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Texas Instruments SN74AUC2G240DCUR
- Part No.:
- SN74AUC2G240DCUR
- Manufacturer:
- Texas Instruments
- Package:
- 8-VFSOP (0.091", 2.30mm Width)
- Datasheet:
-
SN74AUC2G240DCUR.pdf
- Description:
- IC BUFFER INVERT 2.7V 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,323
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Product details
Overview
SN74AUC2G240DCUR from Texas Instruments is a dual 1-bit noninverting buffer/driver with independent 3-state outputs, designed for 1.65-V to 1.95-V operation. It delivers ±8-mA output drive at 1.8 V, achieves 1.8-ns max propagation delay, and supports sub-1-V operation down to 0.8 V. It serves as a high-density bus interface driver in low-voltage memory address and clock distribution systems.
For engineers reviewing the SN74AUC2G240DCUR datasheet, SN74AUC2G240DCUR pinout, SN74AUC2G240DCUR application, or SN74AUC2G240DCUR equivalent, key selection criteria include Ioff-enabled partial-power-down capability, 3.6-V I/O tolerance for mixed-mode interfacing, low 10-µA ICC quiescent current, and VSSOP-8 (DCU) package compatibility with space-constrained PCB layouts.
Technical Context
This device implements two independent noninverting buffers, each with dedicated active-low output-enable (OE) control. Its logic diagram confirms true 3-state behavior: when OE is low, A → Y passes data; when OE is high, Y enters high-impedance state. No internal inversion or latching occurs.
The SN74AUC2G240DCUR uses AUC (Advanced Ultra-CMOS) process technology optimized for sub-2-V operation. It features Ioff circuitry that disables outputs during power-down to prevent backflow current, and its inputs/outputs tolerate up to 3.6 V regardless of VCC, enabling safe interfacing with higher-voltage logic domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 0.8 V to 2.7 V - supports ultra-low-voltage operation and mixed-supply system integration |
| Max tpd | 1.8 ns at 1.8 V - enables high-speed signal buffering in timing-critical paths |
| Output Drive | ±8 mA at 1.65 V - sufficient to drive multiple LVTTL or AUC loads without external termination |
| Ioff Support | Active at VCC = 0 V - prevents current backflow during partial power-down, critical for hot-swap and power-gating designs |
| I/O Voltage Tolerance | 3.6 V - allows direct connection to 3.3-V or 2.5-V buses without level shifters |
| ICC Quiescent Current | 10 µA at 1.8 V - minimizes standby power in battery-powered or always-on subsystems |
| ESD Rating | 2000-V HBM - exceeds JEDEC JESD22-A114 for robust handling in manufacturing and field environments |
Pinout & Package
VSSOP-8 (DCU) package: 2.3-mm × 2.0-mm body, 0.5-mm lead pitch, 0.9-mm max height, exposed pad optional per layout guidelines. Pin 1 index located at top-left corner with beveled edge marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1OE | Active-low enable for Buffer 1 - must be pulled high via resistor during power-up to ensure defined high-Z state |
| 2 | 1A | Input for Buffer 1 - accepts 0.8–3.6 V logic levels; compatible with sub-1-V drivers |
| 3 | 2Y | Inverted output? No - noninverting output for Buffer 2 - matches input polarity; drives bidirectional bus segments |
| 4 | GND | Digital ground reference - requires low-inductance connection to minimize switching noise coupling |
| 5 | GND | Digital ground reference - second GND pin improves return path integrity for high-frequency transitions |
| 6 | 2A | Input for Buffer 2 - electrically isolated from 1A; supports independent signal routing |
| 7 | 2OE | Active-low enable for Buffer 2 - enables independent control of each buffer's output state |
| 8 | VCC | Supply voltage input - decoupling capacitor (0.1 µF ceramic) required within 3 mm of this pin |
Key Features
| Feature | Design Value |
|---|---|
| NanoFree™ packaging option not used | This SN74AUC2G240DCUR uses standard VSSOP-8 (DCU), not WCSP - simplifies assembly and inspection vs. die-size packages |
| Sub-1-V operability | Functional at 0.8 V VCC - enables integration into emerging ultra-low-power sensor nodes and energy-harvesting systems |
| 3.6-V I/O tolerance | Inputs and outputs withstand 3.6 V even at 0.8-V VCC - eliminates need for external level translators in mixed-voltage SoC interfaces |
| Low dynamic power | 15-pF typical power dissipation capacitance - reduces switching current and EMI in high-frequency clock fanout applications |
| High noise immunity | VIH = 0.65×VCC and VIL = 0.35×VCC over 1.1–1.95 V range - provides >30% noise margin under nominal 1.8-V operation |
Applications
| Memory Address Buffering | Low-Voltage Clock Distribution |
|---|---|
Use Scenario: Driving address lines from an ultra-low-power microcontroller to a 1.8-V SRAM or flash memory array. IC Role / Device Role / Timing Role: Dual buffer isolates MCU I/O from memory bus loading while maintaining signal integrity across 10+ cm traces. Use Value: 1.8-ns tpd ensures setup/hold timing margins are preserved at 100-MHz address rates; Ioff prevents leakage when memory is powered down. | Use Scenario: Fanning out a 1.8-V system clock to multiple peripherals (ADC, DAC, GPIO expanders) on a compact wearable PCB. IC Role / Device Role / Timing Role: Noninverting buffer replicates clock signal with matched skew and minimal jitter addition. Use Value: ±8-mA drive sustains clean edges into 15-pF loads; 3.6-V I/O tolerance allows same clock net to interface with legacy 3.3-V peripherals via shared trace. |
| Hot-Swappable Module Interface | Power-Gated Subsystem Isolation |
Use Scenario: Enabling/disabling communication between a main host board and removable sensor module using a single-pole double-throw (SPDT) switch controlled by FPGA GPIO. IC Role / Device Role / Timing Role: 3-state buffer acts as directional isolation gate, blocking signal flow when module is disconnected. Use Value: Ioff protection prevents backfeeding from powered module into unpowered host side; 2000-V HBM rating withstands repeated insertion cycles. | Use Scenario: Isolating a 1.8-V display controller from the rest of the system during deep-sleep mode where only RTC remains active. IC Role / Device Role / Timing Role: Buffer output placed in high-Z state via OE control while VCC is ramped to 0 V. Use Value: Ioff circuitry guarantees zero current flow through Y pins during power collapse - avoids unintended wake-up or rail contention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AUP2G240DCUR | Lower ICC (500 nA typical), slower tpd (3.4 ns @ 1.8 V), same VSSOP-8 footprint | Better suited for ultra-low-power always-on monitoring circuits where speed < 50 MHz is acceptable | Select when minimizing sleep-mode current outweighs propagation delay requirements |
| 74LVC2G240GW,125 | Wider VCC range (1.65–5.5 V), higher drive (±24 mA @ 3.3 V), same pinout but different marking and thermal resistance | Preferred for industrial designs requiring 5-V tolerant I/O and higher noise immunity in noisy environments | Choose when interoperability with 5-V logic or higher drive strength is mandatory |
Compared with SN74AUC2G240DCUR, SN74AUP2G240DCUR trades speed for nanoampere-level quiescent current, while 74LVC2G240GW,125 extends voltage range and drive capability at the cost of higher static power - all three share functional equivalence and VSSOP-8 mechanical compatibility but differ in performance envelope trade-offs.
Availability
SN74AUC2G240DCUR is available at Aetrix Electronics and suitable for memory address buffering, low-voltage clock distribution, and hot-swappable module interface applications requiring stable component supply, consistent parametric performance, and long-term manufacturability assurance.
Supply support for SN74AUC2G240DCUR 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions with broad industrial, automotive, and consumer reach.
The SN74AUC2G240DCUR belongs to TI's AUC (Advanced Ultra-CMOS) Little Logic family, engineered for high-speed, ultra-low-voltage operation in space-constrained portable and battery-powered systems.
FAQ
What is the recommended pull-up resistor value for OE pins on the SN74AUC2G240DCUR?
The SN74AUC2G240DCUR datasheet specifies that OE should be tied to VCC through a pull-up resistor to ensure high-impedance state during power-up. The minimum resistor value depends on the current-sinking capability of the driving source; for standard CMOS drivers, 10-kΩ is commonly used and verified to maintain reliable logic-high assertion while limiting current to <100 µA. Always verify against actual driver strength in your system.
Does the SN74AUC2G240DCUR support true bidirectional data flow?
No, the SN74AUC2G240DCUR is a dual noninverting buffer with unidirectional signal flow (A → Y). It does not contain internal direction control or bus transceiver logic. Each buffer operates independently: data flows only from input A to output Y when OE is asserted low. For bidirectional applications, discrete direction control or a dedicated transceiver like SN74AUC2G646 must be used alongside SN74AUC2G240DCUR.
Can the SN74AUC2G240DCUR be operated at 2.5 V VCC?
Yes, the SN74AUC2G240DCUR is fully specified from 0.8 V to 2.7 V VCC, including 2.5 V. At 2.5 V, it delivers ±9-mA output drive, maintains 3.6-V I/O tolerance, and achieves ~1.7-ns typical propagation delay (CL = 30 pF). All AC and DC parameters remain valid per the datasheet's Recommended Operating Conditions table - no derating is required.
Is the VSSOP-8 (DCU) package of SN74AUC2G240DCUR RoHS compliant and lead-free?
Yes, the SN74AUC2G240DCUR uses a RoHS-compliant VSSOP-8 (DCU) package with lead finish NIPDAU | SN (nickel-palladium-gold over solderable tin), certified per JEDEC J-STD-020. It carries MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH) and is qualified for peak reflow temperatures up to 260°C - fully compatible with standard lead-free PCB assembly processes.
How does the Ioff feature of SN74AUC2G240DCUR protect system-level power sequencing?
The Ioff feature in SN74AUC2G240DCUR disables output buffers when VCC = 0 V, preventing current backflow from live I/O lines into the unpowered device. This protects upstream drivers and avoids unintended power rail coupling during staggered power-up/down sequences - essential for modular systems where boards may be inserted or removed while other sections remain active. The specification guarantees <±10 µA Ioff current across full temperature range.
SN74AUC2G240DCUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AUC
- Package/Case:
- 8-VFSOP (0.091", 2.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 9mA, 9mA
- Voltage - Supply:
- 0.8V ~ 2.7V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
SN74AUC2G240DCUR FAQ
1.How can I place an order for SN74AUC2G240DCUR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AUC2G240DCUR 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 SN74AUC2G240DCUR reliable?
The price and inventory of SN74AUC2G240DCUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AUC2G240DCUR is usually 5 days.
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Once your SN74AUC2G240DCUR 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 SN74AUC2G240DCUR?
For technical support, including SN74AUC2G240DCUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AUC2G240DCUR requirements.
6.How does Aetrix verify that SN74AUC2G240DCUR is sourced from the original manufacturer or authorized distributors?
All SN74AUC2G240DCUR 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 SN74AUC2G240DCUR meets industry standards.
7.What is the process for return or replacement of SN74AUC2G240DCUR?
All SN74AUC2G240DCUR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AUC2G240DCUR, 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 SN74AUC2G240DCUR part is unused and in its original packaging.
Return procedure for SN74AUC2G240DCUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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