01 · Device purpose
Product Overview and Selection Scope
SN74LVC1G17 integrates one non-inverting Schmitt-trigger buffer. In positive logic, Y follows A.
- Wide supply range: operation from 1.65 V to 5.5 V.
- Schmitt-trigger input: separate switching thresholds improve tolerance to slow or noisy input transitions.
- Input range up to 5.5 V: VI is specified from 0 V to 5.5 V across the recommended operating range.
- Low static power: ICC is 0.1 µA typical at +25 °C under the specified test condition.
- Output drive: ±24 mA at VCC = 3.0 V under the specified DC test conditions.
- Partial power-down: Ioff limits current through the device when VCC = 0 V.
Selection boundary: This device is a non-inverting logic buffer; it is not a precision comparator, analog threshold detector, or dual-supply level translator. Input thresholds and hysteresis vary with supply voltage and must be evaluated against the actual input waveform.
02 · Logic and pins
Non-Inverting Function, Truth Table and Pin Assignment
The Schmitt-trigger input uses VT+ for a positive-going transition and VT- for a negative-going transition. The resulting hysteresis reduces repeated output switching when noise is present near the threshold.
| Pin | Name | Type | Function | Engineering note |
|---|---|---|---|---|
| 1 | N.C. | - | Not connected | Do not use as an electrical connection. |
| 2 | A | Input | Schmitt-trigger logic input | Hold at VCC or GND when unused. |
| 3 | GND | Power | Ground | Use a short local return path. |
| 4 | Y | Output | Non-inverting output | Check load and receiver thresholds. |
| 5 | VCC | Power | Supply | Place local bypass capacitance close to pins 5 and 3. |
03 · Orderable options
Ordering Codes and Package Selection
| Ordering number | Temperature range | Package | Top marking | MSL | Packing |
|---|---|---|---|---|---|
| SN74LVC1G17DCKR | -40 °C to +125 °C | SC70-5 / SOT353 equivalent | C75 | MSL 3 | Tape and reel, 3,000 units |
| SN74LVC1G17DBVR | -40 °C to +125 °C | SOT23-5 | C17J | 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
Recommended conditions define the functional design range. Absolute maximum ratings are stress limits only; operation at those limits is not implied.
| Parameter | Condition | Minimum | Maximum | Unit |
|---|---|---|---|---|
| Supply voltage, VCC | Operating | 1.65 | 5.5 | V |
| Supply voltage, VCC | Data retention only | 1.5 | Not specified | 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 | Condition | 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 | VI or VO < 0 V | -50 | mA | |
| Continuous output current | IO | ±50 | mA | |
| Continuous VCC or GND current | - | ±100 | mA | |
| Junction temperature | TJ | -65 | 150 | °C |
| Storage temperature | Tstg | -65 | 150 | °C |
05 · Static performance
Schmitt Thresholds, Hysteresis and DC Characteristics
| VCC | VT+ minimum | VT+ maximum | VT- minimum | VT- maximum | ΔVT minimum | ΔVT maximum | Unit |
|---|---|---|---|---|---|---|---|
| 1.65 V | 0.75 | 1.05 | 0.30 | 0.60 | 0.30 | 0.70 | V |
| 2.3 V | 1.25 | 1.55 | 0.60 | 0.90 | 0.35 | 0.75 | V |
| 3.0 V | 1.50 | 2.10 | 0.90 | 1.20 | 0.50 | 1.00 | V |
| 4.5 V | 2.30 | 3.00 | 1.35 | 1.75 | 0.80 | 1.30 | V |
| 5.5 V | 2.80 | 3.40 | 1.65 | 2.00 | 1.00 | 1.60 | V |
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 | A = 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 | Input at VCC - 0.6 V | 3 V to 5.5 V | 500 µA maximum | µA |
06 · Dynamic performance
AC Switching and Simplified Test Conditions
The specification lists propagation delay in the TYP column over the full operating-temperature range. These values are characterization data, not guaranteed worst-case timing limits. Apply the stated supply tolerance and load conditions.
| Parameter | 1.8 V | 2.5 V | 3.3 V | 5.0 V | Condition / unit |
|---|---|---|---|---|---|
| tpd, A to Y | 21 | 7.8 | 5.7 | 4.2 | ns typ.; CL = 30 pF or 50 pF, RL = 500 Ω |
| Ci | 4 pF typical at VCC = 3.3 V | VI = VCC or GND | |||
| Cpd | 21 | 22 | 22 | 25 | pF typical at f = 10 MHz |
07 · Implementation
Slow Inputs, Noise Margin and PCB Guidance
- Use hysteresis deliberately: compare the source waveform against both VT+ and VT-, not a single nominal threshold.
- Do not leave A floating: the specification requires unused inputs to be held at VCC or GND.
- Watch mid-rail current: an input near VCC - 0.6 V can increase supply current under the specified ΔICC test condition.
- Validate slow or noisy sources: hysteresis prevents repeated transitions inside the band, but noise excursions that cross both thresholds can still switch the output.
- Validate partial power-down: Ioff limits current through the device, while other board paths can still back-power the rail.
- Keep the supply loop compact: place local bypass capacitance close to VCC and GND, and use short return paths.
System check: Validate thresholds, hysteresis, input slew rate, noise amplitude, output loading, receiver logic levels, and power sequencing across the full production voltage and temperature range.
08 · Mechanical
SOT23-5 and SC70-5 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 | SOT23-5 | SC70-5 | 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 thickness c | 0.100 to 0.200 | 0.080 to 0.150 | 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.
AV Receivers and Home TheatersCondition slow or noisy control signals before downstream logic.
Blu-ray PlayersRestore clean digital transitions in compact media systems.
Desktop and Notebook PCsBuffer and clean board-level status or control signals.
Digital Video CamerasCondition compact low-voltage digital interfaces.
Mobile PhonesUse for small low-power logic conditioning paths.
Personal Navigation DevicesClean slow or noisy digital inputs without inversion.
Portable Media PlayersProvide compact Schmitt-trigger logic conditioning.10 · Engineering answers
SN74LVC1G17 Engineering FAQs
What function does SN74LVC1G17 implement?
It is a single non-inverting Schmitt-trigger buffer. In positive logic, Y follows A.
Why are there two input thresholds?
A rising input switches at VT+; a falling input switches at VT-. The difference ΔVT is the hysteresis band that improves noise tolerance.
What supply range is recommended?
VCC is specified from 1.65 V to 5.5 V for operation. The PDF lists 1.5 V for data retention only and does not state an upper limit in that row.
Can the input accept 5.5 V when VCC is lower?
The recommended input range is 0 V to 5.5 V. Verify the output level against the receiving logic at the actual supply.
What propagation-delay values are listed?
Typical tpd is 21 / 7.8 / 5.7 / 4.2 ns at 1.8 / 2.5 / 3.3 / 5.0 V, respectively, under the stated full-temperature load conditions. The PDF does not specify maximum propagation-delay limits.
What does Ioff provide?
Ioff is specified with VCC = 0 V and VI or VO = 5.5 V; the maximum is ±10 µA over the full operating-temperature range.
Which packages are listed?
SN74LVC1G17DBVR is SOT23-5 with C17J marking. SN74LVC1G17DCKR is SC70-5 with C75 marking. Both are MSL 3 and tape-and-reel packed in quantities of 3,000.
Can the input be left open?
No. Every unused input must be held at VCC or GND.
This page is an engineering summary of the supplied SN74LVC1G17 Rev A.1 product specification and does not replace the complete controlled document. Confirm the current controlled specification, ordering code, marking, pin assignment, limits, package tolerances and qualification requirements before production release.
