Specifications
| Type | Description |
|---|---|
| Part Number | SN74AVC2T245_Bus |
| Manufacturer | Texas Instruments |
| Product Type | I2C Switch |
| Category | Signal Chain |
| Package / Case | RSW UQFN-10, 1.80 mm × 1.40 mm body |
| Function | Dual-bit noninverting dual-supply bus transceiver with configurable level shifting and tri-state outputs; general device description; source page 1 |
| Supply Voltage Range VCCA | 1.2 V to 3.6 V; recommended operating conditions; source page 4 |
| Supply Voltage Range VCCB | 1.2 V to 3.6 V; recommended operating conditions; source page 4 |
| Absolute Maximum Supply Voltage | -0.5 V to 4.6 V; VCCA or VCCB, absolute maximum ratings; source page 4 |
| I/O Tolerance | 4.6 V tolerant; A-port and B-port I/Os; source page 1 |
| Input Voltage Range | 0 V to 3.6 V; recommended operating conditions; source page 5 |
| High-Level Input Voltage VIH | 0.65 × VCCI min; data inputs, VCCI = 1.2 V to 1.95 V; source page 4 |
| High-Level Input Voltage VIH | 1.6 V min; data inputs, VCCI = 1.95 V to 2.7 V; source page 4 |
| High-Level Input Voltage VIH | 2 V min; data inputs, VCCI = 2.7 V to 3.6 V; source page 4 |
| Low-Level Input Voltage VIL | 0.35 × VCCI max; data inputs, VCCI = 1.2 V to 1.95 V; source page 4 |
| Low-Level Input Voltage VIL | 0.7 V max; data inputs, VCCI = 1.95 V to 2.7 V; source page 4 |
| Low-Level Input Voltage VIL | 0.8 V max; data inputs, VCCI = 2.7 V to 3.6 V; source page 4 |
| DIR Input Reference | Referenced to VCCA; DIR1 and DIR2 control inputs; source page 3 |
| OE Input Reference | Referenced to VCCA; tri-state output-mode enable input; source page 3 |
| Output Voltage Range | 0 V to VCCO; active state; source page 5 |
| Output Voltage Range | 0 V to 3.6 V; 3-state output condition; source page 5 |
| High-Level Output Current IOH | -3 mA to -12 mA; recommended operating range across VCCO = 1.1 V to 3.6 V; source page 5 |
| Low-Level Output Current IOL | 3 mA to 12 mA; recommended operating range across VCCO = 1.1 V to 3.6 V; source page 5 |
| Input Transition Rise or Fall Rate | 5 ns/V max; recommended operating conditions; source page 5 |
| Operating Free-Air Temperature | -40 °C to 85 °C; recommended operating conditions; source page 5 |
| Storage Temperature Range | -65 °C to 150 °C; absolute maximum ratings; source page 4 |
| Junction Temperature | -40 °C to 150 °C; absolute maximum ratings; source page 4 |
| Continuous Output Current | ±50 mA; absolute maximum ratings; source page 4 |
| Continuous Supply or Ground Current | ±100 mA; through VCCA, VCCB, or GND; source page 4 |
| Input Clamp Current IIK | -50 mA; VI < 0 V; source page 4 |
| Output Clamp Current IOK | -50 mA; VO < 0 V; source page 4 |
| Human Body Model ESD Rating | 5000 V; per ANSI/ESDA/JEDEC JS-001; source page 4 |
| Charged Device Model ESD Rating | 1500 V; per JEDEC JESD22-C101; source page 4 |
| Machine Model ESD Rating | 200 V; per JESD 22 A115-A, features list; source page 1 |
| Maximum Data Rate | 500 Mbps; 1.8 V to 3.3 V level shifting; source page 1 |
| Maximum Data Rate | 320 Mbps; <1.8 V to 3.3 V level shifting; source page 1 |
| Maximum Data Rate | 320 Mbps; translation to 2.5 V or 1.8 V; source page 1 |
| Maximum Data Rate | 280 Mbps; translation to 1.5 V; source page 1 |
| Maximum Data Rate | 240 Mbps; translation to 1.2 V; source page 1 |
| VOH | VCCO - 0.2 V min; IOH = -100 µA, VCCA = 1.2 V to 3.6 V, VCCB = 1.2 V to 3.6 V, VI = VIH; source page 6 |
| VOL | 0.2 V max; IOL = 100 µA, VCCA = 1.2 V to 3.6 V, VCCB = 1.2 V to 3.6 V, VI = VIL; source page 6 |
| Control Input Leakage Current II | ±0.025 µA typ, ±0.25 µA max at 25 °C, ±1 µA max over temperature; VI = VCCA or GND, VCCA = 1.2 V to 3.6 V, VCCB = 1.2 V to 3.6 V; source page 6 |
| Power-Off Leakage Current Ioff | ±0.1 µA typ, ±1 µA max at 25 °C, ±5 µA max over temperature; A or B port, VI or VO = 0 V to 3.6 V, one supply at 0 V; source page 6 |
| 3-State Output Leakage IOZ | ±0.5 µA typ, ±2.5 µA max at 25 °C, ±5 µA max over temperature; A or B port, VO = VCCO or GND, VI = VCCI or GND, OE = VIH, VCCA = 3.6 V, VCCB = 3.6 V; source page 6 |
| ICC Total Supply Current | 16 µA max; ICCA + ICCB, VI = VCCI or GND, IO = 0, VCCA = 1.2 V to 3.6 V, VCCB = 1.2 V to 3.6 V; source page 6 |
| Control Input Capacitance | 3.5 pF typ, 4.5 pF max; VI = 3.3 V or GND, VCCA = 3.3 V, VCCB = 3.3 V; source page 6 |
| I/O Port Capacitance | 6 pF typ, 7 pF max; VO = 3.3 V or GND, VCCA = 3.3 V, VCCB = 3.3 V; source page 6 |
| Thermal Resistance Junction-to-Ambient | 227.4 °C/W; RSW UQFN-10 package; source page 5 |
| Thermal Resistance Junction-to-Case Top | 96.3 °C/W; RSW UQFN-10 package; source page 5 |
| Thermal Resistance Junction-to-Board | 139.6 °C/W; RSW UQFN-10 package; source page 5 |
| Propagation Delay tPLH/tPHL | 1.9 ns typ; A to B, VCCA = 1.2 V, VCCB = 3.3 V ± 0.3 V; source page 7 |
| Propagation Delay tPLH/tPHL | 1.7 ns typ; B to A, VCCA = 1.2 V, VCCB = 3.3 V ± 0.3 V; source page 7 |
| Propagation Delay tPLH/tPHL | 0.1 ns min, 3.9 ns max; A to B, VCCA = 1.5 V ± 0.1 V, VCCB = 3.3 V ± 0.3 V; source page 7 |
| Output Enable Delay tPZH/tPZL | 0.1 ns min, 6.4 ns max; OE to A, VCCA = 1.5 V ± 0.1 V, VCCB = 3.3 V ± 0.3 V; source page 7 |
| Output Disable Delay tPHZ/tPLZ | 1 ns min, 7.4 ns max; OE to A, VCCA = 1.5 V ± 0.1 V, VCCB = 3.3 V ± 0.3 V; source page 7 |
| Partial-Power-Down Support | Ioff circuitry disables outputs to prevent damaging current backflow; powered-down operation; source page 1 |
| VCC Isolation | Both ports high-impedance if either VCC input is at GND; VCCA or VCCB at GND; source page 1 |
| Latch-Up Performance | Exceeds 100 mA; per JESD 78, Class II; source page 1 |
| Datasheet Status | request_only |
Product Overview
The SN74AVC2T245_Bus is a Texas Instruments dual-bit noninverting dual-supply bus transceiver for interface level shifting between two voltage domains. VCCA and VCCB are each specified over a 1.2 V to 3.6 V recommended operating range, while the A-port and B-port I/Os are 4.6 V tolerant. Direction control through DIR1 and DIR2 and output-enable control through OE are referenced to VCCA.
The device supports active output levels from 0 V to VCCO and a 3-state output voltage range from 0 V to 3.6 V. Recommended output drive spans -3 mA to -12 mA for IOH and 3 mA to 12 mA for IOL across VCCO from 1.1 V to 3.6 V. Level-shifting throughput is specified up to 500 Mbps for 1.8 V to 3.3 V translation, with additional data-rate limits for lower translation voltages.
The RSW UQFN-10 package uses a 1.80 mm × 1.40 mm body. Thermal data includes 227.4 °C/W junction-to-ambient resistance, 96.3 °C/W junction-to-case-top resistance, and 139.6 °C/W junction-to-board resistance. The part is specified for -40 °C to 85 °C operating free-air temperature and includes Ioff partial-power-down support and VCC isolation behavior.
Key Features
- Dual-bit noninverting dual-supply bus transceiver
- Configurable level shifting with tri-state outputs
- VCCA and VCCB each support 1.2 V to 3.6 V
- A-port and B-port I/Os are 4.6 V tolerant
- Up to 500 Mbps for 1.8 V to 3.3 V translation
- Ioff circuitry supports partial-power-down operation
- Both ports high-impedance when either supply is grounded
- 5000 V HBM and 1500 V CDM ESD ratings
- RSW UQFN-10 package, 1.80 mm × 1.40 mm body
- -40 °C to 85 °C operating free-air temperature
Typical Applications
- Dual-supply logic level translation
- Bidirectional two-bit bus interfaces
- 1.2 V to 3.6 V voltage domains
- Tri-state bus isolation
- Partial-power-down interface paths
- Compact UQFN interface assemblies
- High-speed 1.8 V to 3.3 V translation
Procurement Notes
When requesting a quote for SN74AVC2T245_Bus, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What type of device is SN74AVC2T245_Bus?
SN74AVC2T245_Bus is a Texas Instruments dual-bit noninverting dual-supply bus transceiver. It provides configurable level shifting between two supply domains and includes tri-state outputs for interface bus control.
What supply voltages does SN74AVC2T245_Bus support?
The recommended operating range is 1.2 V to 3.6 V for both VCCA and VCCB. The absolute maximum supply-voltage range for either VCCA or VCCB is -0.5 V to 4.6 V.
Are the A-port and B-port I/Os voltage tolerant?
Yes. The extracted datasheet facts specify that the A-port and B-port I/Os are 4.6 V tolerant. The recommended input voltage range is 0 V to 3.6 V.
What data rates are specified for level shifting?
The device supports up to 500 Mbps for 1.8 V to 3.3 V level shifting. Other specified limits include 320 Mbps for lower-voltage to 3.3 V translation, 280 Mbps to 1.5 V, and 240 Mbps to 1.2 V.
What happens if one supply is at ground?
The device includes VCC isolation behavior. When either VCCA or VCCB is at GND, both ports are placed in a high-impedance state. Ioff circuitry also disables outputs during powered-down operation to prevent damaging current backflow.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.