Specifications
| Type | Description |
|---|---|
| Part Number | SN74LVC1T45DBVR |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Component Type | Other |
| Package / Case | DBV (SOT-23, 6), 2.9 mm × 2.8 mm |
| Supply Voltage VCCA | 1.65 to 5.5 V; recommended operating conditions |
| Supply Voltage VCCB | 1.65 to 5.5 V; recommended operating conditions |
| Absolute Maximum Supply Voltage VCCA | -0.5 to 6.5 V; over operating free-air temperature range |
| Absolute Maximum Supply Voltage VCCB | -0.5 to 6.5 V; over operating free-air temperature range |
| Input Voltage Range | 0 to 5.5 V; recommended operating conditions |
| Output Voltage Range | 0 to VCCO V; recommended operating conditions |
| Operating Free-Air Temperature | -40 to 85 °C; recommended operating conditions |
| Storage Temperature | -65 to 150 °C; absolute maximum ratings |
| Junction Temperature | 150 °C max; absolute maximum ratings |
| High-Level Input Voltage VIH, VCCI 1.65 to 1.95 V | VCCI × 0.65 min; data inputs |
| High-Level Input Voltage VIH, VCCI 2.3 to 2.7 V | 1.7 V min; data inputs |
| High-Level Input Voltage VIH, VCCI 3 to 3.6 V | 2 V min; data inputs |
| High-Level Input Voltage VIH, VCCI 4.5 to 5.5 V | VCCI × 0.7 min; data inputs |
| Low-Level Input Voltage VIL, VCCI 1.65 to 1.95 V | VCCI × 0.35 max; data inputs |
| Low-Level Input Voltage VIL, VCCI 2.3 to 2.7 V | 0.7 V max; data inputs |
| Low-Level Input Voltage VIL, VCCI 3 to 3.6 V | 0.8 V max; data inputs |
| Low-Level Input Voltage VIL, VCCI 4.5 to 5.5 V | VCCI × 0.3 max; data inputs |
| High-Level DIR Input Voltage VIH | VCCA × 0.65 min; DIR input referenced to VCCA, VCCA = 1.65 to 1.95 V |
| Low-Level DIR Input Voltage VIL | VCCA × 0.35 max; DIR input referenced to VCCA, VCCA = 1.65 to 1.95 V |
| High-Level Output Current IOH, VCCO 1.65 to 1.95 V | -4 mA |
| High-Level Output Current IOH, VCCO 2.3 to 2.7 V | -8 mA |
| High-Level Output Current IOH, VCCO 3 to 3.6 V | -24 mA |
| High-Level Output Current IOH, VCCO 4.5 to 5.5 V | -32 mA |
| Low-Level Output Current IOL, VCCO 1.65 to 1.95 V | 4 mA |
| Low-Level Output Current IOL, VCCO 2.3 to 2.7 V | 8 mA |
| Low-Level Output Current IOL, VCCO 3 to 3.6 V | 24 mA |
| Low-Level Output Current IOL, VCCO 4.5 to 5.5 V | 32 mA |
| Low Power Consumption ICC | 4 µA max; feature summary |
| ICC Total Supply Current | 4 µA max; ICCA + ICCB, VI = VCCI or GND, IO = 0, VCCA and VCCB = 1.65 to 5.5 V |
| High-Level Output Voltage VOH | VCCO - 0.1 V min; IOH = -100 µA, VCCA and VCCB = 1.65 to 4.5 V |
| Low-Level Output Voltage VOL | 0.1 V max; IOL = 100 µA, VCCA and VCCB = 1.65 to 4.5 V |
| Input Leakage Current II | ±2 µA max; DIR, VI = VCCA or GND, VCCA and VCCB = 1.65 to 5.5 V, TA = -40 to 85 °C |
| Power-Off Leakage Current Ioff | ±2 µA max; A port or B port, VI or VO = 0 to 5.5 V, TA = -40 to 85 °C |
| 3-State Output Leakage IOZ | ±2 µA max; A or B port, VO = VCCO or GND, VCCA and VCCB = 1.65 to 5.5 V, TA = -40 to 85 °C |
| DIR Input Capacitance Ci | 2.5 pF typ; VI = VCCA or GND, VCCA = 3.3 V, VCCB = 3.3 V, TA = 25 °C |
| A or B Port I/O Capacitance Cio | 6 pF typ; VO = VCCA/B or GND, VCCA = 3.3 V, VCCB = 3.3 V, TA = 25 °C |
| Maximum Data Rate, 3.3 V to 5 V Translation | 420 Mbps |
| Maximum Data Rate, Translate to 3.3 V | 210 Mbps |
| Maximum Data Rate, Translate to 2.5 V | 140 Mbps |
| Maximum Data Rate, Translate to 1.8 V | 75 Mbps |
| ESD Rating HBM | ±2000 V; Human-body model per ANSI/ESDA/JEDEC JS-001 |
| ESD Rating CDM | ±1000 V; Charged-device model per JEDEC JESD22-C101 |
| ESD Rating Machine Model | ±200 V; Machine Model |
| Latch-Up Performance | >100 mA; per JESD 78, Class II |
| Continuous Output Current | ±50 mA; absolute maximum ratings |
| Continuous Current Through VCC or GND | ±100 mA; absolute maximum ratings |
| Thermal Resistance RθJA | 215.1 °C/W; DBV SOT-23 package, 6 pins |
| Propagation Delay tPLH | 3 to 17.7 ns; A to B, VCCA = 1.8 V ±0.15 V, VCCB = 1.8 V ±0.15 V |
| Propagation Delay tPHL | 2.8 to 14.3 ns; A to B, VCCA = 1.8 V ±0.15 V, VCCB = 1.8 V ±0.15 V |
| Direction Control | GND low level determines B-port to A-port direction; DIR pin function |
| VCC Isolation Feature | Both ports high-impedance if either VCC input is at GND |
| Datasheet Status | request_only |
Product Overview
SN74LVC1T45DBVR is a Texas Instruments single-bit dual-supply bus transceiver for Signal_Chain interfaces that need translation between two voltage domains. VCCA and VCCB each operate from 1.65 to 5.5 V, allowing A-port and B-port operation across low-voltage and 5 V logic rails.
Direction is controlled by the DIR pin. A low level at DIR selects B-port to A-port direction, and the DIR input is referenced to VCCA. The device includes a VCC isolation function that places both ports in high impedance if either VCC input is at GND.
The DBV package is a 6-pin SOT-23 outline measuring 2.9 mm × 2.8 mm, with RθJA specified as 215.1 °C/W. Electrical limits include 4 µA maximum total supply current, ±2 µA maximum leakage specifications, and output drive ratings up to ±32 mA at 4.5 to 5.5 V VCCO.
Key Features
- Single-bit dual-supply bus transceiver for A/B port translation
- VCCA and VCCB each support 1.65 to 5.5 V
- Maximum 420 Mbps for 3.3 V to 5 V translation
- DIR low level selects B-port to A-port direction
- Both ports high-impedance when either VCC input is GND
- 4 µA maximum total supply current over 1.65 to 5.5 V
- ±2 µA maximum DIR input leakage current
- ±2 µA maximum power-off leakage on A or B port
- DBV SOT-23 6-pin package, 2.9 mm × 2.8 mm
- -40 to 85 °C recommended operating free-air temperature
Typical Applications
- 1.8 V level translation
- 2.5 V level translation
- 3.3 V level translation
- 3.3 V to 5 V translation
- Direction-controlled single-bit buses
- Power-off isolated signal paths
- Low-current signal-chain interfaces
Procurement Notes
When requesting a quote for SN74LVC1T45DBVR, 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 supply range does SN74LVC1T45DBVR support?
SN74LVC1T45DBVR supports recommended VCCA and VCCB supply voltages from 1.65 to 5.5 V. The absolute maximum rating for each supply is -0.5 to 6.5 V over the operating free-air temperature range.
How is signal direction controlled on this transceiver?
Direction is set by the DIR pin. The extracted datasheet facts specify that a GND low level on DIR determines B-port to A-port direction, and the DIR input thresholds are referenced to VCCA.
What happens if either VCC input is at GND?
The VCC isolation feature places both ports in a high-impedance state when either VCC input is at GND. This behavior applies to the A and B ports according to the functional description.
What data rates are specified for voltage translation?
The device supports up to 420 Mbps for 3.3 V to 5 V translation, 210 Mbps when translating to 3.3 V, 140 Mbps when translating to 2.5 V, and 75 Mbps when translating to 1.8 V.
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.