01 · Device purpose
Product Overview and Selection Scope
SN74LVC2G34 contains two independent non-inverting CMOS buffer gates with push-pull outputs.
- Dual independent channels: 1A drives 1Y and 2A drives 2Y without inversion.
- Wide supply range: 1.65 V to 5.5 V operation.
- Low static consumption: 0.1 µA typical supply current under the stated conditions.
- 5.5 V-tolerant inputs: supports down-voltage translation to VCC.
- High output drive: ±24 mA at VCC = 3.0 V under the specified DC tests.
- Partial power-down: Ioff allows voltages on inputs and outputs when VCC is 0 V.
- High-speed use: the supplied application guidance identifies operation up to 100 MHz, subject to system timing and loading validation.
Selection boundary: This is a plain-threshold dual buffer, not a Schmitt-trigger, tri-state, open-drain or analog device. Observe the specified input-transition limits.
02 · Logic and pins
Dual Buffer Function and Pin Assignment
Each channel is independent and non-inverting: a LOW input produces a LOW output, while a HIGH input produces a HIGH output.
| Pin | Name | Type | Function | Engineering note |
|---|---|---|---|---|
| 1 | 1A | Input | Channel 1 input | Do not leave floating. |
| 2 | GND | Power | Ground | Use a short local return path. |
| 3 | 2A | Input | Channel 2 input | Do not leave floating. |
| 4 | 2Y | Output | Channel 2 non-inverted output | Push-pull output. |
| 5 | VCC | Power | Supply | Place local bypass capacitance close to pins 5 and 2. |
| 6 | 1Y | Output | Channel 1 non-inverted output | Push-pull output. |
03 · Orderable options
Ordering Codes and Package Selection
| Ordering number | Temperature range | Package | Top marking | MSL | Packing |
|---|---|---|---|---|---|
| SN74LVC2G34DCKR | -40 °C to +125 °C | SC70-6 / SOT363 equivalent | C9F | MSL 3 | Tape and reel, 3,000 units |
| SN74LVC2G34DBVR | -40 °C to +125 °C | SOT23-6 | C345 | MSL 3 | Tape and reel, 3,000 units |
Additional lot, date, vendor, logo or environmental markings may appear. Confirm the complete ordering code and package drawing during receiving inspection.
04 · Design envelope
Recommended Operating Conditions and Absolute Limits
| Parameter | VCC range or condition | Minimum | Maximum | Unit |
|---|---|---|---|---|
| Supply voltage, VCC | Operating | 1.65 | 5.5 | V |
| Supply voltage, VCC | Data retention only | 1.5 | - | V |
| High-level input, VIH | 1.65 to 1.95 V | 0.65 × VCC | - | V |
| High-level input, VIH | 2.3 to 2.7 / 3.0 to 3.6 V | 1.7 / 2.0 | - | V |
| High-level input, VIH | 4.5 to 5.5 V | 0.7 × VCC | - | V |
| Low-level input, VIL | 1.65 to 1.95 V | - | 0.35 × VCC | V |
| Low-level input, VIL | 2.3 to 2.7 / 3.0 to 3.6 V | - | 0.7 / 0.8 | V |
| Low-level input, VIL | 4.5 to 5.5 V | - | 0.3 × VCC | V |
| Input transition rise or fall | 1.8 / 3.3 / 5.0 V | - | 20 / 10 / 5 | ns/V |
| Ambient temperature | Operating | -40 | 125 | °C |
Absolute maximum and handling limits
| Parameter | Minimum | Maximum | Unit |
|---|---|---|---|
| Supply voltage, VCC | -0.5 | 6.5 | V |
| Input voltage, VI | -0.5 | 6.5 | V |
| Output voltage, high-impedance or power-off | -0.5 | 6.5 | V |
| Output voltage, HIGH or LOW state | -0.5 | VCC + 0.5 | V |
| Input / output clamp current | -50 when the associated pin voltage is below 0 V | mA | |
| Continuous output current | ±50 | mA | |
| Continuous VCC or GND current | ±100 | mA | |
| Junction / storage temperature | -65 | 150 | °C |
05 · Static performance
DC Output Levels, Leakage and Supply Current
| Parameter | Test condition | VCC | Limit or typical value | Unit |
|---|---|---|---|---|
| VOH | IOH = -100 µA | 1.65 V to 5.5 V | Minimum VCC - 0.1 V | V |
| VOH | IOH = -4 / -8 / -16 / -24 / -32 mA | 1.65 / 2.3 / 3.0 / 3.0 / 4.5 V | Minimum 1.2 / 1.9 / 2.4 / 2.3 / 3.8 V | V |
| VOL | IOL = 100 µA | 1.65 V to 5.5 V | Maximum 0.1 V | V |
| VOL | IOL = 4 / 8 / 16 / 24 / 32 mA | 1.65 / 2.3 / 3.0 / 3.0 / 4.5 V | Maximum 0.45 / 0.30 / 0.40 / 0.55 / 0.55 V | V |
| II | Inputs at 5.5 V or GND | 0 V to 5.5 V | ±0.1 µA typical; ±5 µA maximum full range | µA |
| Ioff | VI or VO = 5.5 V | 0 V | ±0.1 µA typical; ±10 µA maximum full range | µA |
| ICC | VI = 5.5 V or GND, IO = 0 | 1.65 V to 5.5 V | 0.1 µA typical; 10 µA maximum full range | µA |
| ΔICC | One input at VCC - 0.6 V | 3 V to 5.5 V | 500 µA maximum | µA |
| Ci | VI = VCC or GND | 3.3 V | 4 pF typical | pF |
06 · Dynamic performance
Propagation Delay and Dynamic Capacitance
| Parameter | 1.8 V | 2.5 V | 3.3 V | 5.0 V | Condition / unit |
|---|---|---|---|---|---|
| Propagation delay, tpd | 13.3 | 5.3 | 4.2 | 3.4 | Typical ns; CL = 30 pF or 50 pF |
| Power-dissipation capacitance, Cpd | 16 | 18 | 18 | 20 | Typical pF at 10 MHz |
Timing interpretation: Delay and signal quality depend on supply, source edge rate, output load and routing. The specification's 100 MHz application statement is not a substitute for validating board timing and ringing.
07 · Implementation
Translation, Bypass, Loading and PCB Guidance
- Down-translate safely: inputs accept up to 5.5 V while outputs swing from 0 V to VCC.
- Observe VIH and VIL: use the supply-specific thresholds in the recommended operating table.
- Respect input edge limits: maximum transition rates are 20 ns/V at 1.8/2.5 V, 10 ns/V at 3.3 V and 5 ns/V at 5 V.
- Do not leave inputs floating: hold every unused input at VCC or GND.
- Avoid output contention: 1Y and 2Y actively drive HIGH and LOW, and fault current can exceed absolute limits.
- Control fast edges: lightly loaded high-drive outputs can ring; keep routes short and validate loading and termination.
- Bypass locally: the PDF recommends 0.1 µF for a single supply, located as close as possible to the power pin. Parallel 0.1 µF and 1 µF capacitors may be used to reject different noise frequencies.
Application note: The supplied specification identifies high-drive LED loads, multiple logic inputs, down-voltage translation and applications up to 100 MHz. Validate current, thermal limits, edge rate, ringing and EMC in the complete assembly.
08 · Mechanical
SOT23-6 and SC70-6 Packages, Land Patterns and Packing
The two packages share the same logical pin assignment but have different body dimensions, lead pitch, marking and thermal impedance. Do not share one PCB footprint between them.
| Dimension | SOT23-6 | SC70-6 | Unit |
|---|---|---|---|
| Overall height A | 1.050 to 1.250 | 0.900 to 1.100 | mm |
| Body length D | 2.820 to 3.020 | 2.000 to 2.200 | mm |
| Body width E | 1.500 to 1.700 | 1.150 to 1.350 | mm |
| Overall lead span E1 | 2.650 to 2.950 | 2.150 to 2.450 | mm |
| Lead pitch e | 0.950 BSC | 0.650 BSC | mm |
| Outer lead pitch e1 | 1.800 to 2.000 | 1.300 BSC | mm |
| Lead width b | 0.300 to 0.500 | 0.150 to 0.350 | mm |
| Lead length L | 0.300 to 0.600 | 0.260 to 0.460 | mm |
09 · Use contexts
Application Guidance and Design Limitations
The supplied specification lists the following application areas. These are use contexts, not end-product approvals or safety certifications.
AC ReceiversProvide strong non-inverting control-signal drive.
Blu-ray and Home TheaterBuffer control and indicator signals in audio-video hardware.
Desktop and Notebook PCsRestore fan-out and isolate board-level logic paths.
Digital Video CamerasBuffer compact control and indicator interfaces.
Mobile PhonesProvide two compact low-voltage buffer channels.
GPS NavigationDrive portable navigation control signals.
Portable Media PlayersBuffer low-voltage control and indicator signals.10 · Engineering answers
SN74LVC2G34 Engineering FAQs
What function does SN74LVC2G34 implement?
It provides two independent non-inverting buffers. Each output follows its corresponding input.
Does it have Schmitt-trigger inputs?
No. The supplied specification gives conventional VIH/VIL thresholds and explicit input-transition limits.
Can the inputs accept 5.5 V?
Yes. Inputs are specified from 0 V to 5.5 V, enabling down-voltage translation to VCC.
What is the propagation delay?
The PDF lists typical propagation values of 13.3 ns at 1.8 V, 5.3 ns at 2.5 V, 4.2 ns at 3.3 V and 3.4 ns at 5 V under the stated load conditions.
What bypass capacitor is recommended?
The PDF recommends 0.1 µF for a single supply, installed as close to the power pin as possible. Parallel 0.1 µF and 1 µF capacitors are commonly used for broader noise rejection.
Can the outputs be wire-connected together?
No. 1Y and 2Y are push-pull outputs and must not oppose another actively driven output.
Which packages are listed?
SN74LVC2G34DBVR is SOT23-6 with C345 marking. SN74LVC2G34DCKR is SC70-6 with C9F marking. Both are MSL 3 and tape-and-reel packed in quantities of 3,000.
Can an unused input be left open?
No. Every unused input must be held at VCC or GND.
This page summarizes the supplied SN74LVC2G34 Rev A.1 product specification for component evaluation. Confirm the current controlled specification, ordering code, marking, pin assignment, logic thresholds, electrical limits, package tolerances and qualification requirements before production release.
