Specifications
| Type | Description |
|---|---|
| Part Number | SN74LVC2T45 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package / Case | DCT SM8-8 2.95 mm x 4 mm; DCU VSSOP-8 2 mm x 3.1 mm; YZP DSBGA-8 1.5 mm x 0.5 mm |
| Function | Dual-bit noninverting bus transceiver with configurable voltage translation; dual separate configurable supply rails |
| A-port supply voltage range | 1.65-5.5 V; VCCA operating range |
| B-port supply voltage range | 1.65-5.5 V; VCCB operating range |
| Supported voltage translation nodes | 1.8 V, 2.5 V, 3.3 V, 5 V; universal low-voltage bidirectional translation |
| Direction control reference supply | VCCA; DIR input circuit referenced to VCCA |
| Power-off isolation | Both ports high impedance when either VCC input is at GND; VCC isolation feature |
| Maximum low-power supply current | 4 uA max; ICC maximum |
| Output drive current | +/-24 mA at 3.3 V |
| Maximum data rate | 420 Mbps; 3.3-V to 5-V translation |
| Maximum data rate | 210 Mbps; translate to 3.3 V |
| Maximum data rate | 140 Mbps; translate to 2.5 V |
| Maximum data rate | 75 Mbps; translate to 1.8 V |
| Latch-up performance | >100 mA; per JESD 78, Class II |
| ESD rating HBM | +/-4000 V; Human-Body Model, JESD 22 / ANSI/ESDA/JEDEC JS-001 |
| ESD rating CDM | +/-1000 V; Charged-Device Model, JESD 22 / ANSI/ESDA/JEDEC JS-002 |
| ESD rating machine model | 200 V; Machine Model A115-A |
| VCCA pin | Pin 1; DCT or DCU package, A-port supply voltage |
| VCCB pin | Pin 8; DCT or DCU package, B-port supply voltage |
| DIR pin | Pin 5; DCT or DCU package, direction control signal |
| A1 pin | Pin 2; DCT or DCU package, input/output referenced to VCCA |
| A2 pin | Pin 3; DCT or DCU package, input/output referenced to VCCA |
| B1 pin | Pin 7; DCT or DCU package, input/output referenced to VCCB |
| B2 pin | Pin 6; DCT or DCU package, input/output referenced to VCCB |
| GND pin | Pin 4; DCT or DCU package |
| Supply voltage absolute maximum | -0.5 to 6.5 V; VCCA and VCCB |
| Input voltage absolute maximum | -0.5 to 6.5 V; VI |
| High-impedance or power-off output voltage absolute maximum | -0.5 to 6.5 V; VO applied to any output in high-impedance or power-off state |
| Output voltage absolute maximum, A port | -0.5 to VCCA + 0.5 V; output in high or low state |
| Output voltage absolute maximum, B port | -0.5 to VCCB + 0.5 V; output in high or low state |
| Input clamp current absolute maximum | -50 mA; VI < 0 |
| Output clamp current absolute maximum | -50 mA; VO < 0 |
| Continuous output current absolute maximum | -50 to 50 mA; IO |
| Continuous current through VCC or GND absolute maximum | -100 to 100 mA; through VCC or GND |
| Junction temperature absolute maximum | 150 degC; TJ |
| Storage temperature range | -65 to 150 degC; Tstg |
| Recommended input voltage | 0 to 5.5 V; VI |
| Recommended output voltage | 0 to VCCO V; VO |
| Recommended operating temperature | -40 to 85 degC; TA, operating free-air temperature |
| High-level data input voltage | VCCI x 0.65 min; VCCI = 1.65 V to 1.95 V |
| High-level data input voltage | 1.7 V min; VCCI = 2.3 V to 2.7 V |
| High-level data input voltage | 2 V min; VCCI = 3 V to 3.6 V |
| High-level data input voltage | VCCI x 0.7 min; VCCI = 4.5 V to 5.5 V |
| Low-level data input voltage | VCCI x 0.35 max; VCCI = 1.65 V to 1.95 V |
| Low-level data input voltage | 0.7 V max; VCCI = 2.3 V to 2.7 V |
| Low-level data input voltage | 0.8 V max; VCCI = 3 V to 3.6 V |
| Low-level data input voltage | VCCI x 0.3 max; VCCI = 4.5 V to 5.5 V |
| High-level output current | -4 mA; VCCO = 1.65 V to 1.95 V |
| High-level output current | -8 mA; VCCO = 2.3 V to 2.7 V |
| High-level output current | -24 mA; VCCO = 3 V to 3.6 V |
| High-level output current | -32 mA; VCCO = 4.5 V to 5.5 V |
| Low-level output current | 4 mA; VCCO = 1.65 V to 1.95 V |
| Low-level output current | 8 mA; VCCO = 2.3 V to 2.7 V |
| Low-level output current | 24 mA; VCCO = 3 V to 3.6 V |
| Low-level output current | 32 mA; VCCO = 4.5 V to 5.5 V |
| DIR input leakage current | +/-1 uA typ, +/-2 uA max; VI = VCCA or GND, VCCA = 1.65 V to 5.5 V, VCCB = 1.65 V to 5.5 V |
| Power-off leakage current, A port | +/-1 uA typ, +/-2 uA max; VCCA = 0 V, VCCB = 0 to 5.5 V, VI or VO = 0 to 5.5 V |
| Power-off leakage current, B port | +/-1 uA typ, +/-2 uA max; VCCA = 0 to 5.5 V, VCCB = 0 V, VI or VO = 0 to 5.5 V |
| High-impedance output leakage current | +/-1 uA typ, +/-2 uA max; VO = VCCO or GND, VCCA = 1.65 V to 5.5 V, VCCB = 1.65 V to 5.5 V |
| Supply current total | 4 uA max; ICCA + ICCB, VI = VCCI or GND, IO = 0, VCCA = 1.65 V to 5.5 V, VCCB = 1.65 V to 5.5 V |
| DIR input capacitance | 2.5 pF typ; VI = VCCA or GND, VCCA = 3.3 V, VCCB = 3.3 V |
| A/B port I/O capacitance | 6 pF typ; VO = VCCA/B or GND, VCCA = 3.3 V, VCCB = 3.3 V |
| Datasheet Status | request_only |
Product Overview
The SN74LVC2T45 is a Texas Instruments dual-bit noninverting bus transceiver with configurable voltage translation. It uses two separate supply rails, VCCA for the A port and VCCB for the B port, each operating from 1.65 V to 5.5 V. Supported translation nodes include 1.8 V, 2.5 V, 3.3 V, and 5 V, with the DIR control input referenced to VCCA.
For DCT and DCU packages, VCCA is pin 1, VCCB is pin 8, GND is pin 4, and DIR is pin 5. A1 and A2 are pins 2 and 3 and are referenced to VCCA, while B1 and B2 are pins 7 and 6 and are referenced to VCCB. Package options include DCT SM8-8, DCU VSSOP-8, and YZP DSBGA-8.
The device supports bus voltage translation applications requiring defined current drive and power-off behavior. It provides up to +/-24 mA output drive at 3.3 V, 4 uA maximum supply current, and maximum data rates from 75 Mbps to 420 Mbps depending on the translated voltage node.
Key Features
- Dual-bit noninverting bus transceiver for configurable voltage translation
- Separate VCCA and VCCB rails from 1.65 V to 5.5 V
- Supports 1.8 V, 2.5 V, 3.3 V, and 5 V nodes
- DIR control input is referenced to VCCA
- Both ports high impedance when either VCC is grounded
- 4 uA maximum total supply current
- Up to 420 Mbps for 3.3 V to 5 V translation
- +/-24 mA output drive at 3.3 V
- HBM ESD rating of +/-4000 V
- DCT, DCU, and YZP package options
Typical Applications
- Dual-bit bus voltage translation
- 1.8 V logic node translation
- 2.5 V logic node translation
- 3.3 V logic node translation
- 5 V logic node translation
- Bidirectional low-voltage bus links
- Power-off isolated I/O ports
- VCCA-referenced direction control designs
Procurement Notes
When requesting a quote for SN74LVC2T45, 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 SN74LVC2T45?
The SN74LVC2T45 is a Texas Instruments dual-bit dual-supply bus transceiver. It provides noninverting bus transceiver operation with configurable voltage translation using separate VCCA and VCCB supply rails.
What supply voltages does the SN74LVC2T45 support?
Both the A-port VCCA rail and B-port VCCB rail operate from 1.65 V to 5.5 V. The extracted datasheet facts list supported translation nodes of 1.8 V, 2.5 V, 3.3 V, and 5 V.
How does power-off isolation work on this device?
The device provides VCC isolation behavior. When either VCC input is at GND, both ports are placed in a high-impedance state, which supports power-off isolation between the A and B port I/O pins.
What are the package options for SN74LVC2T45?
The listed package options are DCT SM8-8 at 2.95 mm x 4 mm, DCU VSSOP-8 at 2 mm x 3.1 mm, and YZP DSBGA-8 at 1.5 mm x 0.5 mm.
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.