SN74LVC8T245QPWRQ1 - 8-Bit Auto Level Shifter | Texas Instruments
MPN: SN74LVC8T245QPWRQ1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.98 | $0.98 |
| 10 | $0.88 | $8.80 |
| 100 | $0.68 | $68.00 |
| 500 | $0.55 | $275.00 |
| 1,000 | $0.44 | $440.00 |
Drop-in alternatives for SN74LVC8T245QPWRQ1 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:
SN74LVC8T245PWR
β Drop-Inβ In Stock
$0.36 / Unit
View Datasheet βSN74AVC4T245QPWRQ1
β‘ Same Packageβ In Stock
$0.85 / Unit
View Datasheet βTXB0108QPWRQ1
β‘ Same Packageβ In Stock
$0.68 / Unit
View Datasheet βTXS0108EQPWRQ1
β‘ Same Packageβ In Stock
$0.39 / Unit
View Datasheet β74LVC8T245PW,118
β Drop-Inπ Reference alternative (not in catalog)
SN74LVC8T245QPWRQ1 Maximum Ratings & Electrical Characteristics
| Function | 8-bit dual-supply bus transceiver with configurable voltage translation |
| Bits per Element | 8 |
| Output Type | 3-State |
| VCCA Supply Voltage Range | 1.65 V to 5.5 V |
| VCCB Supply Voltage Range | 1.65 V to 5.5 V |
| Input Tolerance | Inputs accept voltages to 5.5 V |
| Control Pins Supply | DIR and OE referenced to VCCA |
| Ioff / Power-Up 3-State | Yes, supports hot insertion |
| Automotive Qualification | AEC-Q100 qualified |
| Operating Temperature | -40C to +125C |
| Package | 24-TSSOP (PW) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (T/R) |
| Family | LVC (Widebus+) |
| Mixed-Mode Signal Operation | Supported on all ports (5-V input/output) |
| RoHS Status | Compliant |
SN74LVC8T245QPWRQ1 Pin Configuration
| Pin 1 | VCCA β A-port supply, 1.65V to 5.5V |
| Pin 2 | DIR β Direction control (VCCA-referenced) |
| Pin 3 | A1 β A-port data 1 |
| Pin 4 | A2 β A-port data 2 |
| Pin 5 | A3 β A-port data 3 |
| Pin 6 | A4 β A-port data 4 |
| Pin 7 | A5 β A-port data 5 |
| Pin 8 | A6 β A-port data 6 |
| Pin 9 | A7 β A-port data 7 |
| Pin 10 | A8 β A-port data 8 |
| Pin 11 | GND β Ground |
| Pin 12 | B8 β B-port data 8 |
| Pin 13 | B7 β B-port data 7 |
| Pin 14 | B6 β B-port data 6 |
| Pin 15 | B5 β B-port data 5 |
| Pin 16 | B4 β B-port data 4 |
| Pin 17 | B3 β B-port data 3 |
| Pin 18 | B2 β B-port data 2 |
| Pin 19 | B1 β B-port data 1 |
| Pin 20 | VCCB β B-port supply, 1.65V to 5.5V |
| Pin 21 | OE β Output enable, active high (VCCA-referenced) |
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
SN74LVC8T245QPWRQ1 is suitable for 6 applications: Automotive Body and Gateway ECU Level Shifting, MCU to 5V Sensor and Peripheral Interface, Infotainment Display and Module Backplane, Battery Management System Communication, Industrial Field I/O and PLC Modules, ADAS Camera and Radar Module Control.
Automotive Body and Gateway ECU Level Shifting
In automotive body control and gateway ECUs, MCUs such as TI's TMS320F2800152-Q1 or S32K controllers run at 3.3V while CAN/LIN transceivers and switches often expect 5V logic. The SN74LVC8T245QPWRQ1's AEC-Q100 qualification (-40C to +125C) and 1.65V-5.5V independent rails make it the standard translation element. DIR and OE referenced to VCCA allow one GPIO to control bus direction during diagnostics, while 3-state outputs release the bus during flash programming. Ioff protection prevents back-feed damage during partial power-up of ECU zones.
Recommended
MCU to 5V Sensor and Peripheral Interface
Industrial PLC and automotive sensor modules frequently pair a 3.3V MCU with 5V digital sensors, encoders, and actuators. The SN74LVC8T245QPWRQ1 translates in both directions on a shared 8-bit bus with VCCA at 3.3V and VCCB at 5V. Its 5.5V-tolerant inputs and mixed-mode operation on all ports let A-side signals coexist with 5V bus activity. The 3-state outputs permit multiple transceivers to time-share one sensor bus, and OE gating prevents contention during sensor hot-plug events, protecting both the MCU and sensor front ends.
Recommended
Infotainment Display and Module Backplane
Head-unit and display modules connect 1.8V or 3.3V processors to 3.3V/5V backplane signals such as panel control, backlight PWM, and rotation/lock lines. The SN74LVC8T245QPWRQ1 handles this with configurable translation per rail pair and hot-insertion safety from power-up 3-state and Ioff features, important for modules serviced in the field. With 8 bits per package and the Widebus+ footprint, designers cover a full control word per device; DIR control supports switching the control word between MCU-driven and display-controller-driven ownership during boot handshakes.
Recommended
Battery Management System Communication
Battery management packs isolate the pack-side controller from the vehicle-side bus, and level translation bridges different logic domains around isolation barriers and contactor drivers. The SN74LVC8T245QPWRQ1 translates MCU GPIO at 3.3V to 5V logic feeding alert/flag lines and isolation-device control inputs. Its -40C to +125C AEC-Q100 range matches under-hood and pack-adjacent environments, and the 3-state outputs let the pack controller release communication lines during sleep, minimizing quiescent draw on the low-voltage battery. OE sequencing aligns with the BQ76952Q-Q1 pack monitor's state machine.
Recommended
Industrial Field I/O and PLC Modules
PLC digital I/O cards historically standardize on 5V logic while modern controller ASICs run at 1.8V-3.3V. The SN74LVC8T245QPWRQ1 forms the domain bridge on each card, translating 8 signals with direction under CPU control. Its robust push-pull drive easily sources or sinks field-logic inputs including optocoupler LED banks, unlike weak auto-directional translators. Because the part supports independent rail ordering, retrofit cards mixing legacy 5V backplanes with 3.3V microcontrollers use one device per channel group. Hot-insertion support allows card replacement under backplane power without latch-up risk.
Recommended
ADAS Camera and Radar Module Control
ADAS sensor modules pair low-voltage image/radar processors with 3.3V or 5V actuator and status logic - lens drivers, heater controls, and fault flags. The SN74LVC8T245QPWRQ1 bridges these domains with defined direction control, letting the safety MCU assert control words during mode changes. AEC-Q100 Grade 1 temperature coverage (-40C to +125C) suits windshield-mounted camera enclosures exposed to solar heating. The 3-state outputs and power-up 3-state behavior keep the shared fault bus tri-stated during sensor power cycling, preventing false fault reporting while rails settle.
Recommended
Recommended Products Summary
Engineering reference data for SN74LVC8T245QPWRQ1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN74LVC8T245PWR | TXB0108QPWRQ1 | TXS0108EQPWRQ1 | SN74AVC4T245QPWRQ1 | 74LVC8T245PW,118 |
|---|---|---|---|---|---|---|
| Package | 24-TSSOP (PW) | 24-TSSOP (PW) - same | 24-TSSOP (PW) - same | 24-TSSOP (PW) - same | 24-TSSOP (PW) - same | 24-TSSOP (PW) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Nexperia |
| Bit Width | 8 | 8 | 8 | 8 | 4 | 8 |
| Direction Control | DIR pin (VCCA-referenced) | DIR pin - same | Auto-direction | Auto-direction | DIR or auto | DIR pin |
| Supply Range (per rail) | 1.65V to 5.5V | 1.65V to 5.5V | 1.2V to 3.6V | 1.65V to 3.6V | 1.2V to 3.6V | 1.2V to 5.5V |
| Automotive AEC-Q100 | Yes (-40C to +125C) | No | Yes | Yes | Yes | No |
| Output Drive | Full push-pull LVC drive (approx 24 mA) | Same | Weak (approx 1.2 mA auto drive) | Weak (open-drain style) | Strong AVC drive | Full push-pull LVC drive |
| Hot Insertion / Ioff | Yes | Yes | Partial | Partial | Yes | Yes |
| Price (1 pc, as of 2026-08-29) | $0.98 | $0.75 | $1.20 | $1.10 | $1.35 | [DATA_NEEDED] |
Key Differentiators
- Strong push-pull bus drive with explicit direction control (vs TXB0108QPWRQ1)
- Automotive AEC-Q100 qualification with PPAP support (vs SN74LVC8T245PWR)
- Wider 1.65V-5.5V per-rail range than auto-direction families (vs TXS0108EQPWRQ1)
Design Notes
Power up VCCA before VCCB where possible: DIR and OE are referenced to VCCA, so an unpowered VCCA leaves direction and output-enable undefined relative to the B bus. A pull-down or pull-up resistor on OE (typically 10 kOhm) guarantees outputs stay tri-stated until the MCU actively enables the transceiver, which is essential for automotive modules where rails power up in arbitrary order during key-off/load-dump events.
Place 0.1 uF ceramic decoupling capacitors within 2 mm of both VCCA (pin 1) and VCCB (pin 20) to their respective ground returns. The 24-TSSOP pinout intentionally splits A-side and B-side pins around the center ground, so route A-bus traces away from B-bus traces to reduce crosstalk at 5V swing edges and to preserve clean separation of voltage domains on mixed-level layouts.
Do not substitute auto-directional translators (TXB0108QPWRQ1, TXS0108EQPWRQ1) in designs that rely on push-pull drive into capacitive or LED loads - their weak internal drive causes stuck levels and oscillation. Conversely, do not leave the DIR pin floating; both ports can be driven simultaneously, causing shoot-through currents on the bus. Verify 5.5V rail exposure against input tolerance in load-dump conditions.
Compliance Information
AEC-Q100 automotive qualified per TI product page for SN74LVC8T245-Q1. RoHS status per standard TI catalog part; verify REACH and halogen-free status on TI quality pages.
