01 · Device purpose
Product Overview and Selection Scope
SN74LVC1G14 integrates one Schmitt-trigger inverter. A HIGH input produces a LOW output, and a LOW input produces a HIGH output.
- Wide supply range: 1.65 V to 5.5 V operation.
- Schmitt-trigger input: hysteresis improves noise immunity and slow-edge tolerance.
- 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: 0.1 µA typical ICC at +25 °C under the listed condition.
- Output drive: ±24 mA at VCC = 3.0 V under the specified DC tests.
- Partial power-down: Ioff limits current when VCC is 0 V.
Selection boundary: This device is an inverting logic gate; it is not a precision comparator, an analog threshold detector, or an automatic level translator. Input thresholds and hysteresis vary with supply voltage and must be evaluated against the actual input waveform.
02 · Logic and pins
Inverting Function, Truth Table and Pin Assignment
The Schmitt input uses a higher threshold for a rising A input and a lower threshold for a falling A input. This hysteresis reduces repeated output switching when the input is noisy 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 | 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 |
|---|---|---|---|---|---|
| SN74LVC1G14DCKR | -40 °C to +125 °C | SC70-5 / SOT353 equivalent | CFR | MSL 3 | Tape and reel, 3,000 units |
| SN74LVC1G14DBVR | -40 °C to +125 °C | SOT23-5 | C14F | 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 range | Unit |
|---|---|---|---|---|---|---|
| 1.65 V | 0.75 | 1.05 | 0.30 | 0.60 | 0.35 to 0.60 | V |
| 2.3 V | 1.25 | 1.55 | 0.35 | 0.65 | 0.60 to 1.20 | V |
| 3.0 V | 1.50 | 2.10 | 0.45 | 0.75 | 1.05 to 1.65 | V |
| 4.5 V | 2.30 | 3.00 | 0.70 | 1.00 | 1.60 to 2.00 | V |
| 5.5 V | 2.80 | 3.40 | 0.85 | 1.15 | 1.95 to 2.25 | 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 provides typical propagation-delay values only; these values are not guaranteed worst-case timing limits.
| Parameter | 1.8 V | 2.5 V | 3.3 V | 5.0 V | Condition / unit |
|---|---|---|---|---|---|
| tpd, A to Y | 7.5 | 3.6 | 3.1 | 2.7 | ns typ.; CL = 30 pF or 50 pF, RL = 500 Ω |
| Ci | 4 pF typ. at VCC = 3.3 V | VI = VCC or GND | |||
| Cpd | 20 | 21 | 22 | 25 | pF typ. 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 PDF 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 listed ΔICC test.
- 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 the IC path, 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, noise amplitude, output load, receiver levels and power sequencing across production voltage and temperature.
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 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 PCsInvert 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 and invert slow or noisy digital inputs.
Portable Media PlayersProvide compact Schmitt-trigger logic conditioning.10 · Engineering answers
SN74LVC1G14 Engineering FAQs
What function does SN74LVC1G14 implement?
It is one Schmitt-trigger inverter. Y is LOW when A is HIGH, and Y is HIGH when A is LOW.
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 are the listed propagation delays?
Typical tpd is 7.5 / 3.6 / 3.1 / 2.7 ns at 1.8 / 2.5 / 3.3 / 5.0 V respectively under the specified load conditions.
What does Ioff provide?
Ioff is specified with VCC = 0 V and VI or VO = 5.5 V, with ±10 µA maximum over the full temperature range.
Which packages are listed?
SN74LVC1G14DBVR is SOT23-5 with C14F marking. SN74LVC1G14DCKR is SC70-5 with CFR 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 summarizes the supplied SN74LVC1G14 Rev A.1 product specification for component evaluation. Confirm the current controlled specification, ordering code, marking, pin assignment, limits, package tolerances and qualification requirements before production release.
