Specifications
| Type | Description |
|---|---|
| Part Number | SN74LVC1T45DCKR |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package / Case | DCK (SC70, 6-pin), 2 mm x 2.1 mm nominal |
| Supply voltage VCCA | 1.65 to 5.5 V |
| Supply voltage VCCB | 1.65 to 5.5 V |
| Absolute maximum supply voltage VCCA/VCCB | -0.5 to 6.5 V |
| Input voltage absolute maximum | -0.5 to 6.5 V |
| High-impedance or power-off output voltage absolute maximum | -0.5 to 6.5 V |
| Output voltage absolute maximum, A port active state | -0.5 to VCCA + 0.5 V |
| Output voltage absolute maximum, B port active state | -0.5 to VCCB + 0.5 V |
| Input clamp current | -50 mA |
| Output clamp current | -50 mA |
| Continuous output current | ±50 mA |
| Continuous current through VCC or GND | ±100 mA |
| Junction temperature | 150 °C |
| Storage temperature | -65 to 150 °C |
| ESD rating, HBM | ±2000 V |
| ESD rating, CDM | ±1000 V |
| ESD rating, Machine Model | ±200 V |
| High-level input voltage, data inputs | VCCI x 0.65 min |
| High-level input voltage, data inputs | 1.7 V min |
| High-level input voltage, data inputs | 2 V min |
| High-level input voltage, data inputs | VCCI x 0.7 min |
| Low-level input voltage, data inputs | VCCI x 0.35 max |
| Low-level input voltage, data inputs | 0.7 V max |
| Low-level input voltage, data inputs | 0.8 V max |
| Low-level input voltage, data inputs | VCCI x 0.3 max |
| High-level input voltage, DIR | VCCA x 0.65 min |
| High-level input voltage, DIR | 1.7 V min |
| High-level input voltage, DIR | 2 V min |
| High-level input voltage, DIR | VCCA x 0.7 min |
| Low-level input voltage, DIR | VCCA x 0.35 max |
| Low-level input voltage, DIR | 0.7 V max |
| Low-level input voltage, DIR | 0.8 V max |
| Low-level input voltage, DIR | VCCA x 0.3 max |
| Input voltage operating range | 0 to 5.5 V |
| Output voltage operating range | 0 to VCCO V |
| High-level output current | -4 mA |
| High-level output current | -8 mA |
| High-level output current | -24 mA |
| High-level output current | -32 mA |
| Low-level output current | 4 mA |
| Low-level output current | 8 mA |
| Low-level output current | 24 mA |
| Low-level output current | 32 mA |
| Input transition rise/fall rate, data inputs | 20 ns/V max |
| Input transition rise/fall rate, data inputs | 20 ns/V max |
| Input transition rise/fall rate, data inputs | 10 ns/V max |
| Input transition rise/fall rate, data inputs | 5 ns/V max |
| Input transition rise/fall rate, control inputs | 5 ns/V max |
| Operating free-air temperature | -40 to 85 °C |
| VOH | VCCO - 0.1 V min |
| VOH | 1.2 V min |
| VOH | 1.9 V min |
| VOH | 2.4 V min |
| VOH | 3.8 V min |
| VOL | 0.1 V max |
| VOL | 0.45 V max |
| VOL | 0.3 V max |
| VOL | 0.55 V max |
| VOL | 0.55 V max |
| DIR input leakage current II | ±1 µA typ, ±2 µA max |
| Power-off leakage current Ioff, A port | ±1 µA typ, ±2 µA max |
| Power-off leakage current Ioff, B port | ±1 µA typ, ±2 µA max |
| High-impedance output leakage IOZ | ±1 µA typ, ±2 µA max |
| Quiescent supply current ICCA | 3 µA max |
| Quiescent supply current ICCB | 3 µA max |
| Total quiescent supply current ICCA + ICCB | 4 µA max |
| Delta supply current ΔICCA, A port | 50 µA max |
| Delta supply current ΔICCA, DIR | 50 µA max |
| Delta supply current ΔICCB, B port | 50 µA max |
| Input capacitance, DIR | 2.5 pF typ |
| I/O capacitance, A or B port | 6 pF typ |
| Maximum data rate | 420 Mbps |
| Maximum data rate | 210 Mbps |
| Maximum data rate | 140 Mbps |
| Maximum data rate | 75 Mbps |
| Output drive | ±24 mA |
| Latch-up performance | >100 mA |
| Direction control behavior | DIR low selects B-port to A-port direction |
| Voltage isolation feature | both ports high impedance if either VCC input is at GND |
| Datasheet Status | request_only |
Product Overview
SN74LVC1T45DCKR is a Texas Instruments single-bit dual-supply bus transceiver for Signal_Chain interfaces that require one bidirectional logic path between two voltage domains. VCCA and VCCB are each specified for 1.65 to 5.5 V recommended operation, while the DIR control input is referenced to VCCA.
Key Features
- Single-bit dual-supply bus transceiver architecture
- VCCA and VCCB support 1.65 to 5.5 V operation
- DIR low selects B-port to A-port translation
- Both ports high impedance when either supply is grounded
- 420 Mbps maximum for 3.3 V to 5 V translation
- 210 Mbps maximum when translating to 3.3 V
- 140 Mbps maximum when translating to 2.5 V
- 75 Mbps maximum when translating to 1.8 V
- ±24 mA output drive at 3.3 V
- DCK SC70 6-pin, 2 mm x 2.1 mm package
Typical Applications
- Single-bit bidirectional logic translation
- 3.3 V to 5 V signal translation
- Translation to 3.3 V logic
- Translation to 2.5 V logic
- Translation to 1.8 V logic
- Direction-controlled digital signal paths
- Power-off high-impedance port isolation
Procurement Notes
When requesting a quote for SN74LVC1T45DCKR, 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 SN74LVC1T45DCKR support?
SN74LVC1T45DCKR supports recommended operating supplies from 1.65 to 5.5 V on both VCCA and VCCB, allowing the A and B ports to operate from separate logic supply domains.
How is the translation direction controlled?
The DIR input controls direction and is referenced to VCCA. When DIR is low, the device selects B-port to A-port direction according to the extracted datasheet facts.
What happens if one supply is at GND?
The voltage isolation feature places both ports in a high-impedance state when either VCCA or VCCB is at GND, supporting isolation during a grounded supply condition.
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.