SN74LVC2G17 - Dual Schmitt-Trigger Buffer 5.5V | Texas Instruments
MPN: SN74LVC2G17 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.42 | $0.42 |
| 10 | $0.34 | $3.40 |
| 100 | $0.25 | $25.00 |
| 500 | $0.19 | $95.00 |
| 1,000 | $0.15 | $150.00 |
SN74LVC2G17 Overview
A Schmitt-trigger buffer is a digital logic gate that uses positive feedback to create different input thresholds for rising (VT+) and falling (VT-) signals. This hysteresis eliminates false triggering from noise or slow input edges, making Schmitt buffers essential for conditioning noisy signals, debouncing mechanical switches, and squaring up slow-rise-time waveforms. The SN74LVC2G17 belongs to the LVC logic family, part of the broader low-voltage CMOS buffer and line-driver category in the logic IC hierarchy.
Key features include a wide supply range of 1.65 V to 5.5 V, 5.5-V input tolerance for mixed-voltage interfacing, and a maximum propagation delay (tpd) of 3.3 ns at 3.3 V. Output drive is ±24 mA at 3.3 V with a push-pull stage providing rail-to-rail output swing. Maximum ICC is 10 uA, enabling low-power designs, and the Ioff feature fully supports partial-power-down operation by preventing damaging backflow current when VCC is removed.
Architecturally, the device uses a CMOS process with comparator-based Schmitt input circuits that guarantee stable switching even with very slow input transitions. Typical VOLP (output ground bounce) and VOHV (output VOH undershoot) are specified at 25C to characterize system-level signal integrity. Both an automotive SN74LVC2G17-Q1 (AEC-Q100 qualified) variant and the enhanced SN74LVC2G17-EP for demanding applications are available.
Typical applications include switch debouncing, sensor signal conditioning, level shifting between 3.3-V and 5-V logic domains, and buffering of slow or noisy signals in industrial, consumer, and automotive electronics.
Design tip: leverage the hysteresis characteristics for your noise environment and observe proper power sequencing - Ioff supports partial power-down, but unintended current paths should still be avoided.
Drop-in alternatives for SN74LVC2G17 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
SN74LVC2G17-Q1
✅ Drop-In📋 Reference alternative (not in catalog)
SN74LVC2G17-EP
✅ Drop-In📋 Reference alternative (not in catalog)
74LVC2G17
✅ Drop-In📋 Reference alternative (not in catalog)
74LVC2G17GV
✅ Drop-In📋 Reference alternative (not in catalog)
74LVC2G17
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SN74AUP2G17
⚡ Same Package📋 Reference alternative (not in catalog)
SN74LVC2G17 Maximum Ratings & Electrical Characteristics
| Logic Function | Dual Schmitt-Trigger Buffer (Y = A) |
| Number of Channels | 2 |
| Bits per Element | 1 |
| Supply Voltage Range | 1.65 V to 5.5 V |
| Input Voltage Tolerance | 5.5 V max |
| Max Propagation Delay (tpd) | 3.3 ns at 3.3 V |
| Output Drive | ±24 mA at 3.3 V |
| Output Type | Push-Pull, Non-Inverting |
| Quiescent Current (ICC) | 10 uA max |
| Partial Power Down (Ioff) | Yes |
| Typical VOLP (Ground Bounce) | 0.8 V max at VCC = 3.3 V, 25C |
| Operating Temperature | -40C to +125C |
| Package | SOT-23-6 (DBV), SON-6 (DRY), NanoStar (YEP) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Input Hysteresis | Schmitt-trigger (VT+ / VT- differential) |
SN74LVC2G17 Pin Configuration
| Pin 1 | 1A — Data input, channel 1 (Schmitt-trigger) |
| Pin 2 | GND — Ground |
| Pin 3 | 2A — Data input, channel 2 (Schmitt-trigger) |
| Pin 4 | 2Y — Data output, channel 2 (push-pull) |
| Pin 5 | VCC — Power supply, 1.65 V to 5.5 V |
| Pin 6 | 1Y — Data output, channel 1 (push-pull) |
Typical Applications
SN74LVC2G17 is suitable for 6 applications: Switch Debouncing, Level Shifting 3.3V to 5V Logic, Slow Signal Conditioning for MCUs, Industrial Noise-Immune Signaling, Automotive ECU Digital Interfaces, Portable and Battery-Powered Devices.
Switch Debouncing
Mechanical switch contacts bounce for milliseconds after closure, producing multiple logic edges. The SN74LVC2G17's Schmitt-trigger input hysteresis (distinct VT+ and VT- thresholds) converts these noisy transitions into single clean edges. Paired with an RC filter (e.g., 10k + 100nF) at the input, the buffer squares up the slow exponential waveform with guaranteed stability over the full 1.65-V to 5.5-V supply range and ±24-mA output drive for downstream logic.
Recommended
Level Shifting 3.3V to 5V Logic
In mixed 3.3-V/5-V systems, the SN74LVC2G17 accepts 5.5-V-max inputs regardless of VCC, so a 3.3-V-driven input can drive a 5-V-supplied buffer output. Because it is a buffer, the output swings rail-to-rail to the higher domain, meeting 5-V CMOS VIH levels (~70% of VCC). The Ioff feature lets 5-V rails stay live during 3.3-V partial power-down without backflow damage - critical for sequenced multi-rail boards.
Recommended
Slow Signal Conditioning for MCUs
Sensor outputs with slow rise times (photodiode transimpedance nodes, RC-filtered comparators, long cables) can oscillate ordinary CMOS inputs. The SN74LVC2G17's comparator-based Schmitt input guarantees a single output transition even for near-DC input ramps. With 3.3-ns max tpd at 3.3 V, timing penalty is negligible, and the push-pull output directly drives MCU GPIO or timer capture inputs without external pull resistors.
Recommended
Industrial Noise-Immune Signaling
Factory environments couple motor-switching transients onto signal lines. The SN74LVC2G17's hysteresis provides tens of millivolts of noise immunity at the threshold region, and its ±24-mA output re-drives signals degraded by cable capacitance. Operating from -40C to +125C and available as the SN74LVC2G17-Q1 (AEC-Q100) or -EP enhanced variant, it covers harsh-environment industrial control and instrumentation requirements.
Recommended
Automotive ECU Digital Interfaces
The AEC-Q100-qualified SN74LVC2G17-Q1 conditions sensor and switch inputs in 12-V automotive systems, translating through resistor dividers to the 1.65-V to 5.5-V logic domain. Its 5.5-V input tolerance handles load-dump-clamped signals, hysteresis rejects wiring-harness noise, and Ioff supports the partial power-down states typical in CAN/LIN node sleep architectures used across body, powertrain, and chassis ECUs.
Recommended
Portable and Battery-Powered Devices
With 10-uA maximum ICC and operation down to 1.65 V, the SN74LVC2G17 fits single-cell Li-ion and 2x-AA portable products where every microamp matters. The tiny SOT-23-6 (DBV) and sub-2mm2 SON-6 (DRY) packages conserve PCB area. It debounces power buttons, buffers wake-up signals to PMIC enable pins, and squares up charger-detect waveforms while drawing negligible static load from the battery.
Recommended
Recommended Products Summary
Engineering reference data for SN74LVC2G17 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN74LVC2G17-Q1 | SN74LVC2G17-EP | 74LVC2G17GV | SN74AUP2G17 |
|---|---|---|---|---|---|
| Package | SOT-23-6 (DBV) | SOT-23-6 (DBV) - same | SOT-23-6 (DBV) - same | SOT-23-6 - same | SOT-23-6 (DBV) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Nexperia | Texas Instruments |
| Supply Voltage Range | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 0.8 V to 3.6 V |
| Output Drive | ±24 mA at 3.3 V | ±24 mA at 3.3 V | ±24 mA at 3.3 V | ±24 mA at 3.0 V | ±4 mA at 3.0 V |
| Qualification | Standard (commercial/industrial) | AEC-Q100 automotive | Enhanced product | Standard | Standard |
| Partial Power Down (Ioff) | Yes | Yes | Yes | Yes (IOFF) | Yes |
Key Differentiators
- Wide 1.65-V to 5.5-V supply with 5.5-V input tolerance (vs SN74AUP2G17)
- Automotive drop-in variant (vs 74LVC2G17GV)
- Ioff partial-power-down support (vs SN74LVC2G17-EP)
Design Notes
Do not exceed 5.5 V on inputs even though VCC tolerance is 5.5 V - input clamp behavior above this absolute maximum damages the Schmitt input stage. When translating from 24-V industrial signals, always use a resistor divider before the buffer input. Verify VT+/VT- hysteresis at your actual VCC from the datasheet table, since thresholds scale with supply and 1.8-V operation leaves less noise margin than 5-V operation.
Place a 100-nF ceramic decoupling capacitor within 2 mm of the VCC pin. For push-pull outputs driving cables or high-fanout loads, add bulk capacitance (1-uF) nearby to supply the ±24-mA transient current and reduce VOLP ground bounce. Keep the GND return path short; the DRY (SON-6) package has minimal lead inductance for the lowest bounce in high-speed clock buffering.
The Ioff circuit enables partial power-down but does not protect against back-powering through the input above 5.5 V. In multi-rail systems, sequence VCC before applying input signals above ground-referenced limits, or rely on the 5.5-V input tolerance with rails present. With 10-uA max ICC, static battery drain is negligible, but dynamic ICC scales with input frequency - estimate total using the datasheet dynamic power equation for MHz clock buffering.
Use the Schmitt hysteresis intentionally: for a 3.3-V rail, the threshold gap provides defined immunity to ripple riding on threshold-level signals. For very slow edges (>1 ms), confirm input leakage effects on the divider impedance driving 1A/2A. Outputs are not 5-V tolerant above VCC - do not use this part to interface a 5-V output into a 3.3-V-supplied buffer; instead power VCC at 5 V or select a dual-supply translator.
Compliance Information
RoHS compliant per TI product page. AEC-Q100 qualification applies to the SN74LVC2G17-Q1 variant only. REACH/halogen-free status not stated in provided data.
