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Texas Instruments SN74LVCH16240ADGG
- Part No.:
- SN74LVCH16240ADGG
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74LVCH16240ADGG.pdf
- Description:
- IC BUFFER INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,560
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Product details
Overview
SN74LVCH16240ADGG from Texas Instruments is a 16-bit inverting buffer/driver with 3-state outputs, designed for 1.65-V to 3.6-V VCC operation. It features bus-hold on all data inputs, mixed-mode 5-V/3.3-V signal translation capability, and power-off output disable for live insertion-used in memory address buffering, clock distribution, and bus interface applications.
For engineers reviewing the SN74LVCH16240ADGG datasheet, SN74LVCH16240ADGG pinout, SN74LVCH16240ADGG application, or SN74LVCH16240ADGG equivalent, key selection considerations include its 48-pin TSSOP (DGG) package, symmetrical active-low OE control per 4-bit section, ±24-mA drive strength at 3.0-V VCC, and guaranteed –40°C to 85°C industrial temperature range.
Technical Context
The SN74LVCH16240ADGG implements four independent 4-bit inverting buffers, each with dedicated active-low output-enable (OE) inputs. Its EPIC™ submicron CMOS process enables low ground bounce (<0.8 V) and high undershoot immunity (>2 V), supporting robust signal integrity in dense PCB layouts.
Bus-hold circuitry actively maintains valid logic levels on floating inputs without external resistors, while mixed-voltage I/O allows 5-V-tolerant inputs operating from a 3.3-V supply-enabling seamless interfacing between legacy 5-V and modern 3.3-V subsystems without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports single-supply operation across low-voltage logic families including LVT, ALVT, and LV. |
| Output Drive | ±24 mA at VCC = 3.0 V - sufficient to drive 50-Ω transmission lines or multiple CMOS loads without external buffering. |
| Propagation Delay | 4.2 ns max at VCC = 3.3 V - enables reliable operation in high-speed address/data buses up to ~200 MHz. |
| Bus-Hold Current | ±75 µA at VCC = 3.0 V - actively holds unused inputs at valid logic states, eliminating need for pullup/pulldown resistors. |
| 3-State Enable/Disable | ten = 4.7 ns, tdis = 5.9 ns at VCC = 3.3 V - fast output control critical for time-multiplexed bus arbitration. |
| ESD Rating | >2000 V HBM, >200 V MM - exceeds MIL-STD-883 requirements, enabling handling in standard assembly environments. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems and telecom infrastructure. |
Pinout & Package
SN74LVCH16240ADGG is housed in a 48-pin Thin Shrink Small-Outline Package (TSSOP, DGG), 12.5 mm × 6.1 mm × 1.2 mm body, 0.5-mm lead pitch. Pin 1 marked via notch or dot; top-side marking includes TI logo and date code.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 (Pins 47,46,44,43,41,40,38,37,36,35,33,32,30,29,27,26) | Data Inputs (Grouped by 4-bit section) | 16-bit parallel input bus; each group of four feeds one inverting buffer section. |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 (Pins 2,3,5,6,8,9,11,12,13,14,16,17,19,20,22,23) | Inverting 3-State Outputs | 16-bit buffered, inverted, high-impedance-capable outputs; driven only when corresponding OE is low. |
| 1OE, 2OE, 3OE, 4OE (Pins 1,48,25,24) | Active-Low Output Enables | Independent control per 4-bit section; OE high forces associated Y outputs into high-impedance state. |
| VCC (Pins 7,21,31,42) | Power Supply | Four distributed VCC pins reduce switching noise and improve PSRR across wide bandwidth. |
| GND (Pins 4,10,15,28,34,39,45) | Ground Reference | Seven GND pins provide low-inductance return paths for all 16 drivers and internal logic. |
Key Features
| Feature | Design Value |
|---|---|
| Bus-Hold Inputs | Eliminates external pullup/pulldown resistors on all 16 data inputs, reducing BOM count and board area in sparse-bus or hot-swap designs. |
| Mixed-Mode I/O | 5-V-tolerant inputs operate reliably with 3.3-V VCC, enabling direct connection to 5-V microcontrollers or FPGAs without level translators. |
| Live Insertion Support | Outputs automatically enter high-impedance state when VCC = 0 V, preventing bus contention during hot-plug operations in modular backplane systems. |
| Low Ground Bounce | VOLP < 0.8 V at 3.3 V ensures stable reference for adjacent logic, critical in high-density memory subsystems. |
| Symmetrical OE Architecture | Four independent OE pins allow granular control-e.g., enable only address bits 0–3 while holding data bits 4–15 in high-Z during partial bus cycles. |
Applications
| Memory Address Buffering | Industrial Bus Interface |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to SRAM or Flash memory in an industrial PLC controller. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing fanout, voltage translation, and bus isolation during memory read/write cycles. Use Value: Bus-hold prevents address glitches during reset or sleep modes; 4.2-ns propagation delay supports 200-MHz bus timing margins. |
Use Scenario: Interfacing a 3.3-V FPGA I/O bank to legacy 5-V peripheral devices on a factory automation I/O module. IC Role / Device Role / Timing Role: Level-translating buffer enabling bidirectional 5-V signal compatibility while powered from 3.3-V rail. Use Value: Eliminates discrete level shifters; ±24-mA drive sustains signal integrity over 15-cm PCB traces to remote terminal units. |
| Hot-Swappable Backplane | Clock Distribution Network |
Use Scenario: Isolating a CPU module's address/data bus from a shared backplane during live insertion/removal in telecom shelf management. IC Role / Device Role / Timing Role: 3-state buffer with power-off disable ensuring zero current injection into live backplane during module insertion. Use Value: Prevents bus contention and latch-up risk; ESD rating >2000 V HBM withstands handling in field-replaceable unit workflows. |
Use Scenario: Distributing a system clock to four synchronous peripherals (ADC, DAC, UART, timer) with matched skew and drive strength. IC Role / Device Role / Timing Role: Inverting driver delivering low-jitter, high-fanout clock signals with controlled edge rates. Use Value: Symmetrical OE control allows dynamic clock gating per peripheral; 0.5-mm pitch TSSOP fits tight layout constraints near clock sources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16240ADGGR | No bus-hold; requires external pullups/pulldowns on unused inputs; identical pinout and 3.3-V operation. | Lacks automatic input stabilization-unsuitable where floating inputs occur during power sequencing or partial initialization. | Select when BOM cost reduction outweighs reliability risk from uncontrolled input states. |
| 74ALVCH16240PAG | Higher drive (±24 mA at 2.5 V), faster tpd (3.2 ns), but wider SOIC package (13.5 mm); same bus-hold and mixed-voltage support. | SOIC-48 footprint incompatible with space-constrained TSSOP layouts; better suited for prototyping or lower-density boards. | Choose for higher speed or legacy SOIC compatibility, accepting larger board area and thermal resistance (θJA = 75°C/W vs. 89°C/W). |
Compared with SN74LVCH16240ADGG, SN74LVC16240ADGGR saves cost but increases design risk from floating inputs, while 74ALVCH16240PAG improves speed and thermal margin at the expense of PCB real estate and layout flexibility.
Availability
SN74LVCH16240ADGG is available at Aetrix Electronics and suitable for industrial control systems, telecom infrastructure, and embedded computing platforms requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SN74LVCH16240ADGG 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 connectivity technologies, with decades of experience in high-reliability logic and interface solutions.
The SN74LVCH16240ADGG belongs to TI's Widebus™ family of advanced bus-interface ICs, engineered specifically to enhance density and performance in memory addressing, clock distribution, and mixed-voltage system interconnects.
FAQ
What is the maximum operating voltage for SN74LVCH16240ADGG?
The absolute maximum supply voltage for SN74LVCH16240ADGG is 6.5 V, but recommended operation is strictly limited to 1.65 V to 3.6 V per datasheet Section 4. Exceeding 3.6 V risks parametric degradation and reduced reliability, even if within absolute ratings. The device is not rated for 5-V VCC operation.
Does SN74LVCH16240ADGG support true 5-V input tolerance?
Yes - SN74LVCH16240ADGG accepts input voltages up to 5.5 V regardless of VCC, enabling direct connection to 5-V logic families while powered from 3.3 V. This mixed-mode capability is explicitly confirmed in the Recommended Operating Conditions table and functional description of the SN74LVCH16240ADGG datasheet.
How does bus-hold functionality work on SN74LVCH16240ADGG?
SN74LVCH16240ADGG integrates active bus-hold circuitry on all 16 data inputs, drawing ±75 µA at 3.0-V VCC to maintain the last-valid logic state when inputs float. This eliminates external resistors and prevents metastability during power-up, reset, or unconnected traces - a feature confirmed in the Functional Description and Electrical Characteristics sections of the SN74LVCH16240ADGG datasheet.
Can SN74LVCH16240ADGG be used as a non-inverting buffer?
No - SN74LVCH16240ADGG provides only inverting logic: Y = NOT(A). There is no internal configuration or external pin to disable inversion. For non-inverting 16-bit buffering, TI recommends SN74LVCH16244ADGG (same package, pin-compatible, non-inverting architecture), as documented in the Widebus™ family comparison tables.
What is the thermal resistance (θJA) of SN74LVCH16240ADGG in its DGG package?
The junction-to-ambient thermal resistance (θJA) for SN74LVCH16240ADGG in the 48-pin TSSOP (DGG) package is 89°C/W, as specified in the Absolute Maximum Ratings table. This value assumes standard JEDEC 2-layer board conditions and is critical for calculating junction temperature under sustained 24-mA output loading.
SN74LVCH16240ADGG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCH
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
SN74LVCH16240ADGG FAQ
1.How can I place an order for SN74LVCH16240ADGG through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCH16240ADGG 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 SN74LVCH16240ADGG reliable?
The price and inventory of SN74LVCH16240ADGG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCH16240ADGG is usually 5 days.
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Once your SN74LVCH16240ADGG 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 SN74LVCH16240ADGG?
For technical support, including SN74LVCH16240ADGG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCH16240ADGG requirements.
6.How does Aetrix verify that SN74LVCH16240ADGG is sourced from the original manufacturer or authorized distributors?
All SN74LVCH16240ADGG 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 SN74LVCH16240ADGG meets industry standards.
7.What is the process for return or replacement of SN74LVCH16240ADGG?
All SN74LVCH16240ADGG units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCH16240ADGG, 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 SN74LVCH16240ADGG part is unused and in its original packaging.
Return procedure for SN74LVCH16240ADGG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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