SN74LVC2G34DCKR - Dual Buffer 1.65-5.5V SC-70-6 | Texas Instruments
MPN: SN74LVC2G34DCKR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.3 | $0.30 |
| 10 | $0.24 | $2.40 |
| 100 | $0.15 | $15.00 |
| 500 | $0.11 | $55.00 |
| 1,000 | $0.08 | $80.00 |
SN74LVC2G34DCKR Overview
A buffer gate is a digital logic circuit that amplifies or isolates a signal without changing its logic level. In the logic IC hierarchy, it falls under gates within the 74LVC CMOS logic family, ultimately classified as a standard logic integrated circuit. Buffers increase fan-out, drive longer PCB traces, and provide impedance isolation between a signal source and its load.
Key features include support for 5-V VCC operation, inputs tolerant up to 5.5 V regardless of supply, and a typical propagation delay (tpd) of 3.3 ns at VCC = 3.3 V. Output drive is +/-24 mA at 3.3 V, ensuring solid signal integrity. Maximum ICC is only 10 uA, making the part ideal for battery-powered designs. The device is fully specified for partial-power-down applications using Ioff circuitry, which disables outputs to prevent damaging backflow current when VCC is removed.
The SN74LVC2G34 uses a CMOS process delivering high noise immunity and low static power dissipation. Typical VOLP (output ground bounce) and VOHV (undershoot) performance keeps switching noise minimal in mixed-signal boards. NanoStar and NanoFree package technologies are available in the family for ultra-miniature footprints.
Typical applications include MCU GPIO buffering, clock distribution, level-compatible interfacing between 3.3-V and 5-V domains, and general logic isolation in consumer, industrial, and communication equipment. Pair it with TI translation parts such as TXS0102-Q1 or SN74LVC1T45 for full level shifting.
Design tip: decouple VCC with a 0.1-uF ceramic capacitor close to the pin, and keep buffered traces short and impedance-controlled to preserve the 3.3-ns speed advantage.
Drop-in alternatives for SN74LVC2G34DCKR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with SN74LVC2G34DCKR (same form factor and footprint) — differing in Logic Function, Operating Temperature, Supply Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
SN74LVC2G34DCKR-Q1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SN74AUP2G34DCKR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
74LVC2G34GW,125
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
74AUP2G34GW,125
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SN74LVC2G34DCKR Maximum Ratings & Electrical Characteristics
| Logic Function | Dual Non-Inverting Buffer (Y = A) |
| Logic Family | 74LVC (Low-Voltage CMOS) |
| Supply Voltage Range | 1.65 V to 5.5 V |
| Input Voltage Tolerance | 5.5 V max (independent of VCC) |
| Propagation Delay (tpd) | 3.3 ns typ at 3.3 V |
| Output Drive Current | +/-24 mA at 3.3 V |
| Maximum ICC | 10 uA |
| Ioff (Partial Power Down) | Supported |
| Output Type | Push-Pull |
| Number of Elements | 2 elements, 1 bit per element |
| Operating Temperature | -40C to +125C |
| Package | SC-70-6 (DCK), 2.0 mm x 1.25 mm |
| Pin Pitch | 0.65 mm |
| Mounting Type | Surface Mount |
| ESD Protection | Exceeds 2000 V HBM (MIL-STD-883 Method 3015) |
| RoHS Status | Compliant |
SN74LVC2G34DCKR Pin Configuration
| Pin 1 | 1A — Input of buffer channel 1 |
| Pin 2 | GND — Ground |
| Pin 3 | 2Y — Output of buffer channel 2 |
| Pin 4 | 2A — Input of buffer channel 2 |
| Pin 5 | 1Y — Output of buffer channel 1 |
| Pin 6 | VCC — Power supply, 1.65 V to 5.5 V |
Typical Applications
SN74LVC2G34DCKR is suitable for 6 applications: MCU GPIO Buffering, Clock Distribution, Industrial Automation I/O, Battery-Powered Portable Devices, Automotive Body Electronics, Logic Isolation in Communication Equipment.
MCU GPIO Buffering
The SN74LVC2G34DCKR provides two independent Y = A buffers that increase GPIO fan-out and isolate microcontroller pins from capacitive loads. With +/-24-mA drive at 3.3 V, one buffer channel can drive multiple LEDs, optocouplers, or long traces that an MCU pin alone cannot. The 3.3-ns typical propagation delay adds negligible timing overhead to SPI or parallel buses. Its 2.0 mm x 1.25 mm SC-70-6 package fits directly adjacent to connector headers.
Recommended
Clock Distribution
With a 3.3-ns typical propagation delay and low skew between the two channels, the SN74LVC2G34DCKR duplicates a clock source for two loads while regaining full logic swing. The push-pull output with defined VOLP/VOHV behavior minimizes ground bounce, keeping clock jitter low in mixed-signal boards. Place the buffer close to the clock source and decouple VCC with 0.1 uF to preserve edge rates.
Recommended
Industrial Automation I/O
In industrial controllers, the SN74LVC2G34DCKR buffers status signals between PLDs, MCUs, and isolation barriers. The -40C to +125C operating range and over 2000-V HBM ESD protection (MIL-STD-883 Method 3015) withstand harsh cabinet environments, while Ioff circuitry safely disables outputs during partial power-down of subsystem rails. The automotive-qualified SN74LVC2G34DCKR-Q1 extends this into relays and actuators requiring AEC-Q100 parts.
Recommended
Battery-Powered Portable Devices
A maximum ICC of only 10 uA and CMOS static operation make the SN74LVC2G34DCKR ideal for battery products where every microamp counts. The small SC-70-6 footprint conserves PCB area in wearables and handhelds. When the main rail is switched off, Ioff prevents backflow through the outputs, allowing peripherals to remain powered without draining the battery through the buffer.
Recommended
Automotive Body Electronics
For automotive modules such as lighting control and door electronics, the SN74LVC2G34DCKR-Q1 variant offers AEC-Q100 qualification in the identical SC-70-6 footprint. It buffers switch inputs and drive-enable signals between 3.3-V MCUs and higher-voltage subsystems, tolerating load-dump-adjacent transients through robust ESD protection. Designers benefit from footprint commonality when migrating consumer prototypes to qualified automotive production.
Recommended
Logic Isolation in Communication Equipment
Networking and telecom line cards use the SN74LVC2G34DCKR to isolate enable and reset signals between control planes and data-path ICs. Input tolerance to 5.5 V regardless of VCC allows mixing 3.3-V and 5-V logic domains without extra translators. The low ground bounce (VOLP) of the LVC family prevents crosstalk into adjacent high-speed serial lines on dense boards.
Recommended
Recommended Products Summary
Engineering reference data for SN74LVC2G34DCKR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN74LVC2G34DCKR-Q1 | SN74AUP2G34DCKR | 74LVC2G34GW,125 |
|---|---|---|---|---|
| Package | SC-70-6 (DCK) | SC-70-6 (DCK) - same | SC-70-6 (DCK) - same | SOT-363 (SC-70-6) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | NXP Semiconductors |
| Supply Voltage | 1.65 V to 5.5 V | 1.65 V to 5.5 V | 0.8 V to 3.6 V | 1.2 V to 5.5 V |
| Automotive Grade | No | Yes (AEC-Q100) | No | No |
| Ioff Partial Power Down | Yes | Yes | Yes | Yes |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
Key Differentiators
- Full 5.5-V supply operation with 5.5-V tolerant inputs (vs SN74AUP2G34DCKR)
- Same-footprint AEC-Q100 upgrade path (vs SN74LVC2G34DCKR-Q1)
- Cross-brand supply-chain security (vs 74LVC2G34GW,125)
Design Notes
Decouple VCC with a 0.1-uF ceramic capacitor placed within 2 mm of pin 6, with a solid via to the ground plane. The SC-70-6 footprint is small enough that trace inductance to the cap matters; keep the loop area minimal to suppress switching noise on the 24-mA output edges.
Keep buffered traces short and impedance-controlled to preserve the 3.3-ns propagation delay advantage. For traces longer than ~50 mm at fast edges, add a series 22-ohm resistor at the buffer output to damp reflections into unterminated loads and reduce EMI.
Do not exceed 5.5 V on inputs or VCC even briefly; LVC inputs tolerate 5.5 V but have no negative-rail protection, so add a series resistor if signals can undershoot below ground. Remember this device is a unidirectional buffer (Y = A): it cannot replace a bidirectional translator such as SN74LVC1T45 in I2C or shared data buses.
Compliance Information
RoHS compliant per DigiKey/TI product listings. AEC-Q100 version available as SN74LVC2G34DCKR-Q1. REACH and halogen-free status not stated in provided data.
