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Texas Instruments SN74ALVCH16240DGGR
- Part No.:
- SN74ALVCH16240DGGR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74ALVCH16240DGGR.pdf
- Description:
- IC BUFFER INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,841
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Product details
Overview
SN74ALVCH16240 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 four independent 4-bit sections, each with active-low output-enable (OE) control, bus-hold circuitry on all data inputs, and symmetrical propagation delay (typ. 3.9–5.3 ns at 3.3 V). It is used in memory address buffering, clock distribution, and high-density bus interfacing in industrial and embedded systems.
For engineers reviewing the SN74ALVCH16240 datasheet, SN74ALVCH16240 pinout, SN74ALVCH16240 application, or SN74ALVCH16240 equivalent, key selection criteria include its wide VCC range (1.65–3.6 V), guaranteed -40°C to +85°C operation, bus-hold inputs eliminating external resistors, 48-pin TSSOP (DGG) package, and precise 3-state timing (ten/tdis ≤ 6.4 ns).
Technical Context
The SN74ALVCH16240 implements four independent 4-bit inverting buffers, each with dedicated active-low OE control (1OE–4OE), enabling flexible partitioning as one 16-bit, two 8-bit, or four 4-bit drivers. All inputs include bus-hold circuitry to maintain valid logic states without external biasing.
Its EPIC™ submicron CMOS process ensures low power consumption (ICC = 40 µA max at 3.6 V), high noise immunity (VIH/VIL thresholds scale with VCC), and robust ESD protection (>2000 V HBM). Output drive strength scales with supply voltage: ±24 mA at 3 V, supporting TTL- and CMOS-compatible loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - enables interoperability across mixed-voltage 1.8-V, 2.5-V, and 3.3-V logic domains. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade reliability without derating. |
| Propagation Delay (tpd) | 3.9 ns (typ, VCC = 3.3 V) - supports high-speed address/data path buffering up to ~200 MHz system clocks. |
| Output Drive | ±24 mA (at VCC = 3 V) - drives standard 50-Ω transmission lines or multiple CMOS/TTL loads without external buffers. |
| Bus-Hold Current | ±75 µA (at VCC = 3 V) - actively retains input state during float or high-impedance conditions, removing need for pullup/pulldown resistors. |
| 3-State Enable/Disable | ten ≤ 6.4 ns, tdis ≤ 5.4 ns (VCC = 3.3 V) - ensures clean, glitch-free bus arbitration in shared-data applications. |
| Input/Output Capacitance | Ci = 3 pF (control), 6 pF (data); Co = 7 pF - minimizes capacitive loading on driving sources and downstream nets. |
Pinout & Package
TSSOP-48 (DGG) package: 48-pin thin shrink small-outline package, 12.5 mm × 6.1 mm footprint, 1.2 mm max height, JEDEC MO-153 compliant, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE–4OE (Pins 1, 24, 25, 48) | Active-low output enable | Individually controls 3-state output of corresponding 4-bit section; tied high via pullup for power-up high-Z safety. |
| 1A1–4A4 (Pins 47,46,44,43,41,40,38,37,36,35,33,32,30,29,27,26) | Data inputs | Inverting inputs for 16-bit data path; each includes bus-hold to prevent floating logic states. |
| 1Y1–4Y4 (Pins 2,3,5,6,8,9,11,12,13,14,16,17,19,20,22,23) | Inverting buffered outputs | 3-state outputs with symmetrical drive strength; high-Z when respective OE is high. |
| VCC (Pins 7, 21, 31, 42) | Power supply | Four distributed VCC pins reduce IR drop and improve noise immunity across wide 48-pin layout. |
| GND (Pins 4, 10, 15, 28, 34, 39) | Ground reference | Six GND pins provide low-inductance return paths and support stable switching for all 16 outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (1.65–3.6 V) | Enables direct interface between 1.8-V microcontrollers and 3.3-V peripherals without level shifters. |
| Integrated bus-hold on all inputs | Eliminates 16 external pullup/pulldown resistors, reducing BOM count and PCB area in space-constrained designs. |
| Four independent OE controls | Allows selective activation of 4-bit segments-e.g., isolate memory banks or clock domains without full bus reset. |
| EPIC™ submicron CMOS process | Delivers <40 µA ICC quiescent current and >250 mA latch-up immunity per JESD17, enhancing system-level robustness. |
| High ESD tolerance | Exceeds 2000 V HBM and 200 V MM, reducing field failure risk in handling-sensitive industrial assembly environments. |
Applications
| Memory Address Buffering | Clock Distribution Network |
|---|---|
Use Scenario: Driving 16-bit address lines from an MCU to multiple SRAM or Flash devices sharing a common data bus. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing isolation, fanout expansion, and bus contention prevention during memory access cycles. Use Value: Enables deterministic address settling within 5.3 ns (3.3 V), supports simultaneous multi-chip select with independent OE control per memory bank. | Use Scenario: Distributing a single system clock to multiple synchronous peripherals (e.g., ADC, DAC, FPGA config logic) while maintaining signal integrity. IC Role / Device Role / Timing Role: Low-skew, high-drive clock driver with bus-hold ensuring stable idle state when clock source is inactive. Use Value: ±24 mA drive capability sustains edge rate into 50-Ω traces; 3-state allows dynamic clock gating without signal reflection. |
| Industrial Bus Transceiver Interface | Legacy Parallel Port Expansion |
Use Scenario: Interfacing a modern low-voltage SoC (1.8 V) to legacy 3.3-V industrial I/O modules over a shared parallel control bus. IC Role / Device Role / Timing Role: Voltage-tolerant bidirectional buffer (with external direction control) managing data flow between mismatched logic families. Use Value: 1.65–3.6 V VCC range and scalable VIH/VIL thresholds eliminate external level translators; bus-hold prevents glitches during hot-plug events. | Use Scenario: Extending GPIO capabilities of a microcontroller to drive 16-bit parallel peripherals (e.g., dot-matrix displays, stepper motor controllers). IC Role / Device Role / Timing Role: Inverting output driver with configurable 4-bit segmentation for independent peripheral enable/disable. Use Value: Four OE pins allow software-selectable activation of display segments, motor phases, or sensor groups-reducing firmware complexity and interrupt load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16240DGGR | Lower drive (±24 mA at 3.3 V only; not rated below 1.65 V), no bus-hold, higher ICC (max 100 µA). | Requires external pullups for unused inputs; unsuitable for 1.65–1.95 V operation or floating-bus environments. | Choose only if cost sensitivity outweighs bus-hold requirement and VCC is fixed ≥2.3 V. |
| 74ALVCH16244DLR | Non-inverting output polarity; identical VCC range, bus-hold, and timing specs; same DGG package. | Used where signal polarity must be preserved (e.g., direct replacement in non-inverting data paths). | Select when inverting behavior of SN74ALVCH16240 conflicts with existing schematic logic flow. |
Compared with SN74LVC16240DGGR, the SN74ALVCH16240 offers guaranteed 1.65-V operation and integrated bus-hold-critical for low-power and floating-input scenarios-while 74ALVCH16244DLR provides functional equivalence with non-inverting logic, enabling drop-in substitution where polarity alignment is required.
Availability
SN74ALVCH16240 is available at Aetrix Electronics and suitable for memory address buffering, clock distribution networks, and industrial bus transceiver interfaces requiring stable component supply across extended temperature ranges and mixed-voltage designs.
Supply support for SN74ALVCH16240 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 decades of innovation in high-reliability industrial and automotive ICs.
The SN74ALVCH16240 belongs to TI's Widebus™ family of high-density bus-interface logic, engineered specifically to improve performance and layout efficiency in memory, clock, and bus-oriented systems operating across 1.65–3.6 V.
FAQ
What is the minimum VCC voltage supported by the SN74ALVCH16240?
The SN74ALVCH16240 supports a minimum VCC of 1.65 V, with guaranteed operation across the full 1.65-V to 3.6-V range. At 1.65 V, it delivers ±4 mA output drive and maintains valid VIH/VIL thresholds (0.65×VCC and 0.35×VCC respectively), making it suitable for ultra-low-voltage portable and battery-powered systems where the SN74ALVCH16240 operates reliably without level translation.
Does the SN74ALVCH16240 require external pullup resistors on its inputs?
No. The SN74ALVCH16240 integrates bus-hold circuitry on all 16 data inputs (1A1–4A4), actively maintaining the last-valid logic state when inputs float. This eliminates the need for external pullup or pulldown resistors, reducing BOM cost and PCB real estate-confirmed by TI's datasheet SCES045D, Section "Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors".
What is the thermal resistance (θJA) of the SN74ALVCH16240 in the DGG package?
The SN74ALVCH16240 in the DGG (TSSOP-48) package has a junction-to-ambient thermal resistance (θJA) of 89°C/W, as specified in the Absolute Maximum Ratings table of the official TI datasheet SCES045D. This value assumes standard JEDEC test board conditions and enables accurate junction temperature estimation under typical industrial load conditions for the SN74ALVCH16240.
Can the SN74ALVCH16240 be used as a single 16-bit buffer, or is it limited to 4-bit segments?
The SN74ALVCH16240 can be configured flexibly: as one 16-bit buffer (all OEs tied together), two 8-bit buffers (1OE+2OE and 3OE+4OE grouped), or four independent 4-bit buffers (each OE controlled separately). Its logic diagram and function table confirm symmetrical per-section operation, allowing the SN74ALVCH16240 to adapt to varying bus-width requirements without redesign.
Is the SN74ALVCH16240 pin-compatible with other 48-pin Widebus™ buffers like the SN74ALVCH162244?
No. The SN74ALVCH16240 has inverting outputs and active-low OE inputs arranged across pins 1, 24, 25, and 48, whereas the SN74ALVCH162244 is non-inverting with different pin assignments (e.g., OEs on pins 1, 2, 47, 48). Their pinouts are not interchangeable; using the SN74ALVCH16240 in place of SN74ALVCH162244 would require PCB layout revision due to incompatible signal routing and polarity.
SN74ALVCH16240DGGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVCH
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
SN74ALVCH16240DGGR FAQ
1.How can I place an order for SN74ALVCH16240DGGR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVCH16240DGGR 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 SN74ALVCH16240DGGR reliable?
The price and inventory of SN74ALVCH16240DGGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVCH16240DGGR is usually 5 days.
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For technical support, including SN74ALVCH16240DGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVCH16240DGGR requirements.
6.How does Aetrix verify that SN74ALVCH16240DGGR is sourced from the original manufacturer or authorized distributors?
All SN74ALVCH16240DGGR 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 SN74ALVCH16240DGGR meets industry standards.
7.What is the process for return or replacement of SN74ALVCH16240DGGR?
All SN74ALVCH16240DGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCH16240DGGR, 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 SN74ALVCH16240DGGR part is unused and in its original packaging.
Return procedure for SN74ALVCH16240DGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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