | 8 | 8 |
| Supply Range | 1.65 V to 5.5 V per rail | 1.65 V to 5.5 V per rail | 1.65 V to 3.6 V per rail | 1.2 V to 5.5 V per rail | 1.4 V to 3.6 V per rail |
| Direction Control | DIR + OE (explicit) | DIR + OE (explicit) | Auto-direction sensing | DIR + OE (explicit) | DIR + OE (explicit) |
| Output Structure | Push-pull, 3-state | Push-pull, 3-state | Open-drain style with 10 kOhm pull-ups | Push-pull, 3-state | Push-pull, 3-state |
| Typical Data Rate | ~100 Mbps | ~100 Mbps | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Ioff / Power-Up 3-State | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes |
| Price (1 pc, as of 2026-08-29) | $0.98 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Explicit DIR/OE direction control (vs TXS0108EPWR)
- Wider standard supply range than AVC alternatives (vs SN74AVC8T245PW)
- Lower cost than AVC-grade equivalents (vs 74AVC8T245PW)
Design Notes
Place a 0.1uF ceramic decoupling capacitor on each supply rail (VCCA pin 24 and VCCB pin 13) within 2 mm of the pins, with a solid ground via to the GND plane at pin 10. Because the two rails are independent, each can see transient currents independently during direction switching; local decoupling prevents VCCA droop from propagating into the DIR/OE threshold behavior described in TI datasheet SN74LVC8T245.
Never allow both ports to drive the same external bus simultaneously: DIR changes direction while OE is asserted and the opposite side is driven will cause shoot-through contention currents. The standard safe sequence is deassert OE (3-state), change DIR, then reassert OE. Also remember DIR and OE are referenced to VCCA - if VCCA is unpowered while VCCB is live, Ioff protects the I/O but control inputs should still be held at valid VCCA-referenced levels.
For long bus runs or heavy loads near the 15 pF typical load noted in the TI datasheet, add 22-33 ohm series resistors at the B-side outputs when translating up to 5V to control overshoot and ringing. Keep trace stubs short and match bit-to-bit trace lengths on parallel data buses to preserve the ~100 Mbps timing margin; the LVC output edge rates are fast enough that unterminated stubs over ~5 cm can cause reflections.
Compliance Information
RoHS compliant per TI product page and DigiKey listing. Standard commercial/industrial part, not an AEC-Q100 automotive-qualified variant. REACH and conflict-minerals declarations available on ti.com.
