# GT74LVC2T45V8

**GTIC** · Buffers, Drivers, Receivers, Transceivers · VSSOP-8

GT74LVC2T45V8 from GTIC, in a VSSOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VCCA | power_in | A-port supply voltage, specified for 1.65V ≤ VCCA ≤ 5.5 V. |
| 2 | A1 | bidirectional | Input/output A1, referenced to VCCA. |
| 3 | A2 | bidirectional | Input/output A2, referenced to VCCA. |
| 4 | GND | power_in | Ground. |
| 5 | DIR | input | Direction control signal: high selects A-to-B transmission and low selects B-to-A transmission; DIR is supplied by VCCA. |
| 6 | B2 | bidirectional | Input/output B2, referenced to VCCB. |
| 7 | B1 | bidirectional | Input/output B1, referenced to VCCB. |
| 8 | VCCB | power_in | B-port supply voltage, specified for 1.65V ≤ VCCB ≤ 5.5 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | GTIC |
| Package | VSSOP-8 |
| Category | Logic |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage range | VCCA, VCCB | -0.5 |  | 6.5 | V |  | 5 |
| Input voltage range, I/O ports (A port) | VI | -0.5 |  | 6.5 | V |  | 5 |
| Input voltage range, I/O ports (B port) | VI | -0.5 |  | 6.5 | V |  | 5 |
| Input voltage range, control inputs | VI | -0.5 |  | 6.5 | V |  | 5 |
| Voltage applied to output in high-impedance or power-off state, A port | VO | -0.5 |  | 6.5 | V | high-impedance or power-off state | 5 |
| Voltage applied to output in high-impedance or power-off state, B port | VO | -0.5 |  | 6.5 | V | high-impedance or power-off state | 5 |
| Voltage applied to output in high or low state, A port (max printed as VCCA + 0.5 V) | VO | -0.5 |  |  | V | output in high or low state | 5 |
| Voltage applied to output in high or low state, B port (max printed as VCCB + 0.5 V) | VO | -0.5 |  |  | V | output in high or low state | 5 |
| Input clamp current | IIK | -50 |  |  | mA | VI < 0 | 5 |
| Output clamp current | IOK | -50 |  |  | mA | VO < 0 | 5 |
| Continuous output current | IO | -50 |  | 50 | mA |  | 5 |
| Continuous current through each VCCA, VCCB, and GND |  | -100 |  | 100 | mA |  | 5 |
| Supply voltage VCCA | VCCA | 1.65 |  | 5.5 | V |  | 6 |
| Supply voltage VCCB | VCCB | 1.65 |  | 5.5 | V |  | 6 |
| High-level input voltage, data inputs | VIH | 1.7 |  |  | V | VCCI 2.3V to 2.7V | 6 |
| High-level input voltage, data inputs | VIH | 2 |  |  | V | VCCI 3V to 3.6V | 6 |
| Low-level input voltage, data inputs | VIL |  |  | 0.7 | V | VCCI 2.3V to 2.7V | 6 |
| Low-level input voltage, data inputs | VIL |  |  | 0.8 | V | VCCI 3V to 3.6V | 6 |
| High-level input voltage, control inputs (referenced to VCCA) | VIH | 1.7 |  |  | V | VCCA 2.3V to 2.7V | 6 |
| High-level input voltage, control inputs (referenced to VCCA) | VIH | 2 |  |  | V | VCCA 3V to 3.6V | 6 |
| Low-level input voltage, control inputs (referenced to VCCA) | VIL |  |  | 0.7 | V | VCCI 2.3V to 2.7V | 6 |
| Low-level input voltage, control inputs (referenced to VCCA) | VIL |  |  | 0.8 | V | VCCI 3V to 3.6V | 6 |
| High-level output current | IOH | -4 |  |  | mA | VCCO 1.65V to 1.95V | 6 |
| High-level output current | IOH | -8 |  |  | mA | VCCO 2.3V to 2.7V | 6 |
| High-level output current | IOH | -24 |  |  | mA | VCCO 3V to 3.6V | 6 |
| High-level output current | IOH | -32 |  |  | mA | VCCO 4.5V to 5.5V | 6 |
| Low-level output current | IOL |  |  | 4 | mA | VCCO 1.65V to 1.95V | 6 |
| Low-level output current | IOL |  |  | 8 | mA | VCCO 2.3V to 2.7V | 6 |
| Low-level output current | IOL |  |  | 24 | mA | VCCO 3V to 3.6V | 6 |
| Low-level output current | IOL |  |  | 32 | mA | VCCO 4.5V to 5.5V | 6 |
| Input transition rise or fall rate, data inputs | Δt/Δv |  |  | 20 | ns/V | VCCI 1.65V to 1.95V | 6 |
| Input transition rise or fall rate, data inputs | Δt/Δv |  |  | 10 | ns/V | VCCI 3V to 3.6V | 6 |
| Input transition rise or fall rate, data inputs | Δt/Δv |  |  | 5 | ns/V | VCCI 4.5V to 5.5V | 6 |
| Operating free-air temperature | TA | -40 |  | 125 | °C |  | 6 |
| High-level output voltage | VOH | 1.2 |  |  | V | IOH=-4 mA, (VI=VIH); VCCA=1.65V, VCCB=1.65V | 7 |
| High-level output voltage | VOH | 1.9 |  |  | V | IOH=-8 mA, (VI=VIH); VCCA=2.3V, VCCB=2.3V | 7 |
| High-level output voltage | VOH | 2.4 |  |  | V | IOH=-24 mA, (VI=VIH); VCCA=3V, VCCB=3V | 7 |
| High-level output voltage | VOH | 3.8 |  |  | V | IOH=-32 mA, (VI=VIH); VCCA=4.5V, VCCB=4.5V | 7 |
| Low-level output voltage | VOL |  |  | 0.1 | V | IOL=100 μA, (VI=VIL); VCCA and VCCB 1.65V to 4.5V | 7 |
| Low-level output voltage | VOL |  |  | 0.45 | V | IOL=4 mA, (VI=VIL); VCCA=1.65V, VCCB=1.65V | 7 |
| Low-level output voltage | VOL |  |  | 0.3 | V | IOL=8 mA, (VI=VIL); VCCA=2.3V, VCCB=2.3V | 7 |
| Low-level output voltage | VOL |  |  | 0.55 | V | IOL=24 mA, (VI=VIL); VCCA=3V, VCCB=3V | 7 |
| DIR input leakage current | II | -2 |  | 2 | μA | DIR, VI=VCCA or GND; VCCA and VCCB 1.65V to 5.5V | 7 |
| Power-off leakage current, A or B port | Ioff | -2 |  | 2 | μA | VI or VO=0 to 5.5V; VCCA=0V, VCCB=0 to 5.5V | 7 |
| Off-state (high-impedance) output current, A or B port | IOZ | -2 |  | 2 | μA | VO=VCCO or GND, OEB=VIH; VCCA and VCCB 1.65V to 5.5V | 7 |
| Quiescent supply current, ICCA | ICCA |  |  | 15 | μA | VI=VCCI or GND, IO=0; VCCA and VCCB 1.65V to 5.5V | 7 |
| Quiescent supply current, ICCA | ICCA |  |  | -2 | μA | VI=VCCI or GND, IO=0; VCCA=0V, VCCB=5V | 7 |
| Quiescent supply current, ICCB | ICCB |  |  | 15 | μA | VI=VCCI or GND, IO=0; VCCA and VCCB 1.65V to 5.5V | 7 |
| Quiescent supply current, ICCB | ICCB |  |  | -2 | μA | VI=VCCI or GND, IO=0; VCCA=5V, VCCB=0V | 7 |
| Quiescent supply current, ICCA + ICCB | ICCA + ICCB |  |  | 25 | μA | VI=VCCI or GND, IO=0; VCCA and VCCB 1.65V to 5.5V | 7 |
| Additional supply current, A port | ΔICCA |  |  | 50 | μA | A Port one at VCCA-0.6V, DIR at VCCA, B Port=Open; VCCA and VCCB 3V to 5.5V | 7 |
| Additional supply current, DIR input |  |  |  | 50 | μA | DIR at VCCA-0.6V, B Port=Open, A Port at VCCA or GND; VCCA and VCCB 3V to 5.5V | 7 |
| Additional supply current, B port | ΔICCB |  |  | 50 | μA | B Port one at VCCB-0.6V, DIR at GND, A Port=Open; VCCA and VCCB 3V to 5.5V | 7 |
| Input capacitance, control inputs | Ci |  | 4 | 5 | pF | VI=VCCA or GND; VCCA=VCCB=3.3V | 7 |
| Input/output capacitance, A or B port | Cio |  | 8.5 | 10 | pF | VO=VCCA/B or GND; VCCA=VCCB=3.3V | 7 |

## CAD (KiCad official)

- Symbol: `GT74LVC2T45V8`
- Footprint: `Package_SO:VSSOP-8_2.3x2mm_P0.5mm`
- 3D model: VSSOP-8 (KiCad packages3D, STEP)
- 3D model files: `gt74lvc2t45v8-etched.step` / `gt74lvc2t45v8-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `gt74lvc2t45v8.step` / `gt74lvc2t45v8.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [GTIC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8609085077419024384) (17 pp, sha256 `789cab7f10557e2f`, retrieved 2026-10-19, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/gt74lvc2t45v8-datasheet.pdf)