01 · Device purpose
Product Overview and Selection Scope
SN74LVC2G17 contains two independent non-inverting Schmitt-trigger buffers 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.
- Schmitt-trigger behavior: separate VT+ and VT- thresholds provide specified hysteresis.
- Slow/noisy input tolerance: hysteresis improves switching stability around the input threshold region.
- 5.5 V input acceptance: both inputs are specified from 0 V to 5.5 V.
- Output drive: ±24 mA at VCC = 3.0 V under the specified DC tests.
- Partial power-down: Ioff helps prevent damaging current backflow while powered down.
Selection boundary: This device has two non-inverting Schmitt-trigger channels with actively driven outputs. It is not a plain-threshold buffer, open-drain output, tri-state driver or analog comparator.
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 Schmitt input | Do not leave floating. |
| 2 | GND | Power | Ground | Use a short local return path. |
| 3 | 2A | Input | Channel 2 Schmitt 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 |
|---|---|---|---|---|---|
| SN74LVC2G17DCKR | -40 °C to +125 °C | SC70-6 / SOT363 equivalent | C7R | MSL 3 | Tape and reel, 3,000 units |
| SN74LVC2G17DBVR | -40 °C to +125 °C | SOT23-6 | C175 | 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 | Condition | Minimum | Maximum | Unit |
|---|---|---|---|---|
| Supply voltage, VCC | Operating | 1.65 | 5.5 | V |
| Supply voltage, VCC | Data retention only | 1.5 | - | V |
| Input voltage, VI | Operating | 0 | 5.5 | V |
| Output voltage, VO | Operating | 0 | VCC | V |
| Ambient temperature, TA | 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 · Schmitt and static performance
Input Thresholds, Hysteresis and DC Characteristics
| VCC | VT+ range | VT- range | Hysteresis ΔVT range | Unit |
|---|---|---|---|---|
| 1.65 V | 0.75 to 1.05 | 0.30 to 0.60 | 0.30 to 0.70 | V |
| 2.3 V | 1.25 to 1.55 | 0.60 to 0.90 | 0.35 to 0.75 | V |
| 3.0 V | 1.50 to 2.10 | 0.90 to 1.20 | 0.50 to 1.00 | V |
| 4.5 V | 2.30 to 3.00 | 1.35 to 1.75 | 0.80 to 1.30 | V |
| 5.5 V | 2.80 to 3.40 | 1.65 to 2.00 | 1.00 to 1.60 | V |
Output levels and 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 | Input 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 |
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 | 21 | 7.8 | 5.7 | 4.2 | Typical ns; CL = 30 pF or 50 pF, full temperature range |
| Input capacitance, Ci | 4 pF | Typical at VCC = 3.3 V | |||
| Power-dissipation capacitance, Cpd | 21 | 22 | 22 | 25 | Typical pF at 10 MHz, +25 °C |
Timing interpretation: Propagation values depend on supply and output load. Schmitt hysteresis improves input switching stability but does not remove the need to validate noise amplitude, edge behavior and system timing.
07 · Implementation
Input Conditioning, Output Loading and PCB Guidance
- Use both threshold limits: confirm the source crosses VT+ on a rising transition and VT- on a falling transition.
- Check noise margin: ensure noise near the thresholds cannot create unwanted state changes.
- Do not leave inputs floating: hold every unused input at a defined logic level.
- Avoid output contention: 1Y and 2Y actively drive HIGH and LOW.
- Budget fan-out: check VOH, VOL, output current and cumulative receiver capacitance.
- Use Ioff correctly: partial-power-down support reduces backflow through the outputs, but board-level paths still require validation.
- Bypass locally: place suitable ceramic capacitance close to VCC and GND.
System check: Validate threshold crossings, hysteresis, propagation delay, output loading, power sequencing, ESD protection and signal integrity in the finished design.
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 ReceiversClean slow or noisy control transitions before digital logic.
Blu-ray and Home TheaterCondition button, detect and control signals in audio-video hardware.
Desktop and Notebook PCsRestore clean logic edges from slow board-level sources.
Digital Video CamerasCondition compact sensor and control interfaces.
Mobile PhonesProvide two small hysteretic buffer channels.
GPS NavigationImprove switching reliability in portable navigation equipment.
Portable Media PlayersCondition low-voltage control signals in battery-powered hardware.10 · Engineering answers
SN74LVC2G17 Engineering FAQs
What function does SN74LVC2G17 implement?
It provides two independent non-inverting buffers. Each output follows its corresponding input.
Why are the inputs called Schmitt-trigger inputs?
Positive-going and negative-going transitions use different thresholds, creating hysteresis that improves tolerance of slow or noisy signals.
What supply range is recommended?
VCC is specified from 1.65 V to 5.5 V for operation.
What hysteresis is specified at 3 V?
The full-range ΔVT limits at VCC = 3 V are 0.50 V minimum and 1.00 V maximum.
What is the propagation delay?
The PDF lists typical propagation values of 21 ns at 1.8 V, 7.8 ns at 2.5 V, 5.7 ns at 3.3 V and 4.2 ns at 5 V under the stated load conditions.
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?
SN74LVC2G17DBVR is SOT23-6 with C175 marking. SN74LVC2G17DCKR is SC70-6 with C7R 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 SN74LVC2G17 Rev A.1 product specification for component evaluation. Confirm the current controlled specification, ordering code, marking, pin assignment, threshold limits, electrical limits, package tolerances and qualification requirements before production release.
