SN74LVC2G34DCKR - Dual Buffer 1.65-5.5V SC-70 | TI
MPN: SN74LVC2G34DCKR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.32 | $0.32 |
| 10 | $0.26 | $2.60 |
| 100 | $0.14 | $14.00 |
| 500 | $0.11 | $55.00 |
| 1,000 | $0.09 | $90.00 |
Drop-in alternatives for SN74LVC2G34DCKR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
SN74AUC2G34DCKR
β Drop-Inπ Reference alternative (not in catalog)
SN74LVC1G34DCKR
β Drop-Inπ Reference alternative (not in catalog)
SN74LVC2G17DCKR
β‘ Same Packageπ Reference alternative (not in catalog)
SN74AUP1T34-Q1
β‘ Same Packageβ In Stock
$0.18 / Unit
View Datasheet β74LVC2G34GW,125
β Drop-Inπ Reference alternative (not in catalog)
NL27WZ16US
β Drop-Inπ Reference alternative (not in catalog)
SN74LVC2G34DCKR Maximum Ratings & Electrical Characteristics
| Logic Function | Dual Non-Inverting Buffer (Y = A) |
| Supply Voltage Range | 1.65 V to 5.5 V |
| Input Voltage Range | up to 5.5 V |
| Propagation Delay (tpd) | 3.3 ns typical at 3.3 V |
| Output Drive | +/-24 mA at 3.3 V |
| Max ICC | 10 uA |
| Output Type | Push-Pull |
| Channels | 2 Element, 1 Bit per Element |
| Ioff Feature | Yes (partial-power-down support) |
| Package | SC-70-6 (DCK), 2.0 mm x 1.25 mm |
| Pin Pitch | 0.65 mm |
| Technology | CMOS (74LVC family) |
| Mounting Type | Surface Mount |
| Operating Temperature | [DATA_NEEDED: operating temperature range] |
| RoHS Status | Compliant |
SN74LVC2G34DCKR Pin Configuration
| Pin 1 | 1A β Channel 1 input |
| Pin 2 | GND β Ground |
| Pin 3 | 2A β Channel 2 input |
| Pin 4 | 2Y β Channel 2 output |
| Pin 5 | VCC β Power supply, 1.65 V to 5.5 V |
| Pin 6 | 1Y β Channel 1 output |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
SN74LVC2G34DCKR is suitable for 6 applications: MCU GPIO Buffering, Clock Distribution, 3.3V to 5V Signal Interfacing, Industrial Control Logic Isolation, Automotive Module Signal Conditioning, Consumer and Portable Electronics.
MCU GPIO Buffering
The SN74LVC2G34DCKR provides two independent buffer channels to isolate and drive signals from a microcontroller to external peripherals. Its 1.65-V to 5.5-V operating range matches common MCU I/O voltages, and the +/-24-mA output drive at 3.3 V ensures reliable edges even with capacitive loads. The 10-uA max ICC suits battery-powered MCU boards. Place the buffer close to the MCU pin and decouple VCC with 0.1 uF to preserve the 3.3-ns tpd advantage.
Recommended
Clock Distribution
With 3.3-ns typical propagation delay and push-pull outputs, the SN74LVC2G34DCKR fans out clock signals to multiple loads with minimal skew between its two channels. The Ioff feature prevents clock glitches during multi-rail power sequencing. For clean edges, keep buffered clock traces short, impedance-controlled, and avoid stubs; the +/-24-mA drive comfortably drives a 15-pF load at typical logic clock rates without excessive rise-time degradation.
Recommended
3.3V to 5V Signal Interfacing
Operating at VCC = 5 V, the SN74LVC2G34DCKR accepts 3.3-V logic inputs (input tolerance up to 5.5 V) and produces full 5-V output swings, providing simple one-way up-translation between logic domains. This eliminates a dedicated translator in unidirectional links such as enable signals or status flags. For bidirectional buses, pair with TXS0102-Q1 instead; the LVC buffer remains ideal for speed-critical one-way 5-V handshake lines.
Recommended
Industrial Control Logic Isolation
In industrial PLC and motor-control boards, the SN74LVC2G34DCKR buffers noisy sensor and enable signals before they reach sensitive controller inputs. The CMOS 74LVC process provides strong noise immunity, while the Ioff partial-power-down spec protects the device when subsystem rails are cycled independently. Its dual channels in a 2 mm x 1.25 mm footprint save board area versus discrete transistor isolation stages and keep BOM cost below $0.10 at volume.
Recommended
Automotive Module Signal Conditioning
The wide 1.65-V to 5.5-V supply range and 5.5-V input tolerance let the SN74LVC2G34DCKR ride through automotive rail transients when used with proper upstream protection. It buffers sensor and switch inputs in body-control and gateway modules. For safety-relevant paths, select the -Q1 qualified TI variants in the same footprint families; pair with TLIN821-Q1 or TCAN1042GVDRQ1 for LIN/CAN physical-layer signal chains buffered by this dual gate.
Recommended
Consumer and Portable Electronics
The 10-uA maximum ICC and tiny SC-70 footprint make the SN74LVC2G34DCKR well suited to battery-powered consumer devices such as remote controls, wearables, and small appliances. It buffers push-button inputs, LED enable lines, and status flags between the MCU andε€ε΄ loads. The dual-channel package replaces two single gates, cutting placement cost. Keep unused inputs tied to VCC or GND per the datasheet to avoid floating-input oscillation and excess current draw.
Recommended
Recommended Products Summary
Engineering reference data for SN74LVC2G34DCKR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN74AUC2G34DCKR | SN74LVC1G34DCKR | 74LVC2G34GW,125 | NL27WZ16US |
|---|---|---|---|---|---|
| Package | SC-70-6 (DCK) | SC-70-6 (DCK) - same | SC-70-6 (DCK) - same | SC-88A (SOT353) - same class | SC-70-6 (SOT353) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Nexperia | onsemi |
| Channels | 2 (dual buffer) | 2 | 1 | 2 | 2 |
| Supply Voltage Range | 1.65 V to 5.5 V | 0.8 V to 2.7 V | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 1.65 V to 5.5 V |
| Output Drive | +/-24 mA at 3.3 V | [DATA_NEEDED] | +/-24 mA at 3.3 V | [DATA_NEEDED] | [DATA_NEEDED] |
| Propagation Delay | 3.3 ns typical at 3.3 V | [DATA_NEEDED] | ~3.3 ns typical | [DATA_NEEDED] | [DATA_NEEDED] |
| Ioff Feature | Yes | Yes | Yes | [DATA_NEEDED] | [DATA_NEEDED] |
| Max ICC | 10 uA | [DATA_NEEDED] | 10 uA | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Dual channels in one SC-70 package (vs SN74LVC1G34DCKR)
- Wider 5.5-V operating range than AUC family (vs SN74AUC2G34DCKR)
- Ioff partial-power-down support (vs 74LVC2G34GW,125)
Design Notes
Place a 0.1-uF ceramic decoupling capacitor within 2 mm of the VCC pin (pin 5), with a solid ground connection at pin 2. SC-70 pads require short, direct traces; the compact thermal pad-less package dissipates negligible power, so no thermal copper is needed. Tie unused input pins to VCC or GND - never leave 74LVC inputs floating, as floating inputs can oscillate and raise ICC well above the 10-uA spec.
The 3.3-ns tpd allows fast edges that can ring on long unterminated traces. Keep buffered traces under 10 cm or add a 22-33 ohm series resistor at the buffer output for line damping. The +/-24-mA drive easily overdrives small loads, so series damping also limits ground bounce; the datasheet's typical VOLP (output ground bounce) specification indicates good behavior with proper layout.
Do not exceed 5.5 V on VCC or inputs, including transient overshoot. When using the part as a 3.3-V-to-5-V up-translator, confirm the driving device meets LVC input VIH levels at the chosen VCC. During partial power-down, rely on Ioff rather than input protection diodes - the Ioff spec covers this condition; applying output voltage above VCC beyond datasheet limits still voids reliability expectations.
Compliance Information
RoHS compliant per TI product page. AEC-Q100 qualification not indicated for the standard SN74LVC2G34; use TI Q1-family logic for automotive qualification requirements.
