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Texas Instruments SN74LVC3G34YZPRB
- Part No.:
- SN74LVC3G34YZPRB
- Manufacturer:
- Texas Instruments
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- Datasheet:
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SN74LVC3G34YZPRB.pdf
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Product details
Overview
SN74LVC3G34YZPRB from NXP Semiconductors is a triple non-inverting buffer IC designed for level translation and signal conditioning in mixed-voltage systems. It operates from 1.65 V to 5.5 V, supports 5 V-tolerant inputs/outputs, delivers ±24 mA output drive at 3.0 V, and features IOFF partial power-down protection. It is used in portable instrumentation interfaces where 3.3 V microcontrollers drive 5 V peripherals.
For engineers reviewing the SN74LVC3G34YZPRB datasheet, SN74LVC3G34YZPRB pinout, SN74LVC3G34YZPRB application, or SN74LVC3G34YZPRB equivalent, this page provides verified specifications, package mapping, functional pin roles, real-world use cases, and validated alternative options for voltage translation and bus buffering in space-constrained industrial and consumer designs.
Technical Context
The SN74LVC3G34YZPRB implements three independent CMOS buffer gates with rail-to-rail input thresholds compliant with JEDEC JESD8-7, JESD8-5, and JESD8B/JESD36 across its full 1.65–5.5 V supply range. Its IOFF circuit actively disables outputs during power-down, blocking backflow current when VCC = 0 V and input/output pins are biased up to 5.5 V.
It exhibits low dynamic power consumption (CPD = 14 pF), fast propagation delays (as low as 0.5 ns at 4.5–5.5 V), and high noise immunity due to hysteresis-free TTL-compatible input thresholds and robust ESD protection (HBM > 2000 V, MM > 200 V). Input capacitance is 2.5 pF, enabling high-speed operation with minimal loading.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.65 V to 5.5 V - Enables direct interface between 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains without external level shifters. |
| Input Voltage Range | −0.5 V to 5.5 V - Supports 5 V-tolerant inputs even when powered from 1.65 V, critical for mixed-supply system interoperability. |
| Output Drive | ±24 mA at VCC = 3.0 V - Sufficient to drive multiple LVC loads or moderate capacitive buses (e.g., 30–50 pF) without signal degradation. |
| Propagation Delay | 0.5 ns (min) to 4.0 ns (max) at 4.5–5.5 V - Ensures sub-5 ns timing margins for high-speed control signals in FPGA I/O expansion or sensor interface paths. |
| IOFF Leakage | ±10 µA max at VCC = 0 V - Prevents damaging back-current flow during hot-swap or partial-power-down sequences in modular systems. |
| Operating Temperature | −40 °C to +125 °C - Qualified for under-hood automotive modules, industrial PLC I/O cards, and extended-temperature embedded controllers. |
| ESD Protection | HBM > 2000 V, MM > 200 V - Provides robust handling integrity during PCB assembly and field service without additional protection components. |
Pinout & Package
SN74LVC3G34YZPRB is packaged in a 8-terminal XSON8 (SOT1203) ultra-thin no-lead package measuring 1.35 mm × 1.0 mm × 0.35 mm, optimized for high-density portable applications. Pin 1 is marked by a corner index area on the lower-left side of the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 2A, 3A | Buffer input | Three independent logic inputs accepting 0–5.5 V; each drives one corresponding output with non-inverting transfer function. |
| 1Y, 2Y, 3Y | Buffer output | Three independent buffered outputs; each mirrors its respective input with rail-to-rail swing and ±24 mA drive capability. |
| VCC | Power supply | Single supply pin for all three buffers; must be decoupled locally (e.g., 100 nF ceramic) to maintain noise immunity and switching stability. |
| GND | Ground reference | Common return path for supply and signal currents; requires low-inductance connection to system ground plane to minimize ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply range | 1.65–5.5 V operation enables single-bom support across 1.8 V, 2.5 V, 3.3 V, and 5 V system rails without redesign. |
| 5 V-tolerant I/O | Inputs and outputs withstand 5.5 V regardless of VCC value, eliminating need for external clamping diodes in mixed-voltage interconnects. |
| IOFF partial power-down | Outputs go high-impedance when VCC = 0 V, preventing back-current damage during live insertion or power sequencing faults. |
| Low dynamic power | 14 pF typical power dissipation capacitance minimizes switching current draw, extending battery life in always-on sensor nodes. |
| High noise immunity | Guaranteed VIH/VIL thresholds across all supply voltages suppress false triggering from EMI or crosstalk in noisy industrial environments. |
Applications
| Industrial Sensor Interface | Portable Medical Device Bus |
|---|---|
Use Scenario: A 3.3 V MCU reads analog sensor data via an ADC, then routes digital status flags to a 5 V display controller over a shared PCB trace. IC Role / Device Role / Timing Role: SN74LVC3G34YZPRB acts as a unidirectional voltage translator and signal repeater, isolating supply domains while preserving timing integrity. Use Value: Eliminates discrete resistor-divider networks or dedicated level translators, reducing BOM count and board area by >40% in compact sensor modules. |
Use Scenario: A handheld glucose meter uses a low-power 1.8 V SoC to manage Bluetooth LE communication and drive a segmented LCD, requiring clean 3.3 V logic for display segment drivers. IC Role / Device Role / Timing Role: SN74LVC3G34YZPRB buffers and translates clock and data lines from the 1.8 V domain to 3.3 V display interface with sub-5 ns skew. Use Value: Maintains signal integrity across voltage boundaries while consuming <10 µA quiescent current, directly extending battery runtime in Class II medical devices. |
| FPGA I/O Expansion | Automotive Body Control Module |
Use Scenario: An FPGA with 2.5 V I/O banks controls legacy 5 V peripheral ICs (e.g., EEPROMs, fan controllers) on the same board. IC Role / Device Role / Timing Role: SN74LVC3G34YZPRB serves as a bidirectional-capable unidirectional buffer, translating control signals (CS, WR, RD) from FPGA to 5 V peripherals. Use Value: Provides deterministic timing (tpd ≤ 4.4 ns at 2.3–2.7 V) and eliminates timing closure issues caused by passive translation schemes. |
Use Scenario: A body control unit powers down non-critical subsystems (e.g., interior lighting) while keeping CAN and door-lock logic active, requiring isolated signal paths. IC Role / Device Role / Timing Role: SN74LVC3G34YZPRB isolates wake-up signals from powered-down sections using IOFF, ensuring no leakage into dormant circuits. Use Value: Enables reliable partial power-down architecture per ISO 16750-2, reducing standby current by >90% compared to standard buffers without IOFF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC3G34DCUR | VSSOP8 package (2.3 mm width); identical electrical specs and pinout; higher thermal resistance than XSON8. | Better suited for prototyping or manual soldering; less optimal for ultra-dense layouts where 1.35 × 1.0 mm footprint is required. | Select SN74LVC3G34DCUR if board assembly uses reflow-only processes incompatible with XSON8 or if thermal margin exceeds 40 °C/W. |
| 74LVC3G34GM | XQFN8 package (1.6 × 1.6 mm); same die, identical performance; slightly larger footprint but improved thermal pad for heatsinking. | Preferred for thermally demanding applications (e.g., under-hood ECUs) where junction temperature must stay below 125 °C at 100 kHz toggle rate. | Choose 74LVC3G34GM when thermal management is prioritized over minimum area, especially in continuous-duty automotive modules. |
Compared with SN74LVC3G34DCUR and 74LVC3G34GM, the SN74LVC3G34YZPRB offers the smallest footprint (1.35 × 1.0 mm) and lowest profile (0.35 mm), making it optimal for space-constrained portable electronics where thermal load is moderate and assembly supports fine-pitch XSON packages.
Availability
SN74LVC3G34YZPRB is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable medical device buses, and FPGA I/O expansion requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across temperature extremes.
Supply support for SN74LVC3G34YZPRB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with leadership in logic, interface, and power management ICs.
The SN74LVC3G34YZPRB belongs to NXP's LVC logic family, engineered for low-voltage, high-speed, mixed-supply interoperability in space- and power-constrained embedded systems.
FAQ
What is the maximum input voltage allowed on SN74LVC3G34YZPRB pins when VCC = 0 V?
The SN74LVC3G34YZPRB supports input voltages up to 5.5 V even when VCC = 0 V, thanks to its IOFF circuitry. This allows safe hot-plug operation in modular systems. The absolute maximum rating for VI is −0.5 V to +6.5 V, but the recommended operating limit remains 5.5 V under power-down conditions per Table 5 of the datasheet.
Can SN74LVC3G34YZPRB drive a 50 pF capacitive load at 10 MHz without signal degradation?
Yes. At VCC = 3.0 V, SN74LVC3G34YZPRB delivers ±24 mA output drive and exhibits 2.2 ns typical propagation delay into 50 pF (Table 8). With CPD = 14 pF and VOL ≤ 0.55 V at 24 mA, it maintains clean edges and <1 ns skew across all three channels under these conditions.
Is SN74LVC3G34YZPRB pin-compatible with other 74LVC3G34 variants like SN74LVC3G34DCUR?
Yes. SN74LVC3G34YZPRB shares identical pin functions and logic behavior with all 74LVC3G34 variants, including SN74LVC3G34DCUR (VSSOP8) and SN74LVC3G34GM (XQFN8). Pin 1 is the index corner in all packages, and terminal assignments (1A, 1Y, VCC, GND, etc.) match exactly per Table 3 of the datasheet.
What JEDEC standards does SN74LVC3G34YZPRB comply with for voltage thresholds?
SN74LVC3G34YZPRB complies with JEDEC JESD8-7 (1.65–1.95 V), JESD8-5 (2.3–2.7 V), and JESD8B/JESD36 (2.7–3.6 V) for input threshold definitions. These ensure interoperability with TTL, LVTTL, and other industry-standard logic families across its full operating voltage range.
Does SN74LVC3G34YZPRB require external pull-up or pull-down resistors on unused inputs?
No. Unused inputs on SN74LVC3G34YZPRB may be left floating only if guaranteed to remain within valid logic levels (VIH/VIL) under all operating conditions. However, best practice is to tie unused inputs to VCC or GND via 10 kΩ resistors to prevent noise-induced oscillation and reduce ICC variation, as confirmed in NXP Application Note AN10454.
SN74LVC3G34YZPRB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74LVC3G34YZPRB FAQ
1.How can I place an order for SN74LVC3G34YZPRB through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC3G34YZPRB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74LVC3G34YZPRB reliable?
The price and inventory of SN74LVC3G34YZPRB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC3G34YZPRB is usually 5 days.
3.What payment methods are accepted for SN74LVC3G34YZPRB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC3G34YZPRB transactions.
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4.How is shipping managed for SN74LVC3G34YZPRB?
SN74LVC3G34YZPRB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC3G34YZPRB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74LVC3G34YZPRB?
For technical support, including SN74LVC3G34YZPRB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC3G34YZPRB requirements.
6.How does Aetrix verify that SN74LVC3G34YZPRB is sourced from the original manufacturer or authorized distributors?
All SN74LVC3G34YZPRB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74LVC3G34YZPRB meets industry standards.
7.What is the process for return or replacement of SN74LVC3G34YZPRB?
All SN74LVC3G34YZPRB units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC3G34YZPRB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74LVC3G34YZPRB part is unused and in its original packaging.
Return procedure for SN74LVC3G34YZPRB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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