Specifications
| Type | Description |
|---|---|
| Part Number | SN74AXC4T245 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package / Case | PW TSSOP-16 5 mm x 6.4 mm; BQB WQFN-16 3.5 mm x 2.5 mm; RSV UQFN-16 2.6 mm x 1.8 mm |
| Function | Four-bit noninverting bus transceiver with configurable voltage translation and tri-state outputs; Device description |
| A-Port Supply Voltage Range | 0.65-3.6 V; Recommended operating conditions |
| B-Port Supply Voltage Range | 0.65-3.6 V; Recommended operating conditions |
| Maximum Data Rate | Up to 380 Mbps; Translating from 1.8 V to 3.3 V |
| Operating Free-Air Temperature | -40 to 125 °C; Recommended operating conditions |
| VCC Isolation Threshold | 100 mV; if either VCCA or VCCB is below this value, all I/O outputs are disabled and high-impedance |
| Control Pin Reference | VCCA; xDIR and xOE inputs |
| Output Enable Behavior | OE high places outputs in tri-state mode; 1OE and 2OE pins |
| A-Port I/O Reference | VCCA; 1A1, 1A2, 2A1, 2A2 pins |
| B-Port I/O Reference | VCCB; 1B1, 1B2, 2B1, 2B2 pins |
| Absolute Maximum VCCA | -0.5 to 4.2 V; Supply voltage A |
| Absolute Maximum VCCB | -0.5 to 4.2 V; Supply voltage B |
| Absolute Maximum Input Voltage | -0.5 to 4.2 V; A-port I/O, B-port I/O, and control inputs |
| Absolute Maximum High-Impedance Output Voltage | -0.5 to 4.2 V; Voltage applied to any output in high-impedance or power-off state |
| Absolute Maximum Active Output Voltage | -0.5 to VCCO + 0.2 V; Voltage applied to any output in high or low state |
| Input Clamp Current | -50 mA; VI < 0 V |
| Output Clamp Current | -50 mA; VO < 0 V |
| Continuous Output Current | -50 to 50 mA; Absolute maximum rating |
| Continuous Current Through VCC or GND | -100 to 100 mA; Absolute maximum rating |
| Junction Temperature | 150 °C; Absolute maximum rating |
| Storage Temperature | -65 to 150 °C; Absolute maximum rating |
| ESD Rating HBM | ±8000 V; ANSI/ESDA/JEDEC JS-001 |
| ESD Rating CDM | ±1000 V; JEDEC JESD22-C101 |
| High-Level Input Voltage, 0.65-1 V VCCI | 0.70 x VCCI; Data inputs |
| High-Level Input Voltage, 1.1-1.95 V VCCI | 0.65 x VCCI; Data inputs |
| High-Level Input Voltage, 2.3-2.7 V VCCI | 1.6 V; Data inputs |
| High-Level Input Voltage, 3-3.6 V VCCI | 2 V; Data inputs |
| Low-Level Input Voltage, 0.65-1 V VCCI | 0.30 x VCCI; Data inputs |
| Low-Level Input Voltage, 1.1-1.95 V VCCI | 0.35 x VCCI; Data inputs |
| Low-Level Input Voltage, 2.3-2.7 V VCCI | 0.7 V; Data inputs |
| Low-Level Input Voltage, 3-3.6 V VCCI | 0.8 V; Data inputs |
| Input Voltage Range | 0-3.6 V; Recommended operating conditions |
| Output Voltage Range, Active State | 0 to VCCO |
| Output Voltage Range, Tri-State | 0-3.6 V |
| Input Transition Rate | 10 ns/V; Recommended operating conditions |
| Thermal Resistance Junction-to-Ambient, PW | 126.9 °C/W; PW TSSOP-16 package |
| Thermal Resistance Junction-to-Ambient, RSV | 130.1 °C/W; RSV UQFN-16 package |
| Thermal Resistance Junction-to-Ambient, BQB | 73.0 °C/W; BQB WQFN-16 package |
| High-Level Output Voltage, Light Load | VCCO - 0.1 V min; IOH = -100 µA, VCCA = VCCB = 0.7-3.6 V, VI = VIH |
| High-Level Output Voltage, 0.65 V Supplies | 0.55 V min; IOH = -50 µA, VCCA = VCCB = 0.65 V, VI = VIH |
| High-Level Output Voltage, 3 V Supplies | 2.3 V min; IOH = -12 mA, VCCA = VCCB = 3 V, VI = VIH |
| Low-Level Output Voltage, Light Load | 0.1 V max; IOL = 100 µA, VCCA = VCCB = 0.7-3.6 V, VI = VIL |
| Low-Level Output Voltage, 3 V Supplies | 0.7 V max; IOL = 12 mA, VCCA = VCCB = 3 V, VI = VIL |
| Control Input Leakage Current | -0.5 to 0.5 µA max at -40 to 85 °C; -1 to 1 µA max at -40 to 125 °C; xDIR and xOE, VI = VCCA or GND, VCCA = VCCB = 0.65-3.6 V |
| Data Input Leakage Current | -4 to 4 µA max at -40 to 85 °C; -8 to 8 µA max at -40 to 125 °C; xAx and xBx, VI = VCCI or GND, VCCA = VCCB = 0.65-3.6 V |
| Partial Power-Down Current | -4 to 4 µA max at -40 to 85 °C; -8 to 8 µA max at -40 to 125 °C; A or B port, VI or VO = 0-3.6 V, one supply at 0 V |
| Tri-State Output Current | -4 to 4 µA max at -40 to 85 °C; -8 to 8 µA max at -40 to 125 °C; VI = VCCI or GND, VO = VCCO or GND, OE = VIH, VCCA = VCCB = 3.6 V |
| Combined Supply Current | 20 µA typ, 40 µA max; ICCA + ICCB, VI = VCCI or GND, IO = 0, VCCA = VCCB = 0.65-3.6 V |
| Control Input Capacitance | 4.5 pF typ; VI = 3.3 V or GND, VCCA = VCCB = 3.3 V |
| Data I/O Capacitance | 6.6 pF typ; OE = VCCA, VO = 1.65 V DC, 1 MHz -16 dBm sine wave, VCCA = VCCB = 3.3 V |
| Datasheet Status | request_only |
Product Overview
The SN74AXC4T245 is a Texas Instruments four-bit noninverting bus transceiver with configurable voltage translation and tri-state outputs. The A-port supply and B-port supply each operate from 0.65 V to 3.6 V, allowing translation between independent logic-voltage domains within the stated recommended operating range. The xDIR and xOE control inputs are referenced to VCCA, while the A-port I/O pins are referenced to VCCA and the B-port I/O pins are referenced to VCCB.
Output control is handled through 1OE and 2OE, where OE high places the outputs in tri-state mode. If either VCCA or VCCB is below the 100 mV isolation threshold, all I/O outputs are disabled and placed in high impedance. The device supports active output voltage from 0 to VCCO and tri-state output voltage from 0 V to 3.6 V.
Available packages are PW TSSOP-16 at 5 mm x 6.4 mm, BQB WQFN-16 at 3.5 mm x 2.5 mm, and RSV UQFN-16 at 2.6 mm x 1.8 mm. The device is specified for -40 °C to 125 °C operation and up to 380 Mbps translation from 1.8 V to 3.3 V.
Key Features
- Four-bit noninverting bus transceiver function
- Configurable voltage translation with tri-state outputs
- A and B supplies support 0.65-3.6 V
- Up to 380 Mbps at 1.8 V to 3.3 V
- OE high places outputs in tri-state mode
- 100 mV VCC isolation disables all I/O outputs
- Control inputs referenced to VCCA
- A-port I/O referenced to VCCA
- B-port I/O referenced to VCCB
- Operates from -40 °C to 125 °C
- HBM ESD rating is ±8000 V
- Combined supply current is 20 µA typical
Typical Applications
- Voltage-domain bus translation
- Four-bit bidirectional logic interfaces
- Tri-state output isolation
- Partial power-down port interfaces
- VCCA-referenced control logic
- A-to-B or B-to-A signal transfer
- Compact TSSOP, WQFN, or UQFN assemblies
Procurement Notes
When requesting a quote for SN74AXC4T245, 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 the SN74AXC4T245?
The SN74AXC4T245 is a four-bit noninverting bus transceiver from Texas Instruments. It provides configurable voltage translation and tri-state outputs for interfaces using separate A-port and B-port supply domains.
What supply ranges does SN74AXC4T245 support?
Both the A-port supply VCCA and B-port supply VCCB are specified for 0.65 V to 3.6 V under recommended operating conditions. A-port I/O is referenced to VCCA, and B-port I/O is referenced to VCCB.
How do the output enable pins control the outputs?
The 1OE and 2OE pins control tri-state behavior. When OE is high, the outputs are placed in tri-state mode. The xOE and xDIR control inputs are referenced to VCCA.
What happens if one supply falls below the isolation threshold?
If either VCCA or VCCB is below 100 mV, all I/O outputs are disabled and placed in a high-impedance state. This behavior supports isolation during low-supply or power-off conditions.
Which packages are listed for the SN74AXC4T245?
The listed packages are PW TSSOP-16 measuring 5 mm x 6.4 mm, BQB WQFN-16 measuring 3.5 mm x 2.5 mm, and RSV UQFN-16 measuring 2.6 mm x 1.8 mm.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 8, 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.